Java TaskConfig.usesConvergenceCriterion方法代碼示例

import org.apache.flink.runtime.operators.util.TaskConfig; //導入方法依賴的package包/類
@Override
public void invoke() throws Exception {
	this.headEventReader = new MutableRecordReader<>(
			getEnvironment().getInputGate(0),
			getEnvironment().getTaskManagerInfo().getTmpDirectories());

	TaskConfig taskConfig = new TaskConfig(getTaskConfiguration());

	// store all aggregators
	this.aggregators = new HashMap<>();
	for (AggregatorWithName<?> aggWithName : taskConfig.getIterationAggregators(getUserCodeClassLoader())) {
		aggregators.put(aggWithName.getName(), aggWithName.getAggregator());
	}

	// store the aggregator convergence criterion
	if (taskConfig.usesConvergenceCriterion()) {
		convergenceCriterion = taskConfig.getConvergenceCriterion(getUserCodeClassLoader());
		convergenceAggregatorName = taskConfig.getConvergenceCriterionAggregatorName();
		Preconditions.checkNotNull(convergenceAggregatorName);
	}

	// store the default aggregator convergence criterion
	if (taskConfig.usesImplicitConvergenceCriterion()) {
		implicitConvergenceCriterion = taskConfig.getImplicitConvergenceCriterion(getUserCodeClassLoader());
		implicitConvergenceAggregatorName = taskConfig.getImplicitConvergenceCriterionAggregatorName();
		Preconditions.checkNotNull(implicitConvergenceAggregatorName);
	}

	maxNumberOfIterations = taskConfig.getNumberOfIterations();

	// set up the event handler
	int numEventsTillEndOfSuperstep = taskConfig.getNumberOfEventsUntilInterruptInIterativeGate(0);
	eventHandler = new SyncEventHandler(numEventsTillEndOfSuperstep, aggregators,
			getEnvironment().getUserClassLoader());
	headEventReader.registerTaskEventListener(eventHandler, WorkerDoneEvent.class);

	IntValue dummy = new IntValue();

	while (!terminationRequested()) {

		if (log.isInfoEnabled()) {
			log.info(formatLogString("starting iteration [" + currentIteration + "]"));
		}

		// this call listens for events until the end-of-superstep is reached
		readHeadEventChannel(dummy);

		if (log.isInfoEnabled()) {
			log.info(formatLogString("finishing iteration [" + currentIteration + "]"));
		}

		if (checkForConvergence()) {
			if (log.isInfoEnabled()) {
				log.info(formatLogString("signaling that all workers are to terminate in iteration ["
					+ currentIteration + "]"));
			}

			requestTermination();
			sendToAllWorkers(new TerminationEvent());
		} else {
			if (log.isInfoEnabled()) {
				log.info(formatLogString("signaling that all workers are done in iteration [" + currentIteration
					+ "]"));
			}

			AllWorkersDoneEvent allWorkersDoneEvent = new AllWorkersDoneEvent(aggregators);
			sendToAllWorkers(allWorkersDoneEvent);

			// reset all aggregators
			for (Aggregator<?> agg : aggregators.values()) {
				agg.reset();
			}
			currentIteration++;
		}
	}
}
 

import org.apache.flink.runtime.operators.util.TaskConfig; //導入方法依賴的package包/類
@Override
	public void invoke() throws Exception {
		TaskConfig taskConfig = new TaskConfig(getTaskConfiguration());
		
		// store all aggregators
		this.aggregators = new HashMap<String, Aggregator<?>>();
		for (AggregatorWithName<?> aggWithName : taskConfig.getIterationAggregators(getUserCodeClassLoader())) {
			aggregators.put(aggWithName.getName(), aggWithName.getAggregator());
		}
		
		// store the aggregator convergence criterion
		if (taskConfig.usesConvergenceCriterion()) {
			convergenceCriterion = taskConfig.getConvergenceCriterion(getUserCodeClassLoader());
			convergenceAggregatorName = taskConfig.getConvergenceCriterionAggregatorName();
			Preconditions.checkNotNull(convergenceAggregatorName);
		}
		
		maxNumberOfIterations = taskConfig.getNumberOfIterations();
		
		// set up the event handler
		int numEventsTillEndOfSuperstep = taskConfig.getNumberOfEventsUntilInterruptInIterativeGate(0);
		eventHandler = new SyncEventHandler(numEventsTillEndOfSuperstep, aggregators,
				getEnvironment().getUserClassLoader());
		headEventReader.subscribeToEvent(eventHandler, WorkerDoneEvent.class);

		IntegerRecord dummy = new IntegerRecord();
		
		while (!terminationRequested()) {

//			notifyMonitor(IterationMonitoring.Event.SYNC_STARTING, currentIteration);
			if (log.isInfoEnabled()) {
				log.info(formatLogString("starting iteration [" + currentIteration + "]"));
			}

			// this call listens for events until the end-of-superstep is reached
			readHeadEventChannel(dummy);

			if (log.isInfoEnabled()) {
				log.info(formatLogString("finishing iteration [" + currentIteration + "]"));
			}

			if (checkForConvergence()) {
				if (log.isInfoEnabled()) {
					log.info(formatLogString("signaling that all workers are to terminate in iteration ["
						+ currentIteration + "]"));
				}

				requestTermination();
				sendToAllWorkers(new TerminationEvent());
//				notifyMonitor(IterationMonitoring.Event.SYNC_FINISHED, currentIteration);
			} else {
				if (log.isInfoEnabled()) {
					log.info(formatLogString("signaling that all workers are done in iteration [" + currentIteration
						+ "]"));
				}

				AllWorkersDoneEvent allWorkersDoneEvent = new AllWorkersDoneEvent(aggregators);
				sendToAllWorkers(allWorkersDoneEvent);
				
				// reset all aggregators
				for (Aggregator<?> agg : aggregators.values()) {
					agg.reset();
				}
				
//				notifyMonitor(IterationMonitoring.Event.SYNC_FINISHED, currentIteration);
				currentIteration++;
			}
		}
	}