| /* |
| * 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.nutch.indexer; |
| |
| import java.io.IOException; |
| import java.lang.invoke.MethodHandles; |
| |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; |
| import org.apache.hadoop.mapreduce.RecordWriter; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class IndexerOutputFormat |
| extends FileOutputFormat<Text, NutchIndexAction> { |
| |
| private static final Logger LOG = LoggerFactory |
| .getLogger(MethodHandles.lookup().lookupClass()); |
| |
| @Override |
| public RecordWriter<Text, NutchIndexAction> getRecordWriter( |
| TaskAttemptContext context) throws IOException { |
| |
| Configuration conf = context.getConfiguration(); |
| final IndexWriters writers = IndexWriters.get(conf); |
| |
| String name = getUniqueFile(context, "part", ""); |
| writers.open(conf, name); |
| LOG.info(writers.describe()); |
| |
| return new RecordWriter<Text, NutchIndexAction>() { |
| |
| public void close(TaskAttemptContext context) throws IOException { |
| // do the commits once and for all the reducers in one go |
| boolean noCommit = conf |
| .getBoolean(IndexerMapReduce.INDEXER_NO_COMMIT, false); |
| if (!noCommit) { |
| writers.commit(); |
| } |
| writers.close(); |
| } |
| |
| public void write(Text key, NutchIndexAction indexAction) |
| throws IOException { |
| if (indexAction.action == NutchIndexAction.ADD) { |
| writers.write(indexAction.doc); |
| } else if (indexAction.action == NutchIndexAction.DELETE) { |
| writers.delete(key.toString()); |
| } |
| } |
| }; |
| } |
| } |