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Re: [jetty-users] Jetty9 WebSocket Client - SessionFactory.createSession causes java.lang.NullPointerException

I need to write an update to that article.

--
Joakim Erdfelt <joakim@xxxxxxxxxxx>
Expert advice, services and support from from the Jetty & CometD experts


On Wed, Jan 15, 2014 at 2:05 PM, Ken OKABE <kenokabe@xxxxxxxxx> wrote:
Hi Joakim Erdfelt,

Thanks to your advice, I understand.

Probably, I can get through this issue since every factor seems
well-defined to me by your answer.

During this research, I've read your article:

http://webtide.intalio.com/2012/10/jetty-9-updated-websocket-api/


Regards,

Ken



On Thu, Jan 16, 2014 at 5:15 AM, Joakim Erdfelt <joakim@xxxxxxxxxxx> wrote:
> see a simple example at
>
> http://git.eclipse.org/c/jetty/org.eclipse.jetty.project.git/tree/jetty-websocket/websocket-client/src/test/java/examples?id=jetty-9.1.1.v20140108
>
> There's no need to be mucking about with WebSocketSessionFactory,
> EventDriver, or LogicalConnection.
> Just keep it simple, use the socket you pass in as your communications
> channel.
> The Socket is configured by you to receive messages, and you use the session
> (obtained during socket open) to get information about the connection.
> Use the session.getRemote() to send messages.
>
>
> --
> Joakim Erdfelt <joakim@xxxxxxxxxxx>
> webtide.com - intalio.com/jetty
> Expert advice, services and support from from the Jetty & CometD experts
> eclipse.org/jetty - cometd.org
>
>
> On Wed, Jan 15, 2014 at 12:54 PM, Ken OKABE <kenokabe@xxxxxxxxx> wrote:
>>
>> Hi, I'm new to Jerry, and trying to implement WebSocket Client on Jetty9.
>>
>> I saw an example on Jetty8.
>>
>> org.eclipse.jetty.websocket Class WebSocketClient
>>
>>
>> http://archive.eclipse.org/jetty/8.0.0.v20110901/apidocs/org/eclipse/jetty/websocket/WebSocketClient.html
>>
>> to create a new instance of WebSocketClient is :
>> //=====================================================
>>    WebSocketClientFactory factory = new WebSocketClientFactory();
>>    factory.start();
>>
>>    WebSocketClient client = factory.newWebSocketClient();
>>    // Configure the client
>>
>>    WebSocket.Connection connection = client.open(new
>> URI("ws://127.0.0.1:8080/"), new WebSocket.OnTextMessage()
>>    {
>>      public void onOpen(Connection connection)
>>      {
>>        // open notification
>>      }
>>
>>      public void onClose(int closeCode, String message)
>>      {
>>        // close notification
>>      }
>>
>>      public void onMessage(String data)
>>      {
>>        // handle incoming message
>>      }
>>    }).get(5, TimeUnit.SECONDS);
>>
>>    connection.sendMessage("Hello World");
>> //===========================================================
>>
>> However, I've never seen a document for Jetty9 for this.
>>
>> So far, referring to
>>
>> http://download.eclipse.org/jetty/9.1.0.v20131115/apidocs/org/eclipse/jetty/websocket/common/SessionFactory.html#createSession%28java.net.URI,%20org.eclipse.jetty.websocket.common.events.EventDriver,%20org.eclipse.jetty.websocket.common.LogicalConnection%29
>>
>> //----------------------------------------------
>> WebSocketSession createSession(URI requestURI,
>>                              EventDriver websocket,
>>                              LogicalConnection connection)
>> //----------------------------------------------
>>
>>  I've tried
>>
>> //===========================================================
>>          try
>>             {
>>                 WebSocketSession session = factory.createSession(uri,
>> eventDriver, connection);
>>                 RemoteEndpoint ep = session.getRemote();
>>             }
>>          catch (Exception ex)
>>             {
>>                 System.out.println("=ERROR= " + ex);
>>                 //=ERROR= java.lang.NullPointerException
>>             }
>>
>>         private EventDriver eventDriver = new EventDriver()
>>         {
>>             @Override
>>             public WebSocketPolicy getPolicy()
>>             {
>>                 return null;
>>             }
>>
>>             //......................................
>>
>>             @Override
>>             public void incomingFrame(Frame frame)
>>             {
>>
>>             }
>>         };
>>
>>         private LogicalConnection connection = new LogicalConnection()
>>         {
>>             @Override
>>             public void close()
>>             {
>>
>>             }
>>
>>             //...............................
>>
>>
>>             @Override
>>             public void resume()
>>             {
>>
>>             }
>>         };
>> //===========================================================
>>
>> but I've encounter  java.lang.NullPointerException
>>
>> How do we implement Jetty9 WebSocket Client ??
>>
>> Thanks for your advise.
>>
>> Ken
>> _______________________________________________
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>> jetty-users@xxxxxxxxxxx
>> https://dev.eclipse.org/mailman/listinfo/jetty-users
>
>
>
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