Java Code Examples for org.apache.flink.runtime.jobgraph.OperatorID#equals()

The following examples show how to use org.apache.flink.runtime.jobgraph.OperatorID#equals() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: OneInputStreamTaskTest.java From Flink-CEPplus with Apache License 2.0

4 votes

@Test
public void testWatermarkMetrics() throws Exception {
	final OneInputStreamTaskTestHarness<String, String> testHarness = new OneInputStreamTaskTestHarness<>(OneInputStreamTask::new, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO);

	OneInputStreamOperator<String, String> headOperator = new WatermarkMetricOperator();
	OperatorID headOperatorId = new OperatorID();

	OneInputStreamOperator<String, String> chainedOperator = new WatermarkMetricOperator();
	OperatorID chainedOperatorId = new OperatorID();

	testHarness.setupOperatorChain(headOperatorId, headOperator)
		.chain(chainedOperatorId, chainedOperator, BasicTypeInfo.STRING_TYPE_INFO.createSerializer(new ExecutionConfig()))
		.finish();

	InterceptingOperatorMetricGroup headOperatorMetricGroup = new InterceptingOperatorMetricGroup();
	InterceptingOperatorMetricGroup chainedOperatorMetricGroup = new InterceptingOperatorMetricGroup();
	InterceptingTaskMetricGroup taskMetricGroup = new InterceptingTaskMetricGroup() {
		@Override
		public OperatorMetricGroup getOrAddOperator(OperatorID id, String name) {
			if (id.equals(headOperatorId)) {
				return headOperatorMetricGroup;
			} else if (id.equals(chainedOperatorId)) {
				return chainedOperatorMetricGroup;
			} else {
				return super.getOrAddOperator(id, name);
			}
		}
	};

	StreamMockEnvironment env = new StreamMockEnvironment(
		testHarness.jobConfig, testHarness.taskConfig, testHarness.memorySize, new MockInputSplitProvider(), testHarness.bufferSize, new TestTaskStateManager()) {
		@Override
		public TaskMetricGroup getMetricGroup() {
			return taskMetricGroup;
		}
	};

	testHarness.invoke(env);
	testHarness.waitForTaskRunning();

	Gauge<Long> taskInputWatermarkGauge = (Gauge<Long>) taskMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> headInputWatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> headOutputWatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_OUTPUT_WATERMARK);
	Gauge<Long> chainedInputWatermarkGauge = (Gauge<Long>) chainedOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> chainedOutputWatermarkGauge = (Gauge<Long>) chainedOperatorMetricGroup.get(MetricNames.IO_CURRENT_OUTPUT_WATERMARK);

	Assert.assertEquals("A metric was registered multiple times.",
		5,
		new HashSet<>(Arrays.asList(
			taskInputWatermarkGauge,
			headInputWatermarkGauge,
			headOutputWatermarkGauge,
			chainedInputWatermarkGauge,
			chainedOutputWatermarkGauge))
			.size());

	Assert.assertEquals(Long.MIN_VALUE, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.processElement(new Watermark(1L));
	testHarness.waitForInputProcessing();
	Assert.assertEquals(1L, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(1L, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(4L, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.processElement(new Watermark(2L));
	testHarness.waitForInputProcessing();
	Assert.assertEquals(2L, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(4L, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(4L, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(8L, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.endInput();
	testHarness.waitForTaskCompletion();
}

Example 2

Source File: TwoInputStreamTaskTest.java From Flink-CEPplus with Apache License 2.0

4 votes

@Test
public void testWatermarkMetrics() throws Exception {
	final TwoInputStreamTaskTestHarness<String, Integer, String> testHarness = new TwoInputStreamTaskTestHarness<>(TwoInputStreamTask::new, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.INT_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO);

	CoStreamMap<String, Integer, String> headOperator = new CoStreamMap<>(new IdentityMap());
	final OperatorID headOperatorId = new OperatorID();

