The version of Apache log4j used by SoundHelix.

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v1.3alpha8 :: examples / src / trivial /

Trivial.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.
 */

package trivial;

import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Logger;
import org.apache.log4j.NDC;


/**
   View the <a href="doc-files/Trivial.java">source code</a> of this a
   trivial usage example. Running <code>java examples.Trivial</code>
   should output something similar to:

   <pre>
      0    INFO  [main] examples.Trivial (Client #45890) - Awake awake. Put on thy strength.
      15   DEBUG [main] examples.Trivial (Client #45890 DB) - Now king David was old.
      278  INFO  [main] examples.Trivial$InnerTrivial (Client #45890) - Entered foo.
      293  INFO  [main] examples.Trivial (Client #45890) - Exiting Trivial.
   </pre>

   <p> The increasing numbers at the beginning of each line are the
   times elapsed since the start of the program. The string between
   the parentheses is the nested diagnostic context.

   <p>See {@link Sort} and {@link SortAlgo} for sligtly more elaborate
   examples.

   <p>Note thent class files for the example code is not included in
   any of the distributed log4j jar files. You will have to add the
   directory <code>/dir-where-you-unpacked-log4j/classes</code> to
   your classpath before trying out the examples.

 */
public class Trivial {
  static Logger logger = Logger.getLogger(Trivial.class.getName());

  public static void main(String[] args) {
    BasicConfigurator.configure();
    NDC.push("Client #45890");

    logger.info("Awake awake. Put on thy strength.");
    Trivial.foo();
    InnerTrivial.foo();
    logger.info("Exiting Trivial.");
  }

  static void foo() {
    NDC.push("DB");
    logger.debug("Now king David was old.");
    NDC.pop();
  }

  static class InnerTrivial {
    static Logger logger = Logger.getLogger(InnerTrivial.class.getName());

    static void foo() {
      logger.info("Entered foo.");
    }
  }
}
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