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000-298 - IBM WebSphere Business Integration Message Broker V5 System Administration - Dump Information

Vendor : IBM
Exam Code : 000-298
Exam Name : IBM WebSphere Business Integration Message Broker V5 System Administration
Questions and Answers : 154 Q & A
Updated On : December 12, 2018
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000-298 IBM WebSphere Business Integration Message Broker V5 System Administration

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000-298 exam Dumps Source : IBM WebSphere Business Integration Message Broker V5 System Administration

Test Code : 000-298
Test Name : IBM WebSphere Business Integration Message Broker V5 System Administration
Vendor Name : IBM
Q&A : 154 Real Questions

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IBM IBM WebSphere Business Integration

IBM Is going down - nevertheless it may also be Saved | killexams.com Real Questions and Pass4sure dumps

Image result for ibm

Introduction

In September, I wrote an article that chronicled the gradual decline of foreign enterprise Machines (IBM). The article focused on the company’s declining revenues and margins and the fallacy it is Watson that has been overhyped and over-marketed. since the article become published, issues have gotten worse for the business. Its stock rate has declined from $one hundred forty five to the existing $123.

due to this fact, its market valuation has declined from more than $130 billion to the existing $112 billion. This valuation makes IBM moderately valued in comparison to other expertise groups. In IBM, traders are paying 19X trailing salary and 8X ahead earnings. here is greatly lower than what traders are buying other old tech companies like Oracle (ORCL), Microsoft (MSFT), Apple (AAPL), and Cisco (CSCO) which have a typical ahead PE ratio of 15. similarly, IBM has a forward PS ratio of 1.forty one, which is lessen than the regular of these agencies of 4.sixty five.

all through IBM’s decline, many traders – together with Warren Buffet – have invested in the company, hoping that it's going to achieve a turnaround. they've all been disillusioned as the business’s stock has persisted to peer lessen lows. brief sellers nonetheless have been rewarded because the inventory has misplaced 17% of its price this yr. The short hobby has elevated from 14 million in January to the present 21 million.

in my view, IBM will proceed to underperform since it lacks a catalyst on the way to take the inventory greater. This evaluation may be a observe as much as the previous article and should highlight greater problems that the massive blue is dealing with and how it can also be saved.

Elephant in the Room: RHT

When enormous corporations are in decline, they have a addiction of making negative selections primarily when it comes to acquisitions. Two examples of this are the decision by way of Sears Holdings (SHLD) to acquire okay-Mart and the determination with the aid of normal electric powered (GE) to acquire Baker Hughes (BHGE). lamentably, IBM decided to comply with the footsteps of these organizations.

Two weeks in the past, the enterprise introduced that it might spend $34 billion to acquire pink Hat (RHT). IBM would acquire RHT for $a hundred ninety, which became a sixty three% top rate. In its announcement, IBM’s CEO mentioned that:

The acquisition of crimson Hat is a game-changer. It adjustments everything about the cloud market. BM will develop into the world's #1 hybrid cloud company, providing businesses the handiest open cloud answer so one can unencumber the total cost of the cloud for their groups

This announcement reminded me of what GE’s Jeff Immelt talked about when he announced the acquisition of Baker Hughes.

BHGE is an industry chief located to deliver in any economic ambiance and assist our purchasers in driving productiveness. This deal capitalizes on the present cycle in oil and gasoline while also strengthening our position for the market restoration. As we go ahead, the brand new fullstream offering hurries up our potential to extend a digital framework to consumers whereas providing world-class technical innovation and service execution. We seem ahead to carrying on with a seamless integration for our shoppers.

what is distinct in the two statements is that Immelt was right about the scale of Baker Hughes. having said that, Virginia Rometty’s statement turned into demonstrably incorrect. First, in the press convention, IBM used the be aware cloud 43 times and based on Rometty, the deal will aid IBM take an more suitable market share in the cloud trade. despite the fact, a look at red Hat’s revenues indicates a special photograph. Most of its revenues come from infrastructure-related choices whereas the next income comes from software construction and other rising know-how choices. In its 10K, it describes the subscription choices as: salary generated from red Hat enterprise Linux and linked technologies similar to red Hat satellite and red Hat Virtualizations.

supply: red Hat

This point changed into additionally cited by Barron’s article that interviewed an analyst from Bernstein who referred to that:

greater than half of crimson Hat’s revenue changed into generated by means of its common on-premise server operating-equipment company, which isn’t without delay tied to the cloud and has a slowing boom fee.

further, while Amazon’s (AMZN) cloud grew with the aid of forty six% in 2017, crimson Hat’s cloud-linked revenues rose by using just 14%. at the equal time, the annual revenues of crimson Hat are just under $three billion with the internet salary being beneath $300 million. Worse, IBM is paying 55 times RHT’s estimated income, which is a hefty valuation on account that that many corporations within the sector are obtained at four.5 instances ahead sales.

for this reason, all this does not justify the hefty $34 billion. additionally, this is no longer the first time that IBM has overpaid for its cloud services. In 2013, when it introduced the acquisition of Softlayer, it declared that:

As organizations add public cloud capabilities to their on-premise IT systems, they need business-grade reliability, safety and administration. To address this chance, IBM has developed a portfolio of high-value private, public and hybrid cloud offerings, as well as application-as-a-service enterprise options. With SoftLayer, IBM will speed up the construct-out of our public cloud infrastructure to supply clients the broadest choice of cloud choices to force enterprise innovation.

Even with the SoftLayer acquisition, IBM has lagged different cloud computing companies. it is quantity 5 within the business behind Amazon, Microsoft, Alibaba (BABA), and Google (GOOG). In public cloud, it has a market share of 6%, which is miniscule in comparison to Amazon’s forty six% market share.

briefly, IBM is following the same style followed with the aid of standard electric powered when it acquired Baker Hughes or the disastrous $10.3 billion acquisition of Autonomy with the aid of HP in 2011.

A silver lining in all here's that there's a opportunity that the deal will now not close. in the press remark, IBM referred to that it'll pay $one hundred ninety for the company. As of this writing, the company is buying and selling at $172, which is 10% lower than the proposed $190. In merger arbitrage, here's a sign that a superb number of traders don’t trust the deal will close.

next Elephant in the Room: Debt

The purple Hat acquisition is the primary amongst many challenges I didn't tackle in my old article. This deal although gifts IBM with a steadiness sheet problem. To finance the all-cash transaction, IBM will need to carry additional debt.

before the deal is closed, IBM has a debt to equity ratio of two.372, which is better than that of the friends mentioned above. Microsoft, Oracle, Apple, and Cisco have a debt to GDP ratio of 0.8867, 1.527, 1.068, and nil.fifty nine respectively. Their average is 1.01. therefore, this may irritate when the company considerations extra debt to finance the acquisition.

this could no longer be a problem for a corporation that is growing. unfortunately, as I wrote before, the company’s growth has slowed, revenues are declining, and the big bets on Watson aren't figuring out. because it has been stated, many Watson customers are considering of cutting down.

As you take into account, IBM below Rometty has turn into a large monetary engineering enterprise. To enrich self assurance available in the market, the business has borrowed closely to finance buybacks. in the past ten years, the enterprise has spent more than $40 billion in share buybacks. The chart under shows the reducing share counts for the enterprise during the past ten years.

compare this with the growth in lengthy-time period debt as shown under.

In different phrases, the deal by way of IBM to acquire red Hat will dramatically enhance its debt notwithstanding RHT’s free money circulate is increasing. this could doubtless cause decreased dividends. in fact, on account of the acquisition, the business has announced that it's going to halt the buybacks in 2020. for this reason, it's going to halt buybacks to finance a deal I agree with will no longer help it in future. Couple all this with the hefty $18 billion pension legal responsibility which is higher than that of similar organizations.

