scalatra_LifeCycle

scalatra是如何启动的

class ScalatraListener extends ServletContextListener {

import org.scalatra.servlet.ScalatraListener._

private[this] val logger: Logger = Logger[this.type]

private[this] var cycle: LifeCycle = _

private[this] var servletContext: ServletContext = _override def contextInitialized(sce: ServletContextEvent): Unit = {

override def contextInitialized(sce: ServletContextEvent): Unit 
  try {
    //contextInitialized 后赋值给servletContext
    configureServletContext(sce)
    configureCycleClass(Thread.currentThread.getContextClassLoader)
  } catch {
    case e: Throwable =>
      logger.error("Failed to initialize scalatra application at " + sce.getServletContext.getContextPath, e)
      throw e
  }
}

def contextDestroyed(sce: ServletContextEvent): Unit = {
  if (cycle != null) {
    logger.info("Destroying life cycle class: %s".format(cycle.getClass.getName))
    cycle.destroy(servletContext)
  }
}

protected def configureExecutionContext(sce: ServletContextEvent): Unit = {
}

//寻找LifeCycle
protected def probeForCycleClass(classLoader: ClassLoader): (String, LifeCycle) = {

}

protected def configureServletContext(sce: ServletContextEvent): Unit = {
  //定义servletContext 从sce获取
  servletContext = sce.getServletContext
}

protected def configureCycleClass(classLoader: ClassLoader): Unit = {

}
}

object ScalatraListener {

// DO NOT RENAME THIS CLASS NAME AS IT BREAKS THE ENTIRE WORLD
// TOGETHER WITH THE WORLD IT WILL BREAK ALL EXISTING SCALATRA APPS
// RENAMING THIS CLASS WILL RESULT IN GETTING SHOT, IF YOU SURVIVE YOU WILL BE SHOT AGAIN
val DefaultLifeCycle: String = "ScalatraBootstrap"
val OldDefaultLifeCycle: String = "Scalatra"
val LifeCycleKey: String = "org.scalatra.LifeCycle"

}