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Introduction to Apache Camel
The document provides an overview of Apache Camel, an open-source integration framework based on enterprise integration patterns, and includes its basic functionalities and examples. It showcases various programming models such as Java, XML, and DSL configurations to illustrate how to build routes with Apache Camel. Additionally, it highlights some features, components, and tools available for using and testing Camel applications.
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Introduction to Apache Camel
- 1. Apache Camel The IntegrationLibrary Aarhus Denmark February 9th 2017
- 2. Claus Ibsen • SeniorPrincipal Software Engineer at Red Hat • Apache Camel 8 years full time • Author of Camel in Action books @davsclaus davsclaus davsclaus.com
- 3. Agenda • What isApache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • Running Camel • More Information
- 4. What is ApacheCamel? • Quote from the website Apache Camel is a powerful Open Source Integration Framework based on Enterprise Integration Patterns
- 5. What is ApacheCamel? • Quote from the website Apache Camel is a powerful Open Source Integration Framework based on Enterprise Integration Patterns
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- 10. Content Based Router fromnewOrder
- 11. Content Based Router fromnewOrder choice
- 12. Content Based Router fromnewOrder choice when isWidget to widget
- 13. Content Based Router fromnewOrder choice when isWidget to widget otherwise to gadget
- 14. Content Based Router from(newOrder) choice when(isWidget)to(widget) otherwise to(gadget)
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- 16. Content Based Router EndpointnewOrder = endpoint("activemq:queue:newOrder"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget);
- 17. Content Based Router EndpointnewOrder = endpoint("activemq:queue:newOrder"); Predicate isWidget = xpath("/order/product = 'widget'"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget);
- 18. Content Based Router EndpointnewOrder = endpoint("activemq:queue:newOrder"); Predicate isWidget = xpath("/order/product = 'widget'"); Endpoint widget = endpoint("activemq:queue:widget"); Endpoint gadget = endpoint("activemq:queue:gadget"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget);
- 19. Java Code public voidconfigure() throws Exception { Endpoint newOrder = endpoint("activemq:queue:newOrder"); Predicate isWidget = xpath("/order/product = 'widget'"); Endpoint widget = endpoint("activemq:queue:widget"); Endpoint gadget = endpoint("activemq:queue:gadget"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget); }
- 20. Java Code import org.apache.camel.Endpoint; importorg.apache.camel.Predicate; import org.apache.camel.builder.RouteBuilder; public class MyRoute extends RouteBuilder { public void configure() throws Exception { Endpoint newOrder = endpoint("activemq:queue:newOrder"); Predicate isWidget = xpath("/order/product = 'widget'"); Endpoint widget = endpoint("activemq:queue:widget"); Endpoint gadget = endpoint("activemq:queue:gadget"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget); } }
- 21. Java DSL import org.apache.camel.builder.RouteBuilder; publicclass MyRoute extends RouteBuilder { public void configure() throws Exception { from("activemq:queue:newOrder") .choice() .when(xpath("/order/product = 'widget'")) .to("activemq:queue:widget") .otherwise() .to("activemq:queue:gadget"); } }
- 22. XML DSL <route> <from uri="activemq:queue:newOrder"/> <choice> <when> <xpath>/order/product= 'widget'</xpath> <to uri="activemq:queue:widget"/> </when> <otherwise> <to uri="activemq:queue:gadget"/> </otherwise> </choice> </route>
- 23. Endpoint URIs <route> <from uri="file:inbox/orders"/> <choice> <when> <xpath>/order/product= 'widget'</xpath> <to uri="activemq:queue:widget"/> </when> <otherwise> <to uri="activemq:queue:gadget"/> </otherwise> </choice> </route> Use file instead