IBM will also be Saved

listed here, I even have ignored other concerns that I raised within the old article. These issues consist of the slowing growth, thinning margins, and the elevated competitors from businesses like Alibaba, Amazon, and Google.

whereas things appear dark for IBM, I accept as true with that it can be saved. other ancient technology companies have all been in a similar situation like IBM and recovered. earlier than Satya Nadella, Microsoft become loss of life. in a similar way, before Steve Jobs, Apple was demise.

an excellent location for IBM to birth is to appreciate that it is in challenge. After this, it would beginning by setting up the explanation for the issue. I agree with that the cause of IBM’s problems become its lateness within the cloud computing industry. This lengthen allowed Amazon and different companies to enter the industry and purchase shoppers. In cloud, the churn price is so low that once a corporation acquires a shopper, it could actually be sure that the enterprise will now not defect to its rivals.

next, as with other tech corporations that have recovered, IBM should still accept as true with altering its administration. The truth is that Verginia Rometty has not been a very good CEO. below her leadership, the business’s stock has declined by using more than 30% as proven beneath. at the equal time, she has been paid more than $a hundred and twenty million. If Rometty has no longer changed the business in 6+ years, what makes the board assured that she will be able to flip it round in future?

subsequent, as mentioned above, IBM should still accept as true with giving up the acquisition of purple Hat. while this can appeal to a hefty divorce bill, it can be price than the catastrophe that awaits if the deal goes on. be aware that eighty three% of all M&A offers fail and there's no reason why this will succeed. To be clear, IBM will need to make acquisitions to compete with Amazon. in reality, with the $34 billion, the business could make choice investments. for example, it could spend about $3 billion to purchase an organization like box (container) that counts 61% of Fortune 500 businesses as shoppers.

stronger, it will probably use its ventures arm to put money into small startups in an analogous means that Google has carried out it with Google Ventures. As proven beneath, IBM Ventures has not made any meaningful investments within the fresh past.

source: Crunchbase

eventually, IBM should still believe divesting its international enterprise options (GBS) section. this is a segment that offers consulting, utility administration, and international system features. In 2017, the phase generated $sixteen.38 billion in revenues, which changed into reduce than $sixteen.7 billion in 2016. The phase’s margins are the least among the different segments.

The gross margins are 25%. here's pretty much comparable to other corporations in the sector like Accenture (CAN), Wipro (WIT), and Cognizant applied sciences (CTSH) which have gross margins of 30%, 30%, and 39%. for this reason, on a sum-of parts groundwork, this segment on my own will also be price greater than $30 billion in case you compare it with its peers.

it's estimated that GBS has greater than 120K personnel. therefore, divesting the section will help the business in the reduction of the headcount and enhance margins.

remaining ideas

IBM’s inventory has persisted to decline after the announcement of the pink Hat acquisition. As I even have explained, the company continues to face major headwinds with the intention to doubtless take it lessen. although, I consider that the administrators can serve the company smartly via getting out of the RHT deal and finding better acquisition objectives, replacing the CEO, investing in early stage cloud groups through IBM Ventures arm, and diversifying the global company capabilities arm.

Disclosure: i'm/we're long AAPL, container.

I wrote this text myself, and it expresses my own opinions. i'm not receiving compensation for it (other than from in search of Alpha). I haven't any company relationship with any company whose stock is outlined listed here.


IBM pronounces WebSphere enterprise Integrator 4.2 | killexams.com Real Questions and Pass4sure dumps

Market evaluation

IBM's announcement pertains to 5 areas of the building cycle: model, combine, join, monitor and manipulate. This extends IBM's support of the business integration lifecycle again into the modelling and design phase, in addition to forward into the monitoring and managing of live business processes. IBM purchased Holosofx remaining 12 months and the new items in the portfolio are the influence of integrating the Holosofx products into the WebSphere portfolio.

The assist is equipped via right here new items or types.

IBM WebSphere enterprise Integration Modeller 4.2.three is a brand new product used to model, establish, analyze and simulate enterprise methods. This ability to research and simulate extends the portfolios reach into the very early phases of design, so together with the management consultants into the method earlier than natural builders get involved.

WebSphere company Integration Server edition 4.2 (up to now released as IBM WebSphere company Integration V4.1) is the IBM company integration answer for method integration, staff management, and commercial enterprise application connectivity. The main advancements are: using Eclipse as a necessities based building environment, enabling stronger integration with other IBM, and non IBM, equipment; functions to permit clients to eat or publish internet functions; and enhancements to the run time ambiance that deliver capabilities to view the performance of business procedures.

IBM is additionally including Retail supply Chain and Rosetta net guide to its company to enterprise connect capabilities.

IBM WebSphere company Integration video display 4.2.3, is a brand new product, according to Holosofx, and gives customisable dashboard and signals to monitor and control company strategies in precise time. This circulate into monitoring is an extension of IBM's reach and gives a greater finished built-in answer.

all the products have established availability dates of later this month.

This announcement offers IBM a really extensive coverage of the application cycle and is the glaring continuation of their Holosofx acquisition. it'll now be interesting to see how they prolong this further to contain the recent buy of Rational.

As a whole lot of the product portfolio is new it may be important to watch how the various facets of the product set integrate with every different. the use of Eclipse should still aid in this but it will probably be as a minimum one more edition before it starts off to be seamless.

I might be writing a file on Intelligence in the Messaging Layer later this yr and should document completely on WebSphere company Integrator totally at the moment.

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  • How IBM and pink Hat Will have an effect on Your Cloud method | killexams.com Real Questions and Pass4sure dumps

    Barring a heavy-handed strategy to the contemporary acquisition, IBM and crimson Hat can do some wonderful issues out there.

    IBM is an extended way from making actual machines. That part of the enterprise went with Lenovo several years in the past. So, what has been their focus ever due to the fact that? utility and capabilities. And, amongst those utility pieces and capabilities has been the cloud.

    until these days, you may additionally have heard little about IBM’s cloud presence. despite the fact i will assure you it’s there, it turned into basically struggling to compete with the likes of AWS, Azure, and even GCP. Now, with predictions like these from Gartner declaring that by using 2020, ninety% of businesses will adopt hybrid infrastructure administration capabilities and that the market in widespread may be worth $240 billion or greater – this was nearly as good a time as any to really take a dive into the cloud administration and delivery ecosystem.

    Image: Shutterstock

    picture: Shutterstock

    And IBM basically took the plunge. really, this changed into the largest acquisition or deal that IBM has ever gambled on all through its 107-year existence. In figuring out the expertise they simply took under their massive Blue wings, it could in reality pay off.

    What this skill for IBM, red Hat, and your cloud

    Let’s birth with IBM. It’s been a difficult journey for this corporation. once widely used for consistent increase and innovation, IBM has been struggling in terms of maintaining with principal business gamers. This stagnation was new and definitely uncomfortable for IBM’ers and fanatics alike. So, what to do? buy a powerful, multinational, open-supply application enterprise that’s been constructing some main options. This contains purple Hat business Linux, middleware solution JBoss, CloudForms, and the very potent cloud and container management device – OpenShift.

    For IBM, this potential opening the aperture into a quick-paced and becoming hybrid cloud market. Most of all, this potential targeting commercial enterprise shoppers and arming them with main tools round cloud administration. actually, the usage of one of the vital trade’s top of the line container management options (OpenShift) will provide IBM purchasers the sorts of equipment and capabilities to approach digital transformation efforts as well as entire expertise modernization shifts.

    The complete suggestion of "monolith to microservices" can be encompassed via this IBM+purple Hat deal. technology like OpenShift will give IBM a number one Kubernetes administration platform able to offering actual-world cloud-native solutions. This isn’t simply IBM paperware to any extent further, with purple Hat, the ammunition is fully there. mix this with a much bigger portfolio of middleware and robust cloud-ready (and validated) developer equipment and you've got a very mighty story for hybrid cloud deployment and administration.

    “With IBM’s recent movement to containerize its middleware, today’s landmark partnership between IBM and purple Hat gives customers with more alternative and adaptability. Our general vision for hybrid cloud using container architectures allows for thousands and thousands of companies – from banks, to airways, to executive corporations - to entry main expertise from both businesses while not having to make a choice from public and personal cloud.”

    - Arvind Krishna, Senior vp, IBM Hybrid Cloud

    For IBM, purple Hat (and OpenShift) is an immediate gateway into a developer group that’s actually designing the architecture for business companies and their hybrid cloud initiatives. Did IBM pay a premium for crimson Hat? You superior accept as true with it. became it value it? Time will tell. Coming from at the back of is rarely effortless, however this is a very good way to put a turbo engine for your cloud business.

