java - 独立登录多个文件夹中的多个文件-log4j JAVA

Question

我正在开发一个多线程应用程序，我想在其中使用 log4j 在不同位置进行日志记录。

场景:

Folder1 ---> log1.log
                    log2.log
                    log3.log

Folder2 ---> log1.log
                    log2.log
                    log3.log

我希望我的记录器能够独立登录文件。

到目前为止，我已经创建了 3 个 RollingFileAppenders ，对应于文件夹 1 的 3 个记录器，但问题是“我将拥有大约 100 个文件夹，我不想为它们编写 Appender 和记录器”在我的 log4j.xml 文件中”。

<appender name="logfile1" class="org.apache.log4j.RollingFileAppender">
    <param name="File" value="Folder1/log1.log" />
    <param name="Append" value="true" />
    <param name="MaxFileSize" value="10MB" />
    <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern" value="%m%n" />
    </layout>
</appender>

<appender name="logfile2" class="org.apache.log4j.RollingFileAppender">
    <param name="File" value="Folder1/log2.log" />
    <param name="Append" value="true" />
    <param name="MaxFileSize" value="10MB" />
    <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern" value="%m%n" />
    </layout>
</appender>

<appender name="logfile3" class="org.apache.log4j.RollingFileAppender">
    <param name="File" value="Folder1/log3.log" />
    <param name="Append" value="true" />
    <param name="MaxFileSize" value="10MB" />
    <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern" value="%m%n" />
    </layout>
</appender>

<logger name="Logger1" additivity="false">
    <level value="INFO" />
    <appender-ref ref="logfile1" />
</logger>

<logger name="Logger2" additivity="false">
    <level value="INFO" />
    <appender-ref ref="logfile2" />
</logger>

<logger name="Logger3" additivity="false">
    <level value="INFO" />
    <appender-ref ref="logfile3" />
</logger>

文件夹将在运行时创建

我的方法:
我想根据我的文件夹名称实例化我的记录器并将它们保存在 HashMap 中，例如

HashMap<FolderName, HashMap<LoggerType, LoggerObject>>

FolderName: String 
LoggerType: it will be an Enum of log1, log2 and log3 
LoggerObject: It will a log4j Logger object

因此，我将提供一种方法来获取 LoggerObject，例如

public Logger getLoggerObject(String folderName, LoggerType loggerType){
     \\logic
     return loggerObject;
}

Logging.getLoggerObject("Folder1", LoggerType.log1).info("I am writing to log1.log file in Folder1");

问题:
1. 我无法在运行时配置 LoggerObjects。帮我做那件事!
2. 如何为多个文件夹位置和多个日志文件配置记录器？

Answer 1

既然您说您愿意切换到 log4j2，我建议您这样做，然后使用 RoutingAppender类似于 log4j2 FAQ regarding dynamically writing to separate log files 中的示例.

下面是一些示例代码，说明如何使用 ThreadContext 动态更改文件夹和日志文件:

首先我们创建 2 个实现 Runnable 的类:

package runners;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.ThreadContext;

public class Runner1 implements Runnable{
    private static final Logger log = LogManager.getLogger();

    public void run() {
        //Set up the context before getting logger
        ThreadContext.put("logFolder", "Folder1");
        ThreadContext.put("logFileName", "log1");

        //Generate some logs
        log.info("here's the first thread");

        //Wait a while so that threads interleave
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        //Generate more logs
        log.debug("some debug in first thread");
        log.info("finishing first thread");

    }
}

和

package runners;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.ThreadContext;

public class Runner2 implements Runnable{
    private static final Logger log = LogManager.getLogger();

    public void run() {
        //Set up the context before getting logger
        ThreadContext.put("logFolder", "Folder2");
        ThreadContext.put("logFileName", "log2");

        //Generate some logs
        log.info("here's the second thread");
        log.debug("some debug in second thread");

    }
}

现在是一个用于创建和启动 2 个线程的基本 Controller 类:

package runners;

public class Controller {

    public static void main(String[] args) {
        Thread t1 = new Thread(new Runner1());
        Thread t2 = new Thread(new Runner2());
        t1.start();
        t2.start();
    }

}

最后我们需要配置log4j2:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
    <Appenders>
        <Routing name="MyRoutingAppender">
            <Routes pattern="$${ctx:logFolder}-$${ctx:logFileName}">
                <Route>
                    <File fileName="logs/${ctx:logFolder}/${ctx:logFileName}.log"
                        name="appender-${ctx:logFolder}-${ctx:logFileName}">
                        <PatternLayout>
                            <Pattern>[%date{ISO8601}][%-5level][%t] %m%n</Pattern>
                        </PatternLayout>
                    </File>
                </Route>
            </Routes>
        </Routing>
        <Console name="STDOUT" target="SYSTEM_OUT">
            <PatternLayout pattern="[%date{ISO8601}][%-5level][%t] %m%n" />
        </Console>

    </Appenders>
    <Loggers>
        <Logger name="runners" level="TRACE" additivity="false">
            <AppenderRef ref="STDOUT" />
            <AppenderRef ref="MyRoutingAppender" />
        </Logger>
        <Root level="WARN">
            <AppenderRef ref="STDOUT" />
        </Root>
    </Loggers>
</Configuration>

运行Controller后，您将看到生成了两个文件夹，每个文件夹中都有一个文件:

第一个线程的日志位于folder1 > log1中，第二个线程的日志位于folder2 > log2中

请注意，我使用了基本文件附加程序，但您可以在路由附加程序中交换不同的附加程序以满足您的需求。

希望这有助于您入门。