| /* |
| * 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.iterate; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.util.Comparator; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.Queue; |
| |
| import org.apache.hadoop.hbase.KeyValue; |
| import org.apache.hadoop.hbase.client.Result; |
| import org.apache.hadoop.hbase.io.ImmutableBytesWritable; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.phoenix.schema.tuple.ResultTuple; |
| import org.apache.phoenix.schema.tuple.Tuple; |
| import org.apache.phoenix.util.PhoenixKeyValueUtil; |
| import org.apache.phoenix.util.ResultUtil; |
| |
| import com.google.common.collect.Lists; |
| |
| public class BufferedTupleQueue extends BufferedQueue<Tuple> { |
| |
| public BufferedTupleQueue(long thresholdBytes) { |
| super(thresholdBytes); |
| } |
| |
| @Override |
| protected BufferedSegmentQueue<Tuple> createSegmentQueue(int index, long thresholdBytes) { |
| return new BufferedTupleSegmentQueue(index, thresholdBytes, false); |
| } |
| |
| @Override |
| protected Comparator<BufferedSegmentQueue<Tuple>> getSegmentQueueComparator() { |
| return new Comparator<BufferedSegmentQueue<Tuple>>() { |
| @Override |
| public int compare(BufferedSegmentQueue<Tuple> q1, BufferedSegmentQueue<Tuple> q2) { |
| return q1.index() - q2.index(); |
| } |
| }; |
| } |
| |
| @Override |
| public Iterator<Tuple> iterator() { |
| return new Iterator<Tuple>() { |
| private Iterator<BufferedSegmentQueue<Tuple>> queueIter; |
| private Iterator<Tuple> currentIter; |
| { |
| this.queueIter = getSegmentQueues().iterator(); |
| this.currentIter = queueIter.hasNext() ? queueIter.next().iterator() : null; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return currentIter != null && currentIter.hasNext(); |
| } |
| |
| @Override |
| public Tuple next() { |
| if (!hasNext()) return null; |
| |
| Tuple ret = currentIter.next(); |
| if (!currentIter.hasNext()) { |
| this.currentIter = queueIter.hasNext() ? queueIter.next().iterator() : null; |
| } |
| |
| return ret; |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| }; |
| } |
| |
| private static class BufferedTupleSegmentQueue extends BufferedSegmentQueue<Tuple> { |
| private LinkedList<Tuple> results; |
| |
| public BufferedTupleSegmentQueue(int index, long thresholdBytes, boolean hasMaxQueueSize) { |
| super(index, thresholdBytes, hasMaxQueueSize); |
| this.results = Lists.newLinkedList(); |
| } |
| |
| @Override |
| protected Queue<Tuple> getInMemoryQueue() { |
| return results; |
| } |
| |
| @Override |
| protected long sizeOf(Tuple e) { |
| KeyValue kv = PhoenixKeyValueUtil.maybeCopyCell(e.getValue(0)); |
| return Bytes.SIZEOF_INT * 2 + kv.getLength(); |
| } |
| |
| @Override |
| protected void writeToStream(DataOutputStream out, Tuple e) throws IOException { |
| KeyValue kv = PhoenixKeyValueUtil.maybeCopyCell(e.getValue(0)); |
| out.writeInt(kv.getLength() + Bytes.SIZEOF_INT); |
| out.writeInt(kv.getLength()); |
| out.write(kv.getBuffer(), kv.getOffset(), kv.getLength()); |
| } |
| |
| @Override |
| protected Tuple readFromStream(DataInputStream in) throws IOException { |
| int length = in.readInt(); |
| if (length < 0) return null; |
| |
| byte[] b = new byte[length]; |
| in.readFully(b); |
| Result result = ResultUtil.toResult(new ImmutableBytesWritable(b)); |
| return new ResultTuple(result); |
| } |
| |
| } |
| } |