Question

我正在使用带有groovy配置的logback 1.1.10。我最近发现shutdownHook preference但我还没有找到使用groovy配置启用它的方法。这可能吗？还是缺少一个功能？

Answer 1

在v1.1.3中添加了Logback的shutdownHook，可以使用Groovy进行配置。 docs对此问题有点了解，xml->groovy translator忽略了shutdownHook，但我已通过Groovy配置验证了包含关闭挂钩，如下所示：

  import ch.qos.logback.classic.AsyncAppender
  import ch.qos.logback.classic.PatternLayout
  import ch.qos.logback.classic.encoder.PatternLayoutEncoder
  import ch.qos.logback.core.ConsoleAppender
  import static ch.qos.logback.classic.Level.INFO

  scan("30 seconds")

  statusListener(OnConsoleStatusListener)

  def shutdownHook() {
      def shutdownHook = new ch.qos.logback.core.hook.DelayingShutdownHook();
      shutdownHook.setContext(context);

      def Thread hookThread = new Thread(shutdownHook, "Logback shutdown hook [" + context.name + "]");
      context.putObject("SHUTDOWN_HOOK", hookThread);
      Runtime.getRuntime().addShutdownHook(hookThread);
  }

  shutdownHook();

  appender("Console-Appender", ConsoleAppender) {
      encoder(PatternLayoutEncoder) {
          pattern = "%d|%-5p|%t|%msg%n"
      }
  }

  logger("com", INFO, ["Console-Appender"], false)

  root(INFO, ["Console-Appender"])

通过运行使用logback的Java进程确认了这一点，使用-Dlogback.configurationFile显式指向上述配置，结果输出清楚地显示正在使用的关闭挂钩：

08:47:47,705 |-INFO in ch.qos.logback.classic.gaffer.ConfigurationDelegate@7ce97ee5 - Setting ReconfigureOnChangeTask scanning period to 30 seconds
08:47:47,728 |-INFO in ch.qos.logback.classic.gaffer.ConfigurationDelegate@7ce97ee5 - Added status listener of type [ch.qos.logback.core.status.OnConsoleStatusListener]
08:47:47,750 |-INFO in ch.qos.logback.classic.gaffer.ConfigurationDelegate@7ce97ee5 - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
08:47:47,752 |-INFO in ch.qos.logback.classic.gaffer.ConfigurationDelegate@7ce97ee5 - Naming appender as [Console-Appender]
08:47:47,902 |-INFO in ch.qos.logback.classic.gaffer.ConfigurationDelegate@7ce97ee5 - Setting level of logger [com] to INFO
08:47:47,911 |-INFO in ch.qos.logback.classic.gaffer.ConfigurationDelegate@7ce97ee5 - Attaching appender named [Console-Appender] to Logger[com]
08:47:47,915 |-INFO in ch.qos.logback.classic.gaffer.ConfigurationDelegate@7ce97ee5 - Setting level of logger [ROOT] to INFO
08:47:47,915 |-INFO in ch.qos.logback.classic.gaffer.ConfigurationDelegate@7ce97ee5 - Attaching appender named [Console-Appender] to Logger[ROOT]
2017-08-01 08:47:48,072|INFO |main|yippee!
Disconnected from the target VM, address: '127.0.0.1:57421', transport: 'socket'
08:47:48,131 |-INFO in ch.qos.logback.core.hook.DelayingShutdownHook@6765f751 - Sleeping for 0 milliseconds
08:47:48,131 |-INFO in ch.qos.logback.core.hook.DelayingShutdownHook@6765f751 - Logback context being closed via shutdown hook

Logback：使用Groovy配置启用shutdownHook

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