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
    "There's plenty of bandwidth out there but it's never in the right place. So what Cedexis does is uses data to work out the best pathways to get data from the origin to the person who wants to get it," explained Simon Jones, Evangelist and Head of Marketing at Cedexis, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
    In his session at 21st Cloud Expo, Carl J. Levine, Senior Technical Evangelist for NS1, will objectively discuss how DNS is used to solve Digital Transformation challenges in large SaaS applications, CDNs, AdTech platforms, and other demanding use cases. Carl J. Levine is the Senior Technical Evangelist for NS1. A veteran of the Internet Infrastructure space, he has over a decade of experience with startups, networking protocols and Internet infrastructure, combined with the unique ability to it...
    SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
    "MobiDev is a software development company and we do complex, custom software development for everybody from entrepreneurs to large enterprises," explained Alan Winters, U.S. Head of Business Development at MobiDev, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
    SYS-CON Events announced today that Telecom Reseller has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. Telecom Reseller reports on Unified Communications, UCaaS, BPaaS for enterprise and SMBs. They report extensively on both customer premises based solutions such as IP-PBX as well as cloud based and hosted platforms.
    WebRTC is great technology to build your own communication tools. It will be even more exciting experience it with advanced devices, such as a 360 Camera, 360 microphone, and a depth sensor camera. In his session at @ThingsExpo, Masashi Ganeko, a manager at INFOCOM Corporation, introduced two experimental projects from his team and what they learned from them. "Shotoku Tamago" uses the robot audition software HARK to track speakers in 360 video of a remote party. "Virtual Teleport" uses a multip...
    Gemini is Yahoo’s native and search advertising platform. To ensure the quality of a complex distributed system that spans multiple products and components and across various desktop websites and mobile app and web experiences – both Yahoo owned and operated and third-party syndication (supply), with complex interaction with more than a billion users and numerous advertisers globally (demand) – it becomes imperative to automate a set of end-to-end tests 24x7 to detect bugs and regression. In th...
    "Space Monkey by Vivent Smart Home is a product that is a distributed cloud-based edge storage network. Vivent Smart Home, our parent company, is a smart home provider that places a lot of hard drives across homes in North America," explained JT Olds, Director of Engineering, and Brandon Crowfeather, Product Manager, at Vivint Smart Home, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
    "IBM is really all in on blockchain. We take a look at sort of the history of blockchain ledger technologies. It started out with bitcoin, Ethereum, and IBM evaluated these particular blockchain technologies and found they were anonymous and permissionless and that many companies were looking for permissioned blockchain," stated René Bostic, Technical VP of the IBM Cloud Unit in North America, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Conventi...
    "Cloud Academy is an enterprise training platform for the cloud, specifically public clouds. We offer guided learning experiences on AWS, Azure, Google Cloud and all the surrounding methodologies and technologies that you need to know and your teams need to know in order to leverage the full benefits of the cloud," explained Alex Brower, VP of Marketing at Cloud Academy, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clar...
    It is of utmost importance for the future success of WebRTC to ensure that interoperability is operational between web browsers and any WebRTC-compliant client. To be guaranteed as operational and effective, interoperability must be tested extensively by establishing WebRTC data and media connections between different web browsers running on different devices and operating systems. In his session at WebRTC Summit at @ThingsExpo, Dr. Alex Gouaillard, CEO and Founder of CoSMo Software, presented ...
    A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, whic...
    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, discussed how from store operations and ...
    SYS-CON Events announced today that Evatronix 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. Evatronix SA offers comprehensive solutions in the design and implementation of electronic systems, in CAD / CAM deployment, and also is a designer and manufacturer of advanced 3D scanners for professional applications.
    Leading companies, from the Global Fortune 500 to the smallest companies, are adopting hybrid cloud as the path to business advantage. Hybrid cloud depends on cloud services and on-premises infrastructure working in unison. Successful implementations require new levels of data mobility, enabled by an automated and seamless flow across on-premises and cloud resources. In his general session at 21st Cloud Expo, Greg Tevis, an IBM Storage Software Technical Strategist and Customer Solution Architec...
    To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. In his session at @BigDataExpo, Jack Norris, Senior Vice President, Data and Applications at MapR Technologies, reviewed best practices to ...
    An increasing number of companies are creating products that combine data with analytical capabilities. Running interactive queries on Big Data requires complex architectures to store and query data effectively, typically involving data streams, an choosing efficient file format/database and multiple independent systems that are tied together through custom-engineered pipelines. In his session at @BigDataExpo at @ThingsExpo, Tomer Levi, a senior software engineer at Intel’s Advanced Analytics gr...
    When talking IoT we often focus on the devices, the sensors, the hardware itself. The new smart appliances, the new smart or self-driving cars (which are amalgamations of many ‘things’). When we are looking at the world of IoT, we should take a step back, look at the big picture. What value are these devices providing? IoT is not about the devices, it’s about the data consumed and generated. The devices are tools, mechanisms, conduits. In his session at Internet of Things at Cloud Expo | DXWor...
    Everything run by electricity will eventually be connected to the Internet. Get ahead of the Internet of Things revolution. In his session at @ThingsExpo, Akvelon expert and IoT industry leader Sergey Grebnov provided an educational dive into the world of managing your home, workplace and all the devices they contain with the power of machine-based AI and intelligent Bot services for a completely streamlined experience.
    SYS-CON Events announced today that Synametrics Technologies will exhibit at SYS-CON's 22nd International Cloud Expo®, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. Synametrics Technologies is a privately held company based in Plainsboro, New Jersey that has been providing solutions for the developer community since 1997. Based on the success of its initial product offerings such as WinSQL, Xeams, SynaMan and Syncrify, Synametrics continues to create and hone inn...