| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package com.datatorrent.stram.debug; |
| |
| import java.io.PrintStream; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.log4j.Appender; |
| import org.apache.log4j.RollingFileAppender; |
| |
| /** |
| * <p>StdOutErrLog class.</p> |
| * |
| * @since 0.3.2 |
| */ |
| public class StdOutErrLog |
| { |
| public static final String DT_LOG_APPENDER = "DT"; |
| public static final String DT_LOGDIR = "dt.logdir"; |
| |
| @SuppressWarnings("UseOfSystemOutOrSystemErr") |
| public static void tieSystemOutAndErrToLog() |
| { |
| |
| org.apache.log4j.Logger rootLogger = org.apache.log4j.Logger.getRootLogger(); |
| Appender appender = rootLogger.getAppender(DT_LOG_APPENDER); |
| if (appender instanceof RollingFileAppender) { |
| RollingFileAppender rfa = (RollingFileAppender)appender; |
| if (rfa.getFile() == null || rfa.getFile().isEmpty()) { |
| rfa.setFile(System.getProperty(DT_LOGDIR)); |
| rfa.activateOptions(); |
| } |
| } else if (appender != null) { |
| logger.warn("found appender {} instead of RollingFileAppender", appender); |
| } |
| |
| System.setOut(createLoggingProxy(System.out)); |
| System.setErr(createLoggingProxy(System.err)); |
| } |
| |
| public static PrintStream createLoggingProxy(final PrintStream realPrintStream) |
| { |
| return new PrintStream(realPrintStream) |
| { |
| @Override |
| public void print(final String string) |
| { |
| realPrintStream.print(string); |
| //logger.info(string); |
| } |
| |
| }; |
| } |
| |
| private static final Logger logger = LoggerFactory.getLogger(StdOutErrLog.class); |
| } |