| /** |
| * |
| * 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.List; |
| |
| import org.apache.yetus.audience.InterfaceAudience; |
| |
| /** |
| * Request a flush. |
| */ |
| @InterfaceAudience.Private |
| public interface FlushRequester { |
| /** |
| * Tell the listener the cache needs to be flushed. |
| * |
| * @param region the Region requesting the cache flush |
| * @return true if our region is added into the queue, false otherwise |
| */ |
| boolean requestFlush(HRegion region, FlushLifeCycleTracker tracker); |
| |
| /** |
| * Tell the listener the cache needs to be flushed. |
| * |
| * @param region the Region requesting the cache flush |
| * @param families stores of region to flush, if null then use flush policy |
| * @return true if our region is added into the queue, false otherwise |
| */ |
| boolean requestFlush(HRegion region, List<byte[]> families, |
| FlushLifeCycleTracker tracker); |
| |
| /** |
| * Tell the listener the cache needs to be flushed after a delay |
| * |
| * @param region the Region requesting the cache flush |
| * @param delay after how much time should the flush happen |
| * @return true if our region is added into the queue, false otherwise |
| */ |
| boolean 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); |
| } |