Ok I'm having quite some issues setting both jbpm and jboss working together...something as simple as running the jbpm process from a servlet is trunning to be a pain and all because jBoss can't find classes.
I made a Dynamic Web Project and didn't use Maven project so things are cleaner...and because it should work.
I just want to load a jbpmn2.0 from the repository in a servlet and run it using a WorkItemHanlder....but I get this:
java.lang.ClassNotFoundException: org.drools.runtime.process.WorkItemHandler
For some reason jBoss can't find a class from jBPM that should work on JBoss. What I did....and I think it's not the right solution...was add the knowledge-api.jar to the WEB-INF/lib. Although I can now deploy the app when I try to run it I get:
Error Unable to instantiate service for Class 'org.drools.builder.KnowledgeBuilderFactoryService'
I Honestly don't get why is it so hard to make a Jboss Web app using jBpm.
You need to make sure all dependencies are on your classpath, this is the same for all Java applications (not just jbpm) and application servers (not just JBossAS).
Which jars did you add? Depending on which features you are using, there could be quite a number of jars that you need to add. One option would for example would be to extract the jars in the jBPM runtime zip that is part of the jBPM downloads into your WEB-INF/lib.
If you use Maven, you would be able to automatically derive all required jars.
Kris
Related
I'm trying to deploy an EJB-JAR on Glassfish (4 or 3.1.2.2).
This EJB-JAR has some library dependencies. I would like to deploy these dependencies application specific. No other application running on glassfish should include this specific libraries.
But unfortunately, it doesn't work like described in the following link.
I always get a ClassDefNotFound-Error.
If I copy all libraries in domain-dir/lib/ext, everything works fine. But now, glassfish will include this libraries to ohter applications too. Am I right?
http://docs.oracle.com/cd/E18930_01/html/821-2418/gatej.html
Just place the library jar in the WEB-INF/lib folder of your EJB jar. There's no need to setup any additional configuration (like is specified in that link).
I am a beginner with struts2 and I have few struts2 projects downloaded from a website, but they all are created as simple java projects and not as web-projects, so I am unable to deploy them on my Tomcat or JBoss AS server through Eclipse.
How can simple java projects be deployed on a Java EE server?
Your best bet is download sample applications from Struts2 official sites and deploy them on any of the server of your choice.
Those sample application comes with all required dependencies as well will give you idea about structuring of S2 application as well flow and configurations
I created a structure similar to the one shown on website and manually added all the files required and it worked.
When I develop an Axis2 web service on Eclipse, I noticed that Eclipse is automatically copying the classes from the lib folder of Axis2 to the lib folder of the new project. However, not all classes from the lib folder of Axis2 are being copied. Interestingly, the web service runs without any problem when deployed to Tomcat via Eclipse even if some the jars from Axis2 were not copied. Also, when I viewed the temp file of Tomcat, Tomcat seems to generate the jars for the listed modules on modules.list of the web service.
Can someone enlighten me regarding what is happening on this? Why Eclipse doesn't copy all the jars from Axis2? Why can the web service run on Tomcat even without the other jars from Axis2? What are those temp files for? When and why is it being generated?
I tried to run the same project on WebSphere and I am encountering a ClassDefNotFound exception because of the missing jars. My problem was solved when I copied all the Axis2 jars that was not copied by Eclipse to my project. But I'm not comfortable with my solution because Tomcat can run my project even without those jars. Is my solution really the right solution? Or am I missing a configuration setting?
This is just for clarification:
My web service is already running in Axis2. My class loading policy is set to PARENT_LAST. I know that since WebSphere has its own Axis2 configuration, the class loading policy must be set to PARENT_LAST so that WebSphere will use the Axis2 from the project itself. Aside from setting the class loading policy, I did something to make my web service run on WebSphere. I describe what I did above. My question is why such method must be taken?
WebSphere has it's own axis2 configuration as part of its Java EE server spec for JAX-WS. Change your class loading policy to PARENT_LAST and check if that solves your problem.
Edit:
As the original post already states: WebSphere is a Java EE server depending on version it supports its the standard Java JAX-WS web services. Actually web services became part of the standard jdk.
If you use JAX-WS like mentioned in Introduction to JAX-WS or building web services then you don't have to add any 3rd party library for getting your web services running. As soon as you use the non JDK implementation like axis2 you have to package it with your application.
IBM didn't just pack the axis2 into their WAS/JDK, they modified it. I'm not sure what Tomcat delivers, however as long as you use JAX-WS it shouldn't matter. With JAX-WS you don't have any direct import of the org.apache.axis packages. If you use these imports you have to supply the libraries and make sure that yours are loaded.
Is it possible to run Jboss 4.2.3 as a bundle inside OSGI container? What would be the challenges associated with it?
For those who cares, I am looking at running dcm4chee inside OSGI.
While not impossible it would be incredibly hard, a simpler alternative would be to embed OSGi inside JBoss, see:
http://felix.apache.org/site/apache-felix-framework-launching-and-embedding.html
and
Programmatically Start OSGi (Equinox)?
and
http://njbartlett.name/2011/03/07/embedding-osgi.html
http://www.dcm4che.org/jira/browse/DCM-308 Looks like they're adding support to make the Jars valid bundles - couldn't you just work out the dependencies and deploy these to an OSGi framework? OSGi has support for JMX and JNDI.
Unless there are huge dependencies on JBoss' internals, I'd suggest the second option, but beware of Class.forName usage and other non-osgi-friendly code.
I logged the bug specifically for the dcm4che (note 1 e) toolkits, not the dcm4chee war. I would suggest logging a new issue for the dcm4chee assembly. However, making the dcm4che toolkit components osgi bundles would likely be a required step in the direction of getting dcm4chee to run in an osgi container.
How to make a standalone lift application? Which tools/libraries to use? How does the performance compare to using lift application as a war in some application server?
With onejar maven plugin http://onejar-maven-plugin.googlecode.com/svn/mavensite/usage.html and maven I could package jetty and project with dependencies inside one jar.
The part of the question on performance doesn't really fit with the rest. You are primarily asking how to package the Lift application as a single JAR/WAR. This doesn't have anything to do with the runtime.
At runtime you will still be running inside a Servlet container (could be Jetty, Tomcat or a full-blown Java EE server). How you package your application won't affect the performance.
You could take a look at Hudson (a great Continuous Integration Server) to see how they deliver as a single WAR file that contains an embedded Servlet container. You can download the WAR file and run it from the command line: java -jar hudson.war
I know this is an old question, but...
If you are using sbt, I wrote a plugin to produce 'executable' wars like those mentioned above.
https://github.com/glenford/sbt-jetty-embed