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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

Components

The components are the main Camel extension point. Basically, a component is a factory of endpoints that you use in routes. If you take a look in the Component interface, you can see the following code:

public interface Component extends CamelContextAware {
   
   Endpoint createEndpoint(String uri) throws Exception;
   
   EndpointConfiguration createConfiguration(String uri) throws Exception;

   ComponentConfiguration createComponentConfiguration();

   boolean useRawUri();

}

You can see that a Component lives in the CamelContext (as it extends the CamelContextAware interface). This means that we instantiate a Component and add the instance in the CamelContext.

The Component is stored in the CamelContext using a unique identifier—the scheme. Later in the chapter, we will see that this schema is used to refer the Component in the route definition.

Bootstrapping a component

A component can be bootstrapped in two ways.

The first way is to explicitly instantiate the Component. You can...

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Mastering Apache Camel
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