1 /** 2 * Copyright 2010 The Apache Software Foundation 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 package org.apache.hadoop.hbase.regionserver; 21 22 import java.io.IOException; 23 24 import org.apache.hadoop.fs.FileSystem; 25 import org.apache.hadoop.hbase.HRegionInfo; 26 import org.apache.hadoop.hbase.catalog.CatalogTracker; 27 import org.apache.hadoop.hbase.ipc.RpcServer; 28 import org.apache.hadoop.hbase.regionserver.wal.HLog; 29 import org.apache.zookeeper.KeeperException; 30 31 /** 32 * Services provided by {@link HRegionServer} 33 */ 34 public interface RegionServerServices extends OnlineRegions { 35 /** 36 * @return True if this regionserver is stopping. 37 */ 38 public boolean isStopping(); 39 40 /** @return the HLog for a particular region. Pass null for getting the 41 * default (common) WAL */ 42 public HLog getWAL(HRegionInfo regionInfo) throws IOException; 43 44 /** @return get the default (common) WAL for the server*/ 45 public HLog getWAL() throws IOException; 46 47 /** 48 * @return Implementation of {@link CompactionRequestor} or null. 49 */ 50 public CompactionRequestor getCompactionRequester(); 51 52 /** 53 * @return Implementation of {@link FlushRequester} or null. 54 */ 55 public FlushRequester getFlushRequester(); 56 57 /** 58 * @return the RegionServerAccounting for this Region Server 59 */ 60 public RegionServerAccounting getRegionServerAccounting(); 61 62 /** 63 * Tasks to perform after region open to complete deploy of region on 64 * regionserver 65 * 66 * @param r Region to open. 67 * @param ct Instance of {@link CatalogTracker} 68 * @param daughter True if this is daughter of a split 69 * @throws KeeperException 70 * @throws IOException 71 */ 72 public void postOpenDeployTasks(final HRegion r, final CatalogTracker ct, 73 final boolean daughter) 74 throws KeeperException, IOException; 75 76 /** 77 * Returns a reference to the region server's RPC server 78 */ 79 public RpcServer getRpcServer(); 80 81 /** 82 * Remove passed <code>hri</code> from the internal list of regions in transition on this 83 * regionserver. 84 * @param hri Region to remove. 85 * @return True if removed 86 */ 87 public boolean removeFromRegionsInTransition(HRegionInfo hri); 88 /** 89 * @param hri 90 * @return True if the internal list of regions in transition includes the 91 * passed <code>hri</code>. 92 */ 93 public boolean containsKeyInRegionsInTransition(HRegionInfo hri); 94 95 /** 96 * @return Return the FileSystem object used by the regionserver 97 */ 98 public FileSystem getFileSystem(); 99 100 /** 101 * @return The RegionServer's "Leases" service 102 */ 103 public Leases getLeases(); 104 }