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Re: Access variables bound to process instance during its lifecyle
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created by <a href="https://community.jboss.org/people/roxy1987">Shobhit Tyagi</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/819172#819172">View the full discussion</a>
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<div class="jive-rendered-content"><p>To read a process variable you could use the following code :</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java"><font color="navy"><b>public</b></font> Map<String, Object> getProcessVariables(<font color="navy"><b>final</b></font> <font color="navy"><b>long</b></font> intProcessInstId
 
) <font color="navy">{</font>
  StatefulKnowledgeSession objKSession = getSession(); <font color="darkgreen">//Get the session</font>
   Map<String, Object> hshVariables = <font color="navy"><b>null</b></font>;
 
  <font color="navy"><b>try</b></font> <font color="navy">{</font>
   hshVariables = objKSession.execute(<font color="navy"><b>new</b></font> GenericCommand<Map<String, Object>>() <font color="navy">{</font>
    <font color="navy"><b>private</b></font> <font color="navy"><b>static</b></font> <font color="navy"><b>final</b></font> <font color="navy"><b>long</b></font> serialVersionUID = 1L;
 
    <font color="navy"><b>public</b></font> Map<String, Object> execute(Context objContext) <font color="navy">{</font>
           StatefulKnowledgeSession objKSession = ((KnowledgeCommandContext) objContext)
                        .getStatefulKnowledgesession();
           org.jbpm.process.instance.ProcessInstance objProcessInstance = (org.jbpm.process.instance.
                           ProcessInstance) objKSession.
                           getProcessInstance(intProcessInstId);
           VariableScopeInstance objVariableScope = (VariableScopeInstance) objProcessInstance.
                          getContextInstance(VariableScope.VARIABLE_SCOPE);
        <font color="darkgreen">/*Obtiene las variables del Proceso*/</font>
           Map<String, Object> hshVariables = objVariableScope.getVariables();
           <font color="navy"><b>return</b></font> hshVariables;
       <font color="navy">}</font>
   <font color="navy">}</font>);
  <font color="navy">}</font> <font color="navy"><b>catch</b></font>(Exception objException) <font color="navy">{</font>
   objLogger.loggerError(objException);
  <font color="navy">}</font>
  <font color="navy"><b>return</b></font> hshVariables;
<font color="navy">}</font>
 
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>And to put a variable in the process</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>public void setProcessVariables(final long intProcessInstId, final Map<String, Object> hshVariableMap)</p><p>{</p><p>  StatefulKnowledgeSession objKSession = getSession(); //Get the session</p><p>  try {</p><p>   objKSession.execute(new GenericCommand<Map<String, Object>>() {</p><p>   </p><p>    private static final long serialVersionUID = 1L;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    public Map<String, Object> execute(Context objContext) {</p><p>           StatefulKnowledgeSession objKSession = ((KnowledgeCommandContext) objContext).</p><p>                      getStatefulKnowledgesession();</p><p>           org.jbpm.process.instance.ProcessInstance objProcessInstance = (org.jbpm.process.instance.</p><p>                           ProcessInstance) objKSession.</p><p>                           getProcessInstance(intProcessInstId);</p><p>           VariableScopeInstance objVariableScope = (VariableScopeInstance) objProcessInstance.</p><p>                       getContextInstance(VariableScope.VARIABLE_SCOPE);</p><p>           Iterator<Map.Entry<String, Object>> objIterator = hshVariableMap.entrySet().iterator();</p><p>           Map.Entry<String, Object> objPairs;</p><p>           while(objIterator.hasNext()) {</p><p>            objPairs = (Map.Entry<String, Object>)objIterator.next();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>            objVariableScope.setVariable(objPairs.getKey(), objPairs.getValue());</p><p>           }</p><p>           return null;</p><p>       }</p><p>   });</p><p>  } catch(Exception objException) {</p><p>   objLogger.loggerError(objException);</p><p>  }</p><p> }</p></div>
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