Github user onkarshedge commented on the issue: https://github.com/apache/zeppelin/pull/1231 @khalidhuseynov thanks for helping. To actually see `TorrentSocket` in action I have to create a`WebSocketCreator` and a `Servlet`, then add this to jetty server , [at this line](https://github.com/apache/zeppelin/blob/6f867ceb0c2b93ecca3be8a16c155547182eb0dc/zeppelin-server/src/main/java/org/apache/zeppelin/server/ZeppelinServer.java#L223) ```java webApp.addServlet(new ServletHolder("ws-events",new TorrentServlet()),"/download"); ``` So then should it be like this ... ```java public class BittorrentNotebookRepo extends VFSNotebookRepo implements TorrentEngineListener, WebSocketCreator { @Override public Object createWebSocket(ServletUpgradeRequest servletUpgradeRequest, ServletUpgradeResponse servletUpgradeResponse) { return new TorrentSocket(this); } } ``` And the `TorrentServlet` class ```java public class TorrentServlet extends WebSocketServlet { @Override public void configure(WebSocketServletFactory webSocketServletFactory) { webSocketServletFactory.setCreator(new BittorrentNotebookRepo()); } } ``` Here is the problem as I cannot instantiate the BittorrentNotebookRepo here , it requires `conf` parameter. Also the NotebookRepos' are instantiated in `NotebookRepoSync`.
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