Examples of com.google.appengine.tools.pipeline.impl.model.Barrier

Package com.google.appengine.tools.pipeline.impl.model

Examples of com.google.appengine.tools.pipeline.impl.model.Barrier

com.google.appengine.tools.pipeline.impl.model.Barrier
A {@code Barrier} represents a list of slots that need to be filled beforesomething is allowed to happen.
There are two types of barriers, run barriers and finalize barriers. A run barrier is used to trigger the running of a job. Its list of slots represent arguments to the job. A finalize barrier is used to trigger the finalization of a job. It has only one slot which is used as the output value of the job. The essential properties are:
- type: Either run or finalize
- jobKey: The datastore key of the associated job
- waitingOn: A list of the datastore keys of the slots for which this barrier is waiting
- released: A boolean representing whether or not this barrier is released. Released means that all of the slots are filled and so the action associated with this barrier should be triggered.
@author rudominer@google.com (Mitch Rudominer)

  public JobRecord queryJob(Key jobKey, JobRecord.InflationType inflationType)
      throws NoSuchObjectException {
    try {
      Entity entity = transactionallyQueryEntity(jobKey);
      JobRecord jobRecord = new JobRecord(entity);
      Barrier runBarrier = null;
      Barrier finalizeBarrier = null;
      Slot outputSlot = null;
      JobInstanceRecord jobInstanceRecord = null;
      switch (inflationType) {
        case FOR_RUN:
          runBarrier = queryBarrier(jobRecord.getRunBarrierKey(), true, true);

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    if (startNewTransaction) {
      entity = transactionallyQueryEntity(barrierKey);
    } else {
      entity = queryEntity(barrierKey);
    }
    Barrier barrier = new Barrier(entity);
    if (inflate) {
      Collection<Barrier> barriers = new ArrayList<Barrier>(1);
      barriers.add(barrier);
      inflateBarriers(barriers);
    }

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    Slot slot = new Slot(entity);
    if (inflate) {
      Map<Key, Entity> entities = getAll(slot.getWaitingOnMeKeys());
      Map<Key, Barrier> barriers = new HashMap<Key, Barrier>(entities.size());
      for (Map.Entry<Key, Entity> entry : entities.entrySet()) {
        barriers.put(entry.getKey(), new Barrier(entry.getValue()));
      }
      slot.inflate(barriers);
      inflateBarriers(barriers.values());
    }
    return slot;

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    final Map<Key, Barrier> barriers = new HashMap<Key, Barrier>();
    final Map<Key, JobInstanceRecord> jobInstanceRecords = new HashMap<Key, JobInstanceRecord>();
    putAll(barriers, new Instantiator<Barrier>() {
      @Override
      public Barrier newObject(Entity entity) {
        return new Barrier(entity);
      }
    }, Barrier.DATA_STORE_KIND, rootJobKey);
    putAll(slots, new Instantiator<Slot>() {
      @Override
      public Slot newObject(Entity entity) {

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com.google.appengine.api.datastore.Key

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