I am trying to use Flowable-engine v6.4.0 on Felix Framework. Unfortunately, I do not appear to successfully instantiate a ProcessEngineConfiguration.
Is there a functional example/tutorial available for using Flowable-engine in OSGi?
Thanks in advance
There is an example re OSGi and Activiti in the Activiti in Action book.
I also found this post: Using the Activiti-Engine as bundle in JBoss AS 7.2 ~ Wrong tracks of a developer
Thanks for the input.
The last link you provided helped me solving some problems instantiating a Process Engine due to modules I was missing.
After solving instantiating the Process Engine based on the information using Flowable-engine v5.23.0 on Felix Framework, while calling RuntimeService.startProcessInstanceByKey() I get some class loading issues for classes used in the activity delegate that are imported from another bundle:
java.lang.NoClassDefFoundError: <My Class URL>
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.getDeclaredMethod(Unknown Source)
at java.io.ObjectStreamClass.getPrivateMethod(Unknown Source)
at java.io.ObjectStreamClass.access$1700(Unknown Source)
at java.io.ObjectStreamClass$3.run(Unknown Source)
at java.io.ObjectStreamClass$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.io.ObjectStreamClass.<init>(Unknown Source)
at java.io.ObjectStreamClass.lookup(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at org.activiti.engine.impl.variable.SerializableType.serialize(SerializableType.java:93)
at org.activiti.engine.impl.variable.SerializableType.setValue(SerializableType.java:69)
at org.activiti.engine.impl.persistence.entity.VariableInstanceEntity.setValue(VariableInstanceEntity.java:178)
at org.activiti.engine.impl.persistence.entity.VariableInstanceEntity.create(VariableInstanceEntity.java:74)
at org.activiti.engine.impl.persistence.entity.VariableInstanceEntity.createAndInsert(VariableInstanceEntity.java:60)
at org.activiti.engine.impl.persistence.entity.VariableScopeImpl.createVariableInstance(VariableScopeImpl.java:895)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.createVariableInstance(ExecutionEntity.java:1194)
at org.activiti.engine.impl.persistence.entity.VariableScopeImpl.createVariableLocal(VariableScopeImpl.java:808)
at org.activiti.engine.impl.persistence.entity.VariableScopeImpl.createVariableLocal(VariableScopeImpl.java:795)
at org.activiti.engine.impl.persistence.entity.VariableScopeImpl.setVariable(VariableScopeImpl.java:689)
at org.activiti.engine.impl.persistence.entity.VariableScopeImpl.setVariable(VariableScopeImpl.java:646)
at org.activiti.engine.impl.persistence.entity.VariableScopeImpl.setVariables(VariableScopeImpl.java:590)
at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.initializeVariables(StartProcessInstanceCmd.java:122)
at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:107)
at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:37)
at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35)
at org.activiti.engine.impl.RuntimeServiceImpl.startProcessInstanceByKey(RuntimeServiceImpl.java:82)
at
...
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: <My Class Name>
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.apache.felix.framework.BundleWiringImpl.doImplicitBootDelegation(BundleWiringImpl.java:1817)
at org.apache.felix.framework.BundleWiringImpl.tryImplicitBootDelegation(BundleWiringImpl.java:1746)
at org.apache.felix.framework.BundleWiringImpl.searchDynamicImports(BundleWiringImpl.java:1699)
at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1575)
at org.apache.felix.framework.BundleWiringImpl.access$300(BundleWiringImpl.java:79)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1982)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 63 more
Even though I have the packages properly set in <Import-Package>, I keep my process failed to start for this reason.
Has anyone met that issue?
We had no classloading issues with flowable 5.23.0 and Karaf. Since the bundle containing the process engine can not know all Java Delegate classes, we added
<DynamicImport-Package>*</DynamicImport-Package>
to the bundle.
Do you use org.activiti.osgi.blueprint.ProcessEngineFactoryWithELResolver as processEngineFactory?
I have already <DynamicImport-Package>*</DynamicImport-Package> set on that bundle.
As per org.activiti.osgi.blueprint.ProcessEngineFactoryWithELResolver as processEngineFactory, I do not have any blueprint in my bundle (not too familiar with). I am programatically instantiating the Process Engine using a StandaloneInMemProcessEngineConfiguration.
The error mentioned above was caused by the OSGi service/interface instance I was sending as a variable (while being serialized).
Still, after commenting all references to that interface in the code in my Flowable-based bundle, class loading issues appeared in regard to the custom delegate used in the first task of the process.
From:
<serviceTask id=“XYZ” name=“ABC” activiti:class=“my.delegates.CustomDelegate” >
The error is:
“org.activiti.engine.ActivitiClassLoadingException: Class not found: my.delegates.CustomDelegate
at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:87)
at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:134)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.defaultInstantiateDelegate(ClassDelegate.java:238)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.instantiateDelegate(ClassDelegate.java:228)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.getActivityBehaviorInstance(ClassDelegate.java:207)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.execute(ClassDelegate.java:151)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:60)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerStart.java:52)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicOperationTransitionCreateScope.java:49)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerTake.execute(AtomicOperationTransitionNotifyListenerTake.java:80)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionDestroyScope.execute(AtomicOperationTransitionDestroyScope.java:116)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerEnd.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerEnd.java:35)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:460)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:438)
at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnActivityBehavior.java:140)
at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavior(BpmnActivityBehavior.java:66)
at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBehavior.java:44)
at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.execute(FlowNodeActivityBehavior.java:36)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:60)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStartInitial.eventNotificationsCompleted(AtomicOperationProcessStartInitial.java:45)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643)
at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStart.eventNotificationsCompleted(AtomicOperationProcessStart.java:64)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.start(ExecutionEntity.java:388)
at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:115)
at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:37)
at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35)
at org.activiti.engine.impl.RuntimeServiceImpl.startProcessInstanceByKey(RuntimeServiceImpl.java:82)”
I must be missing something either in the OSGi configuration of the bundle, or in the bundles itself, but I cannot figure this out.
