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.io.hfile.slab; 21 22 import org.apache.hadoop.hbase.classification.InterfaceAudience; 23 import org.apache.hadoop.hbase.io.hfile.BlockCacheKey; 24 25 /** 26 * Interface for objects that want to know when actions occur in a SingleSizeCache. 27 * 28 * @deprecated As of 1.0, replaced by {@link org.apache.hadoop.hbase.io.hfile.bucket.BucketCache}. 29 */ 30 @InterfaceAudience.Private 31 @Deprecated 32 interface SlabItemActionWatcher { 33 34 /** 35 * This is called as a callback when an item is removed from a SingleSizeCache. 36 * 37 * @param key the key of the item being evicted 38 * @param notifier the object notifying the SlabCache of the eviction. 39 */ 40 void onEviction(BlockCacheKey key, SingleSizeCache notifier); 41 42 /** 43 * This is called as a callback when an item is inserted into a SingleSizeCache. 44 * 45 * @param key the key of the item being added 46 * @param notifier the object notifying the SlabCache of the insertion.. 47 */ 48 void onInsertion(BlockCacheKey key, SingleSizeCache notifier); 49 }