Comments on: jBPM4 real-life example: The Train Ticket Demo (part 4: the end application) http://www.jorambarrez.be/blog/2009/09/16/jbpm4-real-life-example-the-train-ticket-demo-part-4-the-end-application/ Small steps with big feet Wed, 18 Jan 2012 17:26:56 +0000 hourly 1 http://wordpress.org/?v=3.3 By: José Luis Granda http://www.jorambarrez.be/blog/2009/09/16/jbpm4-real-life-example-the-train-ticket-demo-part-4-the-end-application/comment-page-1/#comment-4638 José Luis Granda Wed, 17 Nov 2010 22:37:43 +0000 http://www.jorambarrez.be/blog/?p=417#comment-4638 Hi Joram, i try to run jbpm-on-rails at jboss-5.1.0.GA. I generate the ear pakage from sources. I get exception: [AbstractKernelController] Error installing to Real: name=vfszip:/usr/local/jboss-5.1.0.GA.JBPM/server/jbpm/deploy/jbpm-on-rails.ear/ state=PreReal mode=Manual requiredState=Real org.jboss.deployers.spi.DeploymentException: Error during deploy: vfszip:/usr/local/jboss-5.1.0.GA.JBPM/server/jbpm/deploy/jbpm-on-rails.ear/jbpm-on-rails-war-1.0.war/ at org.jboss.deployers.spi.DeploymentException.rethrowAsDeploymentException(DeploymentException.java:49) Caused by: java.lang.NoClassDefFoundError: HttpServlet at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) at org.jboss.classloader.spi.base.BaseClassLoader.access$200(BaseClassLoader.java:63) at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:572) at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:532) help me please Hi Joram, i try to run jbpm-on-rails at jboss-5.1.0.GA. I generate the ear pakage from sources.

I get exception:

[AbstractKernelController] Error installing to Real: name=vfszip:/usr/local/jboss-5.1.0.GA.JBPM/server/jbpm/deploy/jbpm-on-rails.ear/ state=PreReal mode=Manual requiredState=Real
org.jboss.deployers.spi.DeploymentException: Error during deploy: vfszip:/usr/local/jboss-5.1.0.GA.JBPM/server/jbpm/deploy/jbpm-on-rails.ear/jbpm-on-rails-war-1.0.war/
at org.jboss.deployers.spi.DeploymentException.rethrowAsDeploymentException(DeploymentException.java:49)

Caused by: java.lang.NoClassDefFoundError: HttpServlet
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at org.jboss.classloader.spi.base.BaseClassLoader.access$200(BaseClassLoader.java:63)
at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:572)
at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:532)

help me please

]]> By: Eduardo http://www.jorambarrez.be/blog/2009/09/16/jbpm4-real-life-example-the-train-ticket-demo-part-4-the-end-application/comment-page-1/#comment-4000 Eduardo Thu, 17 Jun 2010 11:47:09 +0000 http://www.jorambarrez.be/blog/?p=417#comment-4000 Thanks a lot for the example!!. Without any doubt is the more complex jbpm example than I have found in Internet. I only have to complain about the difficult to implement the all example because the svn direction doesn't work and I had to spend a day until I could work it (although I didn't try with complete download). Thanks a lot for the example!!. Without any doubt is the more complex jbpm example than I have found in Internet. I only have to complain about the difficult to implement the all example because the svn direction doesn’t work and I had to spend a day until I could work it (although I didn’t try with complete download).

]]> By: Carlos Latugaye http://www.jorambarrez.be/blog/2009/09/16/jbpm4-real-life-example-the-train-ticket-demo-part-4-the-end-application/comment-page-1/#comment-3878 Carlos Latugaye Fri, 18 Sep 2009 12:03:23 +0000 http://www.jorambarrez.be/blog/?p=417#comment-3878 Thanks for the explanation! The documentation you provided was exactly what I was looking for. I was referring the the jBPM jobs. In particularly I was trying to understand how jBPM handles the case of a due transition of a process instance when running multiple engines. Thanks for the explanation! The documentation you provided was exactly what I was looking for.

I was referring the the jBPM jobs. In particularly I was trying to understand how jBPM handles the case of a due transition of a process instance when running multiple engines.

]]> By: Joram Barrez http://www.jorambarrez.be/blog/2009/09/16/jbpm4-real-life-example-the-train-ticket-demo-part-4-the-end-application/comment-page-1/#comment-3874 Joram Barrez Thu, 17 Sep 2009 07:33:31 +0000 http://www.jorambarrez.be/blog/?p=417#comment-3874 @Carlos It is certainly possible to have multiple nodes with multiple JVM's working on the same set f processes. jBPM relies heavily on the transactional capabilitites of the underlying database to achieve this. What do you mean by jobs? If you mean jBPM jobs, than it is quite easy. Just take a look at our developers guide, the section about the job executor (http://docs.jboss.org/jbpm/v4.0/devguide/html_single/#jobexecutor). It is built specifically to work on a cluster (but works great standalone,too). The architecture I describe in this article, is easy to scale over multiple nodes (with a simple loadbalancer like Pen on Linux). Since jBPM synchronizes on the database, it doesn't matter on which node the actual request is processed. Hope this helps! Joram @Carlos It is certainly possible to have multiple nodes with multiple JVM’s working on the same set f processes. jBPM relies heavily on the transactional capabilitites of the underlying database to achieve this.

What do you mean by jobs? If you mean jBPM jobs, than it is quite easy. Just take a look at our developers guide, the section about the job executor (http://docs.jboss.org/jbpm/v4.0/devguide/html_single/#jobexecutor). It is built specifically to work on a cluster (but works great standalone,too).

The architecture I describe in this article, is easy to scale over multiple nodes (with a simple loadbalancer like Pen on Linux). Since jBPM synchronizes on the database, it doesn’t matter on which node the actual request is processed.

Hope this helps!

Joram

]]> By: Carlos Latugaye http://www.jorambarrez.be/blog/2009/09/16/jbpm4-real-life-example-the-train-ticket-demo-part-4-the-end-application/comment-page-1/#comment-3873 Carlos Latugaye Wed, 16 Sep 2009 14:27:39 +0000 http://www.jorambarrez.be/blog/?p=417#comment-3873 Hi Joram, Thanks for this series of articles. They are a great introduction to jBPM. I'm interested in understanding how jBPM scales and behaves in a HA environment. Is it possible to have multiple JVMs running the same set of processes? If so, how get jobs synchronized across the JVMs? Is there any available documentation about this topic? Thanks in advance, Carlos Hi Joram,

Thanks for this series of articles. They are a great introduction to jBPM.

I’m interested in understanding how jBPM scales and behaves in a HA environment. Is it possible to have multiple JVMs running the same set of processes? If so, how get jobs synchronized across the JVMs? Is there any available documentation about this topic?

Thanks in advance,

Carlos

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