Examples of FlowStepStrategy

cascading.flow.FlowStepStrategy

The FlowStepStrategy interface allows for on the fly customization of {@link cascading.flow.FlowStep} configuration valuesbefore they are submitted to the underlying platform.

Use a strategy instance to change the display name for a job, or in the case of Hadoop, the number of mapper or reducer instances.

Note, to change the configuration information, {@link cascading.flow.FlowStep#getConfig()} must becalled to get access to the current configuration.

If any, the completed predecessor steps are provided so that the predecessors can be inspected via the {@link cascading.stats.FlowStepStats} interface for any information that may influence the current job.

It is also possible to block submission of the job by blocking in this method.

    internalCleanup();
    }


  private void applyFlowStepConfStrategy()
    {
    FlowStepStrategy flowStepStrategy = flowStep.getFlow().getFlowStepStrategy();


    if( flowStepStrategy == null )
      return;


    List<FlowStep> predecessorSteps = new ArrayList<FlowStep>();


    for( FlowStepJob predecessor : predecessors )
      predecessorSteps.add( predecessor.flowStep );


    flowStepStrategy.apply( flowStep.getFlow(), predecessorSteps, flowStep );
    }

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Examples of FlowStepStrategy

Examples of cascading.flow.FlowStepStrategy