Here is my example, it works for my purpose waiting that Jbpm includes its own
feature "children group or nested groups".
In your process definition :
| <swimlane name="start" >
| <assignment class="package.MergeGroupsAssignmentHandler">
| <groupList>aisi;businessTeam</groupList>
| </assignment>
| </swimlane>
|
| <start-state name="launch">
| <task swimlane="start"><controller/></task>
| <transition name="launch.ok" to="init" />
| </start-state>
|
Here is the Handler code :
| package package;
|
| import org.apache.commons.logging.Log;
| import org.apache.commons.logging.LogFactory;
| import org.jbpm.db.JbpmSession;
| import org.jbpm.db.JbpmSessionFactory;
| import org.jbpm.graph.exe.ExecutionContext;
| import org.jbpm.identity.Group;
| import org.jbpm.identity.hibernate.IdentitySession;
| import org.jbpm.taskmgmt.def.AssignmentHandler;
| import org.jbpm.taskmgmt.exe.Assignable;
|
| /**
| * Specific handler to merge some groups, so that the task can be done by
any member of the merged groups.
| *
| * @author Sébastien NOEL - Dexia BIL
| */
| public class MergeGroupsAssignmentHandler implements AssignmentHandler
| {
| /** Fully qualified class name. */
| static private final String FQCN =
MergeGroupsAssignmentHandler.class.getName();
|
| /** Our logger. */
| static private Log log =
LogFactory.getLog(MergeGroupsAssignmentHandler.class);
|
| /** Configuration given by the handler definition in the process
definition. It must be a semi colon separated values like "group1;group2". */
| public String groupList = null;
|
| /** Required for serialization. */
| static private final long serialVersionUID = 1L;
|
|
| /**
| * Check the <code>groupsName</code> values. They should be a list of
existing groups.
| * @exception Exception Thrown if check failed.
| */
| private void checkGroupList(String[] groupsName) throws Exception
| {
| if (groupsName == null) {
| throw new Exception("groupsName parameter is null");
| }
|
| JbpmSession jbpmSession =
JbpmSessionFactory.getInstance().openJbpmSession();
| jbpmSession.beginTransaction(); // really needed in Read only
mode ? But no overhead (even not 1 ms !)
| IdentitySession iSession = new
IdentitySession(jbpmSession.getSession());
| for (int idx = 0; idx < groupsName.length; idx++) {
| Group group = iSession.getGroupByName(groupsName[idx]);
| if (group == null) {
| throw new Exception("Check your handler
configuration : group called '"+ groupsName[idx]+"' can't be found in the
system.");
| }
| }
| jbpmSession.commitTransaction();
| jbpmSession.close();
|
| }
|
| /** Basic constructor. It is called at each access to this handler
mechanism. */
| public MergeGroupsAssignmentHandler() {
| }
|
| /**
| * Splits the configuration into an array of group name.
| *
| * @exception Exception Thrown on incorrect configuration.
| */
| private String[] analyseConfiguration() throws Exception
| {
| final String localMethodName = FQCN +
".analyseConfiguration()";
| if (this.groupList == null || "".equals(this.groupList.trim()))
{
| throw new Exception("Handler configuration incorrect :
expected group list for parameter groupList='"+ this.groupList +"' ("+
localMethodName +")");
| }
|
| String[] tokens = this.groupList.split(";");
| if (log.isDebugEnabled()) {
| StringBuffer sb = new StringBuffer();
| for (int idx=0; idx < tokens.length; idx++) {
| sb.append("'").append(tokens[idx]).append("',
");
| }
| log.debug(localMethodName + " Found from configuration
: ["+ sb.toString() + "].");
| }
|
| return tokens;
| }
|
| /**
| * Concatenates all the groups name given by [EMAIL PROTECTED]
#groupList} into the <code>assignable</code>.
| */
| public void assign(Assignable assignable, ExecutionContext
executionContext) throws Exception
| {
| long start = System.currentTimeMillis();
| final String localMethodName = FQCN + ".assign(Assignable
assignable, ExecutionContext executionContext)";
|
| String[] groupsName = analyseConfiguration();
| checkGroupList(groupsName);
| assignable.setPooledActors(groupsName);
|
| log.debug(localMethodName + "Time elapsed : "+
(System.currentTimeMillis() - start) +" ms.");
| }
| }
|
I hope this could help ...
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