Can we call a workflow form a JSP and/or form a Java Class?

Question

Is it possible to call a workflow form a JSP and/or form a Java Class?

Answer 1

Below is some xpress code I wrote once, used to dynamically lauch workflows from within a workflow. Since it basically uses java classes, you reuse these in your java program or jsp:
- create a new generic object
- call the setId, put, ... methods on it
- set the input variables for the workflow by putting them into the generic object
- call the checkinView method on a LighthouseContext object which launches your workflow.
If all you need is starting a workflow from a jsp, you might also want to take a look at the tasks/taskLaunch.jsp jsp. This is an out of the box jsp which allows launching of tasks. If I remember correctly you have to give an url parameter which specificies the name of task you want to start: tasks/taskLaunch.jsp?id=<workflow-name>
- Robin
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE TaskDefinition PUBLIC 'waveset.dtd' 'waveset.dtd'>
<TaskDefinition name="MVG_TD_LaunchWorkflow" taskType="Workflow" executor="com.waveset.workflow.WorkflowExecutor" suspendable="true" syncControlAllowed="true" execMode="sync" execLimit="0" resultLimit="0" resultOption="delete" visibility="runschedule" progressInterval="0">
     <Extension>
          <WFProcess name="MVG_TD_LaunchWorkflow">
               <Variable name="workflowName" input="true"/>
               <Variable name="taskInstanceName" input="true"/>
               <Variable name="inputs" input="true"/>
               <Variable name="processView"/>
               <Activity name="start">
                    <Transition to="createProcessView"/>
               </Activity>
               <Activity name="createProcessView">
                    <Action>
                         <block trace="true">
                              <set name="processView">
                                   <new class="com.waveset.object.GenericObject"/>
                              </set>
                              <invoke name="setId">
                                   <ref>processView</ref>
                                   <s>ProcessViewer</s>
                              </invoke>
                              <invoke name="put">
                                   <ref>processView</ref>
                                   <s>task.process</s>
                                   <ref>workflowName</ref>
                              </invoke>
                              <invoke name="put">
                                   <ref>processView</ref>
                                   <s>task.taskName</s>
                                   <ref>taskInstanceName</ref>
                              </invoke>
                              <if>
                                   <notnull>
                                        <ref>inputs</ref>
                                   </notnull>
                                   <then>
                                        <invoke name="assimilate">
                                             <ref>processView</ref>
                                             <ref>inputs</ref>
                                        </invoke>
                                   </then>
                              </if>          
                         </block>
                    </Action>
                    <Transition to="checkInProcessView"/>
               </Activity>
               <Activity name="checkInProcessView">
                    <Action>
                         <block trace="true">
                         <invoke name="checkinView">
                              <invoke name="getLighthouseContext">
                                   <ref>WF_CONTEXT</ref>
                              </invoke>
                              <ref>processView</ref>
                              <new class="java.util.HashMap"/>
                         </invoke>
                         </block>
                    </Action>
                    <Transition to="end"/>
               </Activity>
               <Activity name="end"/>
          </WFProcess>
     </Extension>
     <MemberObjectGroups>
          <ObjectRef type="ObjectGroup" id="#ID#Top" name="Top"/>
     </MemberObjectGroups>
</TaskDefinition>