如何在不同的日志文件中记录多个线程？ [英] How to log multiple threads in different log files?

问题描述

我有一个JAVA类，它启动具有唯一ID的各种线程。
每个线程都应该登录一个以ID.log命名的唯一日志文件。

I have a JAVA class that starts various threads that have unique IDs. Each thread should log into a unique log file, named after the ID.log.

因为我只在运行时获得唯一ID，所以我必须配置Log4J以编程方式：

Because I only get the unique ID at runtime, I have to configure Log4J programatically:

// Get the jobID
myJobID = aJobID;
// Initialize the logger
myLogger = Logger.getLogger(myJobID);
FileAppender myFileAppender;
try
{
    myFileAppender = new FileAppender(new SimpleLayout(), myJobID + ".log", false);
    BasicConfigurator.resetConfiguration();
    BasicConfigurator.configure(myFileAppender);
} catch (IOException e1) {
// TODO Auto-generated catch block
    e1.printStackTrace();
}

现在按顺序启动作业可以正常工作 - 但是当我启动2个线程时（同一类）同时创建两个日志，但日志混合起来：第二个线程记录到第一个和第二个日志。

Now this works fine if I start jobs sequentially - but when I start 2 threads (of the same class) simultaneously, both logs are created but the logs are mixed up: The second thread logs into the first as well as the second log.

怎么可能我确保每个实例都是唯一的？
我已经尝试为每个记录器实例提供一个唯一的名称，但它没有改变任何东西。

How could I make sure that each instance is unique ? I already tried to give a unique name to each logger instance, but it did not change anything.

推荐答案

Logback有一个特殊的appender称为 SiftingAppender ，为问题类型提供了一个非常好的解决方案你形容。 SiftingAppender可用于根据任何运行时属性（包括线程ID）分离（或筛选）日志记录。

Logback has a special appender called SiftingAppender which provides a very nice solution to the type of problems you describe. A SiftingAppender can be used to separate (or sift) logging according to any runtime attribute, including thread id.

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