JBoss ESB 4.0 GA

Getting Started With JBoss ESB

JBESB-GS-2/1/07

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JBoss ESB 4.0 GA

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Contents

About This Guide

What This Guide Contains

The goal of this document is assist you in getting up and running with test applications on JBossESB as quickly as possible.

Audience

This guide is anyone who is responsible for using JBoss ESB 4.0 GA installations and wants to know how to install and use it.

Prerequisites

None.

Organization

This guide contains the following chapter:

1. Chapter 1, Installation: This chapter reviews prerequisites (software needed to operate JBossESB), downloading JBossESB, and building JbossESB.

2. Chapter 2, Trailblazer: A quick summary of the trailblazer example.

Documentation Conventions

The following conventions are used in this guide:

Table 1 Formatting Conventions

Additional Documentation

In addition to this guide, the following guides are available in the JBoss ESB 4.0 GA documentation set:

1. JBoss ESB 4.0 GA Trailblazer Guide: Provides guidance for using the trailblazer example.

2. JBoss ESB 4.0 GA Administration Guide: How to manage the ESB.

3. JBoss ESB 4.0 GA Programmers Guide: How to use JBossESB.

4. JBoss ESB 4.0 GA Release Notes: Information on the differences between this release and previous releases.

5. JBoss ESB 4.0 GA Services Guides: Various documents related to the services available with the ESB.

Contacting Us

Questions or comments about JBoss ESB 4.0 GA should be directed to our support team.

Chapter 1

Getting Started

After downloading and expanding the JBoss ESB 4.0 Release Candidate distribution, you should have the following file structure.

|-- docs
|   |-- config
|   `-- services
|-- install
|   |-- conf
|   |-- data
|   |-- deploy
|   |-- jUDDI-registry
|   `-- message-store
|-- javadocs
|-- lib
|-- samples
|   |-- docs
|   |-- quickstarts
|   |   |-- helloworld
|   |   |-- helloworld_action
|   |   |-- helloworld_embedded_reg
|   |   |-- more_action
|   |   |-- simple_cbr
|   |   `-- simple_transformation
|   `-- trailblazer
|       |-- banks
|       |-- client
|       |-- docs
|       |-- esb
|       |-- loanbroker
|       `-- template
|-- tools
|   `-- console
`-- xml

The quickest way to get started using JBoss ESB is through running one of the quickstarts in the samples/quickstarts folder. This will also perform a basic validation of your system. Before doing this however, be sure to check that your system meets the following minimum requirements:

1. JDK 5 (v1.5.0_06 recommended)

2. Ant (v1.6.5 recommended)

3. JBoss Application Server v4.0.5

There are three ways to run the ESB. You can deploy it to JBossAS, to Tomcat, or run it in standalone mode. In any case you have to copy the 'deployment.properties-example' to 'deployment.properties, and you may have to edit the properties set in this file. This document assumes you have ant (1.6.5 or higher) and java5 installed on your machine, and that you have a fresh copy of jboss 4.0.x. So now go and download the JBossESB 4.0RC1 distribution from http://labs.jboss.com/portal/jbossesb/downloads

Deploy to JBossAS

1. Edit your version of the deployment.properties. Open this file and edit the following lines if needed:

   # application server root directory

org.jboss.esb.appserver.home=/jboss-4.0.5.GA

# the instance of jboss you are running (default)

org.jboss.esb.appserver.config=default

#the place where the jboss libraries can be found

# Note: You should not need to change this entry unless you altered

# the jbossesb distribution directory structure

org.jboss.esb.dist.lib=../lib

2. Run 'ant'. This will deploy the esb to your jboss AS instance. It copies the jbossesb.sar and jbossesb-dependencies.sar directories into your deploy directory.

3. You can deploy custom code (actions) by deploying the jar to the jbossesb.sar directory.

4. Start your appserver and see:

11:42:24,640 INFO [ConfigurationControllerService] starting message configuration controller with config file jbossesb.xml

11:42:24,671 INFO [ConfigurationController] loading configuration..

11:42:24,843 INFO [ParamFileRepository] Setting parameter repository root dir to [C:\cygwin\home\kstam\apps\jboss-4.0.4.GA\jbossesb\bin\.].

11:42:26,640 INFO [Generator] Serializing ESB Aware Listener 'ConfigTree' configuration to [C:\jboss-4.0.5.GA\server\default\conf\jbossesb-listener.xml].

11:42:26,656 INFO [Generator] Serializing ESB Gateway 'ConfigTree' configuration to [C:\jboss-4.0.5.GA\server\default\conf\jbossesb-gateway.xml].

11:42:26,656 INFO [ConfigurationController] Parameter reload completed.

11:42:26,687 INFO [ConfigurationController] Configuration Controller instance started.

