| /** |
| * 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.mapreduce.lib.reduce; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.conf.Configuration.IntegerRanges; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.RawComparator; |
| import org.apache.hadoop.mapreduce.Counter; |
| import org.apache.hadoop.mapreduce.InputFormat; |
| import org.apache.hadoop.mapreduce.JobID; |
| import org.apache.hadoop.mapreduce.Mapper; |
| import org.apache.hadoop.mapreduce.OutputCommitter; |
| import org.apache.hadoop.mapreduce.OutputFormat; |
| import org.apache.hadoop.mapreduce.Partitioner; |
| import org.apache.hadoop.mapreduce.ReduceContext; |
| import org.apache.hadoop.mapreduce.Reducer; |
| import org.apache.hadoop.mapreduce.TaskAttemptID; |
| import org.apache.hadoop.security.Credentials; |
| |
| /** |
| * A {@link Reducer} which wraps a given one to allow for custom |
| * {@link Reducer.Context} implementations. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public class WrappedReducer<KEYIN, VALUEIN, KEYOUT, VALUEOUT> |
| extends Reducer<KEYIN, VALUEIN, KEYOUT, VALUEOUT> { |
| |
| /** |
| * A a wrapped {@link Reducer.Context} for custom implementations. |
| * @param reduceContext <code>ReduceContext</code> to be wrapped |
| * @return a wrapped <code>Reducer.Context</code> for custom implementations |
| */ |
| public Reducer<KEYIN, VALUEIN, KEYOUT, VALUEOUT>.Context |
| getReducerContext(ReduceContext<KEYIN, VALUEIN, KEYOUT, VALUEOUT> reduceContext) { |
| return new Context(reduceContext); |
| } |
| |
| @InterfaceStability.Evolving |
| public class Context |
| extends Reducer<KEYIN, VALUEIN, KEYOUT, VALUEOUT>.Context { |
| |
| protected ReduceContext<KEYIN, VALUEIN, KEYOUT, VALUEOUT> reduceContext; |
| |
| public Context(ReduceContext<KEYIN, VALUEIN, KEYOUT, VALUEOUT> reduceContext) |
| { |
| this.reduceContext = reduceContext; |
| } |
| |
| @Override |
| public KEYIN getCurrentKey() throws IOException, InterruptedException { |
| return reduceContext.getCurrentKey(); |
| } |
| |
| @Override |
| public VALUEIN getCurrentValue() throws IOException, InterruptedException { |
| return reduceContext.getCurrentValue(); |
| } |
| |
| @Override |
| public boolean nextKeyValue() throws IOException, InterruptedException { |
| return reduceContext.nextKeyValue(); |
| } |
| |
| @Override |
| public Counter getCounter(Enum counterName) { |
| return reduceContext.getCounter(counterName); |
| } |
| |
| @Override |
| public Counter getCounter(String groupName, String counterName) { |
| return reduceContext.getCounter(groupName, counterName); |
| } |
| |
| @Override |
| public OutputCommitter getOutputCommitter() { |
| return reduceContext.getOutputCommitter(); |
| } |
| |
| @Override |
| public void write(KEYOUT key, VALUEOUT value) throws IOException, |
| InterruptedException { |
| reduceContext.write(key, value); |
| } |
| |
| @Override |
| public String getStatus() { |
| return reduceContext.getStatus(); |
| } |
| |
| @Override |
| public TaskAttemptID getTaskAttemptID() { |
| return reduceContext.getTaskAttemptID(); |
| } |
| |
| @Override |
| public void setStatus(String msg) { |
| reduceContext.setStatus(msg); |
| } |
| |
| @Override |
| public Path[] getArchiveClassPaths() { |
| return reduceContext.getArchiveClassPaths(); |
| } |
| |
| @Override |
| public String[] getArchiveTimestamps() { |
| return reduceContext.getArchiveTimestamps(); |
| } |
| |
| @Override |
| public URI[] getCacheArchives() throws IOException { |
| return reduceContext.getCacheArchives(); |
| } |
| |
| @Override |
| public URI[] getCacheFiles() throws IOException { |
| return reduceContext.getCacheArchives(); |
| } |
| |
| @Override |
| public Class<? extends Reducer<?, ?, ?, ?>> getCombinerClass() |
| throws ClassNotFoundException { |
| return reduceContext.getCombinerClass(); |
| } |
| |
| @Override |
| public Configuration getConfiguration() { |
| return reduceContext.getConfiguration(); |
| } |
| |
| @Override |
| public Path[] getFileClassPaths() { |
| return reduceContext.getFileClassPaths(); |
| } |
| |
