From e560a5fdbce67605678020674037e029ba8e4e8e Mon Sep 17 00:00:00 2001
From: Oleg Zhurakousky <ozhurakousky@vmware.com>
Date: Tue, 3 Nov 2009 10:52:29 +0000
Subject: [PATCH] INT-868. Defined ControlBus interface and
 ControlBusMessageHandler to handle ControlBus messages

---
 .../integration/controlbus/ControlBus.java    | 29 ++++++++++++
 .../controlbus/ControlBusMessageHandler.java  | 45 +++++++++++++++++++
 2 files changed, 74 insertions(+)
 create mode 100644 org.springframework.integration/src/main/java/org/springframework/integration/controlbus/ControlBus.java
 create mode 100644 org.springframework.integration/src/main/java/org/springframework/integration/controlbus/ControlBusMessageHandler.java

diff --git a/org.springframework.integration/src/main/java/org/springframework/integration/controlbus/ControlBus.java b/org.springframework.integration/src/main/java/org/springframework/integration/controlbus/ControlBus.java
new file mode 100644
index 0000000000..ce448ead93
--- /dev/null
+++ b/org.springframework.integration/src/main/java/org/springframework/integration/controlbus/ControlBus.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2002-2008 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 org.springframework.integration.controlbus;
+
+import org.springframework.integration.channel.SubscribableChannel;
+
+/**
+ * Defines base interface for implementation of the Control Bus EIP pattern ({@linkplain http://www.eaipatterns.com/ControlBus.html})
+ * Control Bus infrastructure is assembled with various components provided by the framework with the main entry point 
+ * being {@link SubscribableChannel} making this interface more of a convenience wrapper over target {@link SubscribableChannel}
+ * 
+ * @author Oleg Zhurakousky
+ * @since 2.0
+ */
+public interface ControlBus extends SubscribableChannel {
+}
diff --git a/org.springframework.integration/src/main/java/org/springframework/integration/controlbus/ControlBusMessageHandler.java b/org.springframework.integration/src/main/java/org/springframework/integration/controlbus/ControlBusMessageHandler.java
new file mode 100644
index 0000000000..e47bcc2a38
--- /dev/null
+++ b/org.springframework.integration/src/main/java/org/springframework/integration/controlbus/ControlBusMessageHandler.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2002-2008 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 org.springframework.integration.controlbus;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.integration.core.CommandMessage;
+import org.springframework.integration.core.Message;
+import org.springframework.integration.message.MessageDeliveryException;
+import org.springframework.integration.message.MessageHandler;
+import org.springframework.integration.message.MessageHandlingException;
+import org.springframework.integration.message.MessageRejectedException;
+
+/**
+ * @author Oleg Zhurakousky
+ * @since 2.0
+ */
+public class ControlBusMessageHandler implements MessageHandler {
+	private static final Log log = LogFactory.getLog(ControlBusMessageHandler.class);
+	/**
+	 * 
+	 */
+	public void handleMessage(Message<?> message)
+			throws MessageRejectedException, MessageHandlingException,
+			MessageDeliveryException {
+		if (message instanceof CommandMessage<?>){
+			log.debug("Handling CommandMessage: " + message);
+			((CommandMessage<?>)message).execute();
+		}
+	}
+
+}