	OneInputStreamTaskTest.WatermarkMetricOperator chainedOperator = new OneInputStreamTaskTest.WatermarkMetricOperator();
	OperatorID chainedOperatorId = new OperatorID();

	testHarness.setupOperatorChain(headOperatorId, headOperator)
		.chain(chainedOperatorId, chainedOperator, BasicTypeInfo.STRING_TYPE_INFO.createSerializer(new ExecutionConfig()))
		.finish();

	InterceptingOperatorMetricGroup headOperatorMetricGroup = new InterceptingOperatorMetricGroup();
	InterceptingOperatorMetricGroup chainedOperatorMetricGroup = new InterceptingOperatorMetricGroup();
	InterceptingTaskMetricGroup taskMetricGroup = new InterceptingTaskMetricGroup() {
		@Override
		public OperatorMetricGroup getOrAddOperator(OperatorID id, String name) {
			if (id.equals(headOperatorId)) {
				return headOperatorMetricGroup;
			} else if (id.equals(chainedOperatorId)) {
				return chainedOperatorMetricGroup;
			} else {
				return super.getOrAddOperator(id, name);
			}
		}
	};

	StreamMockEnvironment env = new StreamMockEnvironment(
		testHarness.jobConfig, testHarness.taskConfig, testHarness.memorySize, new MockInputSplitProvider(), testHarness.bufferSize, new TestTaskStateManager()) {
		@Override
		public TaskMetricGroup getMetricGroup() {
			return taskMetricGroup;
		}
	};

	testHarness.invoke(env);
	testHarness.waitForTaskRunning();

	Gauge<Long> taskInputWatermarkGauge = (Gauge<Long>) taskMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> headInput1WatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_1_WATERMARK);
	Gauge<Long> headInput2WatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_2_WATERMARK);
	Gauge<Long> headInputWatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> headOutputWatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_OUTPUT_WATERMARK);
	Gauge<Long> chainedInputWatermarkGauge = (Gauge<Long>) chainedOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> chainedOutputWatermarkGauge = (Gauge<Long>) chainedOperatorMetricGroup.get(MetricNames.IO_CURRENT_OUTPUT_WATERMARK);

	Assert.assertEquals("A metric was registered multiple times.",
		7,
		new HashSet<>(Arrays.asList(
			taskInputWatermarkGauge,
			headInput1WatermarkGauge,
			headInput2WatermarkGauge,
			headInputWatermarkGauge,
			headOutputWatermarkGauge,
			chainedInputWatermarkGauge,
			chainedOutputWatermarkGauge))
			.size());

	Assert.assertEquals(Long.MIN_VALUE, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headInput1WatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headInput2WatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.processElement(new Watermark(1L), 0, 0);
	testHarness.waitForInputProcessing();
	Assert.assertEquals(Long.MIN_VALUE, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(1L, headInput1WatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headInput2WatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.processElement(new Watermark(2L), 1, 0);
	testHarness.waitForInputProcessing();
	Assert.assertEquals(1L, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(1L, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(1L, headInput1WatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, headInput2WatermarkGauge.getValue().longValue());
	Assert.assertEquals(1L, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(1L, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.processElement(new Watermark(3L), 0, 0);
	testHarness.waitForInputProcessing();
	Assert.assertEquals(2L, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(3L, headInput1WatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, headInput2WatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(4L, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.endInput();
	testHarness.waitForTaskCompletion();
}

Example 3

Source File: OneInputStreamTaskTest.java From flink with Apache License 2.0

4 votes

@Test
public void testWatermarkMetrics() throws Exception {
	final OneInputStreamTaskTestHarness<String, String> testHarness = new OneInputStreamTaskTestHarness<>(OneInputStreamTask::new, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO);

	OneInputStreamOperator<String, String> headOperator = new WatermarkMetricOperator();
	OperatorID headOperatorId = new OperatorID();

