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Spring Integration Essentials

By : CHANDAN K PANDEY

2.7 (3)

Spring Integration Essentials

2.7 (3)

By: CHANDAN K PANDEY

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.

Preface

Preface

How enterprise integration challenges can be solved

Who are the players?

Why Spring Integration?

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Getting Started

1. Getting Started

Setting up STS

Creating your first project

STS visual editor

Spring Integration Scala DSL

Summary

2. Message Ingestion

2. 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

3. Message Processing

3. Message Processing

Message endpoints

Gateways

Service activators

Delayers

Transactions

Summary

4. Message Transformers

4. Message Transformers

Introducing message transformers

Working with XML payload

Validating XML messages

Beyond default transformers

Content enrichers

Claim check

Summary

5. Message Flow

5. Message Flow

Routers

Using annotations

Filters

Splitters

Aggregators

Resequencers

Chaining handlers

Summary

6. Integration with External Systems

6. Integration with External Systems

Working with files

FTP/FTPS

Social integration

Enterprise messaging

HTTP

Web services

Database SQL

Stream processing

Summary

7. Integration with Spring Batch

7. Integration with Spring Batch

Spring Batch

Defining a Spring Batch job

Spring Batch and Spring Integration

Summary

8. Testing Support

8. Testing Support

Prerequisite

Testing messages

Testing headers

Handling errors

Testing filters

Splitter test

Summary

9. Monitoring, Management, and Scaling Up

9. Monitoring, Management, and Scaling Up

Monitoring and management

Scaling up

Summary

10. An End-to-End Example

10. An End-to-End Example

Prerequisites

Ingesting data

The aggregator

The splitter

Transformation

Router

Integration

Exporting as an MBean

Summary

Index

Index

Splitters

Splitters, as the name suggests, are used to split messages in smaller chunks and then send such resulting chunks for independent processing. There can be several reasons for splitting—larger size of payload than that of what is acceptable by the next endpoint, or message load parts that can be processed in parallel or down the chain. There is an aggregator and it is necessary to do some processing before these can be aggregated. Spring Integration provides a splitter tag. As in the case of a filter, splitters can also be written either by extending the framework interface or by writing a custom POJO.

Let's take the simpler one first, leveraging a simple Java class as a splitter:

<int:splitter
  ref="splitterSoFeedBean" 
  method="splitAndPublish" 
  input-channel="filteredFeedChannel" 
  output-channel="splitFeedOutputChannel" />


<bean id="splitterSoFeedBean" 
  class="com.cpandey.siexample.splitter.SoFeedSplitter...

CONTINUE READING

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Tech Concepts

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Programming languages

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