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.hbase.HServerInfo; 25 import org.apache.hadoop.hbase.catalog.CatalogTracker; 26 import org.apache.hadoop.hbase.ipc.HBaseRpcMetrics; 27 import org.apache.hadoop.hbase.regionserver.wal.HLog; 28 import org.apache.zookeeper.KeeperException; 29 import java.util.Set; 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 */ 41 public HLog getWAL(); 42 43 /** 44 * @return Implementation of {@link CompactionRequestor} or null. 45 */ 46 public CompactionRequestor getCompactionRequester(); 47 48 /** 49 * @return Implementation of {@link FlushRequester} or null. 50 */ 51 public FlushRequester getFlushRequester(); 52 53 /** 54 * Return data structure that has Server address and startcode. 55 * @return The HServerInfo for this RegionServer. 56 */ 57 public HServerInfo getServerInfo(); 58 59 /** 60 * Tasks to perform after region open to complete deploy of region on 61 * regionserver 62 * @param r Region to open. 63 * @param ct Instance of {@link CatalogTracker} 64 * @param daughter True if this is daughter of a split 65 * @throws KeeperException 66 * @throws IOException 67 */ 68 public void postOpenDeployTasks(final HRegion r, final CatalogTracker ct, 69 final boolean daughter) 70 throws KeeperException, IOException; 71 72 /** 73 * Returns a reference to the RPC server metrics. 74 */ 75 public HBaseRpcMetrics getRpcMetrics(); 76 77 /** 78 * Get the regions that are currently being opened or closed in the RS 79 * @return set of regions in transition in this RS 80 */ 81 public Set<byte[]> getRegionsInTransitionInRS(); 82 }