	OneInputStreamOperator<String, String> chainedOperator = new WatermarkMetricOperator();
	OperatorID chainedOperatorId = new OperatorID();

	testHarness.setupOperatorChain(headOperatorId, headOperator)
		.chain(chainedOperatorId, chainedOperator, BasicTypeInfo.STRING_TYPE_INFO.createSerializer(new ExecutionConfig()))
		.finish();

	InterceptingOperatorMetricGroup headOperatorMetricGroup = new InterceptingOperatorMetricGroup();
	InterceptingOperatorMetricGroup chainedOperatorMetricGroup = new InterceptingOperatorMetricGroup();
	InterceptingTaskMetricGroup taskMetricGroup = new InterceptingTaskMetricGroup() {
		@Override
		public OperatorMetricGroup getOrAddOperator(OperatorID id, String name) {
			if (id.equals(headOperatorId)) {
				return headOperatorMetricGroup;
			} else if (id.equals(chainedOperatorId)) {
				return chainedOperatorMetricGroup;
			} else {
				return super.getOrAddOperator(id, name);
			}
		}
	};

	StreamMockEnvironment env = new StreamMockEnvironment(
		testHarness.jobConfig, testHarness.taskConfig, testHarness.memorySize, new MockInputSplitProvider(), testHarness.bufferSize, new TestTaskStateManager()) {
		@Override
		public TaskMetricGroup getMetricGroup() {
			return taskMetricGroup;
		}
	};

	testHarness.invoke(env);
	testHarness.waitForTaskRunning();

	Gauge<Long> taskInputWatermarkGauge = (Gauge<Long>) taskMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> headInputWatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> headOutputWatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_OUTPUT_WATERMARK);
	Gauge<Long> chainedInputWatermarkGauge = (Gauge<Long>) chainedOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> chainedOutputWatermarkGauge = (Gauge<Long>) chainedOperatorMetricGroup.get(MetricNames.IO_CURRENT_OUTPUT_WATERMARK);

	Assert.assertEquals("A metric was registered multiple times.",
		5,
		new HashSet<>(Arrays.asList(
			taskInputWatermarkGauge,
			headInputWatermarkGauge,
			headOutputWatermarkGauge,
			chainedInputWatermarkGauge,
			chainedOutputWatermarkGauge))
			.size());

	Assert.assertEquals(Long.MIN_VALUE, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.processElement(new Watermark(1L));
	testHarness.waitForInputProcessing();
	Assert.assertEquals(1L, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(1L, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(4L, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.processElement(new Watermark(2L));
	testHarness.waitForInputProcessing();
	Assert.assertEquals(2L, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(4L, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(4L, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(8L, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.endInput();
	testHarness.waitForTaskCompletion();
}

Example 4

Source File: OneInputStreamTaskTest.java From flink with Apache License 2.0

4 votes

@Test
@SuppressWarnings("unchecked")
public void testWatermarkMetrics() throws Exception {
	final OneInputStreamTaskTestHarness<String, String> testHarness = new OneInputStreamTaskTestHarness<>(OneInputStreamTask::new, BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO);

	OneInputStreamOperator<String, String> headOperator = new WatermarkMetricOperator();
	OperatorID headOperatorId = new OperatorID();

	OneInputStreamOperator<String, String> chainedOperator = new WatermarkMetricOperator();
	OperatorID chainedOperatorId = new OperatorID();

	testHarness.setupOperatorChain(headOperatorId, headOperator)
		.chain(chainedOperatorId, chainedOperator, BasicTypeInfo.STRING_TYPE_INFO.createSerializer(new ExecutionConfig()))
		.finish();

