Nov 23
This semester I’m studying a subject called Network Project where we study the principles behind the design, configuration and evaluation of computer network applications, protocols and specific formats for use on the Internet.
As a final project we have to build a system using several network technologies such XML, Ajax, SOAP or RMI. We decided to develop contract signing portal to give support to businessmen.
To build a big system like that in a record time we are going to use frameworks to make our workload lighter. JBoss jBPM is one of them.
jBPM includes an Eclipse plug-in to model business processes. You can specify the work-flow of you processes using a drag&drop interface, adding nodes and transition in a very simple way.
Eclipse automatically creates an XML file that defines the process. You can deploy this file to your application and jBPM work-flow engine controls its execution. This engine includes tools like Hibernate to manage persistence and state of the process and log4j for system logging.
jBPM also includes a tool for monitoring the execution of your business processes so you can control your company.
In my opinion this is an excellent middleware for integration of enterprise applications. It makes easy all the development to the programmer and offers great advantages to CEO’s and other members on the board.
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Tags: BPM, Eclipse, Hibernate, Java, JBoss, jBPM, workflow
Nov 23
This post is a how-to with the necessary steps to install jBPM 3.2.2 on a Apache Tomcat 5.5 and MySQL 5.0.
- Create schema and table in database
In this example a schema ‘jbpm’ with a user ‘jboss’ is used.
Generate all jBPM tables using the script jbpm.jpdl.mysql.sql. If you want your users/roles information (the identity components) also from the MySQL db, use the second sql script attached here mysql.identity.script.jbpm321.sql to set up the necessary tables and fill them with the demo values.
- Prepare your jBPM archive
- Open a console in jbpm-jpdl-3.2.2/deploy and run:
ant customize.console.for.tomcat
- This builds a jbpm-console.war in jbpm-jpdl-3.2.2/deploy/customized
- Unzip this file and change jbpm-console/WEB-INF/classes/hibernate.cfg.xml to reflect the following changes:
<hibernate-configuration>
<session-factory>
<!-- hibernate dialect -->
<property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
<!-- JDBC connection properties (begin) -->
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/jbpm</property>
<property name="hibernate.connection.username">jboss</property>
<property name="hibernate.connection.password">jboss</property>
<!-- JDBC connection properties (end) -->
<property name="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</property>
<!-- DataSource properties (begin) ==
<property name="hibernate.connection.datasource">java:/JbpmDS</property>
== DataSource properties (end) -->
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
...
- Note that the following line is commented:
<property name="hibernate.connection.datasource">java:/JbpmDS</property>
- Extract el-api.jar and el-ri.jar from the original war file (jbpm-console.war/WEB-INF/lib) to jbpm-console/WEB-INF/lib
- Copy jboss-j2ee.jar and commons-collections.jar to jbpm-console/WEB-INF/lib. You can find these files in jbpm-jpdl-3.2.2/server/server/jbpm/lib
- Download mysql jdbc driver from MySQL Home Page and move it to $TOMCAT_HOME/common/lib
- Zip jbpm-console to a war file and move it to $TOMCAT_HOME/webapps
- Setup a JDBC Realm in Tomcat
Create a file jbpm-console.xml in /$CATALINA_HOME/conf/Catalina/localhost similar to
<Context>
<Realm className="org.apache.catalina.realm.JDBCRealm"
driverName="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/jbpm"
connectionName="jboss"
connectionPassword="jboss"
userTable="JBPM_ID_USER u, JBPM_ID_MEMBERSHIP m, JBPM_ID_GROUP g"
userNameCol="g.TYPE_ = 'security-role' AND m.GROUP_ = g.ID_ AND m.USER_ = u.ID_ AND u.NAME_"
userCredCol="DISTINCT u.PASSWORD_"
userRoleTable="JBPM_ID_USER u, JBPM_ID_MEMBERSHIP m, JBPM_ID_GROUP g"
roleNameCol="g.NAME_" />
</Context>
Now you should be able to run jBPM default web app in Tomcat.
This how-to is a resume and an adaptation of JBoss.com Wiki. Sql scripts are also the same of the original page.
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Tags: BPM, Hibernate, HowTo, Java, JBoss, jBPM, MySQL, Tomcat, workflow
Nov 21
This week I have spent few hours in DFWikiTeam new web site. The result is what you can see.
www.dfwikilabs.org is our new enterprise web. I have installed a Drupal to manage all content and public information related to our projects.
I have also set up a Wordpress Mu in this subdomain(blogs.dfwikilabs.org) to give to all my partners an user-friendly environment to publish their work.
I hope that next week the whole site could be finally customized and ready to add content.
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Tags: DFWikiLABS, DFWikiTeam, Drupal, WordPress
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