Java 类org.apache.log4j.varia.NullAppender 实例源码

public static void setupLogger(Config config) throws IOException {

        Layout layout = new PatternLayout("%d{" + DATE_FORMAT + "} %5p: %m%n");

        Appender appender = new DailyRollingFileAppender(
                layout, config.getString("logger.file"), "'.'yyyyMMdd");

        LogManager.resetConfiguration();
        LogManager.getRootLogger().addAppender(new NullAppender());

        logger = Logger.getLogger(LOGGER_NAME);
        logger.addAppender(appender);
        logger.setLevel(Level.toLevel(config.getString("logger.level"), Level.ALL));

        // Workaround for "Bug 745866 - (EDG-45) Possible netty logging config problem"
        InternalLoggerFactory.setDefaultFactory(new InternalLoggerFactory() {
            @Override
            public InternalLogger newInstance(String string) {
                return new NettyInternalLogger();
            }
        });

        Log.logSystemInfo();
        Log.info("Version: " + getAppVersion());
    }

/**
 * Sets up the verbose and debug mode depending on mvn logging level, and
 * sets up hyperjaxb logging.
 */
protected void setupLogging() {
    super.setupLogging();

    final Logger rootLogger = LogManager.getRootLogger();
    rootLogger.addAppender(new NullAppender());
    final Logger logger = LogManager.getLogger("org.jvnet.hyperjaxb3");

    final Log log = getLog();
    logger.addAppender(new Appender(getLog(), new PatternLayout(
            "%m%n        %c%n")));

    if (this.getDebug()) {
        log.debug("Logger level set to [debug].");
        logger.setLevel(Level.DEBUG);
    } else if (this.getVerbose())
        logger.setLevel(Level.INFO);
    else if (log.isWarnEnabled())
        logger.setLevel(Level.WARN);
    else
        logger.setLevel(Level.ERROR);
}

/***/
@BeforeClass
public static void beforeClass() {
    if (!DEBUG) {
        getRootLogger().removeAllAppenders();
        getRootLogger().addAppender(new NullAppender());
    }
}

@BeforeClass
public static void setUp() throws Exception {
    LOGGER.removeAllAppenders();
    LOGGER.addAppender(new NullAppender());
    index = new SearchResultIndex(PATH, INDEX, 10);
    SearchResult result = readFile("exampleSearchResult.json");
    index.offer(result);
    index.flush();
}

@BeforeClass
public static void setUp() throws Exception {
    LOGGER.removeAllAppenders();
    LOGGER.addAppender(new NullAppender());
    engines = new ResourceIndex(PATH, INDEX);
    Resource engine = searsia();
    engines.putMother(engine);
}

/**
 * Constructor used for MySQL
 * 
 * @param host
 * @param port
 * @param database
 * @param username
 * @param password
 * @throws SQLException 
 */
public DataSourceHandler(final String host, final String port, final String database, final String username, final String password) throws SQLException{
    // Check database's informations and init connection
    this.host = Preconditions.checkNotNull(host);
    this.port = Preconditions.checkNotNull(port);
    this.database = Preconditions.checkNotNull(database);
    this.username = Preconditions.checkNotNull(username);
    this.password = Preconditions.checkNotNull(password);

    BAT.getInstance().getLogger().config("Initialization of HikariCP in progress ...");
    BasicConfigurator.configure(new NullAppender());
    ds = new HikariDataSource();
    ds.setJdbcUrl("jdbc:mysql://" + this.host + ":" + this.port + "/" + this.database + 
            "?useLegacyDatetimeCode=false&serverTimezone=" + TimeZone.getDefault().getID());
    ds.setUsername(this.username);
    ds.setPassword(this.password);
    ds.addDataSourceProperty("cachePrepStmts", "true");
    ds.setMaximumPoolSize(8);
    try {
        final Connection conn = ds.getConnection();
        int intOffset = Calendar.getInstance().getTimeZone().getOffset(Calendar.getInstance().getTimeInMillis()) / 1000;
        String offset = String.format("%02d:%02d", Math.abs(intOffset / 3600), Math.abs((intOffset / 60) % 60));
        offset = (intOffset >= 0 ? "+" : "-") + offset;
        conn.createStatement().executeQuery("SET time_zone='" + offset + "';");
        conn.close();
        BAT.getInstance().getLogger().config("BoneCP is loaded !");
    } catch (final SQLException e) {
        BAT.getInstance().getLogger().severe("BAT encounters a problem during the initialization of the database connection."
                + " Please check your logins and database configuration.");
        if(e.getCause() instanceof CommunicationsException){
            BAT.getInstance().getLogger().severe(e.getCause().getMessage());
        }
        if(BAT.getInstance().getConfiguration().isDebugMode()){
            BAT.getInstance().getLogger().log(Level.SEVERE, e.getMessage(), e);
        }
        throw e;
    }
    sqlite = false;
}

/**
 * Disables all loggers.
 */
@BeforeClass
public static void init() {

    // remove all of them
    Logger.getRootLogger().removeAllAppenders();
    Logger.getRootLogger().addAppender(new NullAppender());

    final File modelLocation = new File("_data/",
            "tidaDbMinuteLoadingPerformance");
    assertTrue(Files.deleteDir(modelLocation));
}

@Before
public void instrumentLoggingForTesting() {
  loggingEvents.clear();
  appender = new NullAppender() {
    @Override
    public void doAppend(LoggingEvent event) {
      loggingEvents.add(event);
    }
  };
  Logger.getLogger(Appmon4jDumper.class).addAppender(appender);
}

/**
 * Main method
 *
 * @param args Program arguments
 */
public static void main(String[] args) {
    org.apache.log4j.BasicConfigurator.configure(new NullAppender());
    java.util.logging.Logger.getLogger("org.hibernate").setLevel(OFF);
    Application.launch(args);
}

@BeforeClass
public static void configureLogger() throws Exception {
    BasicConfigurator.configure(new NullAppender());
}

@BeforeClass
public static void configureLog4J() {
    BasicConfigurator.configure(new NullAppender());
}

@BeforeClass
public static void configureLog4J() {
    BasicConfigurator.configure(new NullAppender());
}

/**
 * Simply configure the primary log4j Loggers to send all output to the bit bucket.
 */
public static void configurePrimaryLoggerToSwallowLogs() {
  org.apache.log4j.BasicConfigurator.configure(new NullAppender());
}

private void setLoggerDefaultOptions()
{
    org.apache.log4j.Logger root = org.apache.log4j.Logger.getRootLogger();
    root.addAppender(new NullAppender());
    root.setLevel(Level.INFO);
}