| @Override |
| public String[] getFileTimestamps() { |
| return reduceContext.getFileTimestamps(); |
| } |
| |
| @Override |
| public RawComparator<?> getGroupingComparator() { |
| return reduceContext.getGroupingComparator(); |
| } |
| |
| @Override |
| public Class<? extends InputFormat<?, ?>> getInputFormatClass() |
| throws ClassNotFoundException { |
| return reduceContext.getInputFormatClass(); |
| } |
| |
| @Override |
| public String getJar() { |
| return reduceContext.getJar(); |
| } |
| |
| @Override |
| public JobID getJobID() { |
| return reduceContext.getJobID(); |
| } |
| |
| @Override |
| public String getJobName() { |
| return reduceContext.getJobName(); |
| } |
| |
| @Override |
| public boolean getJobSetupCleanupNeeded() { |
| return reduceContext.getJobSetupCleanupNeeded(); |
| } |
| |
| @Override |
| public boolean getTaskCleanupNeeded() { |
| return reduceContext.getTaskCleanupNeeded(); |
| } |
| |
| @Override |
| public Path[] getLocalCacheArchives() throws IOException { |
| return reduceContext.getLocalCacheArchives(); |
| } |
| |
| @Override |
| public Path[] getLocalCacheFiles() throws IOException { |
| return reduceContext.getLocalCacheFiles(); |
| } |
| |
| @Override |
| public Class<?> getMapOutputKeyClass() { |
| return reduceContext.getMapOutputKeyClass(); |
| } |
| |
| @Override |
| public Class<?> getMapOutputValueClass() { |
| return reduceContext.getMapOutputValueClass(); |
| } |
| |
| @Override |
| public Class<? extends Mapper<?, ?, ?, ?>> getMapperClass() |
| throws ClassNotFoundException { |
| return reduceContext.getMapperClass(); |
| } |
| |
| @Override |
| public int getMaxMapAttempts() { |
| return reduceContext.getMaxMapAttempts(); |
| } |
| |
| @Override |
| public int getMaxReduceAttempts() { |
| return reduceContext.getMaxReduceAttempts(); |
| } |
| |
| @Override |
| public int getNumReduceTasks() { |
| return reduceContext.getNumReduceTasks(); |
| } |
| |
| @Override |
| public Class<? extends OutputFormat<?, ?>> getOutputFormatClass() |
| throws ClassNotFoundException { |
| return reduceContext.getOutputFormatClass(); |
| } |
| |
| @Override |
| public Class<?> getOutputKeyClass() { |
| return reduceContext.getOutputKeyClass(); |
| } |
| |
| @Override |
| public Class<?> getOutputValueClass() { |
| return reduceContext.getOutputValueClass(); |
| } |
| |
| @Override |
| public Class<? extends Partitioner<?, ?>> getPartitionerClass() |
| throws ClassNotFoundException { |
| return reduceContext.getPartitionerClass(); |
| } |
| |
| @Override |
| public Class<? extends Reducer<?, ?, ?, ?>> getReducerClass() |
| throws ClassNotFoundException { |
| return reduceContext.getReducerClass(); |
| } |
| |
| @Override |
| public RawComparator<?> getSortComparator() { |
| return reduceContext.getSortComparator(); |
| } |
| |
| @Override |
| public boolean getSymlink() { |
| return reduceContext.getSymlink(); |
| } |
| |
| @Override |
| public Path getWorkingDirectory() throws IOException { |
| return reduceContext.getWorkingDirectory(); |
| } |
| |
| @Override |
| public void progress() { |
| reduceContext.progress(); |
| } |
| |
| @Override |
| public Iterable<VALUEIN> getValues() throws IOException, |
| InterruptedException { |
| return reduceContext.getValues(); |
| } |
| |
| @Override |
| public boolean nextKey() throws IOException, InterruptedException { |
| return reduceContext.nextKey(); |
| } |
| |
| @Override |
| public boolean getProfileEnabled() { |
| return reduceContext.getProfileEnabled(); |
| } |
| |
| @Override |
| public String getProfileParams() { |
| return reduceContext.getProfileParams(); |
| } |
| |
| @Override |
| public IntegerRanges getProfileTaskRange(boolean isMap) { |
| return reduceContext.getProfileTaskRange(isMap); |
| } |
| |
| @Override |
| public String getUser() { |
| return reduceContext.getUser(); |
| } |
| |
| @Override |
| public Credentials getCredentials() { |
| return reduceContext.getCredentials(); |
| } |
| |
| @Override |
| public float getProgress() { |
| return reduceContext.getProgress(); |
| } |
| } |
| } |