| /* |
| * 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.chukwa; |
| |
| |
| import java.util.*; |
| import org.apache.hadoop.io.DataOutputBuffer; |
| import java.io.*; |
| |
| /** |
| * Right now, just handles record collection. |
| * |
| */ |
| public class ChunkBuilder { |
| |
| ArrayList<Integer> recOffsets = new ArrayList<Integer>(); |
| int lastRecOffset = -1; |
| DataOutputBuffer buf = new DataOutputBuffer(); |
| |
| /** |
| * Adds the data in rec to an internal buffer; rec can be reused immediately. |
| * |
| * @param rec is byte array of data |
| */ |
| public void addRecord(byte[] rec) { |
| lastRecOffset = lastRecOffset + rec.length; |
| recOffsets.add(lastRecOffset); |
| try { |
| buf.write(rec); |
| } catch (IOException e) { |
| throw new RuntimeException("buffer write failed. Out of memory?", e); |
| } |
| } |
| |
| public Chunk getChunk() { |
| ChunkImpl c = new ChunkImpl(); |
| c.setData(buf.getData()); |
| c.setSeqID(buf.getLength()); |
| int[] offsets = new int[recOffsets.size()]; |
| for (int i = 0; i < offsets.length; ++i) |
| offsets[i] = recOffsets.get(i); |
| c.setRecordOffsets(offsets); |
| |
| return c; |
| } |
| |
| } |