/**
* 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.hbase.master.cleaner;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hbase.BaseConfigurable;
/**
* Base class for the hfile cleaning function inside the master. By default, only the
* {@link TimeToLiveHFileCleaner} is called.
* <p>
* If other effects are needed, implement your own LogCleanerDelegate and add it to the
* configuration "hbase.master.hfilecleaner.plugins", which is a comma-separated list of fully
* qualified class names. The <code>HFileCleaner<code> will build the cleaner chain in
* order the order specified by the configuration.
* <p>
* For subclasses, setConf will be called exactly <i>once</i> before using the cleaner.
* <p>
* Since {@link BaseHFileCleanerDelegate HFileCleanerDelegates} are created in
* HFileCleaner by reflection, classes that implements this interface <b>must</b>
* provide a default constructor.
*/
@InterfaceAudience.Private
public abstract class BaseHFileCleanerDelegate extends BaseConfigurable implements
FileCleanerDelegate {
private boolean stopped = false;
@Override
public void stop(String why) {
this.stopped = true;
}
@Override
public boolean isStopped() {
return this.stopped;
}
}