    For pink Hat, there are pretty big benefits, too. aside from the massive amounts of resources and scale capabilities, crimson Hat is entrenching itself even further into an enterprise market that’s primed and capable for the cloud. Now, imagine leveraging crimson Hat equipment to impact all of those spectacular IBM clients which have been itching for an IBM-equipped hybrid cloud architecture.

    “by means of extending our long-standing collaboration with IBM, we’re bringing together two main business application platforms in crimson Hat OpenShift Container Platform and IBM Cloud deepest and adding the vigor of IBM’s application and cloud options.”

    - Paul Cormier, President, products and technologies, crimson Hat

    based on a fresh red Hat statement, through the acquisition, IBM and pink Hat consumers can now:

  • Maximize their current know-how investments and move them more with ease to the hybrid cloud with IBM Cloud deepest and pink Hat OpenShift serving because the standard basis;
  • construct and installation containerized purposes on one single, integrated container platform IBM Cloud inner most presenting a single view of all commercial enterprise statistics;
  • permit developers to design, modernize, and install new applications more at once while taking knowledge of IBM’s cloud-primarily based features such as artificial intelligence (AI), internet of issues (IoT) and blockchain with IBM Cloud inner most on red Hat OpenShift Container Platform.
  • “joining forces with IBM,” spoke of purple Hat CEO Jim Whitehurst, “will supply us with a more suitable stage of scale, materials and capabilities to accelerate the have an effect on of open source as the groundwork for digital transformation and bring crimson Hat to a fair wider viewers, all while keeping our interesting lifestyle and unwavering dedication to open source innovation.”

    this is the place I should pump the brakes, simply slightly. I in fact hope that IBM doesn’t go heavy-passed in attempting to trade red Hat’s market definition and lifestyle. as a result of if it tries to push purple Hat to adopt a broader IBM cultural and corporate model, I don’t basically see it ending smartly. Plus, I’m bound there at the moment are additional considerations from current pink Hat consumers: What’ll ensue to RHEL? How does this influence licensing and the equipment that i use? Do I deserve to look at rivals like Pivotal or other options like Cloud Foundry? once again, time will inform how this can all play out. My hope is for an easy integration, whereas keeping pink Hat simply as stunning because it is today.

    eventually, it’s vital to remember what this will imply in your hybrid cloud and standard cloud administration solution. Barring a heavy-handed strategy to this acquisition, IBM and red Hat can do some truly impressive things in the market. here's honestly the primary time in a long time that IBM pushed itself into the forefront of cloud, container, and hybrid cloud innovation. The entertaining half is how IBM will integrate other solutions, Watson as an example, into red Hat items. If carried out right, there may also be a lot of merits for the customer, businesses, and the cloud in common. I’m staying positive.

    bill is an enthusiastic technologist with event in numerous industries. This comprises statistics core, cloud, virtualization, protection, AI, mobility, area options, and lots extra. His structure work includes massive virtualization and cloud deployments as well as ... View Full Bio We welcome your feedback on this theme on our social media channels, or [contact us directly] with questions concerning the site.

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    000-298 IBM WebSphere Business Integration Message Broker V5 System Administration

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    IBM WebSphere Business Integration Message Broker V5 System Administration

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    Typical Usages of Appliances | killexams.com real questions and Pass4sure dumps

    This chapter is from the book 

    While the appliances are quite versatile and can thus be used to solve many different types of problems (and implementers have been quite creative in this regard), we find there are a few common use cases that are typical. These generally focus around security, performance, cost savings, and integration. In the following sections, we discuss each of these in more detail.

    Solving Security Problems

    Let’s think about what it would take to deploy a software-based proxy product in the DMZ. Each of the layers of the ‘typical server’ shown in Figure 1-2 requires specialized skills to install and maintain. Particularly for DMZ deployments, the server hardware itself must be hardened. In highly secure environments, this can involve removing any components that might allow information to be taken from the server, such as USB ports and writeable CD/DVD drives. The operating system must also be hardened, removing components such as telnet and sendmail.3 Often, this results in other layers of the software stack not installing or operating properly! If you are successful in installing the application software stack, it must be hardened as well. These are common requirements for high security environments such as financial companies, intelligence services, and military applications.

    Although software-based DMZ components can be hardened successfully, it is a lot of work. Compare this with the simplicity of installing a dedicated, highly secure hardware appliance, purpose built to do a few things well with fairly simple administrative interfaces, as shown in Figure 1-3.

    The appliances are hardened out of the box. For example:

  • They are designed with security in mind from the ground up, before anything else.
  • They are shipped secure by default; virtually every feature is disabled, including the network adapters and administrative interfaces (except for the serial port used to do initial bootstrap). If you want something, you must turn it on!
  • They have an encrypted file system.
  • They have no Java, print services, or shareable file system.
  • They are tamper-proof—backing out the screws on the case disables the appliance.
  • They have specialized secure handling of crypto keys and certificates.
  • They have an embedded operating system, not prone to known exposures of common OSs.
  • They reject messages by default, unless specifically accepted by configured policies.
  • The age-old rule for the DMZ is to terminate client connections there and then proxy connections to the backend from the trusted DMZ servers. However, in the field we find even more stringent security policies that do not warrant any traffic (even proxied through these secure intermediaries) to the backend until the client is authenticated and authorized. This is referred to as perimeter security and is an increasingly common requirement, driving sales of DMZ security products such as TAM. Later, we show how DataPower appliances can also solve this problem.

    Another requirement for DMZ components is to virtualize or hide the implementation details of backend servers and applications. Typical DMZ products interact only with the protocol layer of the network stack, so they can hide things like hostname/IP, ports, and URIs, whereas XML-centric application proxies such as DataPower appliances can virtualize on a much more intelligent basis and can analyze the entire message stream.

    A strong reason for using these types of appliances is the burgeoning risk of systems becoming compromised by XML-based threats. Just as once upon a time we felt HTTP to be innocuous, today we are susceptible to underestimating what can be done by virtue of XML. In Chapter 20 “XML Threats,” we show how entire infrastructures can be brought down using small, simple, well-formed XML files. Only hardware appliances have the processing power to check for the many variations of XML threats.

    Another common security problem is a mismatch in the specification levels or credential formats of various technologies across large corporate IT infrastructures. For example, consider a marketing IT silo running on Microsoft®.NET using WS-Security 1.0 and SPNEGO credentials for identity and a manufacturing silo using IBM WebSphere Application Server (WAS), WS-Security 1.1, and LTPA credentials for identity. In today’s ESB-driven SOA architectures, a single transaction may have to pass through both environments, so this presents challenges. Because DataPower appliances incorporate a wide range of the latest specification implementations and credential formats, they can be used to transform messages and credentials to fit the target each step of the way. Notice that this can be used to achieve cross-platform single-signon (SSO), although that also depends on other factors such as having a common registry.

    To Lower Total Cost of Ownership (TCO)

    Refer back to the scenario in Figure 1-2, where there are numerous skills required to install and maintain a typical server and software stack. Now think of this in terms of the staff required and cost to the organization. With self-contained appliances where the operating system and file system characteristics are irrelevant from an administrative perspective, this becomes much less work. The function of the appliances is dedicated and streamlined, hence the administrative tasks and interfaces tend to be as well. For example, in the scenario in Figure 1-2, you have to continually install fixes and updates at every layer of the stack. However, for appliances, you typically do this by uploading a small firmware update and rebooting, which takes only minutes. In the server scenario, you have multiple different administrative consoles to manage the layers of the stack; with the appliances, you have only one console.

    The TCO return does not solely manifest itself in the setup and administration of the platform. Consider the silo example in the prior section—where various areas of a corporate IT infrastructure are running Web services across different platforms, such as those from IBM, Microsoft, and BEA. If the corporation has one set of policies for security and SLM that need to be implemented across all these platforms, then it must be done multiple times, by multiple people, with skills on each platform. Not only is the configuration redundant and therefore expensive, but this problem is repeated each time it needs to change, and there is always the risk that the policy will not be implemented exactly the same on each platform, which can lead to security holes or application failures. This is depicted in Figure 1-4.

    Figure 1-4

    Figure 1-4 Redundant administration versus simplified appliance model.

