The Imixs Workflow Engine

After you have defined your business model and created a workitem containing your business data you can run the Imixs Workflow engine to process the workitem. When a workitem is processed by the workflow engine the workitem becomes a process instance of the current workflow process. From this moment the workflow engine controls the workitem until the business process is completed.

Run the workflow engine

A workitem can be processed by calling the method processWorkItem() from the WorkflowService. As the Imixs-Workflow Engine is based on Java EE you can inject the WorklowService with the @EJB annotation. This is a simple example:

import org.imixs.workflow.ItemCollection;
private org.imixs.workflow.jee.ejb.WorkflowService workflowService;
// create a workitem
ItemCollection workitem=new ItemCollection();
workitem.replaceItemValue("age",new Integer(40));
// assigen a workflow model
// process the workitem
workitem = workflowService.processWorkItem(workitem);

After you have processed a Workitem you can evaluate the workflow data, provided by the workflow engine:

// get the assigend workitem unique id...
String uniqueID=workitem.getItemValueInteger("$UniqueID");
// read the current workflow status
String status=workitem.getItemValueString("txtWorkflowStatus");

With the uniqueID of a processed workitem you can fetch the process instance from the WorkflowService:

// load a process instance by the unique id...

Also you can fetch a list of all workitems assigned to the current user. This list is typical called the ‘task list’

// get all workitems for the current user...
Collection<ItemCollection> tasklist = workflowService.getWorkList(null, 0,
         -1, 0);

The Imixs WorkflowServce provides a lot of methods to manage workitems processed by the workflow engine. See the workflow engine section for more details.