1 files changed, 104 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/samples/learning-more/binding-websocket/pubsub-webapp/src/main/java/sample/EventProcessor.java b/sca-java-2.x/tags/2.0.1-RC1/samples/learning-more/binding-websocket/pubsub-webapp/src/main/java/sample/EventProcessor.java
new file mode 100644
index 0000000000..d289b361cf
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/samples/learning-more/binding-websocket/pubsub-webapp/src/main/java/sample/EventProcessor.java
@@ -0,0 +1,104 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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;
+
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+
+import org.apache.tuscany.sca.binding.websocket.runtime.WebsocketBindingCallback;
+import org.apache.tuscany.sca.binding.websocket.runtime.WebsocketStatus;
+import org.oasisopen.sca.ComponentContext;
+import org.oasisopen.sca.annotation.Context;
+import org.oasisopen.sca.annotation.Destroy;
+import org.oasisopen.sca.annotation.Scope;
+import org.oasisopen.sca.annotation.Service;
+
+import com.google.common.collect.HashMultimap;
+import com.google.common.collect.Multimap;
+import com.google.common.collect.Multimaps;
+
+@Service({ EventProcessorConsumerService.class, EventProcessorProducerService.class })
+@Scope("COMPOSITE")
+public class EventProcessor implements EventProcessorConsumerService, EventProcessorProducerService {
+
+    @Context
+    protected ComponentContext componentContext;
+
+    private ConcurrentMap<String, WebsocketBindingCallback> clients = new ConcurrentHashMap<String, WebsocketBindingCallback>();
+    private Multimap<String, String> eventListeners = Multimaps.synchronizedMultimap(HashMultimap.<String, String> create());
+
+    @Override
+    public void onEvent(String eventName, String eventData) {
+        List<String> destinations = new ArrayList<String>();
+        synchronized (eventListeners) {
+            destinations.addAll(eventListeners.get(eventName));
+        }
+        Event event = new Event();
+        event.setName(eventName);
+        event.setData(eventData);
+        for (String registrationId : destinations) {
+            WebsocketBindingCallback client = clients.get(registrationId);
+            if (client == null) {
+                // client has unregistered from this event
+                synchronized (eventListeners) {
+                    eventListeners.remove(eventName, registrationId);
+                }
+            } else {
+                WebsocketStatus status = client.sendMessage(event);
+                if (status == WebsocketStatus.CLOSED) {
+                    unregister(registrationId);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void register(String eventName) {
+        String registrationId = UUID.randomUUID().toString();
+        WebsocketBindingCallback callback = componentContext.getRequestContext().getCallback();
+        clients.put(registrationId, callback);
+        synchronized (eventListeners) {
+            eventListeners.put(eventName, registrationId);
+        }
+        Event event = new Event();
+        event.setId(registrationId);
+        event.setName(eventName);
+        event.setData(new Date().toString());
+        callback.sendMessage(event);
+    }
+
+    @Override
+    public void unregister(String registrationId) {
+        clients.remove(registrationId);
+        // unregistration from eventListeners done during onEvent
+    }
+
+    @Destroy
+    public void shutdown() {
+        clients.clear();
+        eventListeners.clear();
+        clients = null;
+        eventListeners = null;
+    }
+}