Spring Integration Standalone application with Spring Boot

I had earlier blogged about a way to write a standalone Spring Integration application.
Spring Boot makes creating this standalone application much simpler.

The simple flow was to poll the USGS service providing information about the earthquake activity around the world and to log this information. The flow described using Spring Integration is the following:

<int:inbound-channel-adapter channel="quakeinfotrigger.channel" expression="''">
  <int:poller fixed-delay="60000"></int:poller>

 <int:channel id="quakeinfo.channel">
  <int:queue capacity="10"/>

 <int:channel id="quakeinfotrigger.channel"></int:channel> 

 <int-http:outbound-gateway id="quakerHttpGateway"

 <int:logging-channel-adapter id="messageLogger" log-full-message="true" channel="quakeinfo.channel" level="ERROR">
  <int:poller fixed-delay="5000" ></int:poller>

Pre-boot, the way to write a main program to start this flow would have been along these lines:

package standalone;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {
 public static void main(String[] args) {
  ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:/httpgateway.xml");

With Spring-boot however the configuration is IMHO simpler:

package standalone;

import org.springframework.boot.SpringApplication;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;

public class Main {

 public static void main(String[] args) {
  SpringApplication.run(Main.class, args);

And with this change, along with the spring-boot-maven-plugin plugin, the application can be started up this way:

mvn spring-boot:run

I had a very small hand in fixing this start-up script by contributing a change to the plugin to start-up the application without needing to manually run the compilation step first.

Even better, the spring-boot-maven-plugin provides tools to package the entire application into a executable jar which gets triggered during the package phase, along the lines of shade plugin:

mvn package

and the executable jar run this way:

java -jar target/si-standalone-sample-1.0-SNAPSHOT.jar
  • An updated project with this change is available at this github location – https://github.com/bijukunjummen/si-standalone-sample


Related Whitepaper:

Functional Programming in Java: Harnessing the Power of Java 8 Lambda Expressions

Get ready to program in a whole new way!

Functional Programming in Java will help you quickly get on top of the new, essential Java 8 language features and the functional style that will change and improve your code. This short, targeted book will help you make the paradigm shift from the old imperative way to a less error-prone, more elegant, and concise coding style that’s also a breeze to parallelize. You’ll explore the syntax and semantics of lambda expressions, method and constructor references, and functional interfaces. You’ll design and write applications better using the new standards in Java 8 and the JDK.

Get it Now!  

Leave a Reply

three × = 3

Java Code Geeks and all content copyright © 2010-2014, Exelixis Media Ltd | Terms of Use | Privacy Policy
All trademarks and registered trademarks appearing on Java Code Geeks are the property of their respective owners.
Java is a trademark or registered trademark of Oracle Corporation in the United States and other countries.
Java Code Geeks is not connected to Oracle Corporation and is not sponsored by Oracle Corporation.

Sign up for our Newsletter

20,709 insiders are already enjoying weekly updates and complimentary whitepapers! Join them now to gain exclusive access to the latest news in the Java world, as well as insights about Android, Scala, Groovy and other related technologies.

As an extra bonus, by joining you will get our brand new e-books, published by Java Code Geeks and their JCG partners for your reading pleasure! Enter your info and stay on top of things,

  • Fresh trends
  • Cases and examples
  • Research and insights
  • Two complimentary e-books