topic Re: BusinessKey is null for Executions in Alfresco Archive

BusinessKey is null for Executions

vicziani — Fri, 15 Jun 2012 15:00:49 GMT

I have a workflow with two User Task after a Parallel Gateway. I start the process with a BusinessKey. After that I have three executions. The BusinessKey of the execution of the parallel gateway is ok, but the BusinessKeys of the two User Tasks are null.Is it normal?

Re: BusinessKey is null for Executions

frederikherema1 — Mon, 18 Jun 2012 08:35:21 GMT

What about the "getProcessBusinessKey()" on the DelegateExecution? This should return the business-key set at the beginning not the process… The getBusinessKey() will only work if the execution you're using is the process-instance itself.


/** The business key for this execution. Only returns a value if the delegate execution
   * is a process instance.
   *  
   * @deprecated use {@link #getProcessBusinessKey()} to get the business key for the process
   *             associated with this execution, regardless whether or not this execution is a 
   *             process-instance. 
   */
  String getBusinessKey();

Re: BusinessKey is null for Executions

vicziani — Mon, 18 Jun 2012 12:47:49 GMT

getProcessBusinessKey throws NullPointerException.

java.lang.NullPointerException
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.ensureProcessInstanceInitialized(ExecutionEntity.java:669)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.getProcessInstance(ExecutionEntity.java:663)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.getProcessBusinessKey(ExecutionEntity.java:624)

And I cannot query the other executions with createExecutionQuery().processInstanceBusinessKey(), because their business key is null. I think the executions after the parallelgateway should be equals the businesskey of the parallelgateway.

What about the "getProcessBusinessKey()" on the DelegateExecution? This should return the business-key set at the beginning not the process… The getBusinessKey() will only work if the execution you're using is the process-instance itself.

/** The business key for this execution. Only returns a value if the delegate execution * is a process instance. * * @deprecated use {@link #getProcessBusinessKey()} to get the business key for the process * associated with this execution, regardless whether or not this execution is a * process-instance. */ String getBusinessKey();

Re: BusinessKey is null for Executions

frederikherema1 — Mon, 18 Jun 2012 13:00:20 GMT

The null pointer is due to the fact you're nog using the execution inside activiti context (e.g.. JavaDelegate, listener) but rater just use the pogo that comes out of a query.

The query-method you are referring to only selects process-instances which have the given business key set. Since a business-key is a unique identifier for a single process-instance (also enforced on db-level), it doesn't make sense setting the BUSINESS_KEY_ field on the child executions as well (defeats the purpose).

If you want all child-executions of the process-instances with a given business-key, use this approach:


ProcessInstance pi  = runtime.createProcessInstanceQuery().processInstanceBusinessKey("myKey").singleResult();
List<Execution> executions = runtime.createExecutionQuery().processInstanceId(pi.getId().list();

Re: BusinessKey is null for Executions

vicziani — Wed, 20 Jun 2012 10:54:35 GMT

Thank you very much, understood, this works for me!