| /** |
| * 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.hadoop.mapred.nativetask.kvtest; |
| |
| import java.io.IOException; |
| import java.util.zip.CRC32; |
| |
| import com.google.common.base.Stopwatch; |
| import com.google.common.primitives.Longs; |
| |
| 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.mapred.nativetask.testutil.BytesFactory; |
| import org.apache.hadoop.mapred.nativetask.testutil.TestConstants; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.Mapper; |
| import org.apache.hadoop.mapreduce.Reducer; |
| import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; |
| import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat; |
| import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; |
| |
| public class KVJob { |
| public static final String INPUTPATH = "nativetask.kvtest.inputfile.path"; |
| public static final String OUTPUTPATH = "nativetask.kvtest.outputfile.path"; |
| private static final Log LOG = LogFactory.getLog(KVJob.class); |
| Job job = null; |
| |
| public static class ValueMapper<KTYPE, VTYPE> extends Mapper<KTYPE, VTYPE, KTYPE, VTYPE> { |
| @Override |
| public void map(KTYPE key, VTYPE value, Context context) |
| throws IOException, InterruptedException { |
| context.write(key, value); |
| } |
| } |
| |
| public static class KVMReducer<KTYPE, VTYPE> extends Reducer<KTYPE, VTYPE, KTYPE, VTYPE> { |
| public void reduce(KTYPE key, VTYPE value, Context context) |
| throws IOException, InterruptedException { |
| context.write(key, value); |
| } |
| } |
| |
| public static class KVReducer<KTYPE, VTYPE> extends Reducer<KTYPE, VTYPE, KTYPE, VTYPE> { |
| |
| @Override |
| @SuppressWarnings({"unchecked"}) |
| public void reduce(KTYPE key, Iterable<VTYPE> values, Context context) |
| throws IOException, InterruptedException { |
| long resultlong = 0;// 8 bytes match BytesFactory.fromBytes function |
| final CRC32 crc32 = new CRC32(); |
| for (final VTYPE val : values) { |
| crc32.reset(); |
| crc32.update(BytesFactory.toBytes(val)); |
| resultlong += crc32.getValue(); |
| } |
| final VTYPE V = null; |
| context.write(key, (VTYPE) BytesFactory.newObject(Longs.toByteArray(resultlong), |
| V.getClass().getName())); |
| } |
| } |
| |
| public KVJob(String jobname, Configuration conf, |
| Class<?> keyclass, Class<?> valueclass, |
| String inputpath, String outputpath) throws Exception { |
| job = Job.getInstance(conf, jobname); |
| job.setJarByClass(KVJob.class); |
| job.setMapperClass(KVJob.ValueMapper.class); |
| job.setOutputKeyClass(keyclass); |
| job.setMapOutputValueClass(valueclass); |
| |
| if (conf.get(TestConstants.NATIVETASK_KVTEST_CREATEFILE).equals("true")) { |
| final FileSystem fs = FileSystem.get(conf); |
| fs.delete(new Path(inputpath), true); |
| fs.close(); |
| final TestInputFile testfile = new TestInputFile(Integer.valueOf(conf.get( |
| TestConstants.FILESIZE_KEY, "1000")), |
| keyclass.getName(), valueclass.getName(), conf); |
| Stopwatch sw = new Stopwatch().start(); |
| testfile.createSequenceTestFile(inputpath); |
| LOG.info("Created test file " + inputpath + " in " + sw.elapsedMillis() + "ms"); |
| } |
| job.setInputFormatClass(SequenceFileInputFormat.class); |
| FileInputFormat.addInputPath(job, new Path(inputpath)); |
| FileOutputFormat.setOutputPath(job, new Path(outputpath)); |
| } |
| |
| public boolean runJob() throws Exception { |
| return job.waitForCompletion(true); |
| } |
| } |