title: How to respond to a Web Services request via WebSockets
body: <p>I have a WebSockets connection between a server and a client. This allows me to send a command to a client, and he responds me with data. The server has web services too. I can then tell, "do this command on that client". So we have:</p>
  
  <p>Client1 ---webservices--> server ---websockets---> Client2</p>
  
  <p>The problem is, the method on the server which receives the data from Client2 is <strong>void</strong>.</p>
  
  <p>How can I send back the data to Client1 ?</p>
  
  <p><strong>WebServices:</strong></p>
  
  <pre><code>@Path("/ws")
  public class QOSResource {
      public QOSResource(){}
  
      @Produces(MediaType.TEXT_PLAIN)
      @Path("/ping/{macAddr}")
      @GET
      public String getPing(@PathParam("macAddr") String macAddr){
      return"Mac adresse : "+macAddr;
      //WebSocketsCentralisation.getInstance().ping(macAddr);
      }
  }
  </code></pre>
  
  <p><strong>WebSockets</strong></p>
  
  <pre><code>@OnWebSocketMessage
      public **void** onText(Session session, String message) {
          if (session.isOpen()) {
              if(firstConnection){
                  firstConnection = false;
                  this.macAddr = message;
                  WebSocketsCentralisation.getInstance().join(this);
              }
              ObjectMapper mapper = new ObjectMapper();
                  Object o;
                  try {
                      o = mapper.readValue(message, Object.class);
                      if(o instanceof PingResult){
                           **// TODO return result to ws**
  
                          }
                  } catch (JsonParseException e) {
                      // TODO Auto-generated catch block
                      e.printStackTrace();
                  } catch (JsonMappingException e) {
                      // TODO Auto-generated catch block
                      e.printStackTrace();
                  } catch (IOException e) {
                      // TODO Auto-generated catch block
                      e.printStackTrace();
                  }
          }
      }
  </code></pre>
  
  <p>Thanks in advance for your help</p>