log4j appender自定义_log4j routingappender_fileappender log4j(39)

38if (reconnectionDelay > 0) {

39fireConnector();

40} else {

41errorHandler

42.error("Detected problem with connection, not reconnecting.",

43e, ErrorCode.GENERIC_FAILURE);

44}

45}

46}

47 }

SocketNode类

Log4J为日志服务器的实现提供了SocketNode类，它接收客户端的链接，并根据配置打印到相关的Appender中。

1 public class SocketNode implements Runnable {

2Socket socket;

3LoggerRepository hierarchy;

4ObjectInputStream ois;

5

6public SocketNode(Socket socket, LoggerRepository hierarchy) {

7this.socket = socket;

8this.hierarchy = hierarchy;

9try {

10ois = new ObjectInputStream(new BufferedInputStream(

11socket.getInputStream()));

12} catch () {

13

14}

15}

16

17public void run() {

18LoggingEvent event;

19Logger remoteLogger;

20try {

21if (ois != null) {

22while (true) {

23event = (LoggingEvent) ois.readObject();

24remoteLogger = hierarchy.getLogger(event.getLoggerName());

25if (event.getLevel().isGreaterOrEqual(

26remoteLogger.getEffectiveLevel())) {

27remoteLogger.callAppenders(event);

28}

29}

30}

31} catch () {

32

33} finally {

34if (ois != null) {

35try {

36ois.close();

37} catch (Exception e) {

38logger.info("Could not close connection.", e);

39}

40}

41if (socket != null) {

42try {

43socket.close();

44} catch (InterruptedIOException e) {

45Thread.currentThread().interrupt();

46} catch (IOException ex) {

47}

48}

49}

50}

51 }

事实上，Log4J提供了两个日志服务器的实现类：SimpleSocketServer和SocketServer。他们都会接收客户端的连接，为每个客户端链接创建一个SocketNode实例，并根据指定的配置文件打印日志消息。它们的不同在于SimpleSocketServer同时支持xml和properties配置文件，而SocketServer只支持properties配置文件；另外，SocketServer支持不同客户端使用不同的配置文件（以客户端主机名作为选择配置文件的方式），而SimpleSocketServer不支持。

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