| /* |
| * 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.iotdb.commons.consensus.index.impl; |
| |
| import org.apache.iotdb.commons.consensus.index.ProgressIndex; |
| import org.apache.iotdb.commons.consensus.index.ProgressIndexType; |
| import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils; |
| |
| import javax.annotation.Nonnull; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.nio.ByteBuffer; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| |
| public class MetaProgressIndex extends ProgressIndex { |
| |
| private final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(); |
| |
| private long index; |
| |
| public MetaProgressIndex(long index) { |
| this.index = index; |
| } |
| |
| private MetaProgressIndex() { |
| // Empty constructor |
| } |
| |
| public long getIndex() { |
| return index; |
| } |
| |
| @Override |
| public void serialize(ByteBuffer byteBuffer) { |
| lock.readLock().lock(); |
| try { |
| ProgressIndexType.META_PROGRESS_INDEX.serialize(byteBuffer); |
| |
| ReadWriteIOUtils.write(index, byteBuffer); |
| } finally { |
| lock.readLock().unlock(); |
| } |
| } |
| |
| @Override |
| public void serialize(OutputStream stream) throws IOException { |
| lock.readLock().lock(); |
| try { |
| ProgressIndexType.META_PROGRESS_INDEX.serialize(stream); |
| |
| ReadWriteIOUtils.write(index, stream); |
| } finally { |
| lock.readLock().unlock(); |
| } |
| } |
| |
| @Override |
| public boolean isAfter(@Nonnull ProgressIndex progressIndex) { |
| lock.readLock().lock(); |
| try { |
| if (progressIndex instanceof MinimumProgressIndex) { |
| return true; |
| } |
| |
| if (progressIndex instanceof HybridProgressIndex) { |
| return ((HybridProgressIndex) progressIndex).isGivenProgressIndexAfterSelf(this); |
| } |
| |
| if (!(progressIndex instanceof MetaProgressIndex)) { |
| return false; |
| } |
| |
| final MetaProgressIndex thisMetaProgressIndex = this; |
| final MetaProgressIndex thatMetaProgressIndex = (MetaProgressIndex) progressIndex; |
| return thatMetaProgressIndex.index < thisMetaProgressIndex.index; |
| } finally { |
| lock.readLock().unlock(); |
| } |
| } |
| |
| @Override |
| public boolean equals(ProgressIndex progressIndex) { |
| lock.readLock().lock(); |
| try { |
| if (!(progressIndex instanceof MetaProgressIndex)) { |
| return false; |
| } |
| |
| final MetaProgressIndex thisMetaProgressIndex = this; |
| final MetaProgressIndex thatMetaProgressIndex = (MetaProgressIndex) progressIndex; |
| return thisMetaProgressIndex.index == thatMetaProgressIndex.index; |
| } finally { |
| lock.readLock().unlock(); |
| } |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == null) { |
| return false; |
| } |
| if (this == obj) { |
| return true; |
| } |
| if (!(obj instanceof MetaProgressIndex)) { |
| return false; |
| } |
| return this.equals((MetaProgressIndex) obj); |
| } |
| |
| @Override |
| public int hashCode() { |
| return 0; |
| } |
| |
| @Override |
| public ProgressIndex updateToMinimumEqualOrIsAfterProgressIndex(ProgressIndex progressIndex) { |
| lock.writeLock().lock(); |
| try { |
| if (!(progressIndex instanceof MetaProgressIndex)) { |
| return this; |
| } |
| |
| this.index = Math.max(this.index, ((MetaProgressIndex) progressIndex).index); |
| return this; |
| } finally { |
| lock.writeLock().unlock(); |
| } |
| } |
| |
| public ProgressIndexType getType() { |
| return ProgressIndexType.META_PROGRESS_INDEX; |
| } |
| |
| @Override |
| public TotalOrderSumTuple getTotalOrderSumTuple() { |
| lock.readLock().lock(); |
| try { |
| return new TotalOrderSumTuple(index); |
| } finally { |
| lock.readLock().unlock(); |
| } |
| } |
| |
| public static MetaProgressIndex deserializeFrom(ByteBuffer byteBuffer) { |
| final MetaProgressIndex metaProgressIndex = new MetaProgressIndex(); |
| metaProgressIndex.index = ReadWriteIOUtils.readLong(byteBuffer); |
| return metaProgressIndex; |
| } |
| |
| public static MetaProgressIndex deserializeFrom(InputStream stream) throws IOException { |
| final MetaProgressIndex metaProgressIndex = new MetaProgressIndex(); |
| metaProgressIndex.index = ReadWriteIOUtils.readLong(stream); |
| return metaProgressIndex; |
| } |
| |
| @Override |
| public String toString() { |
| return "MetaProgressIndex{" + "index=" + index + '}'; |
| } |
| } |