11:42:27,078 INFO [ConnectionFactoryBindingService] Bound ConnectionManager 'jboss.jca:service=ConnectionFactoryBinding,name=JmsXA' to JNDI name 'java:JmsXA'

11:42:27,218 INFO [TomcatDeployer] deploy, ctxPath=/jmx-console, warUrl=.../deploy/jmx-console.war/

11:42:28,109 INFO [Server] JBoss (MX MicroKernel) [4.0.5.GA (build: CVSTag=Branch_4_0 date=200610162339)] Started in 32s:500ms

Deploy to Tomcat

1. Edit your version of the deployment.properties. Open this file and edit the following line if needed ######################################################################

# Tomcat

######################################################################

# jbossesb tomcat home directory

org.jboss.esb.tomcat.home=/apache-tomcat-5.5.20

1. Run 'ant tomcat'. This will deploy the esb to your tomcat instance. It creates a jbossesb.war deploy directory in your tomcat.home/webapps directory.

2. Follow the steps in the tomcat/README.txt if you do not yet have a juddi database. Note that the JBossAS deploy comes with a preconfigured hsqldb.

3. You can deploy custom code (actions) by deploying the jar to the tomcat.home/webapps/jbossesb/WEB-INF/lib directory

4. Start tomcat and see:

12:12:20,875 INFO [ParamFileRepository] Setting parameter repository root dir t

o [C:\apache-tomcat-5.5.20\bin\.].

12:12:21,546 INFO [Generator] Serializing ESB Aware Listener 'ConfigTree' confi

guration to [C:\apache-tomcat-5.5.20\conf\jbossesb-listener.xml].

12:12:21,578 INFO [Generator] Serializing ESB Gateway 'ConfigTree' configuratio

n to [C:\apache-tomcat-5.5.20\conf\jbossesb-gateway.xml].

12:12:21,578 INFO [ConfigurationController] Parameter reload completed.

12:12:21,593 INFO [ConfigurationController] Configuration Controller instance s

tarted.

Jan 30, 2007 12:12:22 PM org.apache.coyote.http11.Http11BaseProtocol start

INFO: Starting Coyote HTTP/1.1 on http-8080

Jan 30, 2007 12:12:22 PM org.apache.jk.common.ChannelSocket init

INFO: JK: ajp13 listening on /0.0.0.0:8009

Jan 30, 2007 12:12:22 PM org.apache.jk.server.JkMain start

INFO: Jk running ID=0 time=0/31 config=null

Jan 30, 2007 12:12:22 PM org.apache.catalina.storeconfig.StoreLoader load

INFO: Find registry server-registry.xml at classpath resource

Jan 30, 2007 12:12:22 PM org.apache.catalina.startup.Catalina start

INFO: Server startup in 2813 ms

Standalone

1. Edit your version of the deployment.properties. Open this file and edit the following line if needed

######################################################################

# Standalone launcher

######################################################################

# jbossesb standalone home directory

org.jboss.esb.standalone.home=/jbossesb-4.0.GA

2. Follow the steps in the launcher/README.txt if you do not yet have a juddi database. Note that the JBossAS deploy comes with a preconfigured hsqldb.

3. Run 'ant launcher'. This will create a /jbossesb-4.0.GA directory.

4. You can deploy custom code (actions), by deploying the jar to the /jbossesb-4.0.GA/lib directory

5. In the /jbossesb-4.0.GA/bin directory start the esb with either the run.sh or run.bat script and see:

Reading config from C:\jbossesb-4.0.GA\bin\..\bin\jbossesb.xml

INFO [ConfigurationController]: loading configuration..

INFO [ParamFileRepository]: Setting parameter repository root dir to [C:\jbosse

sb-4.0.GA\bin\.].

INFO [Generator]: Serializing ESB Aware Listener 'ConfigTree' configuration to

[C:\jbossesb-4.0.GA\bin\..\bin\jbossesb-listener.xml].

INFO [Generator]: Serializing ESB Gateway 'ConfigTree' configuration to [C:\jbo

ssesb-4.0.GA\bin\..\bin\jbossesb-gateway.xml].

INFO [ConfigurationController]: Parameter reload completed.

INFO [ConfigurationController]: Configuration Controller instance started.

INFO [StandAloneBootStrapper]: starting gateway listener with config file - C:\

jbossesb-4.0.GA\bin\..\bin\jbossesb-gateway.xml

INFO [GatewayListenerController]: No value specified for: endTime - Listener wi

ll run until parent container/process terminates.

INFO [StandAloneBootStrapper]: Listeners Ready

INFO [GatewayListenerController]: Reloading parameters ________________________

_____________________________

INFO [GatewayListenerController]: No value specified for: endTime - Listener wi

ll run until parent container/process terminates.

