| /* |
| * 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.phoenix.mapreduce; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.hadoop.mapreduce.RecordReader; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| import org.apache.hadoop.mapreduce.lib.input.FileSplit; |
| import org.apache.hadoop.mapreduce.lib.input.LineRecordReader; |
| import org.apache.hadoop.mapreduce.lib.input.TextInputFormat; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Wrapper around TextInputFormat which can ignore the first line in the first InputSplit |
| * for a file. |
| */ |
| public class PhoenixTextInputFormat extends TextInputFormat { |
| public static final String SKIP_HEADER_KEY = "phoenix.input.format.skip.header"; |
| |
| public static void setSkipHeader(Configuration conf) { |
| conf.setBoolean(SKIP_HEADER_KEY, true); |
| } |
| |
| @Override |
| public RecordReader<LongWritable, Text> createRecordReader(InputSplit split, TaskAttemptContext context) { |
| RecordReader<LongWritable,Text> rr = super.createRecordReader(split, context); |
| |
| return new PhoenixLineRecordReader((LineRecordReader) rr); |
| } |
| |
| public static class PhoenixLineRecordReader extends RecordReader<LongWritable,Text> { |
| private static final Logger LOGGER = LoggerFactory.getLogger(PhoenixLineRecordReader.class); |
| private final LineRecordReader rr; |
| private PhoenixLineRecordReader(LineRecordReader rr) { |
| this.rr = rr; |
| } |
| |
| @Override |
| public void initialize(InputSplit genericSplit, TaskAttemptContext context) throws IOException, InterruptedException { |
| rr.initialize(genericSplit, context); |
| final Configuration conf = context.getConfiguration(); |
| final FileSplit split = (FileSplit) genericSplit; |
| if (conf.getBoolean(SKIP_HEADER_KEY, false) && split.getStart() == 0) { |
| LOGGER.trace("Consuming first key-value from {}", genericSplit); |
| nextKeyValue(); |
| } else { |
| LOGGER.trace("Not configured to skip header or not the first input split: {}", split); |
| } |
| } |
| |
| @Override |
| public boolean nextKeyValue() throws IOException, InterruptedException { |
| return rr.nextKeyValue(); |
| } |
| |
| @Override |
| public LongWritable getCurrentKey() throws IOException { |
| return rr.getCurrentKey(); |
| } |
| |
| @Override |
| public Text getCurrentValue() throws IOException { |
| return rr.getCurrentValue(); |
| } |
| |
| @Override |
| public float getProgress() throws IOException { |
| return rr.getProgress(); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| rr.close(); |
| } |
| } |
| } |