1 files changed, 112 insertions, 0 deletions
diff --git a/tags/java/sca/1.5.1-RC1/modules/implementation-notification/src/main/java/org/apache/tuscany/sca/implementation/notification/NotificationComponentInvoker.java b/tags/java/sca/1.5.1-RC1/modules/implementation-notification/src/main/java/org/apache/tuscany/sca/implementation/notification/NotificationComponentInvoker.java
new file mode 100644
index 0000000000..a2e35c5cb6
--- /dev/null
+++ b/tags/java/sca/1.5.1-RC1/modules/implementation-notification/src/main/java/org/apache/tuscany/sca/implementation/notification/NotificationComponentInvoker.java
@@ -0,0 +1,112 @@
+/*
+ * 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 org.apache.tuscany.sca.implementation.notification;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.invocation.InvocationChain;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
+import org.apache.tuscany.sca.runtime.RuntimeWire;
+
+/**
+ * Turns invoke into remote message fan-out
+ *
+ * @version $Rev$ $Date$
+ */
+public class NotificationComponentInvoker implements Invoker {
+
+    private static final Message RESPONSE = new ImmutableMessage();
+    private List<InvocationChain> subscriberInvocationChains;
+    private Operation operation;
+    private RuntimeComponent component;
+
+    public NotificationComponentInvoker(Operation operation, RuntimeComponent component) {
+        this.subscriberInvocationChains = null;
+        this.operation = operation;
+        this.component = component;
+    }
+    
+    public Message invoke(Message msg) {
+        addSubscriberInvocationChains();
+
+        // REVIEW Should this be done in separate thread(s)?
+        // REVIEW Should separate copies of message be used?
+        Object msgBody = msg.getBody();
+        
+        for (InvocationChain subscriberInvocationChain : subscriberInvocationChains) {
+            Invoker chainInvoker = subscriberInvocationChain.getHeadInvoker();
+            msg.setBody(msgBody);
+            chainInvoker.invoke(msg);
+        }
+        
+        return RESPONSE;
+    }
+    
+    private void addSubscriberInvocationChains() {
+        if (subscriberInvocationChains == null) {
+            subscriberInvocationChains = new ArrayList<InvocationChain>();
+            for (ComponentReference reference : component.getReferences()) {
+                if (reference.getName().indexOf("$self$") >= 0) {
+                    continue;
+                }
+                RuntimeComponentReference rtCompRef = null;
+                if (reference instanceof RuntimeComponentReference) {
+                    rtCompRef = (RuntimeComponentReference)reference;
+                }
+                else {
+                    throw new RuntimeException("Need a runtime component reference");
+                }
+                for(RuntimeWire wire : rtCompRef.getRuntimeWires()) {
+                    // This is much less efficient now !!
+                    List<InvocationChain> chains = wire.getInvocationChains();
+                    InvocationChain chain = getInvocationChain(chains, operation);
+                    subscriberInvocationChains.add(chain);
+                }
+            }
+        }
+    }
+    
+    private InvocationChain getInvocationChain(List<InvocationChain> chains, Operation operation) {
+        InvocationChain chain = null;
+        for (InvocationChain ch : chains) {
+            if (ch.getTargetOperation().equals(operation)) {
+                chain = ch;
+                break;
+            }
+        }
+        if (chain == null) {
+            for (InvocationChain ch : chains) {
+                if (ch.getTargetOperation().getName().equals(operation.getName())) {
+                    chain = ch;
+                    break;
+                }
+            }
+            if (chain == null) {
+                throw new RuntimeException("Can't find a compatible chain");
+            }
+        }
+        return chain;
+    }
+}