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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

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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:
    Creating your first project
  2. Under the templates section, select Spring Integration Project - Simple. Provide a project name, for example, sisimple, as shown in the following screenshot:
    Creating your first project
  3. Fill in the information required to create a Maven-based project, as shown in this screenshot:
    Creating your first project
  4. Click on Finish; this will create a project with the name that was provided by us (sisimple), as shown in this screenshot:
    Creating your first project

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:

STS visual editor

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:

STS visual editor

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:

STS visual editor

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.

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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Description

This book is intended for developers who are either already involved with enterprise integration or planning to venture into the domain. Basic knowledge of Java and Spring is expected. For newer users, this book can be used to understand an integration scenario, what the challenges are, and how Spring Integration can be used to solve it. Prior experience of Spring Integration is not expected as this book will walk you through all the code examples.

Who is this book for?

This book is intended for developers who are either already involved with enterprise integration or planning to venture into the domain. Basic knowledge of Java and Spring is expected.

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
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Publication date : Feb 20, 2015
Length: 198 pages
Edition : 1st
Language : English
ISBN-13 : 9781783989164
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Publication date : Feb 20, 2015
Length: 198 pages
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Language : English
ISBN-13 : 9781783989164
Vendor :
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Tools :

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Table of Contents

11 Chapters
1. Getting Started Chevron down icon Chevron up icon
2. Message Ingestion Chevron down icon Chevron up icon
3. Message Processing Chevron down icon Chevron up icon
4. Message Transformers Chevron down icon Chevron up icon
5. Message Flow Chevron down icon Chevron up icon
6. Integration with External Systems Chevron down icon Chevron up icon
7. Integration with Spring Batch Chevron down icon Chevron up icon
8. Testing Support Chevron down icon Chevron up icon
9. Monitoring, Management, and Scaling Up Chevron down icon Chevron up icon
10. An End-to-End Example Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Half star icon Empty star icon Empty star icon 2.7
(3 Ratings)
5 star 0%
4 star 33.3%
3 star 33.3%
2 star 0%
1 star 33.3%
John C. Gunvaldson Aug 13, 2015
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Book Review – Spring Integration EssentialsAuthor: Chandan Pandey, Pages: ~ 175My take on “Spring Integration Essentials” can be condensed, at the very least, to a quick how-to for the configuration of Java Message Service (JMS) on the Client Side. JMS is foremost a huge API for the formal communication known as messaging between computers (lightweight messaging and declarative adapters). Spring Integration extends Spring programming to support various Enterprise Integration Patterns (including JMS). This book, Spring Integration Essentials is very much a how-to with examples for much of the work of Integrating JMS into a Spring Application.I would be the first to admit that Grokking the entirety of the Enterprise Integration Patterns is an inherently difficult task. That building out an ESB, MessageQue and various data support services is only the tip of the alphabet of technology soup that must be mastered (all technologies we are building out here at work this year). All necessary to support higher levels of abstraction that current architectures require. Somewhere near the core of all this work is gaining experience and expertise in Messaging Systems, Messaging Channels, Message Construction, Message Routing, Message Transformation and Messaging Endpoints (and many others). If this is the work at hand for you (in your Spring application), then this book will help you with your understanding of these topics.There are roughly 10 chapters with an End-to-End example project in the last chapter. This last chapter is succinct, brief and rapidly moves through examples for Ingesting data, Aggregating feeds, Transforming feeds into appropriate formats and Integrating data from a database. Finally the example project shows sending mail, and putting a message on the JMS Queue.I wouldn’t think twice about picking up this book if this is where your Spring work is. You are very likely to appreciate the code examples and concepts – you’ll just probably want more! And more, as the author states, is as close as http://projects.spring.io/spring-integration/, which this book very nicely complements.
Amazon Verified review Amazon
Amazon Kunde Jul 26, 2017
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
As mentioned, the explanation of the Spring Integration capabilities are good, but there is no deeper insight of the spring-integration-java-dsl (created on github on Feb 2, 2014). The code examples are just xml configurated.
Amazon Verified review Amazon
Java Anniyan Aug 29, 2015
Full star icon Empty star icon Empty star icon Empty star icon Empty star icon 1
I dont see any good working examples , all it talks about configuration and how to get working example is up to the readers. If all i look is these configuration details i would go to the spring web site for it
Amazon Verified review Amazon
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