Apache Camel - WJax 2008
Download as PPT, PDF2 likes756 views
Apache Camel is a lightweight framework for enterprise integration that implements many Enterprise Integration Patterns. It provides concepts like routes, endpoints, and components that can connect to different transports and protocols. Camel routes can be defined declaratively using XML or programmatically using a Java-based domain specific language. Camel supports over 40 components for integrating various systems and includes capabilities for message routing, transformation and system management.
![Expression Languages from("queue:a").filter( header("foo").isEqualTo("bar") ).to("queue:b"); Expression Language filter().el("${in.headers['My Header'] == 'bar'}") OGNL filter().ognl("request.headers.foo = 'bar'") Javascript filter().javaScript("request.headers.get('user') == 'admin'") Groovy filter().groovy("request.lineItems.any { i -> i.value > 100 }") Python filter().python("request.headers['user'] == 'admin'") Ruby filter().ruby("$request.headers['user'] == 'admin'") Xpath filter().xpath("//foo") Xquery filter().xquery("//foo") Scripting languages via JSR223](https://image.slidesharecdn.com/wjax-camel20081102-090819015521-phpapp02/85/Apache-Camel-WJax-2008-26-320.jpg)
Apache Camel - WJax 2008
- 1. Leichtgewichtige Enterprise-Integration mit Apache Camel Christian Meder | inovex GmbH
- 2. Agenda Warum Apache Camel ? Enterprise Integration Patterns Camel Konzepte DSL Beispiel Komponenten Möglichkeiten Fazit
- 3. Enterprise-Integration Enterprise Application Integration (EAI) Service Oriented Architecture (SOA) Webservices (WS-*) Enterprise Service Bus (ESB) Message Oriented Middleware (MOM) XML SOAP WSDL HTTP Binärformate JMS
- 4. Nur für Spezialisten ?
- 5. Apache Camel
- 6. Das Buch Gregor Hohpe, Bobby Woolf Enterprise Integration Patterns “ The Bible for Enterprise Application Integration” (amazon.com)
- 7. Cast
- 8. Messaging remove location dependencies data format dependencies temporal dependencies
- 9. Enterprise Integration Patterns 65 patterns Messaging Endpoints Message Construction Messaging Channels Message Routing Message Transformation System Management
- 10. Enterprise Integration Patterns (Basics) Channel Message Pipes and Filters Message Router Message Translator Message Endpoint
- 11. EIP (Routing/Transformation) Message Filter Splitter Aggregator Resequencer Content Enricher Content Filter Normalizer
- 12. Beispiel (VeS) Vollständig erfundenes Stammdatensystem
- 13. Apache Camel Wurzeln in servicemix-eip, activemq activemq, servicemix, cxf communities implementiert 40 EIP camel-core: commons-logging, jaxb, activation 1.3.0 April 2008 (208 tasks), 1.4.0 Juli 2008 (261 tasks), 1.5.0 Oktober 2008 (266 tasks) kommerzieller Support
- 14. Camel (Konzepte) CamelContext Component Endpoint Message/Exchange Processor RouteBuilder/Java DSL
- 15. CamelContext Spring: <camelContext id="camel" xmlns="http://activemq.apache.org/camel/schema/spring"> </camelContext> Pure Java: CamelContext camel = new DefaultCamelContext(); camelContext.start();
- 16. Component Spring: <bean id="activemq" class="org.apache.camel.component.jms.JmsComponent"> <property name="connectionFactory"> <bean class="org.apache.activemq.ActiveMQConnectionFactory"> <property name="brokerURL" value="vm://localhost?broker.persistent=false"/> </bean> </property> </bean> Pure Java: Component mailComponent = new org.apache.camel.component.mail.MailComponent();
- 17. Endpoint Spring: <cxf:cxfEndpoint id="routerEndpoint" address="http://localhost:9003/CamelContext/RouterPort" serviceClass="org.apache.hello_world_soap_http.GreeterImpl"/> URI: cxf:bean:routerEndpoint Pure Java: Endpoint endpoint = component.createEndpoint("log:com.mycompany.part2"); URI: log:com.mycompany.part2
