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Spring Integration Essentials
Spring Integration Essentials

Spring Integration Essentials: Integrate the heterogeneous endpoints of enterprise applications with Spring Integration for effective communication

By CHANDAN K PANDEY
€19.99 €13.98
Book Feb 2015 198 pages 1st Edition
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Product Details

Publication date : Feb 20, 2015
Length 198 pages
Edition : 1st Edition
Language : English
ISBN-13 : 9781783989164
Vendor :
Oracle
Category :
Web Development
Languages :
Java (Intermediate)
Concepts :
Front End Web Development
Tools :
Spring (Intermediate)
Table of content icon View table of contents Preview book icon Preview Book

Spring Integration Essentials

Chapter 1. Getting Started

In this chapter, we will set up our development environment and discuss how we can leverage SpringSource Tool Suite (STS) to its maximum. Although any popular Java development IDE such as Eclipse, intelliJ, NetBeans, and others can be used for developing Spring Integration solutions, pivotal, the company spearheading Spring Integration, recommends that you use STS which is an Eclipse-based IDE.

Setting up STS

STS comes with many off-the-shelf plugins, visual editors, and other features, which ease the development of Spring-powered enterprise applications. The look and feel of the IDE is very similar to Eclipse. Install STS by following these steps:

  1. JDK 1.6 and above is a prerequisite, download and install it from http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase6-419409.html.

  2. Set JAVA_HOME properties as explained in the documentation at https://docs.oracle.com/cd/E19182-01/820-7851/inst_cli_jdk_javahome_t/index.html.

  3. Download STS from http://spring.io/tools/sts.

  4. The downloaded file is in ZIP format. Extract it to the preferred folder and it's all set.

  5. Go to <installation-directory>\sts-bundle\sts-3.6.1.RELEASE. The STS.exe file is the executable for launching the IDE.

  6. This step is optional but can help in efficient functioning of the OS editor—change the memory allocation parameter. Locate STS.ini (in the same folder as STS.exe) and change the value of Xmx. For 2 GB, I've put it as Xmx2048m.

Creating your first project

The following steps will help you in creating your first project:

  1. Create a Spring Integration project by navigating to File | Spring Project, as shown in the following screenshot:

  2. Under the templates section, select Spring Integration Project - Simple. Provide a project name, for example, sisimple, as shown in the following screenshot:

  3. Fill in the information required to create a Maven-based project, as shown in this screenshot:

  4. Click on Finish; this will create a project with the name that was provided by us (sisimple), as shown in this screenshot:

This project is as simple as it can be. Let's take a quick look at the generated Java classes in the following points:

  • Main.java: This file is located at the path: /sisimple/src/main/java/com/chandan/example/si/. It has the main method and will be used to run this sample. Right-click on this file from the package explorer and click on Run As | Java Application—this will start the program. This class has the code to bootstrap Spring Integration configuration files and load components defined in it. Additionally, it converts user input to upper case.

  • StringConversionService.java: This file is located at the path: /sisimple/src/main/java/com/chandan/example/si/service/. This is the service interface that is used to convert user input to upper case.

  • spring-integration-context.xml: This file is located at the path: /sisimple/src/main/resources/META-INF/spring/integration/. It is the Spring Integration configuration file. It contains the XML-based declaration of Spring Integration components.

  • log4j.xml: This file is located at the path: /sisimple/src/main/resources/. It is the Log4j configuration file. It can be edited to control the log level, appenders, and other logging-related aspects.

  • StringConversionServiceTest.java: This file is located at the path: /sisimple/src/test/java/com/chandan/example/si/. This is the test file for StringConversionService. This will be used to run tests against the service classes.

  • pom.xml: This is the file used for rmaven dependency management, located in /sisimple/. It has entries for all the dependencies used by the project.

It will be a bit heavy and premature to explain each of the components in these classes and configuration files without having built up some theoretical concepts—we will discuss each of the elements in detail, as we move ahead in the chapters.

STS visual editor

STS provides visual ways to add different namespaces. Locate spring-integration-context.xml under /sisimple/src/main/resources/META-INF/spring/integration/ and open it. This is the default Spring configuration file. Click on the Namespaces tab to manage different namespaces of Spring Integration. The following screenshot shows imported namespaces for this sample project:

In the same editor, clicking on the Integration-graph tab will open a visual editor, which can be used to add/modify or delete endpoints, channels, and other components of Spring Integration. The following screenshot contains the integration graph for our sample project:

Let's have a quick look at the generated Maven POM—overall, there are three dependencies; only one for Spring Integration, and the other ones for Junit and log4j, as shown in the following screenshot:

Spring Integration Scala DSL

This is still in the very early stages and is an incubation project. Scala DSL should not be confused with other EIP implementations being offered in Scala—rather, it is built on top of Spring Integration and provides DSL-based configuration and flow management.