- 24. Endpoint URIs <route> <from uri="file:inbox/orders?delete=true"/> <choice> <when> <xpath>/order/product= 'widget'</xpath> <to uri="activemq:queue:widget"/> </when> <otherwise> <to uri="activemq:queue:gadget"/> </otherwise> </choice> </route> Parameters
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- 28. Components ahc bindy coapdocker ahc-ws blueprint cometd dozer apns boon context dropbox atmosphere box couchdb eclipse atom cache crypto ejb aws cassandraql csv elasticsearch bam castor cfx elsql bean-validator cdi cxf-transport eventadmin beanio chunk disruptor exec beanstalk cmis dns facebook
- 29. Components flatpack google-drive hbasejacksonxml fop google-mail hdfs jasypt freemarker gora hdfs2 javaspace ftp grape http jaxb gae groovy http4 jbpm ganglia gson ibatis jclouds geocoder guava-eventbus ical jcr git guice infinispan jdbc github hawtdb irc jetty8 google-calendar hazelcast jackson jetty9
- 30. Components jgroups jsonpath leveldbmustache jibx jt400 linkedin mvel jing juel lucene mybatis jira jxpath mail netty jms kafka metrics netty-http jmx kestrel mina netty4 jolt krati mina2 netty4-http josql kubernetes mongodb ognl jpa kura mqtt olingo2 jsch ldap msv openshift
- 31. Components optaplanner rabbitmq scalasmpp paho restlet schematron snpp paxlogging rmi scr soap pdf routebox script solr pgevent rss servlet spark-rest printer ruby servletlistener spring protobuf rx shiro spring-batch quartz salesforce sip spring-boot quarz2 sap-netweaver sjms spring-integration quickfix saxon slack spring-javaconfig
- 32. Components spring-ldap swagger undertowxmlsecurity spring-redis swagger-java univocity xmpp spring-security syslog urlrewrite xstream spring-ws tagsoup velocity yammer sql tarfile vertx zipfile ssh test weather zookeeper stax test-blueprint websocket stomp test-spring xmlbeans stream testng xmljson stringtemplate twitter xmlrpc
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- 40. Pop Quizz How longtime between the first and the latest release ?
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- 42. Agenda • What isApache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • Running Camel • More Information
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- 50. Agenda • What isApache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • Running Camel • More Information
- 51. Trying Camel • DownloadApache Camel 2.18.2 • tar xf apache-camel-2.18.2.tar.gz • cd apache-camel-2.18.2 • cd examples read readme.md first
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- 53. Run with webconsole mvn io.hawt:hawtio-maven-plugin:1.4.68:camel http://hawt.io/maven
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- 56. Agenda • What isApache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • More Information
- 57. What's in theCamel Box?
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- 59. Pipes and FiltersEIP from("file:inbox") .pipeline() .to("bean:decrypt") .to("bean:authenticate") .to("bean:de-dup");
- 60. Pipes and FiltersEIP from("file:inbox") .to("bean:decrypt") .to("bean:authenticate") .to("bean:de-dup"); pipeline is default mode so its nearly always omitted
- 61. Recipient List from("restlet:http://localhost:9080 /stocks/{symbol}?restletMethods=post") .recipientList(simple("activemq:queue:${header.symbol}")); curl -XPOST -d "40" "http://localhost:9080/stocks/ORCL"
- 62. Recipient List from("restlet:http://localhost:9080 /stocks/{symbol}?restletMethods=post") .recipientList(simple("activemq:queue:${header.symbol}")); curl -XPOST -d "40" "http://localhost:9080/stocks/ORCL"
- 63. Recipient List from("restlet:http://localhost:9080 /stocks/{symbol}?restletMethods=post") .toD("activemq:queue:${header.symbol}")); much easiernow with toD (to dynamic) curl -X POST -d "40" "http://localhost:9080/stocks/ORCL"
- 64. Recipient List restConfiguration().component("restlet").port(9080); rest("stocks") .post("{symbol}") .toD("activemq:queue:${header.symbol}")); and use rest-dsl curl-X POST -d "40" "http://localhost:9080/stocks/ORCL"
