[rules-users] Drools Flow: Variable Persistence Strategies

[Mauricio Salatino]

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