org.apache.log4j.Logger类的使用及代码示例

x33g5p2x  于2022-01-23 转载在 其他  
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本文整理了Java中org.apache.log4j.Logger类的一些代码示例，展示了Logger类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Logger类的具体详情如下：
包路径：org.apache.log4j.Logger
类名称：Logger

Logger介绍

[英]This is the central class in the log4j package. Most logging operations, except configuration, are done through this class.
[中]这是log4j包中的中心类。除配置外，大多数日志记录操作都是通过此类完成的。

代码示例

代码示例来源：origin: log4j/log4j

  1. /** Listens for client connections **/
  2.   public void run() {
  3.     LOG.info("Thread started");
  4.     try {
  5.       while (true) {
  6.         LOG.debug("Waiting for a connection");
  7.         final Socket client = mSvrSock.accept();
  8.         LOG.debug("Got a connection from " +
  9.              client.getInetAddress().getHostName());
  10.         final Thread t = new Thread(new Slurper(client));
  11.         t.setDaemon(true);
  12.         t.start();
  13.       }
  14.     } catch (IOException e) {
  15.       LOG.error("Error in accepting connections, stopping.", e);
  16.     }
  17.   }
  18. }

代码示例来源：origin: log4j/log4j

  1. static
  2.  void roll() {
  3.   try {
  4.    Socket socket = new Socket(host, port);
  5.    DataOutputStream dos = new DataOutputStream(socket.getOutputStream());
  6.    DataInputStream dis = new DataInputStream(socket.getInputStream());
  7.    dos.writeUTF(ExternallyRolledFileAppender.ROLL_OVER);
  8.    String rc = dis.readUTF();
  9.    if(ExternallyRolledFileAppender.OK.equals(rc)) {
  10.   cat.info("Roll over signal acknowledged by remote appender.");
  11.    } else {
  12.   cat.warn("Unexpected return code "+rc+" from remote entity.");
  13.   System.exit(2);
  14.    }
  15.   } catch(IOException e) {
  16.    cat.error("Could not send roll signal on host "+host+" port "+port+" .",
  17.     e);
  18.    System.exit(2);
  19.   }
  20.   System.exit(0);
  21.  }
  22. }

代码示例来源：origin: apache/incubator-dubbo

  1. @Override
  2. public boolean isDebugEnabled() {
  3.   return logger.isDebugEnabled();
  4. }

代码示例来源：origin: netty/netty

  1. /**
  2.  * Is this logger instance enabled for the TRACE level?
  3.  *
  4.  * @return True if this Logger is enabled for level TRACE, false otherwise.
  5.  */
  6. @Override
  7. public boolean isTraceEnabled() {
  8.   if (traceCapable) {
  9.     return logger.isTraceEnabled();
  10.   } else {
  11.     return logger.isDebugEnabled();
  12.   }
  13. }

代码示例来源：origin: code4craft/webmagic

  1. private static void configLogger(String value) {
  2.     Logger rootLogger = Logger.getRootLogger();
  3.     if ("debug".equalsIgnoreCase(value)) {
  4.       rootLogger.setLevel(Level.DEBUG);
  5.     } else if ("info".equalsIgnoreCase(value)) {
  6.       rootLogger.setLevel(Level.INFO);
  7.     } else if ("warn".equalsIgnoreCase(value)) {
  8.       rootLogger.setLevel(Level.WARN);
  9.     } else if ("trace".equalsIgnoreCase(value)) {
  10.       rootLogger.setLevel(Level.TRACE);
  11.     } else if ("off".equalsIgnoreCase(value)) {
  12.       rootLogger.setLevel(Level.OFF);
  13.     } else if ("error".equalsIgnoreCase(value)) {
  14.       rootLogger.setLevel(Level.ERROR);
  15.     }
  16.   }
  17. }