	InterceptingOperatorMetricGroup headOperatorMetricGroup = new InterceptingOperatorMetricGroup();
	InterceptingOperatorMetricGroup chainedOperatorMetricGroup = new InterceptingOperatorMetricGroup();
	InterceptingTaskMetricGroup taskMetricGroup = new InterceptingTaskMetricGroup() {
		@Override
		public OperatorMetricGroup getOrAddOperator(OperatorID id, String name) {
			if (id.equals(headOperatorId)) {
				return headOperatorMetricGroup;
			} else if (id.equals(chainedOperatorId)) {
				return chainedOperatorMetricGroup;
			} else {
				return super.getOrAddOperator(id, name);
			}
		}
	};

	StreamMockEnvironment env = new StreamMockEnvironment(
		testHarness.jobConfig, testHarness.taskConfig, testHarness.memorySize, new MockInputSplitProvider(), testHarness.bufferSize, new TestTaskStateManager()) {
		@Override
		public TaskMetricGroup getMetricGroup() {
			return taskMetricGroup;
		}
	};

	testHarness.invoke(env);
	testHarness.waitForTaskRunning();

	Gauge<Long> taskInputWatermarkGauge = (Gauge<Long>) taskMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> headInputWatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> headOutputWatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_OUTPUT_WATERMARK);
	Gauge<Long> chainedInputWatermarkGauge = (Gauge<Long>) chainedOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
	Gauge<Long> chainedOutputWatermarkGauge = (Gauge<Long>) chainedOperatorMetricGroup.get(MetricNames.IO_CURRENT_OUTPUT_WATERMARK);

	Assert.assertEquals("A metric was registered multiple times.",
		5,
		new HashSet<>(Arrays.asList(
			taskInputWatermarkGauge,
			headInputWatermarkGauge,
			headOutputWatermarkGauge,
			chainedInputWatermarkGauge,
			chainedOutputWatermarkGauge))
			.size());

	Assert.assertEquals(Long.MIN_VALUE, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(Long.MIN_VALUE, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.processElement(new Watermark(1L));
	testHarness.waitForInputProcessing();
	Assert.assertEquals(1L, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(1L, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(4L, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.processElement(new Watermark(2L));
	testHarness.waitForInputProcessing();
	Assert.assertEquals(2L, taskInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(2L, headInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(4L, headOutputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(4L, chainedInputWatermarkGauge.getValue().longValue());
	Assert.assertEquals(8L, chainedOutputWatermarkGauge.getValue().longValue());

	testHarness.endInput();
	testHarness.waitForTaskCompletion();
}

Example 5

Source File: MultipleInputStreamTaskTest.java From flink with Apache License 2.0

4 votes

@Test
@SuppressWarnings("unchecked")
public void testWatermarkMetrics() throws Exception {
	OperatorID headOperatorId = new OperatorID();
	OperatorID chainedOperatorId = new OperatorID();

	InterceptingOperatorMetricGroup headOperatorMetricGroup = new InterceptingOperatorMetricGroup();
	InterceptingOperatorMetricGroup chainedOperatorMetricGroup = new InterceptingOperatorMetricGroup();
	InterceptingTaskMetricGroup taskMetricGroup = new InterceptingTaskMetricGroup() {
		@Override
		public OperatorMetricGroup getOrAddOperator(OperatorID id, String name) {
			if (id.equals(headOperatorId)) {
				return headOperatorMetricGroup;
			} else if (id.equals(chainedOperatorId)) {
				return chainedOperatorMetricGroup;
			} else {
				return super.getOrAddOperator(id, name);
			}
		}
	};

