UnionInputGateTest.java example

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.runtime.io.network.partition.consumer;

import org.apache.flink.api.common.JobID;
import org.apache.flink.runtime.io.network.partition.ResultPartitionType;
import org.apache.flink.runtime.jobgraph.IntermediateDataSetID;
import org.apache.flink.runtime.operators.testutils.UnregisteredTaskMetricsGroup;
import org.apache.flink.runtime.taskmanager.TaskActions;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.mock;

public class UnionInputGateTest {

	/**
	 * Tests basic correctness of buffer-or-event interleaving and correct <code>null</code> return
	 * value after receiving all end-of-partition events.
	 *
	 * <p> For buffer-or-event instances, it is important to verify that they have been set off to
	 * the correct logical index.
	 */
	@Test(timeout = 120 * 1000)
	public void testBasicGetNextLogic() throws Exception {
		// Setup
		final String testTaskName = "Test Task";
		final SingleInputGate ig1 = new SingleInputGate(
			testTaskName, new JobID(),
			new IntermediateDataSetID(), ResultPartitionType.PIPELINED,
			0, 3,
			mock(TaskActions.class),
			new UnregisteredTaskMetricsGroup.DummyTaskIOMetricGroup());
		final SingleInputGate ig2 = new SingleInputGate(
			testTaskName, new JobID(),
			new IntermediateDataSetID(), ResultPartitionType.PIPELINED,
			0, 5,
			mock(TaskActions.class),
			new UnregisteredTaskMetricsGroup.DummyTaskIOMetricGroup());

		final UnionInputGate union = new UnionInputGate(new SingleInputGate[]{ig1, ig2});

		assertEquals(ig1.getNumberOfInputChannels() + ig2.getNumberOfInputChannels(), union.getNumberOfInputChannels());

		final TestInputChannel[][] inputChannels = new TestInputChannel[][]{
				TestInputChannel.createInputChannels(ig1, 3),
				TestInputChannel.createInputChannels(ig2, 5)
		};

		inputChannels[0][0].readBuffer(); // 0 => 0
		inputChannels[0][0].readEndOfPartitionEvent(); // 0 => 0
		inputChannels[1][2].readBuffer(); // 2 => 5
		inputChannels[1][2].readEndOfPartitionEvent(); // 2 => 5
		inputChannels[1][0].readBuffer(); // 0 => 3
		inputChannels[1][1].readBuffer(); // 1 => 4
		inputChannels[0][1].readBuffer(); // 1 => 1
		inputChannels[1][3].readBuffer(); // 3 => 6
		inputChannels[0][1].readEndOfPartitionEvent(); // 1 => 1
		inputChannels[1][3].readEndOfPartitionEvent(); // 3 => 6
		inputChannels[0][2].readBuffer(); // 1 => 2
		inputChannels[0][2].readEndOfPartitionEvent(); // 1 => 2
		inputChannels[1][4].readBuffer(); // 4 => 7
		inputChannels[1][4].readEndOfPartitionEvent(); // 4 => 7
		inputChannels[1][1].readEndOfPartitionEvent(); // 0 => 3
		inputChannels[1][0].readEndOfPartitionEvent(); // 0 => 3

		ig1.notifyChannelNonEmpty(inputChannels[0][0].getInputChannel());
		ig1.notifyChannelNonEmpty(inputChannels[0][1].getInputChannel());
		ig1.notifyChannelNonEmpty(inputChannels[0][2].getInputChannel());

		ig2.notifyChannelNonEmpty(inputChannels[1][0].getInputChannel());
		ig2.notifyChannelNonEmpty(inputChannels[1][1].getInputChannel());
		ig2.notifyChannelNonEmpty(inputChannels[1][2].getInputChannel());
		ig2.notifyChannelNonEmpty(inputChannels[1][3].getInputChannel());
		ig2.notifyChannelNonEmpty(inputChannels[1][4].getInputChannel());

		SingleInputGateTest.verifyBufferOrEvent(union, true, 0); // gate 1, channel 0
		SingleInputGateTest.verifyBufferOrEvent(union, true, 3); // gate 2, channel 0
		SingleInputGateTest.verifyBufferOrEvent(union, true, 1); // gate 1, channel 1
		SingleInputGateTest.verifyBufferOrEvent(union, true, 4); // gate 2, channel 1
		SingleInputGateTest.verifyBufferOrEvent(union, true, 2); // gate 1, channel 2
		SingleInputGateTest.verifyBufferOrEvent(union, true, 5); // gate 2, channel 1
		SingleInputGateTest.verifyBufferOrEvent(union, false, 0); // gate 1, channel 0
		SingleInputGateTest.verifyBufferOrEvent(union, true, 6); // gate 2, channel 1
		SingleInputGateTest.verifyBufferOrEvent(union, false, 1); // gate 1, channel 1
		SingleInputGateTest.verifyBufferOrEvent(union, true, 7); // gate 2, channel 1
		SingleInputGateTest.verifyBufferOrEvent(union, false, 2); // gate 1, channel 2
		SingleInputGateTest.verifyBufferOrEvent(union, false, 3); // gate 2, channel 0
		SingleInputGateTest.verifyBufferOrEvent(union, false, 4); // gate 2, channel 1
		SingleInputGateTest.verifyBufferOrEvent(union, false, 5); // gate 2, channel 2
		SingleInputGateTest.verifyBufferOrEvent(union, false, 6); // gate 2, channel 3
		SingleInputGateTest.verifyBufferOrEvent(union, false, 7); // gate 2, channel 4

		// Return null when the input gate has received all end-of-partition events
		assertTrue(union.isFinished());
		assertNull(union.getNextBufferOrEvent());
	}
}