Examples of org.apache.tez.dag.api.VertexLocationHint

org.apache.tez.dag.api.VertexLocationHint
Describes the placements hints for tasks in a vertex. The system will make a best-effort attempt to run the tasks close to the specified locations.

        Preconditions
            .checkState(context.getVertexNumTasks(context.getVertexName()) == -1,
                "Parallelism for the vertex should be set to -1 if the InputInitializer is setting parallelism");
        RootInputConfigureVertexTasksEvent cEvent = (RootInputConfigureVertexTasksEvent) event;
        context.setVertexParallelism(cEvent.getNumTasks(),
            new VertexLocationHint(cEvent.getTaskLocationHints()), null);
      }
      if (event instanceof RootInputUpdatePayloadEvent) {
        // No tasks should have been started yet. Checked by initial state check.
        Preconditions.checkState(dataInformationEventSeen == false);
        inputDescriptor.setUserPayload(((RootInputUpdatePayloadEvent) event)

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  private static VertexImpl createVertex(DAGImpl dag, String vertexName, int vId) {
    TezVertexID vertexId = TezBuilderUtils.newVertexID(dag.getID(), vId);


    VertexPlan vertexPlan = dag.getJobPlan().getVertex(vId);
    VertexLocationHint vertexLocationHint = DagTypeConverters
        .convertFromDAGPlan(vertexPlan.getTaskLocationHintList());


    VertexImpl v = new VertexImpl(
        vertexId, vertexPlan, vertexName, dag.conf,
        dag.eventHandler, dag.taskAttemptListener,

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