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

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Here is the source code for org.apache.hama.bsp.TestPartitioning.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.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hama.Constants;
import org.apache.hama.HamaCluster;
import org.apache.hama.HamaConfiguration;
import org.apache.hama.bsp.sync.SyncException;
import org.apache.hama.commons.util.KeyValuePair;

public class TestPartitioning extends HamaCluster {

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

    public static String TMP_OUTPUT = "/tmp/test-example/";
    public static final String TMP_OUTPUT_PATH = "/tmp/test-example/output.txt";
    public static Path OUTPUT_PATH = new Path(TMP_OUTPUT);

    protected HamaConfiguration configuration;

    // these variables are preventing from rebooting the whole stuff again since
    // setup and teardown are called per method.

    public TestPartitioning() {
        configuration = new HamaConfiguration();
        configuration.set("bsp.master.address", "localhost");
        configuration.set("hama.child.redirect.log.console", "true");
        assertEquals("Make sure master addr is set to localhost:", "localhost",
                configuration.get("bsp.master.address"));
        configuration.set("bsp.local.dir", "/tmp/hama-test");
        configuration.set(Constants.ZOOKEEPER_QUORUM, "localhost");
        configuration.setInt(Constants.ZOOKEEPER_CLIENT_PORT, 21810);
        configuration.set("hama.sync.peer.class",
                org.apache.hama.bsp.sync.ZooKeeperSyncClientImpl.class.getCanonicalName());
    }

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

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

    public void testPartitioner() throws Exception {

        Configuration conf = new Configuration();
        conf.set("bsp.local.dir", "/tmp/hama-test/partitioning");
        conf.setBoolean("bsp.input.runtime.partitioning", true);
        BSPJob bsp = new BSPJob(new HamaConfiguration(conf));
        bsp.setJobName("Test partitioning with input");
        bsp.setBspClass(PartionedBSP.class);
        bsp.setNumBspTask(2);
        conf.setInt(Constants.ZOOKEEPER_SESSION_TIMEOUT, 600);
        bsp.setInputFormat(TextInputFormat.class);
        bsp.setOutputFormat(NullOutputFormat.class);
        FileInputFormat.setInputPaths(bsp, "../CHANGES.txt,../README.md");
        bsp.setPartitioner(HashPartitioner.class);
        assertTrue(bsp.waitForCompletion(true));

        FileSystem fs = FileSystem.get(conf);
        fs.delete(OUTPUT_PATH, true);
    }

    public static class PartionedBSP extends BSP<LongWritable, Text, NullWritable, NullWritable, NullWritable> {

        @Override
        public void bsp(BSPPeer<LongWritable, Text, NullWritable, NullWritable, NullWritable> peer)
                throws IOException, SyncException, InterruptedException {
            long numOfPairs = 0;
            KeyValuePair<LongWritable, Text> readNext = null;
            while ((readNext = peer.readNext()) != null) {
                LOG.debug(readNext.getKey().get() + " / " + readNext.getValue().toString());
                numOfPairs++;
            }

            assertTrue(numOfPairs > 2);
        }
    }

}