    A more concrete example can be implemented by creating a single service that acts as a Web service proxy on the DataPower appliance, importing the WSDL files for the Web services providers on each of those backend platforms, and then applying the security and SLM policies on the proxy, thereby gaining policy definition and enforcement one time for all platforms. All this is based on standards that we discuss later, not only Web services itself, but also the accompanying standards such as WS-Security for security, WS-Policy for policy definition, WS-Addressing for endpoint resolution, and WS-Management and WSDM4 for management.

    Enhancing Performance

    XML is the foundation on which many modern architectures are built—it has evolved into SOAP for Web services and is found across the breadth and depth of the SOA stack and related specifications. Over time, it has evolved from a simple markup language to something quite complex and sophisticated. Of course, the problem as far as performance is concerned is that XML is fairly easy for humans to read, but not for computers. It is a verbose representation of data and typically requires significant resources in terms of CPU power and memory to process. This overhead is typically found in parsing the XML document into an in-memory representation and in validating the XML against its schema file.5

    Consider the impact of parsing and validating the storm of XML/SOAP documents that hit your systems during peak production levels. Now consider the overhead of security that may be embedded in those messages—validating client identities against LDAP servers, verifying digital signatures, and decrypting encrypted data. This requires a tremendous amount of processing power and time and robs precious cycles away from what your backend systems should really be doing—focusing on transactional business logic! Also consider the absolute waste of expending these cycles for messages that come in badly formed, with schema violations or illegitimate security issues. The cycles expended on processing them and handling the errors are wasted. Figure 1-5 shows a graph demonstrating the CPU overhead of various common tasks. (Notice the parsing level is low here—the main hit when parsing is memory utilization.) Notice the impact of security operations. This can be helped somewhat with hardware-assisted acceleration, but the cost-benefit of hardware acceleration boards is often debated. Also note that abusing these security features to consume CPU resources is one way of mounting attacks.

    A grand solution for this, of course, is to use appliances to do all that heavy lifting at near wire speed. As you will see when we discuss the appliance characteristics, they are amazingly fast and can handle these tasks at orders of magnitude faster than software-based solutions running on standard servers. Now focus on another scenario—one where the appliance makes sure that only clean traffic gets to the backend systems. Imagine the huge differential in available processing power on the backend if the validation and security tasks are done by the time the traffic gets there. The appliances can validate schemas, verify signatures, decrypt the data, and more. This can often result in huge performance returns, depending on considerations such as message sizes, cipher strengths, network latency, and so forth.

    Speaking of message sizes, this is often another major stumbling block for Java-based software systems processing XML. In modern day real-world systems, we are now seeing huge SOAP messages on the order of hundreds of megabytes or even gigabytes in size. The conundrum is how to process these, given constraints on maximum JVM heap sizes in many platforms. Due to aggressive built-in streaming and compression, appliances can handle messages larger than their actual memory space.

    On another message-related topic, consider applications that do XML transformation between differing schemas; for example, an application that consumes XML purchase orders and must understand a variety of incoming purchase order formats from business partners, and then transforms each into the one “golden” purchase order schema that this company uses. These transformations can be quite expensive to process (see Figure 1-5) and result in bloated application code. We all know that line-for-line, application code is expensive in terms of programmer time, testing, and debugging. Now consider the effect on the application if the transformations were moved out to the appliance on the frontend so that the backend application now gets only the one “golden” schema format. Yes, our application has gone on quite a diet, is less expensive to maintain, and is much faster. One field scenario consisted of a frontend cluster of Java EE applications to do such transformations to keep the cluster of business logic applications behind it lightweight. However, since this was running on a platform that charged for CPU time, and given the overhead of XML transformations shown in Figure 1-5, it was expensive. The solution was to move the transformation layer out to DataPower appliances. The result was a huge cost savings and orders of magnitude faster processing.

    Integrating Platforms

    In the previous section, we discussed a scenario in which the appliance could be used to bridge differences in standards specifications (WS-Security v1.0 versus. v1.1) and identity credentials (SPNEGO versus LTPA) across systems. This is one good example of easily integrating disparate platforms, particularly when the standards and specifications are in flux. It is difficult for software-based solutions running on standard servers and products to keep up with this. On the appliance, you load a firmware update to get the latest and greatest.

    However, there are other issues that arise when integrating different platforms. Consider a scenario in which a medium-sized business XYZ Corp has its infrastructure running on legacy platforms and technologies, perhaps mainframe-based EDI. The business partners that they depend on have long since moved their platforms to Web services and are telling poor XYZ Corp that they can no longer afford to support XYZ’s legacy interface to that system, and they must provide a modern SOA or Web services interface or lose the business. This puts XYZ in a bad position; what will it cost to retrain its programmers, rewrite its COBOL applications, and revamp the backends to its Java EE platforms? Likely, it would be a staggering amount! A common solution to this problem is to place appliances at the front of the network as proxies, cook up a WSDL file to describe some Web services, begin receiving the ASCII SOAP messages from the now-happy business partners, and convert them on-the-fly to EBCDIC EDI or COBOL Copybook messages and send them over MQ or IMS Connect to the legacy backend. The backend does not have to change, and no programs have to be rewritten—a win-win!

    Due to the variety of protocols (HTTP(S), FTP, MQ, JMS/JFAP, IMS, NFS, TIBCO, MQ, ODBC, SNMP, and so on) supported by the DataPower appliances, there is a wealth of opportunity for protocol bridging, content enrichment, and integration between platforms. Notice that the previous scenario involved message transformation. The XI50 DataPower appliance can handle either XML-to-XML or non-XML transformation scenarios, meaning that messages can be transformed to the appropriate format for any intended backend.

    Another common and age-old scenario related to integrating platforms is dynamic routing. Because it is often a requirement to make dynamic routing decisions “on the edge of the network,” we have DMZ Web servers, proxies, and load balancers handle this. The problem is that they can understand only the protocol and not the payload of the message. To accomplish the goal, applications place some value in the protocol header to facilitate the content-based routing. As an example, if we want any purchase orders over one million dollars to be routed to high-priority servers, the sending application would place a cookie or attribute in an HTTP header or URL parameter. The Web server, proxy. or load balancer in the DMZ would be configured to check for this and then route the traffic accordingly. The problem with this scenario is that you have to put this hack in the applications and the HTTP payload, potentially disclose message data to attackers, and involve the sender/client. This solution doesn’t scale because if you continually do this, the HTTP header and application code bloat.

    Because SOA appliances are XML-savvy and can use technologies such as XPath, they can check inside the message payload to look for the actual <po_value> element rather than alter the application and HTTP header. If the message is encrypted, you don’t need to expose this by externalizing the data; you can just decrypt the message and check the value, and then route accordingly. The client in this case does not have to be complicit—the routing is truly dynamic and transparent. The XML Aware Network layer is shown in Figure 1-6.

    One last important feature in regard to the integration story is the use of appliances as ESBs. The appliances fulfill the model of an ESB by virtue of their strong routing, transformation, mediation, and protocol-switching capabilities. IBM has other ESB products capable of implementing the ESB pattern—WebSphere Message Broker (WMB) and WebSphere Enterprise Service Bus (WESB). Each of these have unique capabilities that may suit them for particular usages. Although DataPower may be thought of as a highly secure and performant ESB, the others have features that DataPower does not have in the arenas of transactionality, persistent message handling, and the capability to work in other programming languages. We discuss ESBs in Chapter 5, “Common DataPower Deployment Patterns,” and Chapter 9, “Multi-Protocol Gateway.”


    Understanding SAP NetWeaver process integration | killexams.com real questions and Pass4sure dumps

    This is the third installment in our series of articles entitled "Using IT Practices and IT Scenarios to understand SAP NetWeaver." Today's topic is the IT practice end-to-end process integration. This topic highlights capabilities related to SAP NetWeaver Process Integration. 

    End-to-end process integration is an IT practice that enables disparate applications and business partners' systems to exchange information and execute transactions smoothly, operating as if they were a single system. By integrating a variety of processes, businesses have timely access to accurate data, allowing them to gain a number of advantages, such as accelerating time-to-market of products and services, maximizing partner business results through synchronized product catalogs, and being more responsive and adaptive to changing conditions.