代码示例来源：origin: log4j/log4j

  1. public void onMessage(javax.jms.Message message) {
  2.  LoggingEvent event;
  3.  Logger remoteLogger;
  4.  try {
  5.   if(message instanceof  ObjectMessage) {
  6.  ObjectMessage objectMessage = (ObjectMessage) message;
  7.  event = (LoggingEvent) objectMessage.getObject();
  8.  remoteLogger = Logger.getLogger(event.getLoggerName());
  9.  remoteLogger.callAppenders(event);
  10.   } else {
  11.  logger.warn("Received message is of type "+message.getJMSType()
  12.      +", was expecting ObjectMessage.");
  13.   }      
  14.  } catch(JMSException jmse) {
  15.   logger.error("Exception thrown while processing incoming message.", 
  16.      jmse);
  17.  }
  18. }

代码示例来源：origin: iluwatar/java-design-patterns

  1. private void mutedClose(Connection connection, PreparedStatement statement, ResultSet resultSet) {
  2.  try {
  3.   resultSet.close();
  4.   statement.close();
  5.   connection.close();
  6.  } catch (SQLException e) {
  7.   LOGGER.info("Exception thrown " + e.getMessage());
  8.  }
  9. }

代码示例来源：origin: alibaba/druid

  1. @Override
  2. protected void statementLog(String message) {
  3.   statementLogger.debug(message);
  4. }

代码示例来源：origin: alibaba/druid

  1. @Override
  2.   protected void statementLogError(String message, Throwable error) {
  3.     statementLogger.error(message, error);
  4.   }
  5. }

代码示例来源：origin: log4j/log4j

  1. /**
  2.    * Starts instance of HtmlAdapterServer.
  3.    * @deprecated
  4.    */
  5.  public void start() {
  7.   MBeanServer server = MBeanServerFactory.createMBeanServer();
  8.   Object html = createServer();
  10.   try {
  11.    log.info("Registering HtmlAdaptorServer instance.");
  12.    server.registerMBean(html, new ObjectName("Adaptor:name=html,port=8082"));
  13.    log.info("Registering HierarchyDynamicMBean instance.");
  14.    HierarchyDynamicMBean hdm = new HierarchyDynamicMBean();
  15.    server.registerMBean(hdm, new ObjectName("log4j:hiearchy=default"));
  16.   } catch(JMException e) {
  17.    log.error("Problem while registering MBeans instances.", e);
  18.    return;
  19.   } catch(RuntimeException e) {
  20.    log.error("Problem while registering MBeans instances.", e);
  21.    return;
  22.   }
  23.   startServer(html);
  24.  }
  25. }

代码示例来源：origin: log4j/log4j

  1. void registerAppenderMBean(Appender appender) {
  2.  String name = getAppenderName(appender);
  3.  cat.debug("Adding AppenderMBean for appender named "+name);
  4.  ObjectName objectName = null;
  5.  try {
  6.   AppenderDynamicMBean appenderMBean = new AppenderDynamicMBean(appender);
  7.   objectName = new ObjectName("log4j", "appender", name);
  8.   if (!server.isRegistered(objectName)) {
  9.    registerMBean(appenderMBean, objectName);
  10.    dAttributes.add(new MBeanAttributeInfo("appender=" + name, "javax.management.ObjectName",
  11.        "The " + name + " appender.", true, true, false));
  12.   }
  13.  } catch(JMException e) {
  14.   cat.error("Could not add appenderMBean for ["+name+"].", e);
  15.  } catch(java.beans.IntrospectionException e) {
  16.   cat.error("Could not add appenderMBean for ["+name+"].", e);
  17.  } catch(RuntimeException e) {
  18.   cat.error("Could not add appenderMBean for ["+name+"].", e);
  19.  }
  20. }

代码示例来源：origin: apache/storm

  1. public MetricsCollectorConfig(String topoName, Map<String, Object> topoConfig) {
  2.     this.topoConfig = topoConfig;
  3.     String labelStr = (String) topoConfig.get("benchmark.label");
  4.     this.name = topoName;
  5.     if (labelStr == null) {
  6.       LOG.warn("'benchmark.label' not found in config. Defaulting to topology name");
  7.       labelStr = this.name;
  8.     }
  9.     this.label = labelStr;
  10.   }
  11. } // MetricsCollectorConfig

代码示例来源：origin: knightliao/disconf

  1. public void process(WatchedEvent event) {
  2.     // lets either become the leader or watch the new/updated node
  3.     LOG.debug("Watcher fired on path: " + event.getPath() + " state: " +
  4.            event.getState() + " type " + event.getType());
  5.     try {
  6.       lock();
  7.     } catch (Exception e) {
  8.       LOG.warn("Failed to acquire lock: " + e, e);
  9.     }
  10.   }
  11. }

