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  • Book Overview & Buying Mastering Apache Camel
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Mastering Apache Camel

Mastering Apache Camel

By : Jean-Baptiste Onofré
3.2 (6)
Buy this Book
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Mastering Apache Camel

Mastering Apache Camel

3.2 (6)
By: Jean-Baptiste Onofré
Buy this Book

Overview of this book

This book is intended for all Camel users who want to get the best out of Camel, and who want to implement the most efficient integration logic using best practices.
Table of Contents (10 chapters)
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Preface
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Preface
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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. Key Features
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1. Key Features
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What is Apache Camel?
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Components and bean support
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Predicates and expressions
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Data format and type conversion
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Easy configuration and URI
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Lightweight and different deployment topologies
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Quick prototyping and testing support
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Management and monitoring using JMX
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Active community
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Summary
2
2. Core Concepts
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2. Core Concepts
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Messages
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Exchange
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Camel context
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Processor
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Routes
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Channels
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Domain Specific Languages (DSL)
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Component, endpoint, producer, and consumer
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Data format
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Type converter
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Summary
3
3. Routing and Processors
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3. Routing and Processors
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What is a processor?
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An example of Camel routes containing processors
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Summary
4
4. Beans
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4. Beans
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Registry
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Creating CompositeRegistry
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Service activator
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Bean and method bindings
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Annotations
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Example – creating an OSGi bundle with a bean
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Building and deploying
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Summary
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5. Enterprise Integration Patterns
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5. Enterprise Integration Patterns
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EIP processors
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Messaging systems EIPs
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Messaging channels EIPs
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Message Construction EIPs
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Message Routing
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Message Transformation EIPs
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The Messaging Endpoints EIPs
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System Management EIPs
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Summary
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6. Components and Endpoints
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6. Components and Endpoints
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Components
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Endpoint
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A custom component example
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Summary
7
7. Error Handling
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7. Error Handling
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Types of errors
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Camel error handlers
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Error handlers scopes
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Error handler features
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Try, Catch, and Finally
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Summary
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8. Testing
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8. Testing
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Unit test approach with the Camel test kit
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A complete example
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Additional annotations
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Mocking OSGi services
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Summary
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Index
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Index

Message Transformation EIPs

These EIPs are extensions of the Message Translator EIP, and are dedicated to some special use cases.

The Content Enricher EIP

The Content Enricher EIP describes how to enrich the message with another system. For instance, the message contains an identifier, and you want to populate the data associated with this ID from a database.

To implement this EIP, you can use a bean or a processor as you do in the Message Translator EIP.

You can also use an endpoint that uses a transformation tool (such as Velocity, Xslt, and so on).

However, Camel provides two notations dedicated to content enrichment. They are as follows:

  • enrich uses a producer endpoint to retrieve the data and use an aggregation strategy (like in the Aggregator EIP) to merge the data. For instance, enrich is used to call a webservice or another direct endpoint.

  • pollEnrich, on the other hand, uses a consumer endpoint to poll the data and use an aggregation strategy to merge the data. For instance, pollEnrich...

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