| /** |
| * 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.accumulo.bsp; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map.Entry; |
| |
| import org.apache.accumulo.core.data.Key; |
| import org.apache.accumulo.core.data.Value; |
| import org.apache.hama.bsp.BSPJob; |
| import org.apache.hama.bsp.InputFormat; |
| import org.apache.hama.bsp.InputSplit; |
| import org.apache.hama.bsp.RecordReader; |
| |
| /** |
| * <p> |
| * AccumuloInputFormat class. To be used with Hama BSP. |
| * </p> |
| * |
| * @see BSPJob#setInputFormat(Class) |
| */ |
| public class AccumuloInputFormat extends org.apache.accumulo.core.client.mapreduce.AccumuloInputFormat implements InputFormat<Key,Value> { |
| |
| public class BSPRecordReaderBase extends RecordReaderBase<Key,Value> implements RecordReader<Key,Value> { |
| public BSPRecordReaderBase(InputSplit split, BSPJob job) throws IOException { |
| this.initialize((BSPRangeInputSplit) split, MapreduceWrapper.wrappedTaskAttemptContext(job)); |
| } |
| |
| @Override |
| public boolean nextKeyValue() throws IOException, InterruptedException { |
| return next(currentKey, currentValue); |
| } |
| |
| @Override |
| public Key createKey() { |
| if (currentKey == null) { |
| return new Key(); |
| } else { |
| return currentKey; |
| } |
| } |
| |
| @Override |
| public Value createValue() { |
| if (currentValue == null) { |
| return new Value(new byte[0]); |
| } else { |
| return currentValue; |
| } |
| } |
| |
| @Override |
| public long getPos() throws IOException { |
| return 0; |
| } |
| |
| @Override |
| public boolean next(Key k, Value v) throws IOException { |
| if (scannerIterator.hasNext()) { |
| ++numKeysRead; |
| Entry<Key,Value> entry = scannerIterator.next(); |
| currentKey = entry.getKey(); |
| currentValue = entry.getValue(); |
| k.set(currentKey); |
| v.set(currentValue.get()); |
| return true; |
| } |
| return false; |
| } |
| } |
| |
| public static class BSPRangeInputSplit extends RangeInputSplit implements InputSplit { |
| public BSPRangeInputSplit() { |
| super(); |
| } |
| |
| public BSPRangeInputSplit(RangeInputSplit split) throws IOException { |
| super(split); |
| } |
| } |
| |
| @Override |
| public RecordReader<Key,Value> getRecordReader(InputSplit split, BSPJob job) throws IOException { |
| return new BSPRecordReaderBase(split, job); |
| } |
| |
| @Override |
| public InputSplit[] getSplits(BSPJob job, int arg1) throws IOException { |
| List<org.apache.hadoop.mapreduce.InputSplit> splits = getSplits(MapreduceWrapper.wrappedTaskAttemptContext(job)); |
| InputSplit[] bspSplits = new BSPRangeInputSplit[splits.size()]; |
| for (int i = 0; i < splits.size(); i++) { |
| bspSplits[i] = new BSPRangeInputSplit((RangeInputSplit) splits.get(i)); |
| } |
| return bspSplits; |
| } |
| } |