Add WebSocket Support

Fixes gh-35

samples/websocket/src/main/java/sample/mvc/MessageController.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2002-2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package sample.mvc;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.messaging.Message;
+import org.springframework.messaging.handler.annotation.MessageMapping;
+import org.springframework.messaging.simp.SimpMessageSendingOperations;
+import org.springframework.messaging.simp.annotation.SubscribeMapping;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+import sample.data.ActiveWebSocketUserRepository;
+import sample.data.InstantMessage;
+import sample.data.User;
+import sample.security.CurrentUser;
+
+/**
+ * Controller for managing {@link Message} instances.
+ *
+ * @author Rob Winch
+ *
+ */
+@Controller
+@RequestMapping("/")
+public class MessageController {
+    private SimpMessageSendingOperations messagingTemplate;
+    private ActiveWebSocketUserRepository activeUserRepository;
+
+    @Autowired
+    public MessageController(ActiveWebSocketUserRepository activeUserRepository,SimpMessageSendingOperations messagingTemplate) {
+        this.activeUserRepository = activeUserRepository;
+        this.messagingTemplate = messagingTemplate;
+    }
+
+    @RequestMapping("/")
+    public String im() {
+        return "index";
+    }
+
+    @MessageMapping("/im")
+    public void im(InstantMessage im, @CurrentUser User currentUser) {
+        im.setFrom(currentUser.getEmail());
+        messagingTemplate.convertAndSendToUser(im.getTo(),"/queue/messages",im);
+        messagingTemplate.convertAndSendToUser(im.getFrom(),"/queue/messages",im);
+    }
+
+    @SubscribeMapping("/users")
+    public List<String> subscribeMessages() throws Exception {
+        return activeUserRepository.findAllActiveUsers();
+    }
+}