Java Logback 将不同的消息记录到两个文件中
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Logback to log different messages to two files
提问by Aly
I am using logback/slf4j to do my logging. I want to parse my log file to analyze some data, so instead of parsing a great big file (mostly consisting of debug statements) I want to have two logger instances which each log to a separate file; one for analytics and one for all purpose logging. Does anyone know if this is possible with Logback, or any other logger for that matter?
我正在使用 logback/slf4j 进行日志记录。我想解析我的日志文件来分析一些数据，所以我想要有两个记录器实例，每个记录到一个单独的文件，而不是解析一个很大的文件（主要由调试语句组成）；一种用于分析，一种用于所有用途的日志记录。有谁知道这是否可以通过 Logback 或任何其他记录器实现？
采纳答案by ig0774
It's very possible to do something like this in logback. Here's an example configuration:
在 logback 中很可能做这样的事情。这是一个示例配置：
<?xml version="1.0"?>
<configuration>
<appender name="FILE" class="ch.qos.logback.core.FileAppender">
<file>logfile.log</file>
<append>true</append>
<encoder>
<pattern>%-4relative [%thread] %-5level %logger{35} - %msg %n</pattern>
</encoder>
</appender>
<appender name="ANALYTICS-FILE" class="ch.qos.logback.core.FileAppender">
<file>analytics.log</file>
<append>true</append>
<encoder>
<pattern>%-4relative [%thread] %-5level %logger{35} - %msg %n</pattern>
</encoder>
</appender>
<!-- additivity=false ensures analytics data only goes to the analytics log -->
<logger name="analytics" level="DEBUG" additivity="false">
<appender-ref ref="ANALYTICS-FILE"/>
</logger>
<root>
<appender-ref ref="FILE"/>
</root>
</configuration>
Then you'd setup two separate loggers, one for everything and one to log analytics data like so:
然后，您将设置两个单独的记录器，一个用于所有内容，另一个用于记录分析数据，如下所示：
Logger analytics = LoggerFactory.getLogger("analytics");
回答by panser
in my case I wanted to leave class names as log name
就我而言，我想将类名保留为日志名
private static final Logger log = LoggerFactory.getLogger(ScheduledPost.class);
and as I had few such classes, so my logback.xml
由于我很少有这样的课程，所以我的 logback.xml
<!--additivity=false ensures this log data only goes to the this log, and no one more -->
<logger name="xxx.xxx.xxx.ScheduledPost" level="DEBUG" additivity="false">
<appender-ref ref="ASYNC_SCHEDULE_LOG_FILE"/>
</logger>
<logger name="xxx.xxx.xxx.GcmPost" level="DEBUG" additivity="false">
<appender-ref ref="ASYNC_SCHEDULE_LOG_FILE"/>
</logger>
<logger name="xxx.xxx.xxx.PushUtils" level="DEBUG" additivity="false">
<appender-ref ref="ASYNC_SCHEDULE_LOG_FILE"/>
</logger>
回答by AraT
You can have as many loggers as you wish. But, it's better you have one for each package that you need to log differently. Then all the classes in that package and its sub-packages will get the that specific logger. They all can share the root logger and send their log data to root logger appender using additivity="true". Here's an example:
您可以拥有任意数量的记录器。但是，最好为需要以不同方式记录的每个包都准备一个。然后该包及其子包中的所有类将获得该特定记录器。他们都可以共享根记录器并使用 additivity="true" 将他们的日志数据发送到根记录器 appender。下面是一个例子：
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<property name="pattern" value="%date{HH:mm:ss.SSS} %-5p %logger{36}
%X{akkaSource} [%file:%line] - %m%n" />
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%date{HH:mm:ss.SSS} %-5p %logger{36} %X{akkaSource} [%file:%line] - %m%n</pattern>
</encoder>
</appender>
<appender name="abc" class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>${catalina.base}/logs/worker.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${catalina.base}/logs/worker-%d{yyyy-MM-dd_HH}.log</fileNamePattern>
<maxHistory>360</maxHistory>
</rollingPolicy>
<encoder>
<pattern>${pattern}</pattern>
</encoder>
</appender>
<appender name="xyz" class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>${catalina.base}/logs/transformer.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${catalina.base}/logs/transformer-%d{yyyy-MM-dd_HH}.log</fileNamePattern>
<maxHistory>360</maxHistory>
</rollingPolicy>
<encoder>
<pattern>${pattern}</pattern>
</encoder>
</appender>
<logger name="com.xxx.yyy.zzz" level="INFO" additivity="true">
<appender-ref ref="xyz"/>
</logger>
<logger name="com.aaa.bbb.ccc" level="INFO" additivity="true">
<appender-ref ref="abc"/>
</logger>
<root>
<level value="INFO" />
<appender-ref ref="STDOUT" />
</root>
