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 30 /** 31 * Services provided by {@link HRegionServer} 32 */ 33 public interface RegionServerServices extends OnlineRegions { 34 /** 35 * @return True if this regionserver is stopping. 36 */ 37 public boolean isStopping(); 38 39 /** @return the HLog */ 40 public HLog getWAL(); 41 42 /** 43 * @return Implementation of {@link CompactionRequestor} or null. 44 */ 45 public CompactionRequestor getCompactionRequester(); 46 47 /** 48 * @return Implementation of {@link FlushRequester} or null. 49 */ 50 public FlushRequester getFlushRequester(); 51 52 /** 53 * Return data structure that has Server address and startcode. 54 * @return The HServerInfo for this RegionServer. 55 */ 56 public HServerInfo getServerInfo(); 57 58 /** 59 * Tasks to perform after region open to complete deploy of region on 60 * regionserver 61 * @param r Region to open. 62 * @param ct Instance of {@link CatalogTracker} 63 * @param daughter True if this is daughter of a split 64 * @throws KeeperException 65 * @throws IOException 66 */ 67 public void postOpenDeployTasks(final HRegion r, final CatalogTracker ct, 68 final boolean daughter) 69 throws KeeperException, IOException; 70 71 /** 72 * Returns a reference to the RPC server metrics. 73 */ 74 public HBaseRpcMetrics getRpcMetrics(); 75 }