    End-to-end process integration has the following IT scenarios:

    Enabling application-to-application processesEnabling business-to-business processesBusiness process managementBusiness task managementEnabling platform interoperability

    Enabling application-to-application processesApplication-to-application (A2A) integration is the message- and standards-based integration of intra-company processes by seamlessly connecting SAP and non-SAP applications. A2A includes integration of all applications within your corporate enterprise.

    Many companies have individual, point-to-point integration, using whatever technology was available at the time when the integration was implemented. They often need to combine a patchwork of integration solutions. Companies also need to create centralized knowledge and management of integration, and they need to reduce high maintenance costs that are caused by a grown and not adaptable infrastructure.

    The main capabilities of A2A processes within SAP NetWeaver include: Provide one platform to manage design, configuration, and execution of business processes. Use shared collaboration knowledge based on open standards. Allow integration of SAP applications and 3rd party components.

    A2A integration involves configuring your system landscape, designing your integration scenarios, configuration of the scenarios, handling messages, and monitoring. The Integration Builder with SAP NetWeaver Exchange Infrastructure enables you to design and configure your A2A requirements. We will use the following graphic to discuss the primary technical components included in A2A.

    SAP NetWeaver Exchange Infrastructure

    Configuring the system landscapeBefore you can configure the exchange of messages between your various internal applications, each of those applications must first be defined. This is done as part of the configuration of your system landscape. The System Landscape Directory (SLD) is a SAP NetWeaver component that enables you to define your complete system landscape in one central directory. Of course, it takes into account both SAP and non-SAP systems. The System Landscape Directory contains two kinds of contents: the component information and the landscape description. The landscape description provides an exact picture of installed landscape elements including the connections between the systems. The content of the landscape description is created during the landscape implementation and automatically maintained through the whole software lifecycle.

    The component information describes the building blocks of solutions and their possible combinations and dependencies. It describes the world of installable landscape elements. The various types of dependencies between building blocks play an important role in landscape implementation, change management and solution validation. The content of the component information is delivered by SAP and can be updated.

    The System Landscape Directory is an implementation of the Distributed Management Task Force's (DMTF) Web-Based Enterprise Management (WBEM) initiative. WBEM is a set of management and Internet standard technologies developed to unify the management of enterprise computing environments. Part of WBEM is the Common Information Model (CIM), a data model and conceptual view of the environment that unifies and extends existing instrumentation and management standards using object-oriented constructs and design. The implementation of System Landscape Directory makes use of these standards so that third-party products can benefit from System Landscape Directory as well as components of the mySAP Business Suite, in an open and standardized way.

    Designing A2A integrationIn the previous graphic, you see the Integration Builder and the Integration Repository. The Integration Repository is where you model each of your integration scenarios. You define your scenario description, interfaces, interface mappings, message mappings, and data types in the Integration Repository. SAP provides process integration content for this repository. One example of content is mappings and data types for SAP's Supplier Relationship Management application. You can easily import both SAP and non-SAP content. Your existing integration knowledge can be reused by the import of existing XSD, XSLT, and WSDL documents.

    Configuring A2A integrationThe Integration Directory of the Integration Builder is where configuration settings are done. The configuration settings adapt a particular scenario to your system landscape. Examples of actions that happen in the configuration phase include the definition of sending and receiving systems, collaboration profiles for security settings, flexible routing rules based on message payload, and central configuration of technical connectivity (adapter usage).

    Handling MessagesThe Integration Server handles the message processing at runtime. Messages are processed on the message pipeline based on SAP's robust and highly scalable SAP NetWeaver Application Server. This enables high volume processing on scalable application servers. It manages event driven message processing. The Integration Server receives a message, decrypts the message, performs routing, mapping, transformation, performs channel determination, encrypts the message, and sends the message to the appropriate receiver.

    MonitoringOur central monitoring environment enables message monitoring, end-to-end monitoring, performance monitoring, fast message search using TREX search engine. Additionally, for companies using Solution Manager to manage their implementation projects and monitoring, Solution Manager can be used as the central monitoring tool for the entire landscape. It can be used to assist with service level monitoring and reporting.

    Further reading for enabling application to application processes: http://www.sap.com/solutions/netweaver/components/xi/index.epxhttp://service.sap.com/netweaverSelect System Landscape Directory in the Key Capabilities area. (Alternatively, go to http://service.sap.com/sld). Select Integration Broker in the Key Capabilities area. (Alternatively, go to http://service.sap.com/xi).Orb, Joachim and Jens Stumpe. SAP Exchange Infrastructure. SAP Press, 2005.

    Enabling business-to-business processes Industry business messaging standards in use today are developed by consortia of companies primarily from within specific industries. Their main goal is to develop open standards and processes that enable trading partners within and across industries to exchange standardized business messages within an e-business environment. Some of these standards include, for example, RosettaNet for the high tech industry, CIDX for the chemical industry, PIDX for the petroleum industry, and so on. SAP NetWeaver supports these industry verticals within the technology offering by providing them with business packages. These business packages contain the collaboration knowledge as defined by the industry standard and also the technical B2B adapters that are needed to do the actual transport, routing, and packaging of these industry standard messages.

    Companies need out-of-the-box support for specific industry verticals. By providing the business packages for the different industry verticals, customers can quickly get connect to their different business partners, vendors, and suppliers by using the processes and methodology defined by the industry vertical. Companies also need to handle different versions of the standard interfaces centrally. They also require the ability to manage trading partners centrally, maintaining collaboration profiles and agreements as defined by the industry vertical standard. Additionally, companies may have smaller business partners who need support in order to exchange XML documents using industry standards.

    The enabling business-to-business processes IT scenario describes how, based on standards and the exchange of messages, you can integrate cross-company processes. In doing so, you connect various applications (both SAP and non-SAP) and orchestrate the process flow between them. Using SAP NetWeaver, you can centrally design, configure and execute business-to-business (B2B) processes both within and beyond your company. SAP NetWeaver provides functions to enable you to create and manage collaboration profiles and agreements between business partners. It supports B2B industry standards, such as RosettaNet Implementation Framework (RNIF) or CIDX. You use the SAP Partner Connectivity Kit (PCK) to exchange XML documents between smaller business partners or subsidiaries.

    The technical components for B2B build on the A2A components discussed earlier. You still use the Integration Builder (including the Integration Repository and Integration Directory), the SLD, and the Integration Server. You still have the major steps of configuring your system landscape, designing your integration scenarios, configuration of the scenarios, handling messages, and monitoring. However, in B2B, you also have to install the business package and configure the B2B integration.

    The installation of the business package includes importing the SAP provided pre-defined business packages that are available for the different industry verticals like the RosettaNet or CIDX business package.

    The configuration of B2B includes collaboration agreements and profiles. Collaboration agreements include the type of adapter that should be used, and the security settings (signatures, authentication). The collaboration profile contains all the technical options that are available to communication parties for exchanging messages.

    If you want to use the B2B scenario to enable your smaller business partners to exchange XML messages, use the Partner Connectivity Kit (PCK). Your small business partners can install the Partner Connectivity Kit and configure B2B integration with your company. The PCK can be installed in a subsidiary or in the smaller partner's enterprise. The configuration includes configuring collaboration agreements, profiles, message mappings, and configuring the relevant technical adapter.

    For more information on our industry standards support, see http://service.sap.com/xi, then select Industry Standards Support.

    Business process managementBusiness Process Management integrates processes within and across systems and enables model-driven process flexibility. With Business Process Management, we focus on the process models that define processes and can be used to drive the execution of the process. This includes central orchestration, loosely coupling diverse systems.

    In most companies, the business owner and the IT expert do not speak the same language. They each have different tools they use to describe the process, and these tools are normally not linked together. There also is no navigation from the business model to the technical configuration. Oftentimes there is no common process repository, and there are missing controls across application boundaries.

    Business Process Management seeks to address these issues through business process models, service infrastructure, and process integration. We will use the following graphic to discuss the delivered components for Business Process Management.

    Business Process Management

    For business modeling, you can use ARIS for SAP NetWeaver, which provides functions for modeling, designing, analyzing and documenting processes.

