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![Components
• URI format:
•
scheme:localPart[?options]
•
scheme: identifies the “component”
•
localPart: specific to the component
•
options: is a list of name-value pairs
• Creates endpoints based on configuration
• Route endpoint “factories”
• Integrate with Camel Routes by creating producer/
consumer endpoints
37](https://image.slidesharecdn.com/dcc-shortened-ceposta-enterprise-camel-final-131111103539-phpapp02/85/Solving-Enterprise-Integration-with-Apache-Camel-37-320.jpg)
![Another Example
public class MyExampleRouteBuilder extends RouteBuilder {
@Override
public void configure() throws Exception {
from(“aws-sqs://demo?defaultVisibilityTimeout=2”)
}
}
38
.setHeader(“type”).jsonpath(“$[‘type’]”)
.filter(simple(“${header.type} == ‘login’”)
.to(“jms:quote”);](https://image.slidesharecdn.com/dcc-shortened-ceposta-enterprise-camel-final-131111103539-phpapp02/85/Solving-Enterprise-Integration-with-Apache-Camel-38-320.jpg)
Uploaded byChristian Posta
Solving Enterprise Integration with Apache Camel
The document introduces Apache Camel, an open-source integration library designed to facilitate the integration of disparate systems through various protocols and data formats. It discusses the challenges of enterprise integration and highlights Apache Camel's features such as message routing, transformation, and the use of enterprise integration patterns (EIPs). The document also includes coding examples, lists of available components, and resources for further learning.
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Solving Enterprise Integration with Apache Camel
- 1. Solving Enterprise Integration With ApacheCamel Christian Posta Principal Consultant and Architect 11/09/13 1
- 2. Agenda • • • • • 2 What is Integration? Whatis Apache Camel Why Apache Camel? Example Questions?
- 3. Your speaker Christian Posta Blog:http://christianposta.com/blog Twitter: @christianposta Email: christian@redhat.com ceposta@apache.org • Principal Consultant and Architect at Red Hat (FuseSource) • Based in Phoenix, AZ • Committer on Apache Camel, ActiveMQ, Apollo • PMC on ActiveMQ • Author: Essential Camel Components DZone Refcard 3
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- 7. Just use onecomputer. No integration needed. 7
- 8. Why is integrationhard? • Off the shelf? Home Grown? Acquisition? • Platforms • Protocols / Data Formats • Data Formats • Timing • Organizational mismatch 8
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- 10.
- 11.
- 12. Extract the heartof ESB • Protocol mediation • Routing • Transformation • EIPs • Start small, build up • Open Source • Community driven 12
- 13. Patterns FTW! • Commonlanguage!!!!! • Specific context • Forces at work • Concrete solution • Guidance • Other patterns… • 65 patterns 13
- 14. What is ApacheCamel? 14 14
- 15. Proud parents ofCamel 15
- 16. Apache Camel Apache Camelis an open-source, light-weight, integration library. Use Camel to integrate disparate systems that speak different protocols and data formats 16
- 17. Why the nameCamel? • Can carry more weight that other beasts? • James fancied the cigarettes? • A horse designed by committee? 17 Concise Application Messaging Exchange Language
- 18. What is ApacheCamel? • Light-weight integration library • Enterprise Integration Patterns • Components • Domain Specific Language • Routing and Mediation (like an ESB?) • Runs in any container (or stand alone) 18
- 19. Not an ESB…per-se… • An integration library • • • Routing (content-based, dynamic, rules-engine…) Mediation (xformations, protocols, wire transports…) DSL • Can build an ESB (real ESB.. Not just box in the middle) • Many options based on Camel! • • • • 19 Fuse ESB / JBoss Fuse Apache ServiceMix (Karaf + Camel) Talend, wso2, others… Not tied to vendor lock-in and commercial licenses!
- 20.
- 21. Quick Example File System 21 MessageOriented Middleware
- 22.
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- 24.
- 25. Quick Example isWidget =xpath(“/quote/product = ‘widget’”); from(A) .filter(isWidget). to(B) 25
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- 27. Very popular • Usedat top companies in finance, shipping, retail/e-retail, health care, airline reservations, etc • FAA: http://fusesource.com/collateral/131 • Sabre: http://fusesource.com/collateral/139 • CERN: http://fusesource.com/collateral/103 27
- 28. Open source • ApacheSoftware Foundation • ASL v 2.0 Licensed • Vibrant community • • 28 Jira, mailing list, github Lots of contributions! Check out the components!
