/** | |
* 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 com.alibaba.jstorm.common.metric.operator.merger; | |
import java.util.Collection; | |
import java.util.concurrent.atomic.AtomicLong; | |
public class LongSumMerger implements Merger<AtomicLong> { | |
private static final long serialVersionUID = -3500779273677666691L; | |
@Override | |
public AtomicLong merge(Collection<AtomicLong> objs, AtomicLong unflushed, | |
Object... others) { | |
AtomicLong ret = new AtomicLong(0); | |
if (unflushed != null) { | |
ret.addAndGet(unflushed.get()); | |
} | |
for (AtomicLong item : objs) { | |
if (item == null) { | |
continue; | |
} | |
ret.addAndGet(item.get()); | |
} | |
return ret; | |
} | |
} |