Servlets and Conversation Scope

[nickarls]

Is there any special reason why the conversation scope is not active during servlet requests? Considering the conversation is propagated with the cid request parameter and I could reconstruct the conversation scope myself in a servlet (well, didn't try but shouldn't be a problem)...

[nickarls]

Here is a small utility class that you can use as an anonymous class and wrap the request with if you want conversation scope support in servlets...

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;

import org.jboss.weld.Container;
import org.jboss.weld.context.ContextLifecycle;
import org.jboss.weld.context.ConversationContext;
import org.jboss.weld.servlet.ConversationBeanStore;

public abstract class ConversationalHttpRequest {
     protected HttpServletRequest request;
     
     public ConversationalHttpRequest(HttpServletRequest request) {
          this.request = request;
     }
     
     public abstract void process() throws Exception;
     
     public void run() throws ServletException {
          try {
               initConversationContext();
               process();
          } catch (Exception e) {
               throw new ServletException("Error processing conversational request", e);
          } finally {
               cleanupConversationContext();
          }
     }

     private void initConversationContext() {
          ConversationContext conversationContext = Container.instance().deploymentServices().get(ContextLifecycle.class).getConversationContext();
          conversationContext.setBeanStore(new ConversationBeanStore(request.getSession(), request.getParameter("cid")));
          conversationContext.setActive(true);
     }

     private void cleanupConversationContext() {
          ConversationContext conversationContext = Container.instance().deploymentServices().get(ContextLifecycle.class).getConversationContext();
          conversationContext.setBeanStore(null);
          conversationContext.setActive(false);
     }

     
}