/*
* Copyright 2015 Netflix, Inc.
*
* Licensed 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 com.netflix.eureka.util.batcher;
import java.util.List;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;
import com.netflix.eureka.util.batcher.TaskProcessor.ProcessingResult;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.notNullValue;
import static org.junit.Assert.assertThat;
/**
* @author Tomasz Bak
*/
public class AcceptorExecutorTest {
private static final long SERVER_UNAVAILABLE_SLEEP_TIME_MS = 1000;
private static final long RETRY_SLEEP_TIME_MS = 100;
private static final long MAX_BATCHING_DELAY_MS = 10;
private static final int MAX_BUFFER_SIZE = 3;
private static final int WORK_LOAD_SIZE = 2;
private AcceptorExecutor<Integer, String> acceptorExecutor;
@Before
public void setUp() throws Exception {
acceptorExecutor = new AcceptorExecutor<>(
"TEST", MAX_BUFFER_SIZE, WORK_LOAD_SIZE, MAX_BATCHING_DELAY_MS,
SERVER_UNAVAILABLE_SLEEP_TIME_MS, RETRY_SLEEP_TIME_MS
);
}
@After
public void tearDown() throws Exception {
acceptorExecutor.shutdown();
}
@Test
public void testTasksAreDispatchedToWorkers() throws Exception {
acceptorExecutor.process(1, "Task1", System.currentTimeMillis() + 60 * 1000);
TaskHolder<Integer, String> taskHolder = acceptorExecutor.requestWorkItem().poll(5, TimeUnit.SECONDS);
verifyTaskHolder(taskHolder, 1, "Task1");
acceptorExecutor.process(2, "Task2", System.currentTimeMillis() + 60 * 1000);
List<TaskHolder<Integer, String>> taskHolders = acceptorExecutor.requestWorkItems().poll(5, TimeUnit.SECONDS);
assertThat(taskHolders.size(), is(equalTo(1)));
verifyTaskHolder(taskHolders.get(0), 2, "Task2");
}
@Test
public void testBatchSizeIsConstrainedByConfiguredMaxSize() throws Exception {
for (int i = 0; i <= MAX_BUFFER_SIZE; i++) {
acceptorExecutor.process(i, "Task" + i, System.currentTimeMillis() + 60 * 1000);
}
List<TaskHolder<Integer, String>> taskHolders = acceptorExecutor.requestWorkItems().poll(5, TimeUnit.SECONDS);
assertThat(taskHolders.size(), is(equalTo(WORK_LOAD_SIZE)));
}
@Test
public void testNewTaskOverridesOldOne() throws Exception {
acceptorExecutor.process(1, "Task1", System.currentTimeMillis() + 60 * 1000);
acceptorExecutor.process(1, "Task1.1", System.currentTimeMillis() + 60 * 1000);
TaskHolder<Integer, String> taskHolder = acceptorExecutor.requestWorkItem().poll(5, TimeUnit.SECONDS);
verifyTaskHolder(taskHolder, 1, "Task1.1");
}
@Test
public void testRepublishedTaskIsHandledFirst() throws Exception {
acceptorExecutor.process(1, "Task1", System.currentTimeMillis() + 60 * 1000);
acceptorExecutor.process(2, "Task2", System.currentTimeMillis() + 60 * 1000);
TaskHolder<Integer, String> firstTaskHolder = acceptorExecutor.requestWorkItem().poll(5, TimeUnit.SECONDS);
verifyTaskHolder(firstTaskHolder, 1, "Task1");
acceptorExecutor.reprocess(firstTaskHolder, ProcessingResult.TransientError);
TaskHolder<Integer, String> secondTaskHolder = acceptorExecutor.requestWorkItem().poll(5, TimeUnit.SECONDS);
verifyTaskHolder(secondTaskHolder, 1, "Task1");
TaskHolder<Integer, String> thirdTaskHolder = acceptorExecutor.requestWorkItem().poll(5, TimeUnit.SECONDS);
verifyTaskHolder(thirdTaskHolder, 2, "Task2");
}
@Test
public void testWhenBufferOverflowsOldestTasksAreRemoved() throws Exception {
for (int i = 0; i <= MAX_BUFFER_SIZE; i++) {
acceptorExecutor.process(i, "Task" + i, System.currentTimeMillis() + 60 * 1000);
}
// Task 0 should be dropped out
TaskHolder<Integer, String> firstTaskHolder = acceptorExecutor.requestWorkItem().poll(5, TimeUnit.SECONDS);
verifyTaskHolder(firstTaskHolder, 1, "Task1");
}
@Test
public void testTasksAreDelayToMaximizeBatchSize() throws Exception {
BlockingQueue<List<TaskHolder<Integer, String>>> taskQueue = acceptorExecutor.requestWorkItems();
acceptorExecutor.process(1, "Task1", System.currentTimeMillis() + 60 * 1000);
Thread.sleep(MAX_BATCHING_DELAY_MS / 2);
acceptorExecutor.process(2, "Task2", System.currentTimeMillis() + 60 * 1000);
List<TaskHolder<Integer, String>> taskHolders = taskQueue.poll(5, TimeUnit.SECONDS);
assertThat(taskHolders.size(), is(equalTo(2)));
}
private static void verifyTaskHolder(TaskHolder<Integer, String> taskHolder, int id, String task) {
assertThat(taskHolder, is(notNullValue()));
assertThat(taskHolder.getId(), is(equalTo(id)));
assertThat(taskHolder.getTask(), is(equalTo(task)));
}
}