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Re: [jetty-users] Jetty9 WebSocket Client - SessionFactory.createSession causes java.lang.NullPointerException
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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
>> _______________________________________________
>> jetty-users mailing list
>> jetty-users@xxxxxxxxxxx
>> https://dev.eclipse.org/mailman/listinfo/jetty-users
>
>
>
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