001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.procedure2; 019 020import org.apache.hadoop.hbase.regionserver.HRegionServer; 021import org.apache.yetus.audience.InterfaceAudience; 022 023@InterfaceAudience.Private 024public abstract class BaseRSProcedureCallable implements RSProcedureCallable { 025 026 protected HRegionServer rs; 027 028 private Exception initError; 029 030 @Override 031 public final Void call() throws Exception { 032 if (initError != null) { 033 throw initError; 034 } 035 doCall(); 036 return null; 037 } 038 039 @Override 040 public final void init(byte[] parameter, HRegionServer rs) { 041 this.rs = rs; 042 try { 043 initParameter(parameter); 044 } catch (Exception e) { 045 initError = e; 046 } 047 } 048 049 protected abstract void doCall() throws Exception; 050 051 protected abstract void initParameter(byte[] parameter) throws Exception; 052}