idea 查看scala源代码

使用idea编写spark程序,想要查看源代码,点进去是compiled code

 

private[sql] def this(sc : org.apache.spark.SparkContext) = { /* compiled code */ }
  def version : scala.Predef.String = { /* compiled code */ }

网上很多方法都是下载java 反编译工具,如java bytecode compiler。
按照方法试了,倒是java类的class点进去能够看到反编译的代码,scala的class点进去依然没有反编译。可能是idea版本问题。

试了几次遂放弃。

因为即使是反编译成功了,依然不是我想要的结果。反统的代码毕竟不是源码,也没有注释。
所以为何不利用maven下载源码与注释呢。

可在全局配置里勾选source和doc两项,maven在引入依赖时自动下载源码和注释。

当然更好的方案是,不勾选此两项,仅在需要查看源码的时候,去下载。

好了,点击查看spark源码,这是我想要的效果:

/**
   * Activate the stream and then wrap a callout to runActivatedStream, handling start and stop.
   *
   * Note that this method ensures that [[QueryStartedEvent]] and [[QueryTerminatedEvent]] are
   * posted such that listeners are guaranteed to get a start event before a termination.
   * Furthermore, this method also ensures that [[QueryStartedEvent]] event is posted before the
   * `start()` method returns.
   */
  private def runStream(): Unit = {
    try {
      sparkSession.sparkContext.setJobGroup(runId.toString, getBatchDescriptionString,
        interruptOnCancel = true)
      sparkSession.sparkContext.setLocalProperty(StreamExecution.QUERY_ID_KEY, id.toString)
      if (sparkSession.sessionState.conf.streamingMetricsEnabled) {
        sparkSession.sparkContext.env.metricsSystem.registerSource(streamMetrics)
      }

      // `postEvent` does not throw non fatal exception.
      val startTimestamp = triggerClock.getTimeMillis()
      postEvent(new QueryStartedEvent(id, runId, name, formatTimestamp(startTimestamp)))
posted @ 2021-08-31 11:52  是奉壹呀  阅读(990)  评论(0编辑  收藏  举报