Examples of java.util.logging.Filter

java.util.logging.Filter
A Filter can be used to provide fine grain control over what is logged, beyond the control provided by log levels.
Each Logger and each Handler can have a filter associated with it. The Logger or Handler will call the isLoggable method to check if a given LogRecord should be published. If isLoggable returns false, the LogRecord will be discarded. @version 1.6, 11/17/05 @since 1.4

        
        Logger logger = 
            Logger.getLogger("com.sun.sgs.impl.service.nodemap.server");
        Level oldLevel = logger.getLevel();
        logger.setLevel(Level.INFO);
        logger.setFilter(new Filter() {
            public boolean isLoggable(LogRecord record) {
                if (record.getLevel() == Level.WARNING) {
                    // Tell the parent thread we've seen a WARNING message.
                    try { 
                        errorExchanger.exchange(Boolean.TRUE);

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      for (int i = 0; i < handlers.length; i++)
      {
         Handler handler = handlers[i];
         if (handler instanceof ConsoleHandler)
         {
            Filter filter = new Filter()
            {
               public boolean isLoggable(LogRecord record)
               {
                  String name = record.getLoggerName();
                  for (String ns : namespaces)

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        }
        internalLog(lr);
    }


    protected void internalLog(LogRecord record) {
        Filter filter = getFilter();
        if (filter != null && !filter.isLoggable(record)) {
            return;
        }
        String msg = formatMessage(record);
        internalLogFormatted(msg, record);
    }

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   * privilege.
   */
  public void testGetSetFilter_NamedLoggerInsufficientPrivilege() {
    Logger log = Logger
        .getLogger("testGetSetFilter_NamedLoggerInsufficientPrivilege");
    Filter f = new MockFilter();
    SecurityManager oldMan = System.getSecurityManager();
    System.setSecurityManager(new MockSecurityManager());
    try {
      log.setFilter(f);
      fail("Should throw SecurityException!");

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  /*
   * Test setFilter for an anonymous logger with sufficient privilege.
   */
  public void testSetFilter_AnonyLoggerSufficientPrivilege() {
    Logger log = Logger.getAnonymousLogger();
    Filter f = new MockFilter();
    assertNull(log.getFilter());
    log.setFilter(f);
    assertSame(f, log.getFilter());
  }

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  /*
   * Test setFilter for an anonymous logger with insufficient privilege.
   */
  public void testSetFilter_AnonyLoggerInsufficientPrivilege() {
    Logger log = Logger.getAnonymousLogger();
    Filter f = new MockFilter();
    SecurityManager oldMan = System.getSecurityManager();
    System.setSecurityManager(new MockSecurityManager());
    try {
      assertNull(log.getFilter());
      log.setFilter(f);

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  /*
   * Test setFilter for a null-named mock logger with insufficient privilege.
   */
  public void testSetFilter_NullNamedMockLoggerInsufficientPrivilege() {
    MockLogger mlog = new MockLogger(null, null);
    Filter f = new MockFilter();
    SecurityManager oldMan = System.getSecurityManager();
    System.setSecurityManager(new MockSecurityManager());
    try {
      mlog.setFilter(f);
      fail("Should throw SecurityException!");

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        }
        internalLog(lr);
    }


    protected void internalLog(LogRecord record) {
        Filter filter = getFilter();
        if (filter != null && !filter.isLoggable(record)) {
            return;
        }
        String msg = formatMessage(record);
        internalLogFormatted(msg, record);
    }

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        }
        internalLog(lr);
    }


    protected void internalLog(LogRecord record) {
        Filter filter = getFilter();
        if (filter != null && !filter.isLoggable(record)) {
            return;
        }
        String msg = formatMessage(record);
        internalLogFormatted(msg, record);
    }

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         * The filter should always be null since we overrode the 'setFilter' method as a no-op.
         * But we check it anyway as matter of principle just in case some subclass overrides the
         * 'getFilter()' method. This is the only method where we can do this check cheaply. Note
         * that this is NOT the check for logging level; Filters are for user-specified criterions.
         */
        final Filter filter = getFilter();
        if (filter != null && !filter.isLoggable(record)) {
            return;
        }
        Level     level        = record.getLevel();
        String    sourceClass  = record.getSourceClassName();
        String    sourceMethod = record.getSourceMethodName();

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