- 18. Message/Exchange/Processor Pure Java: Exchange exchange = endpoint.createExchange(); exchange.getIn().setBody(name); public class MyProcessor implements Processor { public void process(Exchange exchange) throws Exception { // do something... } } Processor myProcessor = new MyProcessor();
- 19. RouteBuilder Spring: <camelContext xmlns="http://activemq.apache.org/camel/schema/spring"> <route> <from uri="activemq:Input"/> <bean ref="myBeanName" method="doTransform"/> <to uri="activemq:Output"/> </route> </camelContext>
- 20. RouteBuilder (Java DSL) Pure Java: from("activemq:Input").beanRef("myBeanName", "doTransform").to("activemq:Output"); RouteBuilder builder = new RouteBuilder() { public void configure() { from("queue:a").filter(header("foo").isEqualTo("bar")).to("queue:b"); from("queue:c").choice() .when(header("foo").isEqualTo("bar")).to("queue:d") .when(header("foo").isEqualTo("cheese")).to("queue:e") .otherwise().to("queue:f"); } }; myCamelContext.addRoutes(builder);
- 21. RouteBuilder (Scala DSL beta) class MyRouteBuilder extends RouteBuilder { "direct:a" --> "mock:a" "direct:b" to "mock:b" }
- 22. VeS (Splitter) <camelContext id="camel" xmlns="http://activemq.apache.org/camel/schema/spring"> <route> <from uri="cxf:requests"/> <splitter> <xpath>/login | /account</xpath> <to uri="direct:splitrequest"/> </splitter> </route> </camelContext>
- 23. VeS (Router) RouteBuilder builder = new RouteBuilder() { public void configure() { from("direct:splitrequest").choice().when(xpath("/login")).to("seda:loginData") .when(xpath("/account")).to("seda:accountData"); } };
- 24. VeS (2. Router) RouteBuilder builder = new RouteBuilder() { public void configure() { from("seda:accountData").choice().when(groovy(“request.account.id =~ /A.*/”)) .to("seda:oldAccountData") .when(groovy("request.account.id =~ /B.*/")).to("seda:newAccountData"); } };
- 25. VeS (Transformation) <route> <from uri="seda:loginData"/> <bean ref="loginBackend" method="doTransform"/> <to uri="seda:loginBackend"/> </route>
- 26. Expression Languages from("queue:a").filter( header("foo").isEqualTo("bar") ).to("queue:b"); Expression Language filter().el("${in.headers['My Header'] == 'bar'}") OGNL filter().ognl("request.headers.foo = 'bar'") Javascript filter().javaScript("request.headers.get('user') == 'admin'") Groovy filter().groovy("request.lineItems.any { i -> i.value > 100 }") Python filter().python("request.headers['user'] == 'admin'") Ruby filter().ruby("$request.headers['user'] == 'admin'") Xpath filter().xpath("//foo") Xquery filter().xquery("//foo") Scripting languages via JSR223
- 27. Components ActiveMQ (activemq:FOO.BAR) Atom (atom://atomUri) CXF (cxf:bean:cxfEndpoint) Spring events (spring-event://default) File ( file://inputdir/?delete=true ) Financial Information eXchange (fix://configurationResource)
- 28. Components Flatpack (flatpack:fixed:foo.pzmap.xml) FTP (ftp://camelrider@localhost:21/public/downloads) HL7 (Health Level 7) HTTP/Jetty JBI (jbi:service:http://foo.bar.org/Service) Java Content Repository (jcr://user:pass@repository/repo)
- 29. Components JMS (jms:FOO.BAR) JPA (jpa:account) LDAP (ldap:localhost:1024) Log (log:org.camel.example.Foo) Mail (imap://admin@mymailserver.com) Mina (mina:tcp://localhost:6200?textline=true) Mock (mock:foo) RMI (rmi://localhost:1099/foo)
- 30. Components Seda (seda:start) Smooks (EDI parsing) Test (test:file://data/expectedOutput) Timer (timer://foo?fixedRate=true&period=60000) Velocity (velocity:com/acme/MyResponse.vm) Vm (vm:foo) Xmpp (xmpp://fromAlias/toAlias)
- 31. Möglichkeiten BAM (Wiretap Pattern) Bean Integration Visualisierung Komponenten- erstellung
- 32. Fazit Apache Camel ist klein leicht fokussiert modular Don't get the hump, try Camel today.
- 33. Credits the camel riders IBM System 360 (CC cote on flickr) the camel's way (CC lovelypetal on flickr)