What this book covers

Chapter 1, Structuring Routes, introduces you to the fundamentals of structuring Camel integrations; getting the framework running inside Java and Spring applications, using Camel components, and breaking down and reusing routing logic.

Chapter 2, Message Routing, details the use of the main EIPs used to route messages within Camel integrations; everything from if-else style content-based routing to more complex, dynamic options.

Chapter 3, Routing to Your Code, describes how to interact with a Camel runtime from your Java code, and how your Java code can be used from within Camel routes.

Chapter 4, Transformation, provides some off-the-shelf strategies for converting between and manipulating common message formats such as Java objects, XML, JSON, and CSV.

Chapter 5, Splitting and Aggregating, takes a deep dive into the related Splitter and Aggregator EIPs. It details the impacts of completion conditions, parallel processing options, and using the EIPs in combination with each other.

Chapter 6, Parallel Processing, outlines Camel's support for scaling out processing through the use of thread pools, profiles, and asynchronous processors.

Chapter 7, Error Handling and Compensation, details the mechanisms provided by the Camel DSLs for dealing with failure, including capabilities for triggering compensating routing steps for non-transactional interactions that have already completed.

Chapter 8, Transactions and Idempotency, presents a number of variations for dealing with transactional resources (JDBC and JMS). It additionally details the handling of non-transactional resources (such as web services) in such a way that they will only ever be invoked once in the event of message replay or duplicates.

Chapter 9, Testing, outlines Camel's test support that allows you to verify your routes' behavior without the need for backend systems. It also presents ways to manipulate routes with additional steps for testing purposes, without altering the code used at runtime.

Chapter 10, Monitoring and Debugging, describes Camel's support for logging, tracing, and debugging. Monitoring is examined through Camel's support for JMX, which includes the ability to define your own attributes and operations.

Chapter 11, Security, covers encrypting communication between systems, hiding sensitive configuration information, non-repudiation using certificates, and applying authentication and authorization to your routes.

Chapter 12, Web Services, shows you how to use Camel to invoke, act as a backend to, and proxy SOAP web services.