Note

Check out the official Spring Integration Scala DSL blog at http://spring.io/blog/2012/03/05/introducing-spring-integration-scala-dsl/ and the GitHub page at https://github.com/spring-projects/spring-integration-dsl-groovy.

Summary

In this chapter, you learned how to set up your IDE and created a basic project. We also tried our hands at the visual editor of STS and covered a quick introduction of the upcoming Scala DSL for Spring Integration. We will leverage this knowledge to build a compelling Spring Integration application using STS throughout the rest of the chapters.

In the next chapter, we will cover how to ingest messages in the application and then how to process them.

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Page 1 of 6

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Key benefits

What you will learn

Set up your Spring tool suite IDE to get the best support possible for Spring Integration Discover how messages can be consumed from external sources Understand the different ways in which a message can be processed once it is inside the system Transform messages from one format to another Orchestrate message flow across endpoints Use Spring Integration components to connect to external systems such as databases, FTP servers, social networking sites, and process batch jobs Test and scale up your Spring Integration application to monitor and manage its performance

What do you get with eBook?

Product feature icon Instant access to your Digital eBook purchase
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
Buy Now

Product Details

Publication date : Feb 20, 2015
Length 198 pages
Edition : 1st Edition
Language : English
ISBN-13 : 9781783989164
Vendor :
Oracle
Category :
Web Development
Languages :
Java (Intermediate)
Concepts :
Front End Web Development
Tools :
Spring (Intermediate)

Table of Contents

18 Chapters
Spring Integration Essentials Chevron down icon Chevron up icon
Spring Integration Essentials
Credits Chevron down icon Chevron up icon
Credits
About the Author Chevron down icon Chevron up icon
About the Author
Acknowledgments Chevron down icon Chevron up icon
Acknowledgments
About the Reviewers Chevron down icon Chevron up icon
About the Reviewers
www.PacktPub.com Chevron down icon Chevron up icon
www.PacktPub.com
Preface Chevron down icon Chevron up icon
Preface
Getting Started Chevron down icon Chevron up icon
Getting Started
Setting up STS
Creating your first project
STS visual editor
Spring Integration Scala DSL
Summary
Message Ingestion Chevron down icon Chevron up icon
Message Ingestion
Working with message channels
Channel types
Spring implementation of channels
Selecting a channel
Error handling on channels
Persisting and recovering channels
Channel interceptors
Summary
Message Processing Chevron down icon Chevron up icon
Message Processing
Message endpoints
Gateways
Service activators
Delayers
Transactions
Summary
Message Transformers Chevron down icon Chevron up icon
Message Transformers
Introducing message transformers
Working with XML payload
Validating XML messages
Beyond default transformers
Content enrichers
Claim check
Summary
Message Flow Chevron down icon Chevron up icon
Message Flow
Routers
Using annotations
Filters
Splitters
Aggregators
Resequencers
Chaining handlers
Summary
Integration with External Systems Chevron down icon Chevron up icon
Integration with External Systems
Working with files
FTP/FTPS
Social integration
Enterprise messaging
HTTP
Web services
Database SQL
Stream processing
Summary
Integration with Spring Batch Chevron down icon Chevron up icon
Integration with Spring Batch
Spring Batch
Defining a Spring Batch job
Spring Batch and Spring Integration
Summary
Testing Support Chevron down icon Chevron up icon
Testing Support
Prerequisite
Testing messages
Testing headers
Handling errors
Testing filters
Splitter test
Summary
Monitoring, Management, and Scaling Up Chevron down icon Chevron up icon
Monitoring, Management, and Scaling Up
Monitoring and management
Scaling up
Summary
An End-to-End Example Chevron down icon Chevron up icon
An End-to-End Example
Prerequisites
Ingesting data
The aggregator
The splitter
Transformation
Router
Integration
Exporting as an MBean
Summary
Index Chevron down icon Chevron up icon
Index

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Authors (1)

Profile icon CHANDAN K PANDEY
Chandan Pandey is an Oracle Certified Enterprise architect with more than 10 years of experience in designing, coding, and delivering enterprise applications using various tools and technologies. He has always been amused by the power of software that reduces the boredom of repetitive tasks and introduces agility and efficiency. He firmly believes that tools, technology, and methodology are a medium to provide a solution and would like to be positioned as a solutions expert rather than limiting his identity to a framework or tool. This is reflected in the breadth and depth of his work; he is proficient not only in traditional languages and frameworks such as Java/JEE and Spring, but also in Groovy and Grails, Vaadin, and Play Framework, to name a few. His domain experience varies from blogging applications, web frameworks, content management systems, and finance, to networking & telecom. For him, the end result should be extendable, scalable, secure, and easy-to-use systems! He believes in community ecosystems and tries to share his learning with larger audiences. He writes regularly at www.chandanpandey.com, and this book is a step forward to connect with the community. When he is not working or writing, he likes to go on road trips with his family to explore new avenues—be it spiritual, historical, or just a leisure tour! India being his home country, he is never short of surprises and variety!
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