org.apache.hama.bsp.TestTaskAllocation.java Source code

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Here is the source code for org.apache.hama.bsp.TestTaskAllocation.java

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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.hama.bsp;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import junit.framework.TestCase;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hama.bsp.BSPJobClient.RawSplit;
import org.apache.hama.bsp.taskallocation.BSPResource;
import org.apache.hama.bsp.taskallocation.BestEffortDataLocalTaskAllocator;
import org.apache.hama.bsp.taskallocation.TaskAllocationStrategy;

public class TestTaskAllocation extends TestCase {

    public static final Log LOG = LogFactory.getLog(TestTaskAllocation.class);

    @Override
    protected void setUp() throws Exception {
        super.setUp();
    }

    @Override
    protected void tearDown() throws Exception {
        super.tearDown();
    }

    public void testBestEffortDataLocality() throws Exception {

        Configuration conf = new Configuration();

        String[] locations = new String[] { "host6", "host4", "host3" };
        String value = "data";
        RawSplit split = new RawSplit();
        split.setLocations(locations);
        split.setBytes(value.getBytes(), 0, value.getBytes().length);
        split.setDataLength(value.getBytes().length);

        assertEquals(value.getBytes().length, (int) split.getDataLength());

        Map<GroomServerStatus, Integer> taskCountInGroomMap = new HashMap<GroomServerStatus, Integer>(20);
        BSPResource[] resources = new BSPResource[0];
        BSPJob job = new BSPJob(new BSPJobID("checkpttest", 1), "/tmp");
        JobInProgress jobProgress = new JobInProgress(job.getJobID(), conf);
        TaskInProgress taskInProgress = new TaskInProgress(job.getJobID(), "job.xml", split, conf, jobProgress, 1);

        Map<String, GroomServerStatus> groomStatuses = new HashMap<String, GroomServerStatus>(20);

        for (int i = 0; i < 10; ++i) {

            String name = "host" + i;
            GroomServerStatus status = new GroomServerStatus(name, new ArrayList<TaskStatus>(), 0, 3);
            groomStatuses.put(name, status);
            taskCountInGroomMap.put(status, 0);

        }

        TaskAllocationStrategy strategy = ReflectionUtils.newInstance(
                conf.getClass("", BestEffortDataLocalTaskAllocator.class, TaskAllocationStrategy.class), conf);

        String[] hosts = strategy.selectGrooms(groomStatuses, taskCountInGroomMap, resources, taskInProgress);

        List<String> list = new ArrayList<String>();

        for (int i = 0; i < hosts.length; ++i) {
            list.add(hosts[i]);
        }

        assertTrue(list.contains("host6"));
        assertTrue(list.contains("host3"));
        assertTrue(list.contains("host4"));

    }

}