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.util; 019 020import org.apache.hadoop.conf.Configuration; 021import org.apache.hadoop.hbase.HBaseConfiguration; 022import org.apache.hadoop.hbase.HBaseInterfaceAudience; 023import org.apache.hadoop.hbase.logging.Log4jUtils; 024import org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil; 025import org.apache.hadoop.util.Tool; 026import org.apache.hadoop.util.ToolRunner; 027import org.apache.yetus.audience.InterfaceAudience; 028 029/** 030 * Generate a classpath string containing any jars required by mapreduce jobs. Specify additional 031 * values by providing a comma-separated list of paths via -Dtmpjars. 032 */ 033@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.TOOLS) 034public class MapreduceDependencyClasspathTool implements Tool { 035 036 private Configuration conf; 037 038 @Override 039 public void setConf(Configuration conf) { 040 this.conf = conf; 041 } 042 043 @Override 044 public Configuration getConf() { 045 return conf; 046 } 047 048 @Override 049 public int run(String[] args) throws Exception { 050 if (args.length > 0) { 051 System.err.println("Usage: hbase mapredcp [-Dtmpjars=...]"); 052 System.err 053 .println(" Construct a CLASSPATH containing dependency jars required to run a mapreduce"); 054 System.err 055 .println(" job. By default, includes any jars detected by TableMapReduceUtils. Provide"); 056 System.err.println(" additional entries by specifying a comma-separated list in tmpjars."); 057 return 0; 058 } 059 060 TableMapReduceUtil.addHBaseDependencyJars(getConf()); 061 System.out.println(TableMapReduceUtil.buildDependencyClasspath(getConf())); 062 return 0; 063 } 064 065 public static void main(String[] argv) throws Exception { 066 // Silence the usual noise. This is probably fragile... 067 Log4jUtils.setLogLevel("org.apache.hadoop.hbase", "WARN"); 068 System.exit( 069 ToolRunner.run(HBaseConfiguration.create(), new MapreduceDependencyClasspathTool(), argv)); 070 } 071}