You should give the ProcessEngineFactoryWithELResolver a try, I guess, it influences the classloading behaviour. You can configure the bean without having blueprint, the bean property ‘blueprintContextELResolver’ can be null:
<bean id="blueprintELResolver" class="org.activiti.osgi.blueprint.BlueprintELResolver" />
<bean id="processEngineFactory" class="org.activiti.osgi.blueprint.ProcessEngineFactoryWithELResolver" init-method="init" destroy-method="destroy">
<property name="processEngineConfiguration" ref="processEngineConfiguration" />
<property name="bundle" ref="blueprintBundle" />
<property name="blueprintELResolver" ref="blueprintELResolver" />
</bean>Using the blueprint as:
<bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration" ext:field-injection="true"> <property name="dataSource" ref="dataSource" /> <property name="databaseSchemaUpdate" value="true" /> <property name="asyncExecutorActivate" value="true" /> <property name="disableIdmEngine" value="true" /> <property name="resolverFactories"> <list> <bean class="org.activiti.engine.impl.scripting.VariableScopeResolverFactory" /> </list> </property> </bean> <bean id="blueprintELResolver" class="org.activiti.osgi.blueprint.BlueprintELResolver" /> <bean id="processEngineFactory" class="org.activiti.osgi.blueprint.ProcessEngineFactoryWithELResolver" init-method="init" destroy-method="destroy"> <property name="processEngineConfiguration" ref="processEngineConfiguration" /> <property name="bundle" ref="blueprintBundle" /> <property name="blueprintELResolver" ref="blueprintELResolver" /> </bean> <reference id="dataSource" interface="javax.sql.DataSource" />
I still get a class loading related error:
org.activiti.engine.impl.interceptor.CommandContext - Error while closing command context
org.activiti.engine.ActivitiException: couldn’t instantiate class my.delegates.CustomDelegate
at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:137) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.defaultInstantiateDelegate(ClassDelegate.java:238) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.instantiateDelegate(ClassDelegate.java:228) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.getActivityBehaviorInstance(ClassDelegate.java:207) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.execute(ClassDelegate.java:151) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:60) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerStart.java:52) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicOperationTransitionCreateScope.java:49) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerTake.execute(AtomicOperationTransitionNotifyListenerTake.java:80) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionDestroyScope.execute(AtomicOperationTransitionDestroyScope.java:116) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerEnd.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerEnd.java:35) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:460) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:438) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnActivityBehavior.java:140) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavior(BpmnActivityBehavior.java:66) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBehavior.java:44) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.execute(FlowNodeActivityBehavior.java:36) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:60) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStartInitial.eventNotificationsCompleted(AtomicOperationProcessStartInitial.java:45) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStart.eventNotificationsCompleted(AtomicOperationProcessStart.java:64) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:97) [flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:650) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:643) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.start(ExecutionEntity.java:388) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:115) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:37) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24) ~[flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57) [flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31) [flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40) [flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35) [flowable-engine-5.23.0.jar:5.23.0]
at org.activiti.engine.impl.RuntimeServiceImpl.startProcessInstanceByKey(RuntimeServiceImpl.java:82) [flowable-engine-5.23.0.jar:5.23.0]
at []
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
Caused by: org.activiti.engine.ActivitiClassLoadingException: Class not found: com.ge.flowbase.server.orchestration.delegates.CalculationOutputFilesMappingDelegate
at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:87) ~[?:?]
at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:134) ~[?:?]
… 92 more
Caused by: java.lang.ClassNotFoundException: my.delegates.CustomDelegate
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_121]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_121]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[?:1.8.0_121]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_121]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_121]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_121]
at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:291) ~[?:?]
at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:68) ~[?:?]
at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:134) ~[?:?]
… 92 more
I have solved the issue above:
I can use the activiti:class attribute from without class loading issue. (Still needing to check the use of beans with the activiti:delegateExpression attribute)
In a rush of finalizing my prototype, I made a few mistakes mostly due to the fact I had process-engine and workflow-processor in the same bundle and that I was not using ProcessEngine service exported from the blueprint.
Now, I am facing EL issues in conditional transitions, but they are due to the way my entity are structured.
I am having issues with the activiti:delegateExpression attribute as the bean is not found. Documented under Flowable-engine in OSGi - Use of delegateExpression attribute resulting in bean not found issue
Interesting post re Spring Boot and OSGi: https://stackoverflow.com/questions/30881786/can-spring-boot-be-used-with-osgi-if-not-any-plans-to-have-an-osgi-spring-boot
I have succeeded to finalize my implementation of Flowable (v5.23.0) in OSGi (Felix Framework v6.0.1)
Thanks to everyone’s inputs on the matter (or related topincs)