[JBoss jBPM] - Re: Invoke jBPM workflow from external app
by hmuller
Hi there,
I wrote the following class, which will invoke a workflow process. I use this from a servlet which takes normal xml over http (not soap) and then calls the process with the parameters.
| /**
| *
| */
| public class WFProcessFactory {
|
| JbpmConfiguration jbpmConfig = null;
|
| /**
| *
| * @param processId
| * @param processName
| * @param key
| * @param processVariables
| * @param signalStart
| * @return
| */
| public long startProcess(long processId, String processName, String key, HashMap processVariables, boolean signalStart) {
| long tokenId = 0;
|
| if (jbpmConfig == null) {
| jbpmConfig = JbpmConfiguration.getInstance();
| }
| JbpmContext jbpmContext = jbpmConfig.createJbpmContext();
| try {
| // get the session and process definition according to the process id
| GraphSession graphSession = jbpmContext.getGraphSession();
|
| ProcessDefinition processDefinition = null;
| if (processName.length() > 0) {
| processDefinition = graphSession.findLatestProcessDefinition(processName);
| } else {
| processDefinition = graphSession.getProcessDefinition(processId);
| }
|
| // if there are no process variables, then create an empty variable list
| if (processVariables == null) {
| processVariables = new HashMap();
| }
| // startup the process, set its business key (for correlation purposes, and
| // signal it to start going with the flow
| ProcessInstance processInstance = processDefinition.createProcessInstance(processVariables);
|
| processInstance.setKey(key);
| tokenId = processInstance.getRootToken().getId();
| if (signalStart) {
| processInstance.signal();
| }
| } finally {
| jbpmContext.close();
| }
| return tokenId;
| }
| }
|
The XML that I post to my servlet looks something like this.
| Input:
|
| <launch_workflow>
| <process_id>401</process_id> OPTIONAL if process_name is specified
| <process_name>SomeProcessName</process_name> OPTIONAL if process_id is specified
| <process_key>401_00001</process_key>
| <process_input>
| <process_var>
| <var_name>item1</var_name>
| <var_value>value1</var_value>
| </process_var>
| <process_var>
| <var_name>item2</var_name>
| <var_value>value2</var_value>
| </process_var>
| <process_var>
| <var_name>item3</var_name>
| <var_value>value3</var_value>
| </process_var>
| <process_var>
| <var_name>item4</var_name>
| <var_value>value4</var_value>
| </process_var>
| </process_input>
| </launch_workflow>
|
|
| Output:
|
| <launch_result>
| <token_id>499</token_id>
| </launch_result>
|
One thing to take note of: Don't re-instantiate the JBPMConfiguration object with each call, as this causes the server to run out of memory really quickly.
I hope that this helps.
Regards
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17 years, 9 months
[JBoss jBPM] - Invoke jBPM workflow from external app
by ashishc
Hi All,
I am trying to figure out how can I invoke a jBPM workflow from an external java application because as per my understanding someone has to invoke the start state and then the flow can pass through.
Here is the processdefinition.xml
<?xml version="1.0" encoding="UTF-8"?>
|
| <process-definition xmlns="urn:jbpm.org:jpdl-3.2" name="http-demo-process">
|
| <swimlane name="initiator">
| <assignment actor-id="manager" />
| </swimlane>
| <start-state name="start-state1">
| <task swimlane="initiator" />
| <transition to="node1"></transition>
| </start-state>
| <node name="node1">
| <action class="com.sample.action.MessageActionHandler">
| <message>Sending Message</message>
| </action>
| <transition to="end-state1"></transition>
| </node>
| <end-state name="end-state1"></end-state>
| </process-definition>
If I deploy this code to jbpm-console i can login as a user and invoke this workflow, but instead what i want to do is write a separate java application (public static void main) from which I can invoke this workflow...
Any examples, sample code, links, docs etc will be very helpful...
Thanks
Ashish
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17 years, 9 months