INTSAMPLES-54 - Update README.md

* Update README.md to reflect correct classes
* Add documentation for Delayer application
* Add JavaDoc for delayer application
* Delete redundant *src/main/resources/log4j.properties*
* Add logger name to *Logging Channel Adapter* configuration
* Add Maven Exec Maven Plugin for easy execution from the command line

basic/helloworld/README.md

@@ -1,8 +1,37 @@
 Hello World Sample
 ==================
 
-This is an obvious place to get started. It demonstrates a simple message flow represented by the diagram below:
+This is an obvious place to get started. This sample project contains 2 basic sample applications:
 
-	Message -> Channel -> ServiceActivator -> QueueChannel 
+* Hello World
+* Delayer Application
+
+## Hello World
+
+The Hello World application demonstrates a simple message flow represented by the diagram below:
+
+    Message -> Channel -> ServiceActivator -> QueueChannel 
+
+To run the sample simply execute **HelloWorldApp** in package **org.springframework.integration.samples.helloworld**. You can also execute that class using the [Exec Maven Plugin](http://mojo.codehaus.org/exec-maven-plugin/):
+
+    $ mvn clean package exec:java -P hello
+
+You should see the following output:
+
+    INFO : org.springframework.integration.samples.helloworld.HelloWorldApp - ==> HelloWorldDemo: Hello World
+
+## Delayer Application
+
+This simple application will print out the current system time twice every 20 seconds.
+
+More specifically, an **Inbound Channel Adapter** polls for the current system time 2 times every 20 seconds (20000 milliseconds). The resulting message contains as payload the time in milliseconds and the message is sent to a **Logging Channel Adapter**, which will print the time to the command prompt.
+
+To run the sample simply execute **DelayerApp** in package **org.springframework.integration.samples.helloworld**. You can also execute that class using the [Exec Maven Plugin](http://mojo.codehaus.org/exec-maven-plugin/):
+
+    $ mvn clean package exec:java -P delayer
+
+You should see output like the following:
+
+    INFO : org.springframework.integration.samples.helloworld - 1328892135471
+    INFO : org.springframework.integration.samples.helloworld - 1328892135524
 
-To run sample simply execute a test case in the **org.springframework.integration.samples.helloworld** package.

basic/helloworld/pom.xml

@@ -12,7 +12,24 @@
 		<spring.integration.version>2.1.0.RELEASE</spring.integration.version>
 		<log4j.version>1.2.16</log4j.version>
 		<junit.version>4.10</junit.version>
+		<java.main.class>org.springframework.integration.samples.helloworld.HelloWorldApp</java.main.class>
 	</properties>
+
+	<profiles>
+	    <profile>
+	        <id>hello</id>
+	        <properties>
+	            <java.main.class>org.springframework.integration.samples.helloworld.HelloWorldApp</java.main.class>
+	        </properties>
+	    </profile>
+        <profile>
+            <id>delayer</id>
+            <properties>
+                <java.main.class>org.springframework.integration.samples.helloworld.DelayerApp</java.main.class>
+            </properties>
+        </profile>
+	</profiles>
+
 	<dependencies>
 		<dependency>
 			<groupId>org.springframework.integration</groupId>
@@ -45,6 +62,14 @@
 					<showDeprecation>false</showDeprecation>
 				</configuration>
 			</plugin>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>exec-maven-plugin</artifactId>
+                <version>1.2</version>
+                <configuration>
+                    <mainClass>${java.main.class}</mainClass>
+                </configuration>
+            </plugin>
 		</plugins>
 	</build>
     <repositories>

basic/helloworld/src/main/java/org/springframework/integration/samples/helloworld/DelayerApp.java

@@ -5,11 +5,17 @@ import org.springframework.context.support.ClassPathXmlApplicationContext;
 public class DelayerApp {
 
 	/**
-	 * @param args
+	 * Simple application that polls the current system time 2 times every
+	 * 20 seconds (20000 milliseconds).
+	 *
+	 * The resulting message contains the time in milliseconds and the message
+	 * is routed to a Logging Channel Adapter which will print the time to the
+	 * command prompt.
+	 *
+	 * @param args Not used.
 	 */
 	public static void main(String[] args) throws Exception{
 		new ClassPathXmlApplicationContext("META-INF/spring/integration/delay.xml");
-		System.in.read();
 	}
 
 }

basic/helloworld/src/main/resources/META-INF/spring/integration/delay.xml

@@ -11,8 +11,8 @@
 	<int:inbound-channel-adapter expression="T(java.lang.System).currentTimeMillis()" channel="logger">
 		<int:poller fixed-delay="20000" max-messages-per-poll="2" />
 	</int:inbound-channel-adapter>
-	
-	<int:logging-channel-adapter id="logger"/>
-	
+
+	<int:logging-channel-adapter id="logger" logger-name="org.springframework.integration.samples.helloworld"/>
+
 	<task:executor id="executor" queue-capacity="20" pool-size="5-20"/>
 </beans>

basic/helloworld/src/main/resources/log4j.properties

@@ -1,9 +0,0 @@
-log4j.rootCategory=WARN, stdout
-
-log4j.appender.stdout=org.apache.log4j.ConsoleAppender
-log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
-log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %t %c{2}:%L - %m%n
-
-#log4j.category.org.springframework=WARN
-#log4j.category.org.springframework.integration.sftp=TRACE
-log4j.category.org.springframework=TRACE

basic/helloworld/src/main/resources/log4j.xml

@@ -24,5 +24,5 @@
 		<priority value="warn" />
 		<appender-ref ref="console" />
 	</root>
-	
+
 </log4j:configuration>