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 package org.apache.hadoop.hbase.regionserver; 20 21 import org.apache.hadoop.classification.InterfaceAudience; 22 import org.apache.hadoop.classification.InterfaceStability; 23 24 /** 25 * A more restricted interface for HStore. Only gives the caller access to information 26 * about store configuration/settings that cannot easily be obtained from XML config object. 27 * Example user would be CompactionPolicy that doesn't need entire (H)Store, only this. 28 * Add things here as needed. 29 */ 30 @InterfaceAudience.Private 31 @InterfaceStability.Unstable 32 public interface StoreConfigInformation { 33 /** 34 * TODO: remove after HBASE-7252 is fixed. 35 * @return Gets the Memstore flush size for the region that this store works with. 36 */ 37 // TODO: Why is this in here? It should be in Store and it should return the Store flush size, 38 // not the Regions. St.Ack 39 long getMemstoreFlushSize(); 40 41 /** 42 * @return Gets the cf-specific time-to-live for store files. 43 */ 44 long getStoreFileTtl(); 45 46 /** 47 * @return Gets the cf-specific compaction check frequency multiplier. 48 * The need for compaction (outside of normal checks during flush, open, etc.) will 49 * be ascertained every multiplier * HConstants.THREAD_WAKE_FREQUENCY milliseconds. 50 */ 51 long getCompactionCheckMultiplier(); 52 53 /** 54 * The number of files required before flushes for this store will be blocked. 55 */ 56 long getBlockingFileCount(); 57 }