2010/2/12 Dale Wyttenbach <dale.wyttenbach@gmail.com>

If you try to write a query that requires VariableInstanceInfo.processId, it won't work because that class has no processId member.
I guessed that processInstanceId would be a better join column, and that worked (patch attached)

Thanks for the reply.

2010/2/12 Mauricio Salatino <salaboy@gmail.com>

Hmm..
I'm looking at the source and I see the following mapping:

@OneToMany(cascade = CascadeType.ALL)
    @JoinColumn(name = "processId")
    @MapKey(name = "name")
    private Map<String, VariableInstanceInfo> variables          = new HashMap<String, VariableInstanceInfo>();

That makes me think that there is a join column called processId between VariableInstanceInfo and ProcessInstanceInfo.

2010/2/12 Dale Wyttenbach <dale.wyttenbach@gmail.com>

I have a patch for drools-persistence-jpa should anyone agree with me that ProcessInstanceInfo and VariableInstanceInfo should be joined by processInstanceId.

On Fri, Feb 12, 2010 at 10:52 AM, Dale Wyttenbach <dale.wyttenbach@gmail.com> wrote:

I'm trying to adapt the StringVariablePersister presented in http://blog.athico.com/2009/09/drools-flow-variable-persistence.html

I can create process instances with variable "color":

  private static WorkflowProcessInstance startProcess(StatefulKnowledgeSession ksession, String color) {

   Map<String, Object> vars = new HashMap<String, Object>();
   vars.put("color", color);
   WorkflowProcessInstance p1 = (WorkflowProcessInstance) ksession.startProcess("com.sample.ruleflow", vars);

   return p1;
  }

I can count them:

select
   count(*)
from
   ProcessInstanceInfo

However I'm stymied as to counting process instances with a given color, as there appears to be no join column between ProcessInstanceInfo and VariableInstanceInfo.

Can such a query be written?

Thanks.

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