Weblogic Authors: Yeshim Deniz, Elizabeth White, Michael Meiner, Michael Bushong, Avi Rosenthal

Related Topics: Weblogic

Weblogic: Article

JMSML: XML-Based Mark-Up Language

JMSML: XML-Based Mark-Up Language

JMSML is a mark-up language designed and developed to make Java Message Service (JMS) and Java Management Extensions (JMX) programming easy by hiding all the JMS and JMX Java API complexity behind a few easy-to-use XML tags.

JMS Applications: A Background
A typical JMS application development process involves configuring and managing the JMS server components, like JMSConnectionFactory and JMSDestination, on the JMS Provider application server, writing JMS application clients that will make use of these administered server-side objects to do the Java messaging.

JMS application clients are written in Java using the JMS API, and are categorized into two types of programs:

  • Producers: For creating various JMS Message types (like Text, XML, Object, Stream, Bytes) and sending them to the JMS destinations (Queues and Topics)
  • Consumers: For receiving messages from the JMS destinations (Queues and Topics), both synchronously and asynchronously

    The JMS API enables both producers and consumers to utilize various qualities of services (QOS) that are provided by the underlying JMS implementation and by the JMS providers (like transaction and acknowledgment).

    Writing producers and consumers involves following some specific steps, in a specific order, while using the JMS API. This process has to be repeated for every single producer and consumer that is written to do Java messaging.

    The JMSML Approach
    The JMSML approach to writing JMS application clients is accomplished without writing Java code. Instead, JMS API complexity is abstracted into a few XML tags that are easy to use and remember. Using JMSML, you can create simple reusable JMS components, like a "Sender", "Receiver", "Publisher", and "Subscriber". In addition, JMSML makes administration of a JMS server very simple by using XML tags, thus eliminating the JMX Java API complexity. JMSML supports all the JMX operations that are needed to do dynamic configuration, management, and runtime monitoring of a JMS server.

    Finally, JMSML simplifies testing by automating verification of operation and monitoring output (see Figure 1).

    What Does a Java JMS Program Look Like?
    Listing 1 shows a Java program using the JMS API to send a text message, "Hello World", to a JMS queue named "exampleQueue", using a JMSConnectionFactory named "QueueConnectionFactory" via a nontransacted, autoacknowledge JMSSession.

    What Does a JMSML Program Look Like?
    The following 9 lines of a similar XML program, QueueSend.xml, are equivalent to the 74 lines of QueueSend.java in Listing 1. Note that all other Java JMS API details are taken care by JMSML by means of having default attribute values.

    1 <?xml version="1.0" encoding="UTF-8"?>
    2 <!DOCTYPE jmsml PUBLIC "-//BEA Systems Inc//DTD JMSML Version 1.0 JMSML//EN"
    3 <jmsml>
    4 <operation Class="message" Type="Text" Name="MyQueueSender"
    5 Factory="QueueConnectionFactory"
    6 Queue="exampleQueue"
    7 Body="Hello World"
    8 >Send</operation>
    9 </jmsml>

    In this case, JMSML will create QueueSender with a nontransacted and autoacknowledge JMSSession. Once this operation is executed, then the "MyQueueSender" object is still available for reuse later, until the end of the program execution. That is, "MyQueueSender" can be reused to send different messages to different queues.

    JMSML Applications
    From the previous code comparison, you can easily figure out that JMSML is simple to learn and use yet very powerful in terms of its functionality. JMSML can be used to do the following tasks in the WebLogic JMS subsystem.

  • As an administration and monitoring tool for the WebLogic JMS subsystem
  • As a prototyping tool for WebLogic JMS applications
  • As a testing tool for the WebLogic JMS Subsystem

    Using JMSML as a Testing Tool
    Once JMS testing scenarios are identified, they can easily be translated into JMSML operations and then grouped as testing scenarios using <scenario> with the Verify attribute set to "false". This test program can be executed using one of the JMSML execution models. After successful execution, an output file is created with the same name as the input JMSML program and with a .out extension. It is verified manually for correctness and then saved as a benchmark file (again in the same name as the input JMSML program but with a .bmk extension).

    Later, whenever the same JMSML program is executed, with the Verify attribute of the <scenario> element set to "true", JMSML treats that input JMSML program as a test, and the output file is automatically compared with the corresponding benchmark file for test verification. If the benchmark and the output file matches, then the test is declared as passed. Otherwise, it will be declared as failed.

    Test the dynamic creation, management, and monitoring of the JMS administered objects and the message send, receive features of JMS.