代码示例来源：origin: log4j/log4j

  1. LoggerRepository configureHierarchy(InetAddress inetAddress) {
  2.  cat.info("Locating configuration file for "+inetAddress);
  3.  // We assume that the toSting method of InetAddress returns is in
  4.  // the format hostname/d1.d2.d3.d4 e.g. torino/192.168.1.1
  5.  String s = inetAddress.toString();
  6.  int i = s.indexOf("/");
  7.  if(i == -1) {
  8.   cat.warn("Could not parse the inetAddress ["+inetAddress+
  9.      "]. Using default hierarchy.");
  10.   return genericHierarchy();
  11.  } else {
  12.   String key = s.substring(0, i);
  13.   File configFile = new File(dir, key+CONFIG_FILE_EXT);
  14.   if(configFile.exists()) {
  15.  Hierarchy h = new Hierarchy(new RootLogger(Level.DEBUG));
  16.  hierarchyMap.put(inetAddress, h);
  17.  new PropertyConfigurator().doConfigure(configFile.getAbsolutePath(), h);
  18.  return h;
  19.   } else {
  20.  cat.warn("Could not find config file ["+configFile+"].");
  21.  return genericHierarchy();
  22.   }
  23.  }
  24. }

代码示例来源：origin: alibaba/druid

  1. @Override
  2. public void setConnectionLoggerName(String connectionLoggerName) {
  3.   this.connectionLoggerName = connectionLoggerName;
  4.   connectionLogger = Logger.getLogger(connectionLoggerName);
  5. }

代码示例来源：origin: log4j/log4j

  1. void addAppender(String appenderClass, String appenderName) {
  2.  cat.debug("addAppender called with "+appenderClass+", "+appenderName);
  3.  Appender appender = (Appender)
  4.    OptionConverter.instantiateByClassName(appenderClass,
  5.             org.apache.log4j.Appender.class,
  6.             null);
  7.  appender.setName(appenderName);
  8.  logger.addAppender(appender);
  9.  //appenderMBeanRegistration();
  10. }

代码示例来源：origin: apache/flink

  1. public static void addTestAppender(Class target, Level level) {
  2.   testAppender = new TestAppender();
  3.   testAppender.setThreshold(level);
  4.   org.apache.log4j.Logger lg = org.apache.log4j.Logger.getLogger(target);
  5.   lg.setLevel(level);
  6.   lg.addAppender(testAppender);
  7.   //org.apache.log4j.Logger.getRootLogger().addAppender(testAppender);
  8. }

代码示例来源：origin: apache/hbase

  1. public static void main(String[] argv) throws Exception {
  2.   // Silence the usual noise. This is probably fragile...
  3.   Logger logger = Logger.getLogger("org.apache.hadoop.hbase");
  4.   if (logger != null) {
  5.    logger.setLevel(Level.WARN);
  6.   }
  7.   System.exit(ToolRunner.run(
  8.    HBaseConfiguration.create(), new MapreduceDependencyClasspathTool(), argv));
  9.  }
  10. }

代码示例来源：origin: apache/ignite

  1. /**
  2.  * Sets level for internal log4j implementation.
  3.  *
  4.  * @param level Log level to set.
  5.  */
  6. public void setLevel(Level level) {
  7.   impl.setLevel(level);
  8. }

代码示例来源：origin: apache/hbase

  1. @Test
  2.  public void testAppenderDefined() {
  3.   HttpRequestLogAppender requestLogAppender = new HttpRequestLogAppender();
  4.   requestLogAppender.setName("testrequestlog");
  5.   Logger.getLogger("http.requests.test").addAppender(requestLogAppender);
  6.   RequestLog requestLog = HttpRequestLog.getRequestLog("test");
  7.   Logger.getLogger("http.requests.test").removeAppender(requestLogAppender);
  8.   assertNotNull("RequestLog should not be null", requestLog);
  9.   assertEquals("Class mismatch", NCSARequestLog.class, requestLog.getClass());
  10.  }
  11. }

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