/**
* 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.hama.bsp.message;
import java.util.Arrays;
import junit.framework.TestCase;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.IntWritable;
import org.apache.hama.bsp.TaskAttemptID;
import org.apache.hama.bsp.TaskID;
import org.apache.hama.bsp.message.queue.DiskQueue;
import org.junit.Test;
public class TestDiskQueue extends TestCase {
public static final String TMP_OUTPUT_PATH = "/tmp/messageQueue";
static Configuration conf = new Configuration();
static {
conf.set(DiskQueue.DISK_QUEUE_PATH_KEY, TMP_OUTPUT_PATH);
}
@Test
public void testDiskQueue() throws Exception {
DiskQueue<IntWritable> queue = getQueue();
checkQueue(queue);
queue.close();
}
@Test
public void testMultipleIterations() throws Exception {
DiskQueue<IntWritable> queue = getQueue();
for (int superstep = 0; superstep < 15; superstep++) {
checkQueue(queue);
}
queue.close();
}
public DiskQueue<IntWritable> getQueue() {
TaskAttemptID id = new TaskAttemptID(new TaskID("123", 1, 2), 0);
DiskQueue<IntWritable> queue = new DiskQueue<IntWritable>();
// normally this is injected via reflection
queue.setConf(conf);
queue.init(conf, id);
return queue;
}
public void checkQueue(DiskQueue<IntWritable> queue) {
queue.prepareWrite();
for (int i = 0; i < 10; i++) {
queue.add(new IntWritable(i));
}
queue.addAll(Arrays.asList(new IntWritable(11), new IntWritable(12),
new IntWritable(13)));
assertEquals(13, queue.size());
queue.prepareRead();
for (int i = 0; i < 9; i++) {
assertEquals(i, queue.poll().get());
}
queue.clear();
assertEquals(0, queue.size());
}
}