1 /*
   2  * Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 
  27 package java.util.logging;
  28 
  29 import java.io.*;
  30 import java.text.*;
  31 import java.util.Date;
  32 
  33 /**
  34  * Print a brief summary of the LogRecord in a human readable
  35  * format.  The summary will typically be 1 or 2 lines.
  36  *
  37  * @since 1.4
  38  */
  39 
  40 public class SimpleFormatter extends Formatter {
  41 
  42     Date dat = new Date();
  43     private final static String format = "{0,date} {0,time}";
  44     private MessageFormat formatter;
  45 
  46     private Object args[] = new Object[1];
  47 
  48     // Line separator string.  This is the value of the line.separator
  49     // property at the moment that the SimpleFormatter was created.
  50     private String lineSeparator = java.security.AccessController.doPrivileged(
  51                new sun.security.action.GetPropertyAction("line.separator"));
  52 
  53     /**
  54      * Format the given LogRecord.
  55      * <p>
  56      * This method can be overridden in a subclass.
  57      * It is recommended to use the {@link Formatter#formatMessage}
  58      * convenience method to localize and format the message field.
  59      *
  60      * @param record the log record to be formatted.
  61      * @return a formatted log record
  62      */
  63     public synchronized String format(LogRecord record) {
  64         StringBuffer sb = new StringBuffer();
  65         // Minimize memory allocations here.
  66         dat.setTime(record.getMillis());
  67         args[0] = dat;
  68         StringBuffer text = new StringBuffer();
  69         if (formatter == null) {
  70             formatter = new MessageFormat(format);
  71         }
  72         formatter.format(args, text, null);
  73         sb.append(text);
  74         sb.append(" ");
  75         if (record.getSourceClassName() != null) {
  76             sb.append(record.getSourceClassName());
  77         } else {
  78             sb.append(record.getLoggerName());
  79         }
  80         if (record.getSourceMethodName() != null) {
  81             sb.append(" ");
  82             sb.append(record.getSourceMethodName());
  83         }
  84         sb.append(lineSeparator);
  85         String message = formatMessage(record);
  86         sb.append(record.getLevel().getLocalizedName());
  87         sb.append(": ");
  88         sb.append(message);
  89         sb.append(lineSeparator);
  90         if (record.getThrown() != null) {
  91             try {
  92                 StringWriter sw = new StringWriter();
  93                 PrintWriter pw = new PrintWriter(sw);
  94                 record.getThrown().printStackTrace(pw);
  95                 pw.close();
  96                 sb.append(sw.toString());
  97             } catch (Exception ex) {
  98             }
  99         }
 100         return sb.toString();
 101     }
 102 }