    Testing Scenario: Create a JMSServer named "Warehouse" with all the default attribute values and deploy it on a WebLogic Server instance named "examplesServer". Create a queue destination named "orderqueue" with all the attribute values explicitly defined, add it to the JMSServer named "Warehouse", into JNDI as "jms.queue.order", send/receive messages to this queue, and at the end delete both the queue "orderqueue" destination and the "Warehouse" JMSServer.

    Listing 2 is the JMSML representation of the Testing Scenario defined above.

    Once a JMSML program is written, it can be run against a WebLogic Server instance. Currently, JMSML provides three different ways to execute a program they are;
    1.   Stand-alone commandline client
    2.   Web browser interface for remote execution
    3.   IDE (prototype)

    java com.bea.jmsml.commandline.JMSMLClient \
    -protocol t3 \
    -host localhost \
    -port 7001 \
    -username weblogic \
    -password weblogic \
    -filename jmstest.xml

    This command line assumes the following about the execution environment:

  • An instance of WebLogic Server named "examplesServer" is running on "localhost" and is listening on the port '7001" with the "t3" protocol enabled.
  • WebLogic security is set up such that a user named "weblogic" with a password of "weblogic" is configured with permissions for creating and accessing JMS server components.
  • A valid JMS connection factory is deployed on the "examplesServer" and is bound to JNDI as "weblogic.examples.jms.QueueConnectionFactory".
  • The test program shown in Listing 3 is saved in the current directory along with the "jmsml.dtd" file.

    After the successful execution of the command, the following message will be printed out to the stdout.

    *** jmstest processed *** \n***
    Please see ./jmstest.out for the results ***

    At this time, an output file named "jmstest.out" will exist in the current directory, containing all the operations execution results, as shown in Listing 3. In this output sample, the contents are color-coded to identify the operation category, as follows:

  • Brown: JMS Receive (successful Send has no output in normal mode)
  • Red: JMX Add, Remove
  • Blue: JMX List (config information)
  • Green: JMX List (runtime statistics)

    Once this output is manually verified for correctness, you can easily make it a valid, reusable WebLogic JMS test case by doing two things:
    1.   Rename the "jmstest.out" file to "jmstest.bmk"
    2.   Edit the "jmstest.xml" file by changing the Verify attribute value to "true" in the <scenario> element.

    The next time the same command line is executed, JMSML treats the "jmstest.xml" as a test case and prints out the test pass/fail result to the stdout.

    That's it! Without writing a Java program, we have quickly written a complete test case for BEA WebLogic JMS and JMX features using JMSML. This is a working example and is packaged with JMSML download.

    The JMSML product binary, along with the technical white paper, can be downloaded from: http://dev2dev.bea.com/resourcelibrary/ whitepapers/JMSML_WhitePaper.jsp

  • More Stories By Kathiravan Sengodan

    Kathiravan Sengodan has more than 11 years of experience in the software industry and is currently a sofware engineer on the BEA WebLogic JMS/Messaging team.

    Comments (0)

    Share your thoughts on this story.

    Add your comment
    You must be signed in to add a comment. Sign-in | Register

    In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.