	try (StreamTaskMailboxTestHarness<String> testHarness =
			new MultipleInputStreamTaskTestHarnessBuilder<>(MultipleInputStreamTask::new, BasicTypeInfo.STRING_TYPE_INFO)
				.addInput(BasicTypeInfo.STRING_TYPE_INFO)
				.addInput(BasicTypeInfo.INT_TYPE_INFO)
				.addInput(BasicTypeInfo.DOUBLE_TYPE_INFO)
				.setupOperatorChain(headOperatorId, new MapToStringMultipleInputOperatorFactory())
				.chain(
					chainedOperatorId,
					new WatermarkMetricOperator(),
					BasicTypeInfo.STRING_TYPE_INFO.createSerializer(new ExecutionConfig()))
				.finish()
				.setTaskMetricGroup(taskMetricGroup)
				.build()) {
		Gauge<Long> taskInputWatermarkGauge = (Gauge<Long>) taskMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
		Gauge<Long> headInput1WatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.currentInputWatermarkName(1));
		Gauge<Long> headInput2WatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.currentInputWatermarkName(2));
		Gauge<Long> headInput3WatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.currentInputWatermarkName(3));
		Gauge<Long> headInputWatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
		Gauge<Long> headOutputWatermarkGauge = (Gauge<Long>) headOperatorMetricGroup.get(MetricNames.IO_CURRENT_OUTPUT_WATERMARK);
		Gauge<Long> chainedInputWatermarkGauge = (Gauge<Long>) chainedOperatorMetricGroup.get(MetricNames.IO_CURRENT_INPUT_WATERMARK);
		Gauge<Long> chainedOutputWatermarkGauge = (Gauge<Long>) chainedOperatorMetricGroup.get(MetricNames.IO_CURRENT_OUTPUT_WATERMARK);

		assertEquals(Long.MIN_VALUE, taskInputWatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headInputWatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headInput1WatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headInput2WatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headInput3WatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headOutputWatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, chainedInputWatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, chainedOutputWatermarkGauge.getValue().longValue());

		testHarness.processElement(new Watermark(1L), 0);
		assertEquals(Long.MIN_VALUE, taskInputWatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headInputWatermarkGauge.getValue().longValue());
		assertEquals(1L, headInput1WatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headInput2WatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headInput3WatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headOutputWatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, chainedInputWatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, chainedOutputWatermarkGauge.getValue().longValue());

		testHarness.processElement(new Watermark(2L), 1);
		assertEquals(Long.MIN_VALUE, taskInputWatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headInputWatermarkGauge.getValue().longValue());
		assertEquals(1L, headInput1WatermarkGauge.getValue().longValue());
		assertEquals(2L, headInput2WatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headInput3WatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, headOutputWatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, chainedInputWatermarkGauge.getValue().longValue());
		assertEquals(Long.MIN_VALUE, chainedOutputWatermarkGauge.getValue().longValue());

		testHarness.processElement(new Watermark(2L), 2);
		assertEquals(1L, taskInputWatermarkGauge.getValue().longValue());
		assertEquals(1L, headInputWatermarkGauge.getValue().longValue());
		assertEquals(1L, headInput1WatermarkGauge.getValue().longValue());
		assertEquals(2L, headInput2WatermarkGauge.getValue().longValue());
		assertEquals(2L, headInput3WatermarkGauge.getValue().longValue());
		assertEquals(1L, headOutputWatermarkGauge.getValue().longValue());
		assertEquals(1L, chainedInputWatermarkGauge.getValue().longValue());
		assertEquals(2L, chainedOutputWatermarkGauge.getValue().longValue());

		testHarness.processElement(new Watermark(4L), 0);
		testHarness.processElement(new Watermark(3L), 1);
		assertEquals(2L, taskInputWatermarkGauge.getValue().longValue());
		assertEquals(2L, headInputWatermarkGauge.getValue().longValue());
		assertEquals(4L, headInput1WatermarkGauge.getValue().longValue());
		assertEquals(3L, headInput2WatermarkGauge.getValue().longValue());
		assertEquals(2L, headInput3WatermarkGauge.getValue().longValue());
		assertEquals(2L, headOutputWatermarkGauge.getValue().longValue());
		assertEquals(2L, chainedInputWatermarkGauge.getValue().longValue());
		assertEquals(4L, chainedOutputWatermarkGauge.getValue().longValue());

		testHarness.endInput();
		testHarness.waitForTaskCompletion();
	}
}