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  • Book Overview & Buying Spring Integration Essentials
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Spring Integration Essentials

Spring Integration Essentials

By : CHANDAN K PANDEY
2.7 (3)
Buy this Book
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Spring Integration Essentials

Spring Integration Essentials

2.7 (3)
By: CHANDAN K PANDEY
Buy this Book

Overview of this book

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.
Table of Contents (12 chapters)
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Preface
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Preface
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How enterprise integration challenges can be solved
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Who are the players?
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Why Spring Integration?
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Getting Started
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1. Getting Started
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Setting up STS
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Creating your first project
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STS visual editor
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Spring Integration Scala DSL
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Summary
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2. Message Ingestion
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2. Message Ingestion
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Working with message channels
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Channel types
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Spring implementation of channels
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Selecting a channel
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Error handling on channels
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Persisting and recovering channels
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Channel interceptors
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Summary
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3. Message Processing
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3. Message Processing
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Message endpoints
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Gateways
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Service activators
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Delayers
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Transactions
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Summary
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4. Message Transformers
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4. Message Transformers
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Introducing message transformers
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Working with XML payload
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Validating XML messages
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Beyond default transformers
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Content enrichers
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Claim check
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Summary
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5. Message Flow
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5. Message Flow
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Routers
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Using annotations
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Filters
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Splitters
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Aggregators
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Resequencers
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Chaining handlers
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Summary
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6. Integration with External Systems
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6. Integration with External Systems
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Working with files
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FTP/FTPS
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Social integration
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Enterprise messaging
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HTTP
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Web services
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Database SQL
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Stream processing
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Summary
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7. Integration with Spring Batch
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7. Integration with Spring Batch
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Spring Batch
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Defining a Spring Batch job
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Spring Batch and Spring Integration
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Summary
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8. Testing Support
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8. Testing Support
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Prerequisite
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Testing messages
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Testing headers
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Handling errors
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Testing filters
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Splitter test
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Summary
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9. Monitoring, Management, and Scaling Up
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9. Monitoring, Management, and Scaling Up
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Monitoring and management
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Scaling up
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Summary
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10. An End-to-End Example
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10. An End-to-End Example
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Prerequisites
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Ingesting data
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The aggregator
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The splitter
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Transformation
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Router
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Integration
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Exporting as an MBean
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Summary
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Index
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Index

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.

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Spring Integration Essentials
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