    @ThingsExpo Stories
    SYS-CON Events announced today that Yuasa System will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Yuasa System is introducing a multi-purpose endurance testing system for flexible displays, OLED devices, flexible substrates, flat cables, and films in smartphones, wearables, automobiles, and healthcare.
    SYS-CON Events announced today that Taica will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Taica manufacturers Alpha-GEL brand silicone components and materials, which maintain outstanding performance over a wide temperature range -40C to +200C. For more information, visit http://www.taica.co.jp/english/.
    Enterprises have taken advantage of IoT to achieve important revenue and cost advantages. What is less apparent is how incumbent enterprises operating at scale have, following success with IoT, built analytic, operations management and software development capabilities – ranging from autonomous vehicles to manageable robotics installations. They have embraced these capabilities as if they were Silicon Valley startups. As a result, many firms employ new business models that place enormous impor...
    SYS-CON Events announced today that SourceForge has been named “Media Sponsor” of SYS-CON's 21st International Cloud Expo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. SourceForge is the largest, most trusted destination for Open Source Software development, collaboration, discovery and download on the web serving over 32 million viewers, 150 million downloads and over 460,000 active development projects each and every month.
    SYS-CON Events announced today that Dasher Technologies will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Dasher Technologies, Inc. ® is a premier IT solution provider that delivers expert technical resources along with trusted account executives to architect and deliver complete IT solutions and services to help our clients execute their goals, plans and objectives. Since 1999, we'v...
    As popularity of the smart home is growing and continues to go mainstream, technological factors play a greater role. The IoT protocol houses the interoperability battery consumption, security, and configuration of a smart home device, and it can be difficult for companies to choose the right kind for their product. For both DIY and professionally installed smart homes, developers need to consider each of these elements for their product to be successful in the market and current smart homes.
    SYS-CON Events announced today that MIRAI Inc. will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. MIRAI Inc. are IT consultants from the public sector whose mission is to solve social issues by technology and innovation and to create a meaningful future for people.
    SYS-CON Events announced today that Massive Networks, that helps your business operate seamlessly with fast, reliable, and secure internet and network solutions, has been named "Exhibitor" of SYS-CON's 21st International Cloud Expo ®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. As a premier telecommunications provider, Massive Networks is headquartered out of Louisville, Colorado. With years of experience under their belt, their team of...
    SYS-CON Events announced today that TidalScale, a leading provider of systems and services, will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. TidalScale has been involved in shaping the computing landscape. They've designed, developed and deployed some of the most important and successful systems and services in the history of the computing industry - internet, Ethernet, operating s...
    Widespread fragmentation is stalling the growth of the IIoT and making it difficult for partners to work together. The number of software platforms, apps, hardware and connectivity standards is creating paralysis among businesses that are afraid of being locked into a solution. EdgeX Foundry is unifying the community around a common IoT edge framework and an ecosystem of interoperable components.
    Coca-Cola’s Google powered digital signage system lays the groundwork for a more valuable connection between Coke and its customers. Digital signs pair software with high-resolution displays so that a message can be changed instantly based on what the operator wants to communicate or sell. In their Day 3 Keynote at 21st Cloud Expo, Greg Chambers, Global Group Director, Digital Innovation, Coca-Cola, and Vidya Nagarajan, a Senior Product Manager at Google, will discuss how from store operations...
    In a recent survey, Sumo Logic surveyed 1,500 customers who employ cloud services such as Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP). According to the survey, a quarter of the respondents have already deployed Docker containers and nearly as many (23 percent) are employing the AWS Lambda serverless computing framework. It’s clear: serverless is here to stay. The adoption does come with some needed changes, within both application development and operations. Tha...
    SYS-CON Events announced today that IBM has been named “Diamond Sponsor” of SYS-CON's 21st Cloud Expo, which will take place on October 31 through November 2nd 2017 at the Santa Clara Convention Center in Santa Clara, California.
    In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, will lead you through the exciting evolution of the cloud. He'll look at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering ...
    Infoblox delivers Actionable Network Intelligence to enterprise, government, and service provider customers around the world. They are the industry leader in DNS, DHCP, and IP address management, the category known as DDI. We empower thousands of organizations to control and secure their networks from the core-enabling them to increase efficiency and visibility, improve customer service, and meet compliance requirements.
    Join IBM November 1 at 21st Cloud Expo at the Santa Clara Convention Center in Santa Clara, CA, and learn how IBM Watson can bring cognitive services and AI to intelligent, unmanned systems. Cognitive analysis impacts today’s systems with unparalleled ability that were previously available only to manned, back-end operations. Thanks to cloud processing, IBM Watson can bring cognitive services and AI to intelligent, unmanned systems. Imagine a robot vacuum that becomes your personal assistant tha...
    With major technology companies and startups seriously embracing Cloud strategies, now is the perfect time to attend 21st Cloud Expo October 31 - November 2, 2017, at the Santa Clara Convention Center, CA, and June 12-14, 2018, at the Javits Center in New York City, NY, and learn what is going on, contribute to the discussions, and ensure that your enterprise is on the right path to Digital Transformation.
    Recently, REAN Cloud built a digital concierge for a North Carolina hospital that had observed that most patient call button questions were repetitive. In addition, the paper-based process used to measure patient health metrics was laborious, not in real-time and sometimes error-prone. In their session at 21st Cloud Expo, Sean Finnerty, Executive Director, Practice Lead, Health Care & Life Science at REAN Cloud, and Dr. S.P.T. Krishnan, Principal Architect at REAN Cloud, will discuss how they b...
    SYS-CON Events announced today that mruby Forum will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. mruby is the lightweight implementation of the Ruby language. We introduce mruby and the mruby IoT framework that enhances development productivity. For more information, visit http://forum.mruby.org/.
    Digital transformation is changing the face of business. The IDC predicts that enterprises will commit to a massive new scale of digital transformation, to stake out leadership positions in the "digital transformation economy." Accordingly, attendees at the upcoming Cloud Expo | @ThingsExpo at the Santa Clara Convention Center in Santa Clara, CA, Oct 31-Nov 2, will find fresh new content in a new track called Enterprise Cloud & Digital Transformation.