Examples of org.apache.oodt.cas.workflow.engine.IterativeWorkflowProcessorThread

Package org.apache.oodt.cas.workflow.engine

Examples of org.apache.oodt.cas.workflow.engine.IterativeWorkflowProcessorThread

org.apache.oodt.cas.workflow.engine.IterativeWorkflowProcessorThread
@author mattmann @version $Revision$
An instance of the {@link WorkflowProcessorThread} that processes through aniterative {@link WorkflowInstance}. This class keeps an Iterator that allows it to move from one end of a sequential {@link Workflow} processing pipeline to another. This class should only beused to process science pipeline style {@link Workflow}s, i.e., those which resemble an iterative processing pipelines, with no forks, or concurrent task executions.

   * org.apache.oodt.cas.workflow.engine.WorkflowEngine#pauseWorkflowInstance
   * (java.lang.String)
   */
  public synchronized void pauseWorkflowInstance(String workflowInstId) {
    // okay, try and look up that worker thread in our hash map
    IterativeWorkflowProcessorThread worker = (IterativeWorkflowProcessorThread) workerMap
        .get(workflowInstId);
    if (worker == null) {
      LOG.log(Level.WARNING,
          "WorkflowEngine: Attempt to pause workflow instance id: "
              + workflowInstId
              + ", however, this engine is not tracking its execution");
      return;
    }


    // otherwise, all good
    worker.pause();


  }

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   * org.apache.oodt.cas.workflow.engine.WorkflowEngine#resumeWorkflowInstance
   * (java.lang.String)
   */
  public synchronized void resumeWorkflowInstance(String workflowInstId) {
    // okay, try and look up that worker thread in our hash map
    IterativeWorkflowProcessorThread worker = (IterativeWorkflowProcessorThread) workerMap
        .get(workflowInstId);
    if (worker == null) {
      LOG.log(Level.WARNING,
          "WorkflowEngine: Attempt to resume workflow instance id: "
              + workflowInstId + ", however, this engine is "
              + "not tracking its execution");
      return;
    }


    // also check to make sure that the worker is currently paused
    // only can resume WorkflowInstances that are paused, right?
    if (!worker.isPaused()) {
      LOG.log(Level.WARNING,
          "WorkflowEngine: Attempt to resume a workflow that "
              + "isn't paused currently: instance id: " + workflowInstId);
      return;
    }


    // okay, all good
    worker.resume();


  }

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        .getTaskId());
    wInst.setSharedContext(metadata);
    wInst.setStatus(CREATED);
    persistWorkflowInstance(wInst);


    IterativeWorkflowProcessorThread worker = new IterativeWorkflowProcessorThread(
        wInst, instRep, this.wmgrUrl);
    worker.setRClient(rClient);
    workerMap.put(wInst.getId(), worker);


    wInst.setStatus(QUEUED);
    persistWorkflowInstance(wInst);

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   * org.apache.oodt.cas.workflow.engine.WorkflowEngine#updateMetadata(java.
   * lang.String, org.apache.oodt.cas.metadata.Metadata)
   */
  public synchronized boolean updateMetadata(String workflowInstId, Metadata met) {
    // okay, try and look up that worker thread in our hash map
    IterativeWorkflowProcessorThread worker = (IterativeWorkflowProcessorThread) workerMap
        .get(workflowInstId);
    if (worker == null) {
      LOG.log(Level.WARNING,
          "WorkflowEngine: Attempt to update metadata context "
              + "for workflow instance id: " + workflowInstId
              + ", however, this engine is " + "not tracking its execution");
      return false;
    }


    worker.getWorkflowInstance().setSharedContext(met);
    try {
      persistWorkflowInstance(worker.getWorkflowInstance());
    } catch (Exception e) {
      LOG.log(
          Level.WARNING,
          "Exception persisting workflow instance: ["
              + worker.getWorkflowInstance().getId() + "]: Message: "
              + e.getMessage());
      return false;
    }


    return true;

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   * org.apache.oodt.cas.workflow.engine.WorkflowEngine#stopWorkflow(java.lang
   * .String)
   */
  public synchronized void stopWorkflow(String workflowInstId) {
    // okay, try and look up that worker thread in our hash map
    IterativeWorkflowProcessorThread worker = (IterativeWorkflowProcessorThread) workerMap
        .get(workflowInstId);
    if (worker == null) {
      LOG.log(Level.WARNING,
          "WorkflowEngine: Attempt to stop workflow instance id: "
              + workflowInstId + ", however, this engine is "
              + "not tracking its execution");
      return;
    }


    worker.stop();
  }

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   * org.apache.oodt.cas.workflow.engine.WorkflowEngine#getWorkflowInstanceMetadata
   * (java.lang.String)
   */
  public Metadata getWorkflowInstanceMetadata(String workflowInstId) {
    // okay, try and look up that worker thread in our hash map
    IterativeWorkflowProcessorThread worker = (IterativeWorkflowProcessorThread) workerMap
        .get(workflowInstId);
    if (worker == null) {
      // try and get the metadata
      // from the workflow instance repository (as it was persisted)
      try {
        WorkflowInstance inst = instRep.getWorkflowInstanceById(workflowInstId);
        return inst.getSharedContext();
      } catch (InstanceRepositoryException e) {
        LOG.log(Level.FINEST, "WorkflowEngine: Attempt to get metadata "
            + "for workflow instance id: " + workflowInstId
            + ", however, this engine is "
            + "not tracking its execution and the id: [" + workflowInstId
            + "] " + "was never persisted to " + "the instance repository");
        e.printStackTrace();
        return new Metadata();
      }
    }


    return worker.getWorkflowInstance().getSharedContext();
  }

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