Apache Camel Introduction & What's in the box
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Slides from JavaBin talk in Grimstad Norway, presented by Claus Ibsen in February 2016. This slide deck is full up to date with latest Apache Camel 2.16.2 release and includes additional slides to present many of the features that Apache Camel provides out of the box.
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Apache Camel Introduction & What's in the box
- 1. Apache Camel Introduction & What's in the box Claus Ibsen @davsclaus
- 2. Claus Ibsen • Principal Software Engineer at Red Hat • Apache Camel • 8 years working with Camel • Author of Camel in Action books @davsclaus davsclaus.com
- 3. Agenda • What is Apache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • Running Camel • More Information
- 4. What is Apache Camel? • Quote from the website Apache Camel is a powerful Open Source Integration Framework based on Enterprise Integration Patterns
- 5. What is Apache Camel? • Quote from the website Apache Camel is a powerful Open Source Integration Framework based on Enterprise Integration Patterns
- 10. Content Based Router from newOrder
- 11. Content Based Router from newOrder choice
- 12. Content Based Router from newOrder choice when isWidget to widget
- 13. Content Based Router from newOrder choice when isWidget to widget otherwise to gadget
- 14. Content Based Router from(newOrder) choice when(isWidget) to(widget) otherwise to(gadget)
- 15. Content Based Router from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget);
- 16. Content Based Router Endpoint newOrder = endpoint("activemq:queue:newOrder"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget);
- 17. Content Based Router Endpoint newOrder = endpoint("activemq:queue:newOrder"); Predicate isWidget = xpath("/order/product = 'widget'"); from(newOrder) .choice() .when(isWidget).to(widget) .otherwise().to(gadget);
- 18. Content Based Router 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);
- 19. Java Code 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); }
- 20. Java Code import org.apache.camel.Endpoint; import org.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; public class 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
- 25. Just Java Code
- 27. Just XML
- 30. Architecture
- 31. Components ahc bindy coap docker 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 hbase jacksonxml 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 leveldb mustache 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 scala smpp 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 undertow xmlsecurity 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
- 37. +
- 38. + +
- 39. + + +
- 40. + + + =
- 41. Agenda • What is Apache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • Running Camel • More Information
- 43. Public Static Void Main
- 45. Add RouteBuilder
- 46. Java DSL
- 47. Start / Stop
- 48. Camel Main
- 49. Agenda • What is Apache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • Running Camel • More Information
- 50. Trying Camel • Download Apache 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
- 51. Beginner Example • camel-example-console mvn camel:run
- 52. Run with web console mvn io.hawt:hawtio-maven-plugin:1.4.60:camel http://hawt.io/maven
- 53. Widget & Gadget Example • camel-example-widget-gadget-xml bin/activemq console mvn exec:java There is a Java example also Requires ActiveMQ running
- 54. Agenda • What is Apache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • More Information
- 55. What's in the Camel Box?
- 57. Pipes and Filters EIP from("file:inbox") .pipeline() .to("bean:decrypt") .to("bean:authenticate") .to("bean:de-dup");
- 58. Pipes and Filters EIP 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:${header.symbol}")); curl -X POST -d "120" "http://localhost:9080/stock/ORCL"
- 60. Recipient List from("reslet:http://localhost:9080 /stocks/{symbol}?restletMethods=post") .recipientList(simple("activemq:queue:${header.symbol}")); curl -X POST -d "120" "http://localhost:9080/stock/ORCL"
- 61. Recipient List from("reslet:http://localhost:9080 /stocks/{symbol}?restletMethods=post") .toD("activemq:queue:${header.symbol}")); much easier now with toD (to dynamic) curl -X POST -d "120" "http://localhost:9080/stock/ORCL"
- 62. Recipient List restConfiguration().component("restlet").port(9080); rest("stocks") .post("{symbol}") .toD("activemq:queue:${header.symbol}")); and use rest-dsl curl -X POST -d "120" "http://localhost:9080/stock/ORCL"
- 63. Splitter
- 66. Splitter from("file:inbox") .split(body().tokenize("n")) .marshal(customToXml) Custom Data Format
- 68. Components ahc bindy coap docker 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 flatpack pgp 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 with JAXB • POJO class with @JAXB annotations
- 71. Data Format with JAXB • marshal (xml -> pojo) • unmarshal (pojo -> xml)
- 72. Languages bean header php sql 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
- 74. Language w/ Groovy here you can do groovy programming
- 75. Camel DSLs • Java DSL • XML DSL (spring or OSGi blueprint) • Groovy DSL • Scala DSL Groovy and Scala are not much in use
- 76. Type Converters DefaultTypeConverter INFO Loaded 183 type converters
- 77. Type Converters • Camel provides type converters for most common types in Java hawtio can list the converters
- 78. Type Converters explicit type conversion using convertBodyTo
- 79. Type Converters implicit type conversion Camel will automatic convert from java.io.File to String
- 81. Property Placeholders • Externalize configuration myapp.properties hi=Hello port=9090 myQueueName=greeting
- 82. • Camel PropertyPlaceholder Property Placeholders
- 83. Property Placeholders • Bridge with 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
- 87. Test Kit camel-test camel-test-blueprint camel-test-spring camel-testng camel-test-cdi in the works
- 88. camel-test
- 89. camel-test easy to run or debug
- 91. camel-test 1) set expectations 2) send message(s)
- 92. camel-test 1) set expectations 2) send message(s) 3) assert
- 94. Testing 'Production' Routes how to test route without any mock endpoints ?
- 95. MockAndSkip mock and skip sending to the target endpoint TIP you can also use wildcards and not skip mock: added as prefix
- 96. AdviceWith enable adviceWith add mock endpoint last start Camel after adviceWith
- 98. NotifyBuilder
- 99. NotifyBuilder 1) set expectations 2) send message(s) 3) assert
- 100. Management • JMX
- 101. Management • REST (w/ Jolokia) jolokia/exec/ org.apache.camel:context=camel,type=context, name="camel"/dumpRoutesAsXml()
- 104. • Control Bus Management to stop a route from a route
- 105. Inflight Repository • Track messages during routing
- 106. • Reliable Shutdown Graceful Shutdown 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 • Apache Karaf / JBoss Fuse
- 108. Camel Commands • Spring Boot
- 110. Rest DSL use REST verbs to define services that becomes Camel routes
- 111. Rest DSL configure REST and turn on swagger api
- 112. Rest DSL cd examples/camel-example-swagger-java mvn jetty:run
- 113. Rest DSL swagger doc as json schema
- 115. Error Handling
- 116. Error Handling
- 117. Error Handling
- 118. Error Handling
- 119. Maven Tooling • Archetypes camel-archetype-java camel-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
- 120. Maven Tooling • camel-maven-plugin mvn camel:run
- 121. Maven Tooling • fabric8-camel-maven-plugin mvn fabric8-camel:validate http://fabric8.io/guide/camelMavenPlugin.html Validate your Camel uris from the source
- 122. All the other stuff • Transactions • Interceptors • Security • Thread Management • Route Policy • Reactive Asynchronous Routing Engine • POJO Routing • Debugging and Tracing
- 123. Agenda • What is Apache Camel? • Little Example • Trying Apache Camel • What's in the Camel Box? • Running Camel • More Information
- 124. Running Camel Standalone Web Application 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 need a Java Runtime
- 126. Running Camel
- 127. More Information • My blog • 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