Read e-book online Apache Camel Developer's Cookbook PDF

By Scott Cranton, Jakub Korab

ISBN-10: 1782170308

ISBN-13: 9781782170303

Apache Camel is a de-facto general for constructing integrations in Java, and is predicated on well-understood company Integration styles. it truly is used inside many advertisement and open resource integration items. Camel makes universal integration initiatives effortless whereas nonetheless supplying the developer with the capacity to customise the framework whilst the placement calls for it. initiatives corresponding to protocol mediation, message routing and transformation, and auditing are universal usages of Camel. Apache Camel Developer's Cookbook offers hundreds of thousands of top perform counsel for utilizing Apache Camel in a layout that is helping you construct your Camel tasks.

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Camel allows us to deal with this scenario by splitting the long-running part into a shared route, and linking the two routes with a seda: endpoint. info Chapter 1 SEDA is an acronym that stands for Staged Event-Driven Architecture. It is designed as a mechanism to regulate the flow between different phases of message processing. The idea is to smooth out the frequency of message output from an overall process so that it matches the input. In practical terms, it allows an endpoint's consumer threads to offload the work of long-running operations into the background, thereby freeing them up to consume messages from the transport.

Otherwise, the exchange is placed onto a named in-memory queue that will never be consumed from. Aside from working across applications, direct-vm: is functionally equivalent to direct:. The endpoint uses the same thread between the two applications, meaning that it can participate in the same transactions. This should be tested thoroughly to ensure that applications have been correctly configured. For this to work, both applications should make use of the same transactional resources (for example, JDBC DataSource or JMS ConnectionFactory) with the same transaction manager.

This recipe will show you a way to do that. Getting ready Define your desired routing logic as described in either the Using Camel in a Java application recipe, or the Embedding Camel in a Spring application recipe. How to do it... -- ... info Structuring Routes If using the Java DSL, simply define the URI as a String within RouteBuilder configure() method: String restfulOrdersService = "jetty:http://localhost:8080/orders"; from(restfulOrdersService) //... Reusing routing logic through template routes One of the key advantages of using Java for defining routes is the ability to define the same, or similar, routing logic multiple times in your integrations, while changing key elements.

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

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