1 /** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 */ 19 20 package org.apache.hadoop.hbase.regionserver; 21 22 import org.apache.hadoop.classification.InterfaceAudience; 23 24 /** 25 * Request a flush. 26 */ 27 @InterfaceAudience.Private 28 public interface FlushRequester { 29 /** 30 * Tell the listener the cache needs to be flushed. 31 * 32 * @param region the HRegion requesting the cache flush 33 */ 34 void requestFlush(HRegion region); 35 /** 36 * Tell the listener the cache needs to be flushed after a delay 37 * 38 * @param region the HRegion requesting the cache flush 39 * @param delay after how much time should the flush happen 40 */ 41 void requestDelayedFlush(HRegion region, long delay); 42 }