I need tutorials to help me configure and get task list.

Question

hello,
In my current use case scenario i would have to do simple task like fetch TASK list and MODIFY A Human Task.
I plan to use the wsdl <oracle_home>\bpel\system\services\schema
It would be great if we have some good links to get started.
Thanks,
Sun

Answer 1

I am using workflow API to develop the use cases and this code seems to work.
import java.util.ArrayList;
import java.util.List;
import org.apache.log4j.Logger;
import oracle.bpel.services.workflow.client.IWorkflowServiceClient;
import oracle.bpel.services.workflow.client.WorkflowServiceClientFactory;
import oracle.bpel.services.workflow.query.ITaskQueryService;
import com.oracle.services.bpel.task.Task;
import oracle.bpel.services.workflow.repos.Ordering;
import oracle.bpel.services.workflow.repos.Predicate;
import oracle.bpel.services.workflow.repos.TableConstants;
import oracle.bpel.services.workflow.task.ITaskService;
import oracle.bpel.services.workflow.verification.IWorkflowContext;
public class TaskImpl {
     private static org.apache.log4j.Logger log = Logger
     .getLogger(TaskImpl.class);
     public void getTask(){
          System.out.println(" classpath : " + System.getProperty("java.class.path") );
          try {
               //Create JAVA WorflowServiceClient
               IWorkflowServiceClient wfSvcClient =
               WorkflowServiceClientFactory.getWorkflowServiceClient(WorkflowServiceClientFactory.SOAP_CLIENT);
                    //Get the task query service
               ITaskQueryService querySvc = wfSvcClient.getTaskQueryService();
               //Login as jcooper, jstein or jcooper or weblogic
               IWorkflowContext ctx = querySvc.authenticate("weblogic",
               "weblogic",
               null, //Use default realm
               null);//Not logging in on behalf of another user
               //Set up list of columns to query
               List queryColumns = new ArrayList();
               queryColumns.add("TASKID");
               queryColumns.add("TASKNUMBER");
               queryColumns.add("TITLE");
               queryColumns.add("OUTCOME");
               //Create a predicate to query tasks that have a null outcome
               String outcome = null;
               Predicate predicate = new Predicate(TableConstants.WFTASK_OUTCOME_COLUMN,
               Predicate.OP_EQ,
               outcome);
               //Create an ordering to order tasks by task number
               Ordering ordering = new Ordering(TableConstants.WFTASK_TASKNUMBER_COLUMN
               ,true //Ascending order
               ,false //Nulls last
               //Query a list of tasks assigned to jstein
               List tasks = querySvc.queryTasks(ctx,
               queryColumns,
               null, //Do not query additional info
               ITaskQueryService.ASSIGNMENT_FILTER_MY,
               null, //No keywords
               predicate, //Only tasks with no outome set
               ordering, //Order by ascending task number
               0, //Do not page the query result
               0);
               //Get the task service
               ITaskService taskSvc = wfSvcClient.getTaskService();
               //Loop over the tasks, outputting task information, and approving tasks
               for(int i = 0 ; i < tasks.size() ; i ++)
               Task task = (Task)tasks.get(i);
               int taskNumber = Integer.parseInt(task.getTaskId());
               String title = task.getTitle();
               String taskId = task.getTitle();
               //Set the outcome
               taskSvc.updateTaskOutcome(ctx,taskId,"APPROVED");
               System.out.println("Task #"+taskNumber+" ("+title+") is APPROVED");
               catch (Exception e)
               //Handle any exceptions raised here...
               System.out.println("Caught workflow exception: "+e.getMessage());
}