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 */ 018 package org.apache.oozie.action.hadoop; 019 020 import java.io.IOException; 021 import java.io.StringWriter; 022 import java.util.Collection; 023 import java.util.Map; 024 025 public abstract class LauncherMain { 026 027 protected static void run(Class<? extends LauncherMain> klass, String[] args) throws Exception { 028 LauncherMain main = klass.newInstance(); 029 main.run(args); 030 } 031 032 protected abstract void run(String[] args) throws Exception; 033 034 /** 035 * Write to STDOUT (the task log) the Configuration/Properties values. All properties that contain 036 * any of the strings in the maskSet will be masked when writting it to STDOUT. 037 * 038 * @param header message for the beginning of the Configuration/Properties dump. 039 * @param maskSet set with substrings of property names to mask. 040 * @param conf Configuration/Properties object to dump to STDOUT 041 * @throws IOException thrown if an IO error ocurred. 042 */ 043 @SuppressWarnings("unchecked") 044 protected static void logMasking(String header, Collection<String> maskSet, Iterable conf) throws IOException { 045 StringWriter writer = new StringWriter(); 046 writer.write(header + "\n"); 047 writer.write("--------------------\n"); 048 for (Map.Entry entry : (Iterable<Map.Entry>) conf){ 049 String name = (String) entry.getKey(); 050 String value = (String) entry.getValue(); 051 for (String mask : maskSet) { 052 if (name.contains(mask)) { 053 value = "*MASKED*"; 054 } 055 } 056 writer.write(" " + name + " : " + value + "\n"); 057 } 058 writer.write("--------------------\n"); 059 writer.close(); 060 System.out.println(writer.toString()); 061 System.out.flush(); 062 } 063 064 } 065 066 class LauncherMainException extends Exception { 067 private int errorCode; 068 069 public LauncherMainException(int code) { 070 errorCode = code; 071 } 072 073 int getErrorCode() { 074 return errorCode; 075 } 076 }