INT-718. OSGi-enabled the sample. README file is included.

spring-integration-samples/helloworld/src/main/java/org/springframework/integration/samples/helloworld/HelloWorldDemo.java

@@ -16,6 +16,7 @@
 
 package org.springframework.integration.samples.helloworld;
 
+import org.springframework.context.ApplicationContext;
 import org.springframework.context.support.AbstractApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
 import org.springframework.integration.channel.BeanFactoryChannelResolver;
@@ -37,17 +38,22 @@ import org.springframework.integration.message.StringMessage;
  * element) in 'helloWorldDemo.xml' within this same package.
  * 
  * @author Mark Fisher
+ * @author Oleg Zhurakousky
  */
 public class HelloWorldDemo {
 
 	public static void main(String[] args) {
-		AbstractApplicationContext context = new ClassPathXmlApplicationContext("helloWorldDemo.xml", HelloWorldDemo.class);
-		ChannelResolver channelResolver = new BeanFactoryChannelResolver(context);
+		HelloWorldDemo demo = new HelloWorldDemo();
+		AbstractApplicationContext applicationContext = new ClassPathXmlApplicationContext("helloWorldDemo.xml", HelloWorldDemo.class);	
+		demo.performDemo(applicationContext);
+		applicationContext.stop();
+	}
+	
+	public void performDemo(ApplicationContext applicationContext){
+		ChannelResolver channelResolver = new BeanFactoryChannelResolver(applicationContext);
 		MessageChannel inputChannel = channelResolver.resolveChannelName("inputChannel");
 		PollableChannel outputChannel = (PollableChannel) channelResolver.resolveChannelName("outputChannel");
 		inputChannel.send(new StringMessage("World"));
-		System.out.println(outputChannel.receive(0).getPayload());
-		context.stop();
+		System.out.println("==> HelloWorldDemo: " + outputChannel.receive(0).getPayload());
 	}
-
 }

spring-integration-samples/helloworld/src/main/java/org/springframework/integration/samples/osgi/helloworld/HelloWorldBundleActivator.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2002-2009 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.samples.osgi.helloworld;
+
+import org.osgi.framework.BundleActivator;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.Constants;
+import org.osgi.framework.ServiceEvent;
+import org.osgi.framework.ServiceListener;
+import org.osgi.framework.ServiceReference;
+import org.springframework.context.ApplicationContext;
+import org.springframework.integration.samples.helloworld.HelloWorldDemo;
+/**
+ * Simple BundleActivator which will register ServiceListener which will listen for 
+ * ApplicationContext published event. Once event is received, HelloWorldDemo will be executed.
+ * 
+ * @author Oleg Zhurakousky
+ */
+public class HelloWorldBundleActivator implements BundleActivator, ServiceListener{
+	private BundleContext context;
+	/**
+	 * 
+	 */
+	public void start(BundleContext context) throws Exception {
+		this.context = context;		
+		context.addServiceListener(this);
+	}
+	/**
+	 * 
+	 */
+	public void stop(BundleContext context) throws Exception {}
+	/**
+	 * 
+	 */
+	public void serviceChanged(ServiceEvent serviceEvent) {
+		ServiceReference sr = serviceEvent.getServiceReference();
+		if (context.getBundle().getSymbolicName().equals(sr.getProperty(Constants.BUNDLE_SYMBOLICNAME))){
+			ApplicationContext applicationContext = (ApplicationContext) context.getService(sr);
+			new HelloWorldDemo().performDemo(applicationContext);
+		}	
+	}
+}

spring-integration-samples/helloworld/src/main/resources/META-INF/MANIFEST.MF

@@ -0,0 +1,10 @@
+Manifest-Version: 1.0
+Bundle-Version: 1.0.3
+Bundle-Name: org.springframework.integration.samples.helloworld
+Bundle-ManifestVersion: 2
+Bundle-SymbolicName: org.springframework.integration.samples.helloworld
+Bundle-Activator: org.springframework.integration.samples.osgi.helloworld.HelloWorldBundleActivator
+Import-Package: org.osgi.framework;version="[1.4.0,1.4.0]"
+Import-Library: org.aspectj;version="[1.6.2.RELEASE,1.6.2.RELEASE]",
+ org.springframework.spring;version="[2.5.6.A,2.5.6.A]"
+Import-Bundle: org.springframework.integration;version="(1.0.2,1.0.4)"

spring-integration-samples/helloworld/src/main/resources/META-INF/spring/helloWorldDemo-osgi.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans:beans xmlns="http://www.springframework.org/schema/integration"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:beans="http://www.springframework.org/schema/beans"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans
+			http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
+			http://www.springframework.org/schema/integration
+			http://www.springframework.org/schema/integration/spring-integration-1.0.xsd">
+
+	<channel id="inputChannel"/>
+
+	<channel id="outputChannel">
+		<queue capacity="10"/>
+	</channel>
+
+	<service-activator input-channel="inputChannel"
+	                   output-channel="outputChannel"
+	                   method="sayHello">
+	    <beans:bean class="org.springframework.integration.samples.helloworld.HelloService"/>
+	</service-activator>
+</beans:beans>