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 import java.util.Map; 24 25 import org.apache.hadoop.fs.FileSystem; 26 import org.apache.hadoop.hbase.HRegionInfo; 27 import org.apache.hadoop.hbase.catalog.CatalogTracker; 28 import org.apache.hadoop.hbase.ipc.RpcServer; 29 import org.apache.hadoop.hbase.regionserver.wal.HLog; 30 import org.apache.zookeeper.KeeperException; 31 32 /** 33 * Services provided by {@link HRegionServer} 34 */ 35 public interface RegionServerServices extends OnlineRegions { 36 /** 37 * @return True if this regionserver is stopping. 38 */ 39 public boolean isStopping(); 40 41 /** @return the HLog */ 42 public HLog getWAL(); 43 44 /** 45 * @return Implementation of {@link CompactionRequestor} or null. 46 */ 47 public CompactionRequestor getCompactionRequester(); 48 49 /** 50 * @return Implementation of {@link FlushRequester} or null. 51 */ 52 public FlushRequester getFlushRequester(); 53 54 /** 55 * @return the RegionServerAccounting for this Region Server 56 */ 57 public RegionServerAccounting getRegionServerAccounting(); 58 59 /** 60 * Tasks to perform after region open to complete deploy of region on 61 * regionserver 62 * 63 * @param r Region to open. 64 * @param ct Instance of {@link CatalogTracker} 65 * @param daughter True if this is daughter of a split 66 * @throws KeeperException 67 * @throws IOException 68 */ 69 public void postOpenDeployTasks(final HRegion r, final CatalogTracker ct, 70 final boolean daughter) 71 throws KeeperException, IOException; 72 73 /** 74 * Returns a reference to the region server's RPC server 75 */ 76 public RpcServer getRpcServer(); 77 78 /** 79 * Remove passed <code>hri</code> from the internal list of regions in transition on this 80 * regionserver. 81 * @param hri Region to remove. 82 * @return True if removed 83 */ 84 public boolean removeFromRegionsInTransition(HRegionInfo hri); 85 /** 86 * @param hri 87 * @return True if the internal list of regions in transition includes the 88 * passed <code>hri</code>. 89 */ 90 public boolean containsKeyInRegionsInTransition(HRegionInfo hri); 91 92 /** 93 * @return Return the FileSystem object used by the regionserver 94 */ 95 public FileSystem getFileSystem(); 96 97 /** 98 * @return The RegionServer's "Leases" service 99 */ 100 public Leases getLeases(); 101 }