/**
*
* 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 org.apache.hadoop.hbase.classification.InterfaceAudience;
/**
* Request a flush.
*/
@InterfaceAudience.Private
public interface FlushRequester {
/**
* Tell the listener the cache needs to be flushed.
*
* @param region the HRegion requesting the cache flush
*/
void requestFlush(HRegion region);
/**
* Tell the listener the cache needs to be flushed after a delay
*
* @param region the HRegion requesting the cache flush
* @param delay after how much time should the flush happen
*/
void requestDelayedFlush(HRegion region, long delay);
/**
* Register a FlushRequestListener
*
* @param listener
*/
void registerFlushRequestListener(final FlushRequestListener listener);
/**
* Unregister the given FlushRequestListener
*
* @param listener
* @return true when passed listener is unregistered successfully.
*/
public boolean unregisterFlushRequestListener(final FlushRequestListener listener);
/**
* Sets the global memstore limit to a new size.
*
* @param globalMemStoreSize
*/
public void setGlobalMemstoreLimit(long globalMemStoreSize);
}