How to create a custom WebSocket
Looking around the internet I found that the way to create a socket is to create a class annotated with @WebSocket and use the desired annotated methods for events. To use this socket, the socket handler is used like this:
import org.eclipse.jetty.websocket.server.WebSocketHandler;
import org.eclipse.jetty.websocket.servlet.WebSocketServletFactory;
import rsvp.RSVPSocket;
public class RSVPWebSocketHandler extends WebSocketHandler
{
@Override
public void configure ( WebSocketServletFactory factory )
{
factory.register( MySocket.class );
}
}
My question is, if the class "MySocket" has a constructor with parameters, how can I get the factory to call this file correctly?
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You can create a socket from your servlet. For example:
@WebServlet(name = "MyWebSocketServlet", urlPatterns = {"/myurl"})
public class MyWebSocketServlet extends WebSocketServlet {
private final static int IDLE_TIME = 60 * 1000;
@Override
public void configure(WebSocketServletFactory factory) {
factory.getPolicy().setIdleTimeout(IDLE_TIME);
factory.setCreator(new CustomWebSocketCreator());
}
}
And CustomWebSocketCreator:
public class CustomWebSocketCreator implements WebSocketCreator {
@Override
public Object createWebSocket(ServletUpgradeRequest req, ServletUpgradeResponse resp) {
return new MySocket();
}
}
More details: http://www.eclipse.org/jetty/documentation/9.1.5.v20140505/jetty-websocket-server-api.html
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According to the Jetty doc you should override the createWebSocket
class's own custom inference method WebSocketCreator
(pass the instance to your creator configure
)
See also this answer How to access instances of WebSockets in Jetty 9?
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