Re: ServerSocket from within Tapestry

Hi!

I have to develop a chat on a Tapestry5 app and I have to include WebSockets. To do it i put the config below:

I create a ChatServlet class outside Tapestry5 packages

my.package.
		    chat -> ChatServlet
		    web.
			   pages
			   components
			   services
			   mixins

ChatServlet.java :

package mypackage.chat;

@ServerEndpoint(value = "/chat")
public class ChatServlet extends HttpServlet {
	
	@OnOpen
	public void onOpen(Session session) throws Exception {
	…

	@OnMessage
	public void onMessage(Session session, String message) throws Exception {
	…

AppModule.java:

public static void contributeIgnoredPathsFilter(final Configuration<String> configuration) {
		configuration.add("/chat.*");
}

web.xml

	<servlet>
		<servlet-name>chat-servlet</servlet-name>
		<servlet-class>mypackage.chat.ChatServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>chat-servlet</servlet-name>
		<url-pattern>/chat</url-pattern>
	</servlet-mapping>

And after to add this config, you can connect directly. With javascript is:

new WebSocket("ws://"+ baseUrl +"/chat”);

I hope the configuration for webapp helps you.

Regards

Carlos Montero Canabal


> El 7/6/2018, a las 8:10, Christopher Dodunski <[email protected]> escribió:
> 
> Thanks Eugen, and where did you place the server-side class decorated with
> @ServerEndpoint("/ws")?  Perhaps it doesn't matter whether it is placed in
> 'pages' or 'services', as Tomcat finds it regardless.
> 
> Is it necessary to invoke new threads (multi-threading) within each of the
> methods decorated with @OnOpen, @OnClose, @OnMessage and @OnError, or does
> Tomcat automatically handle cases of multiple, simultaneous client
> connections?
> 
> I found the below 'howto' on using Tomcat WebSockets, but the client side
> code is implemented in HTML and JavaScript, not Java.  It would be useful
> to find some sample, client-side Java code for connecting and
> communicating via a Tomcat WebSocket.
> 
> https://examples.javacodegeeks.com/enterprise-java/tomcat/apache-tomcat-websocket-tutorial/
> 
> Regards,
> 
> Chris.
> 
> 
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