    In October 2003 SAP and IDS Scheer announced a strategic co-development to integrate IDS Scheer's ARIS Process Platform with SAP NetWeaver, with the goal to create a comprehensive business process management solution (BPM) aligning technology with business processes. The product will support the entire process lifecycle leading to an extended BPM solution allowing the customer to optimize business processes from modeling to monitoring: design, model, configure, execute, monitor. ARIS for SAP NetWeaver, available as product from SAP or IDS Scheer, marks the first milestone on the way to an extended BPM solution.

    ARIS for SAP NetWeaver provides centralized administration of process information in a multilingual system tool. You can use this knowledge for project documentation, global system implementations, end-user training, and optimization projects. ARIS for SAP NetWeaver provides modeling capabilities to cater for the process architecture model of business scenarios, business processes and process steps. A value chain diagram describes the end-to-end company process map. In a business scoping phase you continuously improve the business blueprint by selecting all relevant business scenarios and application components involved.

    The SAP Solution Manager provides you with the relevant SAP reference models. You can create an implementation project using ARIS for SAP NetWeaver and then synchronize it using the SAP Solution Manager. This enables you, for example, to make SAP reference models available in ARIS for SAP NetWeaver, and adapt and enhance them as required. Finally, you can make the implementation project available again in the SAP Solution Manager, where you can then configure the processes and adapt them to your specific system landscape. The SAP Solution Manager also provides you with an extensive range of functions for monitoring your solutions.

    For integrating external or legacy systems, you can define integration scenarios and integration processes in SAP NetWeaver. We provide patterns to help you get started using integration scenarios.

    Using SAP Business Workflow, you can automate processes embedded in SAP applications. You can even combine embedded and unbounded processes.

    Note: You can download demos of BPM processes and ARIS by going to http://service.sap.com/bpms and selecting IDS Scheer partnership.

    Business task managementBusiness task management provides business and technical users with event-driven work items, alerts, business context and guided procedures to effectively react upon process exceptions and tasks. Business task management specializes in the human interaction. It can be described as the location where business process management requires human interaction.

    Business tasks are the activities generated either by the company's underlying business processes or by the users themselves as reminders for their own benefit or in order to delegate work to colleagues. The sooner your users complete the tasks, the quicker the processes run. The easier it is for users, departments and companies to generate and track the tasks, the higher the quality of the output from the processes and the higher the transparency of processes within a company. Tasks in SAP NetWeaver span the range from collaboration tasks generated manually in response to exceptions through work items generated from automated business processes.

    Tasks in SAP NetWeaver are typically links to activities or transactions rendered by the mySAP Business Suites or form-based tasks, such as in Manager Self Services using interactive forms based on Adobe software, for the occasional user.

    Business task management will be discussed in more detail in our next article in this series.

    Enabling platform interoperabilityIn the past decade, companies made large-scale IT investments in best-of-breed products. As a result, environments are heterogeneous because the products come from different vendors. Extensions of the existing infrastructure are difficult to realize. However, collaboration across company boundaries becomes more and more important.

    Interoperability is the ability of two or more systems or components to exchange information and to use the information that has been exchanged.

    Enabling platform interoperability includes leveraging the existing IT investments and the existing skills of your people. It includes organizational infrastructure, including cross-company processes in heterogeneous environments and seamless operation of different technologies used across the company.

    This scenario focuses on:

    Portal interoperability (SAP NetWeaver Portal)Messaging interoperability (SAP NetWeaver Exchange Infrastructure)Web services interoperability (SAP NetWeaver Exchange Infrastructure and SAP NetWeaver Application Server)System management and infrastructure interoperability (Life Cycle Management)Development support (.NET interoperability)

    The main processes include the enablement to combine and allow co-existence of different technologies and products within your SAP NetWeaver landscape and the ability to configure and administer connectivity and interoperability on various levels and layers. Also included is the requirement to define communication and message channels on which information exchange is implemented. The final process is to extend and complement your SAP NetWeaver landscape with other third-party vendor functional, operational, and administrative products.

    Portal InteroperabilityPortal interoperability includes the ability to leverage two portals to combine content between SAP NetWeaver Portal and a non-SAP portal technology. The portal delivers pre-built business packages for SAP applications in a unified user interface. The companies need to leverage pre-built, out-of-the-box and relevant content from different portal solutions. This helps to avoid custom development costs and maintenance problems. In some cases, it makes sense to run two portals side-by-side in a coexistence pattern, delivering specific content to different groups of users. In other cases, one portal may already be implemented and up-and-running as the leading portal. One of the portals needs to take the role of the leading portal. Regardless of the strategy, several areas need to be ensured: single sign on, user management, appropriate granularity of access in combination with central concepts for navigation and look and feel.

    Messaging – Enterprise application interoperabilityMessaging interoperability describes the integration of SAP NetWeaver and Microsoft BizTalk server. Also included is integration between SAP NetWeaver and the IBM WebSphere Business Integration (WBI). Using SAP NetWeaver you can keep the benefits of the functionality based on the other products, but enhance it using the SAP NetWeaver features. The SAP NetWeaver platform enables you to work seamlessly with other common messaging infrastructures (IBM and Microsoft) to leverage current investments and add value with SAP NetWeaver Process Integration. Messaging is a proven technology to interconnect between systems based on different technologies, leveraging point-to-point and mediated brokering communications. SAP NetWeaver supports such standards, such as the Java Message Service (JMS). SAP NetWeaver can use a SOAP connection to connect to the Microsoft BizTalk server as well as to IBM WBI.

    Enterprise/ Web services interoperabilityEnterprise and Web services interoperability shows you how you can develop services based on Web service standards, and how you can apply these services. Web services and the respective support in application server technologies are prerequisite to ensure interoperability for providing and consuming Web service enabled interfaces across different application platforms.

    System management and infrastructure interoperabilityIn a large and complex IT landscape, you must have a system management solution in place. This variant of interoperability introduces you to integrating the SAP NetWeaver with the Microsoft Windows Operational System and IBM's Tivoli system management portfolio. To leverage and integrate the SAP applications in the IT system landscapes including solutions from third party vendors, SAP NetWeaver has combined these assets to achieve optimization, availability, security, and provisioning for your entire SAP and IT environment. You can combine the SAP NetWeaver's capabilities with market-leading system management tools in the areas of storage and archiving, identity and access management, monitoring, provisioning, scheduling, and others.

    Development supportThe interoperability of development support offers development tools for alternative development platforms, namely Microsoft .NET so that customers and partners can build content and solutions for SAP NetWeaver.

    This describes the SAP NetWeaver Portal Development Kit (PDK) for .NET which is a key element for interoperability between SAP NetWeaver and .NET. This connector consists of an add-in for Microsoft Visual Studio 2003 and a runtime service that handles communication between the .NET platform and the SAP NetWeaver portal platform. Using the PDK, you can design portal components, use standard SAP user interface controls, and use SAP portal services such as system landscape and user management on your .NET platform in a manner that is simple and transparent to the end user.

    SummaryIn this article we have provided an overview of all components included in the IT Practice, End-to-End Process Integration. The practice uses many technical components within SAP NetWeaver Process Integration. The IT scenarios include application-to-application integration, business to business process integration, business process management, business task management, and enabling platform interoperability. SAP NetWeaver Exchange Infrastructure is a core technical component in this practice. It supports A2A, B2B, and BPM business processes. Additionally, it provides message interoperability.

    For more information on any IT Scenario, see http://help.sap.com. Select Documentation, SAP NetWeaver, select your language, then "IT Scenarios at a Glance".

    Don't miss the other parts in this series!Part 1: Using IT practices and IT scenarios to understand SAP NetWeaver -- introductionPart 2: Enterprise services architecture (ESA)Part 4: User productivity enablement 


    Implementing Retries with a MDB or an MQ Batch Job? (WAS 7, MQ 6) | killexams.com real questions and Pass4sure dumps

    We need to listen for messages distributed via Websphere MQ to get informed when an employee joins or leaves IBM. And because the resources used in the processing (a database, a webservice) may be temporarily unavailable, we must be able to deal with such outages, which may range from minutes to hours, by repeatedly retrying the processing after some delay. And we must be also able to deal with “poison messages”, that means messages whose processing always fails either because their content is invalid or because their data isn’t consistent with the database.

