Java IntCounter.add方法代码示例

import org.apache.flink.api.common.accumulators.IntCounter; //导入方法依赖的package包/类
@Test
public void stringifyingResultsShouldIncorporateAccumulatorLocalValueDirectly() {
	final String name = "a";
	final int targetValue = 314159;
	final IntCounter acc = new IntCounter();
	acc.add(targetValue);
	final Map<String, Accumulator<?, ?>> accumulatorMap = new HashMap<>();
	accumulatorMap.put(name, acc);

	final StringifiedAccumulatorResult[] results = StringifiedAccumulatorResult.stringifyAccumulatorResults(accumulatorMap);

	assertEquals(1, results.length);

	final StringifiedAccumulatorResult firstResult = results[0];
	assertEquals(name, firstResult.getName());
	assertEquals("IntCounter", firstResult.getType());
	assertEquals(Integer.toString(targetValue), firstResult.getValue());
}
 

import org.apache.flink.api.common.accumulators.IntCounter; //导入方法依赖的package包/类
@Override
public void open(Configuration parameters) {

	// Add counters using convenience functions
	this.cntNumLines = getRuntimeContext().getIntCounter("num-lines");
	this.wordsPerLineDistribution = getRuntimeContext().getHistogram("words-per-line");

	// Add built-in accumulator without convenience function
	getRuntimeContext().addAccumulator("open-close-counter", this.openCloseCounter);

	// Add custom counter
	this.distinctWords = new SetAccumulator<>();
	this.getRuntimeContext().addAccumulator("distinct-words", distinctWords);

	// Create counter and test increment
	IntCounter simpleCounter = getRuntimeContext().getIntCounter("simple-counter");
	simpleCounter.add(1);
	Assert.assertEquals(simpleCounter.getLocalValue().intValue(), 1);

	// Test if we get the same counter
	IntCounter simpleCounter2 = getRuntimeContext().getIntCounter("simple-counter");
	Assert.assertEquals(simpleCounter.getLocalValue(), simpleCounter2.getLocalValue());

	// Should fail if we request it with different type
	try {
		@SuppressWarnings("unused")
		DoubleCounter simpleCounter3 = getRuntimeContext().getDoubleCounter("simple-counter");
		// DoubleSumAggregator longAggregator3 = (DoubleSumAggregator)
		// getRuntimeContext().getAggregator("custom",
		// DoubleSumAggregator.class);
		Assert.fail("Should not be able to obtain previously created counter with different type");
	}
	catch (UnsupportedOperationException ex) {
		// expected!
	}

	// Test counter used in open() and closed()
	this.openCloseCounter.add(0.5);
}
 

import org.apache.flink.api.common.accumulators.IntCounter; //导入方法依赖的package包/类
@Override
public void open(Configuration parameters) {
  
	// Add counters using convenience functions
	this.cntNumLines = getRuntimeContext().getIntCounter("num-lines");
	this.wordsPerLineDistribution = getRuntimeContext().getHistogram("words-per-line");

	// Add built-in accumulator without convenience function
	getRuntimeContext().addAccumulator("open-close-counter", this.openCloseCounter);

	// Add custom counter. Didn't find a way to do this with
	// getAccumulator()
	this.distinctWords = new SetAccumulator<StringValue>();
	this.getRuntimeContext().addAccumulator("distinct-words", distinctWords);

	// Create counter and test increment
	IntCounter simpleCounter = getRuntimeContext().getIntCounter("simple-counter");
	simpleCounter.add(1);
	Assert.assertEquals(simpleCounter.getLocalValue().intValue(), 1);

	// Test if we get the same counter
	IntCounter simpleCounter2 = getRuntimeContext().getIntCounter("simple-counter");
	Assert.assertEquals(simpleCounter.getLocalValue(), simpleCounter2.getLocalValue());

	// Should fail if we request it with different type
	try {
		@SuppressWarnings("unused")
		DoubleCounter simpleCounter3 = getRuntimeContext().getDoubleCounter("simple-counter");
		// DoubleSumAggregator longAggregator3 = (DoubleSumAggregator)
		// getRuntimeContext().getAggregator("custom",
		// DoubleSumAggregator.class);
		Assert.fail("Should not be able to obtain previously created counter with different type");
	} catch (UnsupportedOperationException ex) {
	}

	// Test counter used in open() and closed()
	this.openCloseCounter.add(0.5);
}