/**
* 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.regionserver;
import java.util.Collection;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
/**
* A flush policy determines the stores that need to be flushed when flushing a region.
*/
@InterfaceAudience.Private
public abstract class FlushPolicy extends Configured {
/**
* The region configured for this flush policy.
*/
protected HRegion region;
/**
* Upon construction, this method will be called with the region to be governed. It will be called
* once and only once.
*/
protected void configureForRegion(HRegion region) {
this.region = region;
}
/**
* @return the stores need to be flushed.
*/
public abstract Collection<Store> selectStoresToFlush();
}