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Tag Archives: Apache Camel

From inside the code: Camel Routing Engine Part I

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So I’ve recently re-kindled my interest in how Apache Camel works. Camel is such a powerful integration tool and is very widely used, but anytime I put it to work, I can’t help but think “well, how the hell does it do all that!!” … guess I just have knack for not just accepting that it’s wonderful.. I want to ...

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Introduction to Apache Camel

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Apache Camel is a open source implementation of famous Enterprise Integration Patterns.   Camel is a Routing and Mediation Engine and facilitates the developers to create routes and mediation rules in variety of Domain Specific language(DSL) such as java, Spring/XML, scala etc. Camel is versatile Camel uses URIs to supports large number of transport and messaging models such as HTTP, JMS, ...

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Transactional caching for Camel with Infinispan

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Some time ago I created a Redis connector for Camel. Redis is awesome key-value store (and a lot more) but then I needed a cache running in the same JVM as Camel and noticed Infinispan which has just switched to ASL v2. There are already other connectors in Camel for caching on the JVM, like Hazelcast and EHCache, but if ...

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Publish/Subscribe Pattern with Apache Camel

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Publish/Subscribe is a simple messaging pattern where a publisher sends messages to a channel without the knowledge of who is going to receive them. Then it is the responsibility of the channel to deliver a copy of the messages to each subscriber. This messaging model enables creation of loosely coupled and scalable systems.             It ...

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Apache Camel 2.11 released

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Last week Apache Camel 2.11 was released. This blog post is a summary of the most noticeable new features and improvements. For a detailed description, see the Camel 2.11 release notes. 1) New components As usual each new release contains a number of new components, contributed by our large user base. Thanks guys. For example there is camel-cmis which allows ...

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Drools decision tables with Camel and Spring

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As I’ve shown it in my previous post JBoss Drools are a very useful rules engine. The only problem is that creating the rules in the Rule language might be pretty complicated for a non-technical person. That’s why one can provide an easy way for creating business rules – decision tables created in a spreadsheet! In the following example I ...

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REST with Apache Camel

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There are many ways to expose an HTTP endpoint in Camel: jetty, tomcat, servlet, cxfrs and restlet. Two of these components – cxfrs and restlet also support REST semantics just with few lines of code. This simple example demonstrates how to do CRUD operations with camel-restlet and camel-jdbc. The four HTTP verbs execute different operations and map to the following ...

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Indexing data in Solr from disparate sources using Camel

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Apache Solr is ‘the popular, blazing fast open source enterprise search platform’ built on top of Lucene. In order to do a search (and find results) there is the initial requirement of data ingestion usually from disparate sources like content management systems, relational databases, legacy systems, you name it… Then there is also the challenge of keeping the index up ...

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Apache Camel meets Redis

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The Lamborghini of Key-Value stores Camel is the best of bread Integration framework and in this post I’m going to show you how to make it even more powerful by leveraging another great project – Redis. Camel 2.11 is on its way to be released soon with lots of new features, bug fixes and components. Couple of these new components ...

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Hello Camel: Automatic File Transfer

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Apache Camel is described on its main web page (and in the Camel User Guide) as ‘a versatile open-source integration framework based on known Enterprise Integration Patterns.’ The Camel framework is based on the book Enterprise Integration Patterns and provides implementations of the patterns described in that book. I look at a ‘Hello World’ type example of using Camel in ...

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