我们的Akka项目依赖于其他一些非akka代码。从此代码中,我们获取记录器的方法是调用org.slf4j.LoggerFactory.getLogger(ThisClass.class)
我想获得事件发生的时间和地点的实时和真实线程,包括在日志打印中,因此我获取akkaTimestamp和sourceThread的值,如下所示:
log4j.appender.console.layout.ConversionPattern=[%-5p] [%X{akkaTimestamp}] [%X{sourceThread}] %c{5}: %m%n
问题在于从MDC提取的这些值在从非Akka记录器发送的打印物中不可用。
他们说Here
最好在应用程序的非Akka部分中使用sourceThread MDC值,以使此属性在日志中始终可用。
但是他们从不说/
最佳答案
正如Konrad所说,它并不那么复杂。这对我有用:
import akka.util.Helpers
import ch.qos.logback.core.ConsoleAppender
import org.slf4j.MDC
/**
* Decorates MDC with same keys as Akka in
* <a href="https://github.com/akka/akka/blob/master/akka-slf4j/src/main/scala/akka/event/slf4j/Slf4jLogger.scala#L89">Slf4jLogger</a>
* So that logging messages dispatched from non-akka threads has same data.
*/
class AkkaCompatibleConsoleAppender[E] extends ConsoleAppender[E] {
val mdcThreadAttributeName = "sourceThread"
val mdcAkkaTimestamp = "akkaTimestamp"
override def append(eventObject: E): Unit = {
try {
MDC.put(mdcAkkaTimestamp, Helpers.currentTimeMillisToUTCString(System.currentTimeMillis()))
MDC.put(mdcThreadAttributeName, Thread.currentThread().getName)
super.append(eventObject)
} finally {
MDC.remove(mdcAkkaTimestamp)
MDC.remove(mdcThreadAttributeName)
}
}
}
然后在logback.xml中:
<appender name="STDOUT" class="agordo.server.AkkaCompatibleConsoleAppender">
<encoder>
<pattern>%X{akkaTimestamp} %-5level %logger{36} %X{sourceThread} %X{akkaSource} - %msg%n</pattern>
</encoder>
</appender>