In any case you will see 2 'new' configuration file being generated right next to the jbossesb.xml. They are the :jbossesb-listener.xml and jbossesb-gateway.xml. These represent the configuration as it will be consumed by the esb engine, which where generated from the jbossesb.xml file. There should be no need for you to interact with the generated file. You can add xml fragments in to the jbossesb.xml and when the controller reloads your listeners and gateways come up. So try pasting in xml from the Hello World config sample. Note that if you have a xml editor it should give you auto-complete options to help you creating the configuration xml. As you will do more Quickstarts you will be deploying custom actions (java code) along with your configuration.

The Hello World QuickStart

This QuickStart allows you get up and running with JBoss ESB, out of the box. It is located in the distribution under samples/quickstarts/helloworld.

To run this QuickStart:

1. Copy samples/quickstarts/esb-quickstart-service.xml to your JBoss Application Server (/jboss-4.0.5.GA/server/default/deploy). This will bring up all the JMS Queues you need to run the quickstarts. Note that the ESB can interact with any JMS provider, however it does not ship with one. So our examples use JBossMQ, which is the default provider in JbossAS. Note that we have also tested MQSeries and ActiveMQ.

2. Update the “jbosshome.dir” property setting in samples/quickstarts/quickstarts.properties to reference location of your JBoss Application Server.

3. Start you JBoss Application Server.

4. From a command terminal window (“Window1”), change directory into the samples/quickstarts/helloworld directory.

5. In Window1, type “ant”.

6. This will start the ESB Message “Listeners”. Wait for “**Listener Ready**” to appear on the terminal window. The ESB is now running!

7. Open a 2^nd command terminal window (“Window2”) and change director to samples/quickstarts/helloworld again.

8. In Window2, type “ant runtest”.

9. Switch back to Window1. You should soon see a “Hello World” message appear in the terminal window.

10. That's it! The QuickStart ran successfully. Your environment is properly configured for JBoss ESB.

Components of the QuickStart

The following diagram illustrates the sequence of events that take place in this QuickStart. It touches on a number of the key concepts within JBoss ESB¹.

Window1 shows each of the main “ESB” components used in this sample:

1. Service Registry: This is a JAXR Registry implementation. In this QuickStart, the registry is using an embedded Datastore as the Service repository (Hypersonic). See docs/services/RegistryConfiguration.pdf. For more details on the Registry Service.

2. JMS Gateway Listener: A “Gateway Listener” is one of the key architectural components within JBoss ESB. This listener type is, as its name would suggest, the gateway to the ESB from endpoints outside the domain of the ESB. In this case, we're using a JMS Gateway.

3. The ESB Aware Service Listener: The “FirstService:SimpleJMSService” ESB Aware Service Listener listens for “ESB Aware” messages on “queue/B”. This introduces you further to the concept of ESB “Aware” and “Unaware” messages. We will touch on these next.

ESB Aware and Unaware Messages

JBoss ESB has a well defined concept of what a message is. This is defined fully in xml/message.xsd. This construct makes it possible to pass decorated messages payloads between components of the ESB. The message payload is typically stored in the message “Body” (see the Programmers Guide).

This makes a lot of sense from the point of Services in within the ESB domain being able to collaborate effectively. However, it is not practical to expect endpoints outside the domain of a JBoss ESB deployment to be “aware” of these internal ESB constructs. For this reason, JBoss ESB has the concept of ESB Aware and Unaware Messages and Endpoints, with the Gateway acting as the bridge (adapter) between the two worlds.

QuickStart Sequence of Events

After starting the ESB in Window1 and before any “Hello World” messages are put on the bus, the “FirstService:SimpleJMSService“ Service is registered with the Registry Service.

The sequence of events in the Hello World QuickStart are as follows:

1. ESB Unaware JMS Client endpoint puts an ESB Unaware “Hello World” Message (plain String Object) into JMS Queue “queue/quickstart_helloworld_Request”.

2. The JMS Gateway Listener receives the ESB Unaware message. The Gateways Job is to adapt this message by making it an ESB Aware Message for consumption by an ESB Aware Endpoint.

3. The JMS Gateway Listener uses the registry to lookup the Endpoint Reference (EPR) for “FirstService:SimpleJMSService” Service. This works out to be JMS Queue “queue/B”.

4. The JMS Gateway Listener “adapts” the message into an ESB Aware message and places it into JMS Queue “queue/B”.

5. “FirstService:SimpleJMSService” Service receives the message.

6. “FirstService:SimpleJMSService” Service extracts the payload from the message and prints it to the console.

Chapter 2

TrailBlazer

Overview

JBoss TrailBlazers and Demo Applications are designed to help you get up and running quickly with JBoss products and technologies. We encourage you to Run them, Download them, and enjoy the learning process!

The Loan Broker TrailBlazer example was developed to verify your JBossESB installation and also to exhibit some of the numerous capabilities of JBossESB. This example was based on information from www.eaipatterns.org, along with the example found at JavaZone 2005.

For details of configuring and running the TrailBlazer, see the accompanying “Trailblazer” document.