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Activiti and Karaf

Question asked by bkonrad on Aug 12, 2014
Latest reply on Aug 13, 2014 by bkonrad
Activiti 5.16 is now OSGi compatible and Apache Karaf is a great environment to run Activiti. After some time I managed to install the engine as bundles in Apache Karaf.
My first question is: Is there a standard provisioning for installing Activiti in Karaf (i.e. a feature.xml)?

What I did is to implement a bundle exposing activiti services.
My current problem is, that deploying a new process causes that the process image can not be created because of classloader issues:

2014-08-11 10:18:20,041 | WARN  | ExtenderThread-4 | BpmnDeployer                     | 218 - org.activiti.engine - 5.16.0 | Error while generating process diagram, image will not be stored in repository
java.lang.IllegalArgumentException: input == null!
   at org.activiti.image.impl.DefaultProcessDiagramCanvas.initialize(

Is this a known bug running activiti in OSGi?

This snippet is from bundle exposing activiti as OSGi Services:

        <bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
      <property name="dataSource" ref="dataSource" />
      <property name="transactionManager" ref="transactionManager" />
      <property name="databaseSchemaUpdate" value="true" />
      <property name="jobExecutorActivate" value="true" />
      <property name="enableDatabaseEventLogging" value="true" />
      <!– property name="expressionManager" ref="osgiExpressionManager" /–>
   <bean id="processEngineFactory" class="org.activiti.spring.ProcessEngineFactoryBean" destroy-method="destroy">
      <property name="processEngineConfiguration" ref="processEngineConfiguration" />
   <bean id="processEngine" factory-bean="processEngineFactory" factory-method="getObject" />
   <bean id="repositoryService" factory-bean="processEngine" factory-method="getRepositoryService" />
   <osgi:service id="repositoryServiceOsgi" ref="repositoryService" interface="org.activiti.engine.RepositoryService" />
   <bean id="runtimeService" factory-bean="processEngine" factory-method="getRuntimeService" />
   <osgi:service id="runtimeServiceOsgi" ref="runtimeService" interface="org.activiti.engine.RuntimeService" />