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Re: [jetty-users] Jetty9 WebSocket Client - SessionFactory.createSession causes java.lang.NullPointerException
|
PS. Sorry, I forgot a line
private WebSocketSessionFactory factory = new WebSocketSessionFactory();
so the code I've tried is:
//===========================================================
private WebSocketSessionFactory factory = new WebSocketSessionFactory();
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()
{
}
};
//===========================================================
On Thu, Jan 16, 2014 at 4:54 AM, 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
