hadoop DeleteCompletionCallback 源码
haddop DeleteCompletionCallback 代码
文件路径：/hadoop-common-project/hadoop-registry/src/main/java/org/apache/hadoop/registry/server/services/DeleteCompletionCallback.java
/*
* 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.hadoop.registry.server.services;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.api.BackgroundCallback;
import org.apache.curator.framework.api.CuratorEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Curator callback for delete operations completing.
* <p>
* This callback logs at debug and increments the event counter.
*/
public class DeleteCompletionCallback implements BackgroundCallback {
private static final Logger LOG =
LoggerFactory.getLogger(DeleteCompletionCallback.class);
private AtomicInteger events = new AtomicInteger(0);
@Override
public void processResult(CuratorFramework client,
CuratorEvent event) throws
Exception {
if (LOG.isDebugEnabled()) {
LOG.debug("Delete event {}", event);
}
events.incrementAndGet();
}
/**
* Get the number of deletion events
* @return the count of events
*/
public int getEventCount() {
return events.get();
}
}
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