The version of Apache log4j used by SoundHelix.

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v1.3alpha8 :: src / java / org / apache / log4j /

TTCCLayout.java

/*
 * Copyright 1999,2004 The Apache Software Foundation.
 *
 * Licensed 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.
 */

// Contributors: Christopher Williams
//               Mathias Bogaert
package org.apache.log4j;

import org.apache.log4j.helpers.Constants;
import org.apache.log4j.spi.LoggingEvent;



/**
 TTCC layout format consists of time, thread, category and nested
 diagnostic context information, hence the name.

 <p>Each of the four fields can be individually enabled or
 disabled. The time format depends on the <code>DateFormat</code>
 used.

 <p>Here is an example TTCCLayout output with the
 {@link org.apache.log4j.helpers.RelativeTimeDateFormat}.

 <pre>
176 [main] INFO  org.apache.log4j.examples.Sort - Populating an array of 2 elements in reverse order.
225 [main] INFO  org.apache.log4j.examples.SortAlgo - Entered the sort method.
262 [main] DEBUG org.apache.log4j.examples.SortAlgo.OUTER i=1 - Outer loop.
276 [main] DEBUG org.apache.log4j.examples.SortAlgo.SWAP i=1 j=0 - Swapping intArray[0] = 1 and intArray[1] = 0
290 [main] DEBUG org.apache.log4j.examples.SortAlgo.OUTER i=0 - Outer loop.
304 [main] INFO  org.apache.log4j.examples.SortAlgo.DUMP - Dump of interger array:
317 [main] INFO  org.apache.log4j.examples.SortAlgo.DUMP - Element [0] = 0
331 [main] INFO  org.apache.log4j.examples.SortAlgo.DUMP - Element [1] = 1
343 [main] INFO  org.apache.log4j.examples.Sort - The next log statement should be an error message.
346 [main] ERROR org.apache.log4j.examples.SortAlgo.DUMP - Tried to dump an uninitialized array.
        at org.apache.log4j.examples.SortAlgo.dump(SortAlgo.java:58)
        at org.apache.log4j.examples.Sort.main(Sort.java:64)
467 [main] INFO  org.apache.log4j.examples.Sort - Exiting main method.
</pre>

  <p>The first field is the number of milliseconds elapsed since the
  start of the program. The second field is the thread outputting the
  log statement. The third field is the level, the fourth field is
  the category to which the statement belongs.

  <p>The fifth field (just before the '-') is the nested diagnostic
  context.  Note the nested diagnostic context may be empty as in the
  first two statements. The text after the '-' is the message of the
  statement.

  <p>{@link PatternLayout} offers a much more flexible alternative.

  @author Ceki G&uuml;lc&uuml;
  @author <A HREF="mailto:heinz.richter@ecmwf.int">Heinz Richter</a>
  @deprecated Please use {@link PatternLayout} instead.
*/
public class TTCCLayout extends org.apache.log4j.helpers.DateLayout {
  // Internal representation of options
  private boolean threadPrinting = true;
  private boolean categoryPrefixing = true;
  private boolean contextPrinting = true;
  protected final StringBuffer buf = new StringBuffer(64);

  /**
   * Instantiate a TTCCLayout object with in the ISO8601 format as the date
   * formatter.
   * */
  public TTCCLayout() {
    this.setDateFormat(Constants.ISO8601_FORMAT);
  }

  /**
     Instantiate a TTCCLayout object using the local time zone. The
     DateFormat used will depend on the <code>dateFormatType</code>.

     <p>This constructor just calls the {@link #setDateFormat} method.
  */
  public TTCCLayout(String dateFormatType) {
    this.setDateFormat(dateFormatType);
  }


  public void activateOptions() {
  }

  /**
     The <b>ThreadPrinting</b> option specifies whether the name of the
     current thread is part of log output or not. This is true by default.
   */
  public void setThreadPrinting(boolean threadPrinting) {
    this.threadPrinting = threadPrinting;
  }

  /**
     Returns value of the <b>ThreadPrinting</b> option.
   */
  public boolean getThreadPrinting() {
    return threadPrinting;
  }

  /**
     The <b>CategoryPrefixing</b> option specifies whether {@link Category}
     name is part of log output or not. This is true by default.
   */
  public void setCategoryPrefixing(boolean categoryPrefixing) {
    this.categoryPrefixing = categoryPrefixing;
  }

  /**
     Returns value of the <b>CategoryPrefixing</b> option.
   */
  public boolean getCategoryPrefixing() {
    return categoryPrefixing;
  }

  /**
     The <b>ContextPrinting</b> option specifies log output will include
     the nested context information belonging to the current thread.
     This is true by default.
   */
  public void setContextPrinting(boolean contextPrinting) {
    this.contextPrinting = contextPrinting;
  }

  /**
     Returns value of the <b>ContextPrinting</b> option.
   */
  public boolean getContextPrinting() {
    return contextPrinting;
  }


  /**
   In addition to the level of the statement and message, the
   returned byte array includes time, thread, category and {@link NDC}
   information.

   <p>Time, thread, category and diagnostic context are printed
   depending on options.
  */
  public String format(final LoggingEvent event) {
    buf.setLength(0);
    dateFormat(buf, event);

    if (this.threadPrinting) {
      buf.append('[');
      buf.append(event.getThreadName());
      buf.append("] ");
    }

    buf.append(event.getLevel().toString());
    buf.append(' ');

    if (this.categoryPrefixing) {
      buf.append(event.getLoggerName());
      buf.append(' ');
    }

    if (this.contextPrinting) {
      String ndc = event.getNDC();

      if (ndc != null) {
        buf.append(ndc);
        buf.append(' ');
      }
    }

    buf.append("- ");
    buf.append(event.getRenderedMessage());
    buf.append(LINE_SEP);
    return buf.toString();
  }
}
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