Apache Camel Developer's Cookbook by Scott Cranton, Jakub Korab

By Scott Cranton, Jakub Korab

Apache Camel is a de-facto commonplace for constructing integrations in Java, and is predicated on well-understood firm Integration styles. it's used inside of many advertisement and open resource integration items. Camel makes universal integration initiatives effortless whereas nonetheless supplying the developer with the skill to customise the framework whilst the location calls for it. projects reminiscent of protocol mediation, message routing and transformation, and auditing are universal usages of Camel. Apache Camel Developer's Cookbook offers 1000s of most sensible perform suggestions for utilizing Apache Camel in a structure that is helping you construct your Camel tasks.

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Apache Camel Developer's Cookbook

Apache Camel is a de-facto normal for constructing integrations in Java, and is predicated on well-understood company Integration styles. it really is used inside of many advertisement and open resource integration items. Camel makes universal integration projects effortless whereas nonetheless delivering the developer with the capability to customise the framework whilst the location calls for it.

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There's more... The same component can be instantiated multiple times with different IDs. For example, two JMS components might be used when writing routing logic to bridge message brokers from different vendors. html Reusing routing logic by connecting routes It is frequently necessary to execute the same processing steps within multiple routes. Camel provides you with a mechanism to call routing steps in a shared route. You can then reuse that route in a similar fashion to a method in a regular Java program.

Endpoints are defined using URIs, such as in the preceding example, timer:logMessageTimer. The first part of the URI specifies the component that is being used to consume the message, and the remaining is a set of instructions for that specific component. See the Using Camel components recipe in this chapter for more details. The Camel routing engine consumes exchanges from these endpoints and processes them sequentially through each of the steps defined in the route. The engine is responsible for threading, transactions, error handling, copying messages where required, and many other details.

1. Split out the integration logic that you want to share into a route and select a VM Component to consume from that best suits your threading requirements. If your route should handle requests using the same thread as the caller, choose direct-vm:, otherwise if you want the exchange to be processed asynchronously by a different thread, choose vm:. Give the endpoint a name that will be unique across the JVM. ); 2. Invoke the shared route from within the top-level route that needs to make use of this logic by using the same URI prefix.

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