private def initializePlugins()

in kernel/src/main/scala/org/apache/toree/boot/layer/ComponentInitialization.scala [204:232]


  private def initializePlugins(
    config: Config,
    pluginManager: PluginManager
  ) = {
    val magicUrlArray = config.getStringList("magic_urls").asScala
      .map(s => new java.net.URL(s)).toArray

    if (magicUrlArray.isEmpty)
      logger.warn("No external magics provided to PluginManager!")
    else
      logger.info("Using magics from the following locations: " +
        magicUrlArray.map(_.getPath).mkString(","))

    // Load internal plugins under kernel module
    logger.debug("Loading internal plugins")
    val internalPlugins = pluginManager.initialize()
    logger.info(internalPlugins.size + " internal plugins loaded")

    // Load external plugins if provided
    logger.debug("Loading external plugins")
    val externalPlugins = if (magicUrlArray.nonEmpty) {
      val externalPlugins = pluginManager.loadPlugins(
        magicUrlArray.map(_.getFile).map(new File(_)): _*
      )
      pluginManager.initializePlugins(externalPlugins)
      externalPlugins
    } else Nil
    logger.info(externalPlugins.size + " external plugins loaded")
  }