    The question is whether this would be better implemented as a Message-Driven Bean (MDB) or a batch job regularly checking its queue given that we have Websphere Application Server 7 (and thus Java EE 5) and Websphere MQ 6, which both have some important changes compared to the previous versions. It turns out that it depends – both approaches have some advantages and disadvantages and so it’s a question of the likelihood of particular problems and business requirements and priorities.

    Setting the scene MDB vs. a batch job: the decision factors

    Whether we should select the MDB or the batch job approach depends on a number of factors, some of them are:

  • Requirements
  • Quantity: What quantity of messages do we need to handle?
  • Error likelihood: What’s the probability that a resource will be temporarily unavailable or that a message will contain data that can’t be processed correctly and how soon such a problem needs to be resolved? I.e. can we wait to another day or shall we get going as soon as the resource is up again? This will tell us how often we need to retry and whether a manual handling of an issue is sufficient.
  • Support for error handling/retrial logic
  • Ease of use/development/maintenance
  • Performance: We need to handle all the incoming messages and to have minimal negative impact on the  performance of the target system
  • Speed of processing of the incoming messages (immediate vs. once or few times per day)
  • Integration with our operations monitoring (logging, our Operations Dashboard webapp)
  • The problems to deal with

    There are three types of problems that can occur:

  • A failure to communicate with MQ, for instance because a network connection got interrupted
  • Inability to process a message due to a resource (a DB or a WS) being temporary unavailable
  • A poison (invalid) message (wrong data type, unexpected content) leading to an exception during its processing
  • The two approaches Approach 1: A Message-Driven Bean (MDB)

    A MDB is hosted by an application server that does a lot of work on behalf of the bean (such as transaction and concurrency management) thus simplifying its development and configuration. It may be as simple as writing

    @javax.ejb.MessageDrivenpublic class SimpleMessageBean implements javax.jms.MessageListener { public void onMessage(javax.jms.Message inMessage) { final javax.jms.TextMessage msg = (javax.jms.TextMessage) inMessage; final String msgBody = msg.getText(); // handle the msgBody ... }}

    and configuring the ActivationSpecification for the MDB in JNDI via the app. server’s administration UI.

    The question is, of course, how well it can handle poison messages and retrial when resources are temporarily unavailable.

    MDB error handling and configuration in Websphere 7

    Let’s have a look how Websphere deals with various kinds of errors related to MDBs and how we do configure a MDB in this application server, especially with regard to error handling.

    MDB error handling in Websphere

    What happens when an error occurs?

    Normally an Application Server starts an MQ transaction before it invokes a MDB and it either commits it when the MDB finishes or rolls it back when it throws an exception. If the transaction succeeds then the message is removed from the MDB’s queue otherwise it will be returned there and processed again in the future. This is the default behavior corresponding to configuring container-managed transactions (tx) with the type of ‘required’. Notice that also DB operations can participate in this transaction and thus be committed/rolled back as well, which might be useful.

  • In the case of an MQ communication/connection failure, WAS logs the exception and retries the connection later based on its configuration. It’s also possible to set an ExceptionListener that would be called with the exception as a parameter in such a case.
  • In the case of an exception during message processing (or due to a manual setRollbackOnly invocation) the current transaction is rolled back, the message is put back to the queue and the MDB is restarted. When the queue is re-checked, the message is found again and passed to another MDB. If the cause of the problem persists, this will fail again – and so on.
  • We have two ways how to deal with a failed message:

  • Remove the message from the queue either by discarding it or by moving it to the queue’s “back-out queue”. This is appropriate when the message itself is the problem (e.g. contains data inconsistent with the DB …).
  • Stop processing messages from the queue (pause the Activation Specification) and restart it later when the problem is resolved. This is appropriate when a necessary resource is temporarily unavailable.
  • Messaging provider and JMS resources configuration related to error handling

    We will use JCA 1.5 Activation Specification (and not Listener Ports that are deprecated since WAS 7) with Websphere MQ as the provider, which limits our configuration options to those described below.

  • Disabling (temporarily) the whole queue, more exactly shutting down the MDB
  • “Number of sequential delivery failures before suspending endpoint” – on an MQ Activation Specification
  • “Stop endpoint if message delivery fails” – if true, message delivery suspended when the Number of sequential delivery failures… exceeded
  • Removing problematic messages (this is done by Websphere MQ itself, not WAS)
  • “Backout threshold” (BOTHRESH; a property of a queue, configured via MQ) specifies the maximum number of times a message can be put onto a queue before it is moved to the specified backout requeue queue.  Default: 0 or unset?! => never re-delivered
  • “Backout requeue queue” (BOQNAME; a property of a queue, configured via MQ) – the queue where to put the failed messages; default: SYSTEM.DEAD.LETTER.QUEUE
  • WARNING: This seems to apply only to a queue, not to a topic. But underneath topics use (likely dynamic) queues anyway so it should be possible somehow.
  • Other related settings
  • Interesting resources:

    Design of the MDB approach Error handling design

    The main problem with the MDB approach is that it doesn’t support retrying an operation after a delay (either for a single failing message or for the whole queue, if a resource is temporarily unavailable). There are some workarounds, but not very nice.

  • For a single message I couldn’t find a way to implement retrials after some, preferably increasing, delay; the only thing we can do is to retry it few times with the default Websphere’s delay, which seems to be 5s, and if it still doesn’t succeed then move it into a special queue that would be processed manually while perhaps also sending an email notification.
  • If there is some global problem, such as an unavailable resource, indicated by several consecutive failures of one or more messages (depending on the content of the queue), we could let WAS stop the MDB and re-enable it later either automatically after a delay or manually when the problem gets fixed.
  • MDB design
  • When resource unavailability is detected, let WAS stop the MDB automatically via the setting “Number of sequential delivery failures before suspending endpoint”. It will need to be re-enabled either manually or automatically.
  • Manual re-activation of the MDB: We have to somehow detect that the MDB was disabled (the only option is perhaps by watching the log), find out why it failed, and re-enable it via the Websphere Administration Console.
  • Automated re-activation: Implement a scheduled stateless EJB, which re-enables the MDB after few tens of minutes – preferably do this few times with increasing delay, if still failing, give up and notify an admin.
  • When there is a poison message, move it to the backout queue and notify somebody to handle it (e.g. via email)
  • If the queue contains only one message there is no generic way how to find out whether the problem is within the message or in some resource, the MDB would need to find this out and communicate it. If there are multiple messages and only one fails, we know it’s a poison message and it could be automatically removed by means of the “Backout threshold”. (Beware of the interaction between the message’s redelivery count/backout threashold and the “Number of sequential delivery failures…” – the letter is reset when either a message processing succeeds or when the MDB is stopped/restarted.)
  • (Perhaps we could use JMS selectors on JMS header properties (e.g. JMSRedeliveredto, JMSXDeliveryCount) but the possibilities are rather limited because both the selector query and the properties are static (e.g. something like MyRetryTime >= now() isn’t possible). Note: MQ V7 has a major rewrite of the selectors support and their handling was moved from the Java client directly to the queue manager.)
  • MDB approach evaluation Key MDB issues
  • Permissions to perform a WAS administration operation required.
  • Difficult to distinguish a poison message from a resource outage without additional logic when the queue contains only one element.
  • But see the batch job design below, which also requires to be able to distinguish these two types of problems.
  • Inefficient determination of MDB’s status for the delay reactivation logic: either polling its status regularly or watching the log with many unrelated messages that can’t be filtered out.
  • Key MDB advantages and disadvantages
  • Advantages
  • The data is processed and reaches the destination system soon after it is published
  • Key characteristics are configurable via UI (Number of sequential delivery failures, Backout threshold, MQ connection data, MQ security/SSL, processing concurrency, DataSource configuration/injection, …). Actually this is also a disadvantage due to needing an admin, see below
  • Logging configurable at the runtime (Java logging, levels can be set in WAS console)
  • Disadvantages
  • Any configuration requires a WAS administrator and thus lot of time due to the IBM bureaucracy and ceremony
  • Difficult to collect and communicate statistics for our Operations Dashboard because (a) there are frequent fine-grained changes instead of 1/day batch changes and (b) there is no support for the Job logging framework of ours (a possible but laborious solution is to gather statistics in an instance variable and log them in regular intervals into the job tables using JDBC and some code extracted from the job framework)
  • Necessary to somehow configure the reactivation EJB (the reactivation delay, number of attempts before giving up)
  • MDB design questions:

  • Do we need automated reactivation of a disabled MDB? Perhaps not if: (1) a resource outage happens rarely and/or (2) the administration team spots this automatically and can handle it automatically without any bureaucracy and consumption of our resources.
  • MDB resources

    Essential docs

    Other (not all docs available for our version, namely MQ v6 and WAs v7)

    Approach 2: A batch job checking MQ regularly

    A batch job is a command-line application that is regularly, for example once a day, run by cron and actively scans its incoming queue/topic for new messages and processes them all at once. All the JMS communication and management and configuration must be implemented from scratch. (Though utilities such as Spring JMS template may simplify it.)

