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Re: [jetty-users] Jetty9 WebSocket Client - SessionFactory.createSession causes java.lang.NullPointerException
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When I run the example
http://www.eclipse.org/jetty/documentation/current/jetty-websocket-client-api.html
on Android 4.2 emulator (with Java SDK 1.7),
I've got an error :
java.lang.ExceptionInInitializerError
on
client.connect(socket, echoUri, request);
I'd like to confirm if Jetty9 works on Android with Java7.
I don't know the reason it's not working.
Thanks.
On Thu, Jan 16, 2014 at 6:41 AM, Ken OKABE <kenokabe@xxxxxxxxx> wrote:
> PS.
> http://download.eclipse.org/jetty/stable-9/apidocs/org/eclipse/jetty/websocket/client/ClientUpgradeRequest.html
>
> Allowing a generate from a UpgradeRequest
>
> String generate()
> String getKey()
> void setCookiesFrom(CookieStore cookieStore)
> void setRequestURI(URI uri)
>
> I guessed this is for 're-use' the instance with another URI or Cookie?
>
> If so, I think this value is not needed to such a SimpleEchoClient
> example, and I also would omit it.
>
> Regards,
>
> Ken
>
> On Thu, Jan 16, 2014 at 6:33 AM, Ken OKABE <kenokabe@xxxxxxxxx> wrote:
>> Joakim,
>>
>> I found the example of files you provided is identical to
>> http://www.eclipse.org/jetty/documentation/current/jetty-websocket-client-api.html
>> which is handy to overview in a single page, so just for future reference.
>>
>> Everything seems clear to me except one thing.
>> In the simple example, I found
>>
>> ClientUpgradeRequest request = new ClientUpgradeRequest();
>> client.connect(socket, echoUri, request);
>>
>> and I could not find any information for what exactly the
>> ClientUpgradeRequest is.
>>
>> Referring to
>>
>> http://download.eclipse.org/jetty/stable-9/apidocs/org/eclipse/jetty/websocket/client/WebSocketClient.html
>>
>> Future<Session> connect(Object websocket, URI toUri)
>> Future<Session> connect(Object websocket, URI toUri,
>> ClientUpgradeRequest request)
>>
>> You can omit ClientUpgradeRequest, and the example does not tweak this value.
>>
>> Could you give me some pointer for what ClientUpgradeRequest is.
>>
>> Thanks again.
>>
>> Ken
>>
>> On Thu, Jan 16, 2014 at 6:07 AM, Joakim Erdfelt <joakim@xxxxxxxxxxx> wrote:
>>> I need to write an update to that article.
>>>
>>> --
>>> 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 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
>>>> >> _______________________________________________
>>>> >> jetty-users mailing list
>>>> >> jetty-users@xxxxxxxxxxx
>>>> >> https://dev.eclipse.org/mailman/listinfo/jetty-users
>>>> >
>>>> >
>>>> >
>>>> > _______________________________________________
>>>> > jetty-users mailing list
>>>> > jetty-users@xxxxxxxxxxx
>>>> > https://dev.eclipse.org/mailman/listinfo/jetty-users
>>>> >
>>>> _______________________________________________
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>>>
>>>
>>>
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