org.apache.rocketmq.broker.offset.BroadcastOffsetStore Maven / Gradle / Ivy
/*
* 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.rocketmq.broker.offset;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.rocketmq.common.MixAll;
public class BroadcastOffsetStore {
private final ConcurrentMap offsetTable = new ConcurrentHashMap<>();
public void updateOffset(int queueId, long offset, boolean increaseOnly) {
AtomicLong offsetOld = this.offsetTable.get(queueId);
if (null == offsetOld) {
offsetOld = this.offsetTable.putIfAbsent(queueId, new AtomicLong(offset));
}
if (null != offsetOld) {
if (increaseOnly) {
MixAll.compareAndIncreaseOnly(offsetOld, offset);
} else {
offsetOld.set(offset);
}
}
}
public long readOffset(int queueId) {
AtomicLong offset = this.offsetTable.get(queueId);
if (offset != null) {
return offset.get();
}
return -1L;
}
public Set queueList() {
return offsetTable.keySet();
}
}