| /* |
| * Druid - a distributed column store. |
| * Copyright (C) 2012 Metamarkets Group Inc. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| package com.metamx.druid.indexer; |
| |
| import com.metamx.common.Pair; |
| import org.joda.time.DateTime; |
| |
| import java.nio.ByteBuffer; |
| |
| public class Bucket |
| { |
| public static int PREAMBLE_BYTES = 16; |
| |
| /** ID for this bucket, unique for this indexer run. Used for grouping and partitioning. */ |
| private final int shardNum; |
| |
| /** Start time of this bucket's time window. End time can be determined by our GranularitySpec. */ |
| public final DateTime time; |
| |
| /** Partition number of this bucket within our time window (other Buckets may occupy the same window). */ |
| public final int partitionNum; |
| |
| public Bucket(int shardNum, DateTime time, int partitionNum) |
| { |
| this.shardNum = shardNum; |
| this.time = time; |
| this.partitionNum = partitionNum; |
| } |
| |
| public byte[] toGroupKey(byte[]... parts) |
| { |
| ByteBuffer buf = ByteBuffer.allocate(PREAMBLE_BYTES + sizes(parts)); |
| |
| buf.putInt(shardNum); |
| buf.putLong(time.getMillis()); |
| buf.putInt(partitionNum); |
| for (int i = 0; i < parts.length; i++) { |
| buf.put(parts[i]); |
| } |
| |
| return buf.array(); |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "Bucket{" + |
| "time=" + time + |
| ", partitionNum=" + partitionNum + |
| ", shardNum=" + shardNum + |
| '}'; |
| } |
| |
| @Override |
| public boolean equals(Object o) |
| { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| |
| Bucket bucket = (Bucket) o; |
| |
| if (partitionNum != bucket.partitionNum) { |
| return false; |
| } |
| if (shardNum != bucket.shardNum) { |
| return false; |
| } |
| if (time != null ? !time.equals(bucket.time) : bucket.time != null) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public int hashCode() |
| { |
| int result = time != null ? time.hashCode() : 0; |
| result = 31 * result + partitionNum; |
| result = 31 * result + shardNum; |
| return result; |
| } |
| |
| private static int sizes(byte[]... parts) |
| { |
| int size = 0; |
| for (int i = 0; i < parts.length; i++) { |
| size += parts[i].length; |
| } |
| return size; |
| } |
| |
| public static final Pair<Bucket, byte[]> fromGroupKey(byte[] keyBytes) |
| { |
| ByteBuffer buf = ByteBuffer.wrap(keyBytes); |
| |
| Bucket bucket = new Bucket(buf.getInt(), new DateTime(buf.getLong()), buf.getInt()); |
| byte[] bytesLeft = new byte[buf.remaining()]; |
| buf.get(bytesLeft); |
| |
| return Pair.of(bucket, bytesLeft); |
| } |
| } |