    Job error handling and configuration Error handling

    The problems and ways to deal with errors are the same as when running in an application server, only we have to do everything ourselves. That means we need to manually start a transaction, catch exception and commit/roll back and configure the topic/queue for poison messages.

    We would need to implement a problem cause detection logic to distinguish whether there is a temporary resource outage or whether there is a problem with the message itself (either incorrect data type or data inconsistent with the target DB ). There is no other good way to deal with these distinct kinds of problems without really knowing which of them it is.

    We would deal with the problems as follows:

  • For a resource outage, retry few times with an increasing delay, then quit and postpone the processing till the next scheduled execution
  • For a poison message, move it to the backout queue and notify an administrator
  • JMS configuration in a batch job

    We have two ways to configure the JMS resources (a Topic and a (Topic)ConnectionFactory) and their options related to error handling:

  • Use MQ provider-specific APIs to create the objects and configure them. See this JMS + MQ API example.
  • Configure the provider-specific resources in JNDI and use only the standardized JNDI and JMS APIs. This is very easy with Sun’s filesystem-based JNDI provider (fscontext.jar and providerutil.jar) and vendor-supplied tools for generating the JNDI .bindings file for existing JMS resources . In the case of MQ you can do it in the MQ Explorer GUI or with the command-line utility JMSAdmin (a JMSAdmin example, another one).
  • You can create the JNDI configuration via the MQ Explorer wizards – after having added a new JNDI “context” using fscontext and a local directory – either by first creating the JMS resource and then letting the wizard generate an MQ resources for it and adjusting it as needed:

    Or by creating the JMS resource from an existing MQ resource:

    Provided that the FsContext configuration file .bindings produced by JMSAdmin/MQ Explorer is in the folder /etc/mqJndiconfig, we would connect to the MQ as follows:

    final Hashtable<String, String> env = new Hashtable<String, String>();env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.fscontext.RefFSContextFactory");env.put(Context.PROVIDER_URL, "file:/etc/mqJndiconfig");final InitialContext context = new InitialContext(env);ConnectionFactory qcf = (javax.jms.ConnectionFactory) context.lookup("MyConnectionFactory"); // Note: I set the channel property MCAUSER so it actually isn't necessary to supply credentials below:final Connection connection = qcf.createConnection("anna", "password ignored");// Client ID is necessary for a durable subscr.// We could alternatively set in on the ConnectionFactory - the CLIENTID propertyconnection.setClientID("MyCoolApplication");final Session session = connection.createSession(true, -1); // the param 2 is ignored for durable subscr.final Topic destination = (Topic) context.lookup(JNDI_PREFIX + TOPIC);final MessageConsumer receiver = subscribe(session, destination);try {connection.start();} catch (javax.jms.JMSException e) {throw new RuntimeException("Failed to start the JMS connection", e);}

    We would then read the messages via:

    while ((msg= receiver.receiveNoWait()) != null) {handleMessage(msg);}

    The dependencies include jms.jar, fscontext.jar and providerutil.jar. You can find them either in the WMQ installation or on the web.

    You may want to have a look at Writing a simple publish/subscribe application connecting through WebSphere MQ in WMQ help, which discusses some of the code above in more detail.

    Job design
  • Set a reasonable backout threshold and a suitable backout queue on the queue used by the Topic so that problematic messages are removed automatically after few failed attempts
  • Some monitoring of the backout queue would be necessary. If the MQ infrastructure doesn’t provide it then we can implement another MQ/JMS reader that would send an email when there are some new messages in the queue.
  • Regarding the type of the topic queue:
  • Either we can use the shared JMS queue (SYSTEM.JMS.D.SUBSCRIBER.QUEUE) for the topic
  • Or we can use a non-shared queue unique for our application, which would be actually better and more aligned with IBM standards. It’s achieved by setting a broker durable subscription queue pattern in the form “SYSTEM.JMS.D..*” (notice the trailing *) on the JMS ConnectionFactory when defining it in JNDI or in the Java code. Upon the first connection a permanent dynamic queue is generated for the client. We can then set the backout options on it (or the administrators may define a model queue for these dynamic queues with this setting already applied).
  • Read and process each message in a new MQ transaction so that if the processing fails it will be put back into the queue (and its delivery count will be increased, thus making it perhaps eligible for the backout queue)
  • Batch job approach evaluation
  • Advantages
  • Simple implementation offlexibledelayed retrials – upon a resource outage, end the job and try again during the next scheduled run or, perhaps, retry first after a manual delay (Thread.sleep(); beware connection timeouts).
  • Simple integration into our monitoring/logging framework incl. the Operations Dashboard.
  • Disadvantages
  • More coding to set up/clean the resources and handle errors, which is not trivial, and thus also more bug prone.
  • Concurrent processing of the messages would be considerably more difficult to implement correctly if possible at all (if MQ JMS does implement the necessary optional methods). We would need to use the advanced methods targeted at app. server vendors – there is a non-MQ example of a multithreaded (non-durable subscription) consumer. Hopefully it could be modified for a durable one using Connection.createDurableConnectionConsumer with the same simple implementation of ServerSessionPool.
  • Impl. details: The “pool” would always create a new custom ServerSession implementation. instance, whose getSession() would simply create a new transacted TopicSession, set its MessageListener, and run the session in a new Thread when start() called. Notice that (Topic)Session implements Runnable, whose run() invokes the provided listener sequentially for available messages. The listener would process a message and call commit/rollback on its owning session (see this transactional listener example).
  • Important: Handling of failed messages would need to be considered carefully as returning a message to the queue would lead to its immediate re-processing and likely rejection by one of the other threads, exceeding its backout treshold in a few seconds and thus subverting the delayed retrial processing. On the other hand, as mentioned above, we should anyway be able to distinguish resource outage, in which case we would stop processing immediately, and a problematic message, which would anyway end up in the backout queue so this is perhaps not a real issue.
  • Note: When using MessageListeners, it’s important to set an ExceptionListener on the connection because some errors can only be communicated this way.
  • Summary and conclusion

    The version and fixpack level of WMQ/WAS is very important.

    Both the approaches have some pros and cons and it depends on the requirements and their priority which one would be more suitable.

    MDB: It’s more difficult to implement delayed retrial if it is required – it may be implemented via a scheduled EJB automatically re-enabling the MDB stopped by WAS after a number of failures (one issue is that we’d need WAS admin rights for the EJB to do that; another is performance due to the need to either monitor logs or check the MDB’s status regularly). On the other hand, concurrent processing is available out of the box and also implementing a bean notifying about problematic messages in the backout queue is simpler thanks to the injection of the mail API resources. This solution may thus require some JMX and Java EE (scheduled EJB) magic and there may be unexpected problems with that.

    JOB: Concurrency: it’s more difficult to implement processing of the messages in parallel, there is even a slight chance that it’s impossible. Also  more coding is required and thus there will be more bugs. On the other hand we can implement delayed retrials as we want. Thus if concurrent processing isn’t critical while the automatic delayed retrial may be then this would be the best approach.

     

    From http://theholyjava.wordpress.com/2010/09/13/implementing-retrial-with-a-mdb-or-an-mq-batch-job-was-7-mq-6/



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    IBM 000-298 Exam (IBM WebSphere Business Integration Message Broker V5 System Administration) Detailed Information



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