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Apache Camel Introduction & What's in the box
Apache Camel is an open-source integration framework designed to facilitate the implementation of enterprise integration patterns. The document outlines its core functionalities, provides examples of routing messages, and explains various components, DSL options, and how to set up and run Camel in different environments. Additionally, it highlights resources for further information and examples for beginners to get started with Apache Camel.
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Similar to Apache Camel Introduction & What's in the box
Apache Camel Introduction & What's in the box
- 1. Apache Camel Introduction & What's inthe box Claus Ibsen @davsclaus
- 2. Claus Ibsen • PrincipalSoftware Engineer at Red Hat • Apache Camel • 8 years working with Camel • Author of Camel in Action books @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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- 31. 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
- 32. 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
- 33. 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
- 34. 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
- 35. 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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- 41. Agenda • What isApache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • Running Camel • More Information
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- 49. Agenda • What isApache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • Running Camel • More Information
- 50. Trying Camel • DownloadApache Camel 2.16.2 • tar xf apache-camel-2.16.2.tar.gz • cd apache-camel-2.16.2 • cd examples read readme.md first
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- 52. Run with webconsole mvn io.hawt:hawtio-maven-plugin:1.4.60:camel http://hawt.io/maven
- 53. Widget & GadgetExample • camel-example-widget-gadget-xml bin/activemq console mvn exec:java There is a Java example also Requires ActiveMQ running
- 54. Agenda • What isApache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • More Information
- 55. What's in theCamel Box?
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- 57. Pipes and FiltersEIP from("file:inbox") .pipeline() .to("bean:decrypt") .to("bean:authenticate") .to("bean:de-dup");
- 58. 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
- 59. Recipient List from("reslet:http://localhost:9080 /stocks/{symbol}?restletMethods=post") .recipientList(simple("activemq:queue:${header.symbol}")); curl -XPOST -d "120" "http://localhost:9080/stock/ORCL"
- 60. Recipient List from("reslet:http://localhost:9080 /stocks/{symbol}?restletMethods=post") .recipientList(simple("activemq:queue:${header.symbol}")); curl -XPOST -d "120" "http://localhost:9080/stock/ORCL"
- 61. Recipient List from("reslet:http://localhost:9080 /stocks/{symbol}?restletMethods=post") .toD("activemq:queue:${header.symbol}")); much easiernow with toD (to dynamic) curl -X POST -d "120" "http://localhost:9080/stock/ORCL"
- 62. Recipient List restConfiguration().component("restlet").port(9080); rest("stocks") .post("{symbol}") .toD("activemq:queue:${header.symbol}")); and use rest-dsl curl-X POST -d "120" "http://localhost:9080/stock/ORCL"
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- 68. 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 camel-catalog:component-list | wc -l 207
- 69. 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 camel-catalog:dataformat-list | wc -l 41
- 70. Data Format withJAXB • POJO class with @JAXB annotations
- 71. Data Format withJAXB • marshal (xml -> pojo) • unmarshal (pojo -> xml)
- 72. Languages bean header phpsql constant javaScript python terser el jsonpath ref tokenize exchange Property jxpath ruby xpath file mvel simple xquery groovy ognl spel xtokenize camel-catalog:language-list | wc -l 24
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- 74. Language w/ Groovy hereyou can do groovy programming
- 75. Camel DSLs • JavaDSL • XML DSL (spring or OSGi blueprint) • Groovy DSL • Scala DSL Groovy and Scala are not much in use
- 76. Type Converters DefaultTypeConverter INFO Loaded183 type converters
- 77. Type Converters • Camelprovides type converters for most common types in Java hawtio can list the converters
- 78. Type Converters explicit type conversion usingconvertBodyTo
- 79. Type Converters implicit type conversion Camelwill automatic convert from java.io.File to String
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- 81. Property Placeholders • Externalizeconfiguration myapp.properties hi=Hello port=9090 myQueueName=greeting
- 82. • Camel PropertyPlaceholder PropertyPlaceholders
- 83. Property Placeholders • Bridgewith Spring Property Placeholder Spring: ${xxx} Camel: {{xxx}}
- 84. ProducerTemplate • Client API(alike Spring Templates) Send a message to any Camel endpoint
- 85. 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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- 87. Test Kit camel-test camel-test-blueprint camel-test-springcamel-testng camel-test-cdi in the works
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- 89. camel-test easy to runor debug
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- 91. camel-test 1) set expectations 2)send message(s)
- 92. camel-test 1) set expectations 2)send message(s) 3) assert
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- 94. Testing 'Production' Routes howto test route without any mock endpoints ?
- 95. MockAndSkip mock and skipsending to the target endpoint TIP you can also use wildcards and not skip mock: added as prefix
- 96. AdviceWith enable adviceWith add mock endpointlast start Camel after adviceWith
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- 99. NotifyBuilder 1) set expectations 2)send message(s) 3) assert
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- 101. Management • REST (w/Jolokia) jolokia/exec/ org.apache.camel:context=camel,type=context, name="camel"/dumpRoutesAsXml()
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- 104. • Control Bus Management tostop a route from a route
- 105. Inflight Repository • Trackmessages during routing
- 106. • 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
- 107. Camel Commands • ApacheKaraf / JBoss Fuse
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- 110. Rest DSL use RESTverbs to define services that becomes Camel routes
- 111. Rest DSL configure REST andturn on swagger api
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- 113. Rest DSL swagger docas json schema
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- 119. 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
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- 121. Maven Tooling • fabric8-camel-maven-plugin mvnfabric8-camel:validate http://fabric8.io/guide/camelMavenPlugin.html Validate your Camel uris from the source
- 122. All the otherstuff • Transactions • Interceptors • Security • Thread Management • Route Policy • Reactive Asynchronous Routing Engine • POJO Routing • Debugging and Tracing
- 123. Agenda • What isApache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • Running Camel • More Information
- 124. 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)
- 125. Running Camel Just needa Java Runtime
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- 127. More Information • Myblog • http://www.davsclaus.com • Apache Camel 3rd party blogs/articles/etc • 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 • Free chapter 1 covers Camel concepts to learn • http://manning.com/ibsen/chapter1sample.pdf @davsclaus davsclaus.com