/*
    * 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 org.apache.hadoop.chukwa.inputtools.log4j;
  
  
  import org.apache.log4j.*;
  import org.apache.log4j.spi.LoggingEvent;
  
  public class OneLineLogLayout extends PatternLayout {
  
    char SEP = ' ';
  
    public String format(LoggingEvent evt) {
  
      String initial_s = super.format(evt);
      StringBuilder sb = new StringBuilder();
      for (int i = 0; i < initial_s.length() - 1; ++i) {
        char c = initial_s.charAt(i);
        if (c == '\n')
          sb.append(SEP);
        else
          sb.append(c);
      }
      sb.append(SEP);
      String[] s = evt.getThrowableStrRep();
      if (s != null) {
        int len = s.length;
        for (int i = 0; i < len; i++) {
          sb.append(s[i]);
          sb.append(SEP);
        }
      }
  
      sb.append('\n');
      return sb.toString();
    }
  
    public boolean ignoresThrowable() {
      return false;
    }
  
    public static void main(String[] args) {
      System.setProperty("line.separator", " ");
      Logger l = Logger.getRootLogger();
      l.removeAllAppenders();
      Appender appender = new ConsoleAppender(new OneLineLogLayout());
      appender.setName("console");
      l.addAppender(appender);
      l.warn("testing", new java.io.IOException("just kidding!"));
  
    }
  
  }