The version of Apache log4j used by SoundHelix.

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v1_2_12 :: tests / src / java / org / apache / log4j /

AsyncAppenderTestCase.java

/*
 * Copyright 1999-2005 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 org.apache.log4j;

import junit.framework.TestCase;
import junit.framework.TestSuite;
import junit.framework.Test;

import java.util.Vector;

import org.apache.log4j.*;
import org.apache.log4j.varia.NullAppender;

/**
   A superficial but general test of log4j.
 */
public class AsyncAppenderTestCase extends TestCase {

  public AsyncAppenderTestCase(String name) {
    super(name);
  }

  public void setUp() {
  }

  public void tearDown() {
    LogManager.shutdown();
  }

  // this test checks whether it is possible to write to a closed AsyncAppender
  public void closeTest() throws Exception {    
    Logger root = Logger.getRootLogger();
    Layout layout = new SimpleLayout();
    VectorAppender vectorAppender = new VectorAppender();
    AsyncAppender asyncAppender = new AsyncAppender();
    asyncAppender.setName("async-CloseTest");
    asyncAppender.addAppender(vectorAppender);
    root.addAppender(asyncAppender); 

    root.debug("m1");
    asyncAppender.close();
    root.debug("m2");
    
    Vector v = vectorAppender.getVector();
    assertEquals(v.size(), 1);
  }

  // this test checks whether appenders embedded within an AsyncAppender are also 
  // closed 
  public void test2() {
    Logger root = Logger.getRootLogger();
    Layout layout = new SimpleLayout();
    VectorAppender vectorAppender = new VectorAppender();
    AsyncAppender asyncAppender = new AsyncAppender();
    asyncAppender.setName("async-test2");
    asyncAppender.addAppender(vectorAppender);
    root.addAppender(asyncAppender); 

    root.debug("m1");
    asyncAppender.close();
    root.debug("m2");
    
    Vector v = vectorAppender.getVector();
    assertEquals(v.size(), 1);
    assertTrue(vectorAppender.isClosed());
  }

  // this test checks whether appenders embedded within an AsyncAppender are also 
  // closed 
  public void test3() {
    int LEN = 200;
    Logger root = Logger.getRootLogger();
    Layout layout = new SimpleLayout();
    VectorAppender vectorAppender = new VectorAppender();
    AsyncAppender asyncAppender = new AsyncAppender();
    asyncAppender.setName("async-test3");
    asyncAppender.addAppender(vectorAppender);
    root.addAppender(asyncAppender); 

    for(int i = 0; i < LEN; i++) {
      root.debug("message"+i);
    }
    
    System.out.println("Done loop.");
    System.out.flush();
    asyncAppender.close();
    root.debug("m2");
    
    Vector v = vectorAppender.getVector();
    assertEquals(v.size(), LEN);
    assertTrue(vectorAppender.isClosed());
  }

    private static class NullPointerAppender extends AppenderSkeleton {
          public NullPointerAppender() {
          }


          /**
             This method is called by the {@link org.apache.log4j.AppenderSkeleton#doAppend}
             method.

          */
          public void append(org.apache.log4j.spi.LoggingEvent event) {
              throw new NullPointerException();
          }

          public void close() {
          }

          public boolean requiresLayout() {
            return false;
          }
    }


    /**
     * Tests that a bad appender will switch async back to sync.
     * See bug 23021
     * @since 1.2.12
     * @throws Exception thrown if Thread.sleep is interrupted
     */
    public void testBadAppender() throws Exception {
        Appender nullPointerAppender = new NullPointerAppender();
        AsyncAppender asyncAppender = new AsyncAppender();
        asyncAppender.addAppender(nullPointerAppender);
        asyncAppender.setBufferSize(5);
        asyncAppender.activateOptions();
        Logger root = Logger.getRootLogger();
        root.addAppender(nullPointerAppender);
        try {
           root.info("Message");
           Thread.sleep(10);
           root.info("Message");
           fail("Should have thrown exception");
        } catch(NullPointerException ex) {

        }
    }
}
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