完成"Scala记录"例子 [英] Complete "Scala Logging" Example

问题描述

我正在尝试使用Typesafe的 Scala日志记录，但无法获取它来打印任何调试消息.我希望Scala Logging可以将调试消息打印到默认屏幕，但是它不起作用.一个完整的示例将非常有帮助，或者具体建议更改内容也将非常有用.我使用Scala 2.11.这是我所做的:

I'm trying to use Typesafe's Scala Logging but couldn't get it to print any debug message. I expect Scala Logging to print debug message to the default screen but it doesn't work. A complete example would be very helpful or specific advise what to change would be great too. I use Scala 2.11. Here is what I did:

1. 我将依赖项添加到build.sbt:

1. I added the dependency to build.sbt:

libraryDependencies += "com.typesafe.scala-logging" %% "scala-logging" % "3.1.0"

即使我不确定是否需要这样做，我还是添加了以下行，但没有任何区别:

Even though I'm not sure if this is required, I added the following line but it didn't do any difference:

libraryDependencies += "com.typesafe.scala-logging" % "scala-logging-slf4j_2.11" % "2.1.2"

这是我班级的基本样子:

This is how my class looks like basically:

import com.typesafe.scalalogging._

class MyClass extends LazyLogging {
  // ...
  logger.debug("Here goes my debug message.")
  // ...
}

我发现了文件./src/main/resources/logback.xml，但不确定是哪个模块安装的，以及是否相关.我将日志级别更改为调试"，没有任何效果.

I discovered the file ./src/main/resources/logback.xml but am not sure which module installed it and if its relevant. I changed the log level to "debug" without effect.

<configuration>

  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <!-- encoders are assigned the type
         ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
    <encoder>
      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
    </encoder>
  </appender>

  <logger name="scala.slick" level="DEBUG"/>

  <root level="debug">
    <appender-ref ref="STDOUT" />
  </root>
</configuration>

推荐答案

IIRC，它将默认打印从信息级别开始的消息.要更改此设置，您需要将logback.xml文件放入src/main/resources(或使用-Dlogback.configurationFile=/path/to/config.xml JVM参数).请参阅Logback文档中的配置一章.

IIRC it'll print messages starting from info level by default. To change this, you need to put logback.xml file into src/main/resources (or use -Dlogback.configurationFile=/path/to/config.xml JVM parameter). See Configuration chapter in Logback documentation.

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