- 29. Pipes and Filters • Step by Step – “Processors” in Camel terminology • Complex processing – “Routes” • Flexible • Testing • Reuse 29
- 30. Camel Routes • Definedin Java, XML, Scala, Groovy • Step by step processing of a message: • Consumer – Listen for incoming message • Zero or more “filters” or Processors • Producer – Send outgoing message • Number of processing filters, or “Processors” in Camel-speak • EIPs • Tranform, redirect, enrich 30
- 31. Domain Specific Language • Domain specific (integration) • Used to build and describe Camel Routes • Embedded within a general programming language • Java, Spring XML, Scala, Groovy • Take advantage of existing tools • Fluent builders (builder pattern…) • 31 from(“..”).enrich(“…”).filter(“..”).to(“…”);
- 32. Java DSL public classOrderProcessorRouteBuilder extends RouteBuilder { @Override public void configure() throws Exception { from(“activemq:orders”) .choice() .when(header(“customer-rating”).isEqualTo(“gold”)) .to(“ibmmq:topic:specialCustomer”) .otherwise() .to(“ftp://user@host/orders/regularCustomers”) .end() .log(“received new order ${body.orderId}”) .to(“ibatis:storeOrder?statementType=Insert”); } } 32
- 33. Spring XML DSL <routeid=“processOrders”> <from uri=“activemq:orders”/> <choice> <when> <simple>${header.customer-rating} == ‘gold’</simple> <to uri=“ibmmq:topic:specialCustomer”> </when> <otherwise> <to uri=“ftp://user@host/orders/regularCustomers” /> </otherwise> </choice> <log message=“received new order ${body.orderId}”/> <to uri=“ibatis:storeOrder?statementType=Insert”/> </route> 33
- 34. Enterprise Integration Patterns • Message Routing • Transformation • Aggregation • Splitting • Resequencer • Routing Slip • Enricher • All from the book! 34
- 35. Components • Prepackaged bitsof code • Highly configurable • Maximum interoperability • Used to build “Adapters” to existing systems • Don’t reinvent the wheel and end up with a box 35
- 36. Components http://camel.apache.org/components.html • ActiveMQ, Websphere,Weblogic (JMS) • AMQP • HTTP • ATOM feeds • IRC • AWS (S3, SQS, SNS, others) • jclouds • Bean • JDBC • Cache (EHCache) • Jetty • CXF (JAX-WS, JAX-RS) • Twitter • EJB • MQTT • Drools • MyBatis • File • JPA • FTP • Spring Integration • Google App Engine 36 • GMail • Spring Web Services To see list of all components!!
- 37. Components • URI format: • scheme:localPart[?options] • scheme:identifies the “component” • localPart: specific to the component • options: is a list of name-value pairs • Creates endpoints based on configuration • Route endpoint “factories” • Integrate with Camel Routes by creating producer/ consumer endpoints 37
- 38. Another Example public classMyExampleRouteBuilder extends RouteBuilder { @Override public void configure() throws Exception { from(“aws-sqs://demo?defaultVisibilityTimeout=2”) } } 38 .setHeader(“type”).jsonpath(“$[‘type’]”) .filter(simple(“${header.type} == ‘login’”) .to(“jms:quote”);
- 39. Test Framework • Powerfulway to test your Camel routes • http://camel.apache.org/mock.html • Uses Mocks • Mocks vs Stubs? • http://martinfowler.com/articles/mocksArentStubs.html • Provides declarative testing mechanism • Declare • Test • Assert 39
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- 42. JBoss Fuse (akaFuse ESB) 42
- 43. JBoss Fuse (akaFuse ESB) 43
- 44. Live Demo can befound here: https://github.com/christian-posta/camel-sqs-example 44 44
- 45.
- 46. Dzone Refcardz REFCARDZ • CamelEssential Components • http://refcardz.dzone.com/refcardz/essential-camel-components • Essential EIP with Apache Camel • http://refcardz.dzone.com/refcardz/enterprise-integration 46
- 47. Apache Community • http://camel.apache.org • Mailing list: users@camel.apache.org • Nabble Archive: http://camel.465427.n5.nabble.com/Camel-Users-f465428.html • Source code: http://svn.apache.org/viewvc/camel/trunk/ • Blogs, Articles, Examples • http://camel.apache.org/articles.html • http://camel.apache.org/user-stories.html • http://camel.apache.org/user-stories.html • http://www.davsclaus.com • http://www.christianposta.com/blog 47
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