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- 70. Components ahc bindy coapdocker ahc-ws blueprint cometd dozer apns boon context dropbox atmosphere box couchdb eclipse atom cache crypto ejb aws cassandraql csv elasticsearch bam castor cfx elsql bean-validator cdi cxf-transport eventadmin beanio chunk disruptor exec beanstalk cmis dns facebook Number of Components: 218
- 71. Data Formats avro flatpackpgp univocity-fixed barcode gzip protobuf univocity-tsv base64 hl7 rss xmlBeans beanio ical secureXML xmjson bindy-csv jacksonxml serialization xmlrpc bindy-fixed jaxb soapjaxb xstream bindy-kvp jibx string zip boon json-gson syslog zipfile castor json-jackson tarfile crypto json-xstream tidyMarkup csv mime-multipart univocity-csv Number of Data Formats: 45
- 72. Data Format withJAXB • POJO class with @JAXB annotations
- 73. Data Format withJAXB • marshal (xml -> pojo) • unmarshal (pojo -> xml)
- 74. Languages bean header phpsql constant javaScript python terser el jsonpath ref tokenize exchange Proper ty jxpath ruby xpath file mvel simple xquery groovy ognl spel xtokenize Number of Languages: 24
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- 76. Language w/ Groovy hereyou can do groovy programming
- 77. Camel DSLs • JavaDSL • XML DSL (spring or OSGi blueprint) • Groovy DSL • Scala DSL Groovy and Scala are not much in use
- 78. ProducerTemplate • Client API(alike Spring Templates) Send a message to any Camel endpoint
- 79. ProducerTemplate • Client API(alike Spring Templates) FTP server Java Application How to upload a file to a FTP server from Java code
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- 82. Test Kit camel-test camel-test-blueprint camel-test-cdicamel-test-karaf camel-test-spring camel-testng
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- 86. camel-test 1) set expectations 2)send message(s)
- 87. camel-test 1) set expectations 2)send message(s) 3) assert
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- 89. • Reliable Shutdown GracefulShutdown Route A Route B Route C 2 1 3 4 5 6 Startup Shutdown Stop accept new messages Complete current inflight messages
- 90. Camel Commands • ApacheKaraf / ServiceMix / JBoss Fuse
- 91. Rest DSL use RESTverbs to define services that becomes Camel routes
- 92. Rest DSL configure REST andturn on swagger api
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- 94. Rest DSL swagger docas JSon schema
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- 100. Circuit Breaker • NetflixHystrix New in Camel 2.18
- 101. Circuit Breaker • Integrateswith Hystrix Dashboard
- 102. Maven Tooling • Archetypes camel-archetype-javacamel-archetype-component camel-archetype-spring camel-archetype-api-component camel-archetype-web camel-archetype-dataformat camel-archetype-cdi camel-archetype-spring-boot camel-archetype-scala camel-archetype-blueprint camel-archetype-groovy camel-archetype-spring-dm camel-archetype-scr camel-archetype-java8 New in Camel 2.18
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- 104. Maven Tooling • camel-maven-plugin mvncamel:validate Validate your Camel uris from the source New in Camel 2.19
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- 107. All the otherstuff Type Converter Transactions Interceptors Security Thread Management Route Policy Reactive Asynchronous Non-Blocking Routing Engine POJO Routing Debugging & Tracing
- 108. Agenda • What isApache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • Running Camel • More Information
- 109. Running Camel Standalone WebApplication Camel Spring XML JEE Application Camel Spring Boot Apache Karaf (OSGi) Camel CDI Wildfly (wildfly-camel) Camel Guice vert.x (vertx-camel)
- 110. More Information • Myblog • http://www.davsclaus.com • Apache Camel blogs & articles • http://camel.apache.org/articles • Camel videos • https://vimeo.com/tag:apachecamel • Best What is Camel article • https://dzone.com/articles/open-source- integration-apache And a lot more on youtube @davsclaus davsclaus davsclaus.com
- 111. The Camel Bible couponcode: camel39