Downloaded 31 times
Uploaded byCharles Moulliard
MicroService and MicroContainer with Apache Camel
This document discusses designing a REST microservice using Apache Camel technology. It covers integrating systems using Camel, implementing enterprise integration patterns with Camel, using different Camel DSLs like Java, XML, and REST. It demonstrates running the Camel application as a microservice in a Docker container and deploying it on Kubernetes and OpenShift using Fabric8 tools.
More Related Content
Similar to MicroService and MicroContainer with Apache Camel
MicroService and MicroContainer with Apache Camel
- 1. Design a RESTMicroservice using Apache Camel technology Charles Moulliard (@cmoulliard) 22 Jan 2016
- 2. Who Committer, Coder, Architect Workon Apache Camel, Karaf, Fabric8, Hawtio, Apiman, DeltaSpike Mountain Biker, Belgian Beer Fan Blog: Twitter: Email: http://cmoulliard.github.io @cmoulliard cmoulliard@redhat.com
- 3. Agenda Integration … Apache Camel MicroContainer Kubernetes Service
- 4.
- 5. Point to Pointvision Integrate many systems. Play with formats & protocols
- 6. Hub Approach In 2003,it was reported that 70% of all EAI projects fail !
- 7. Bus Communication done througha Bus with Normalized messages
- 8. MicroService It is anarchitectural style where an application composed of individual standalone services communicating using lightweight protocols in event based manner
- 9.
- 10. Apache Camel Java IntegrationFramework Implements Domain Specific Language Supports Enterprise Integration Patterns
- 11. Enterprise Patterns implemented and more: Loadbalancer, Throttler, Delayer, … > 50 patterns
- 12. Route, processor Camel projectCollection of routes Route = Processor(s) + Interceptor(s) Producing or consuming Message
- 13. Java DSL Fluent API,extend RouteBuilder class importorg.apache.camel.builder.RouterBuilder; publicclassFilterRouteextendsRouteBuilder{ publicvoidconfigure()throwsException{ from("activemq:queue:all") .filter(xpath("/quote/product='widget'")) .to("activemq:widget"); } }
- 14. XML DSL Spring, Blueprint <?xmlversion="1.0"encoding="UTF-8"?> <beansxmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring- http://camel.apache.org/schema/springhttp://camel.apache.org/schema/spring/camel-spring.xsd "> <beanid="quotesService"class="my.cool.demo.camel.QuotesService"/>" <camelContextxmlns="http://camel.apache.org/schema/spring"> <route> <fromuri="activemq:queue:all"/> <filter> <xpath>"/quote/product/='widget"</xpath> <beanid="quotesService"method="widget"/> </filter> </route> </camelContext>
- 15. REST DSL One ofthe components available : servlet, jetty, netty, spark, restlet, undertow Hostname Port Root of the REST Application endpoint @Overridepublicvoidconfigure()throwsException{ restConfiguration() .component("servlet") .host(HOST) .setPort(PORT); //usetherestDSLtodefinetherestservices rest("/users/") .get("{id}/hello") .route() .process(newProcessor(){ publicvoidprocess(Exchangeexchange)throwsException{ Stringid=exchange.getIn().getHeader("id",String.class); exchange.getOut().setBody("Hello"+id+"!Welcomefrompod:" } }); 1 2 3 4 5 1 2 3 4
- 16.
- 17.
- 18.
- 19.
- 20. Docker Union FS mountedwith immutable images Benefits: portability, reusability, versioning, application-centric
- 21.
- 22.
- 23. Maven Docker Plugin docker:buildBuild image of app docker:push Push image <docker.from>fabric8/s2i-java:1.2</docker.from> <docker.image>${docker.registryPrefix}fabric8/${project.artifactId}:${project.version} <docker.port.container.jolokia>8778</docker.port.container.jolokia> <docker.registryPrefix>${env.DOCKER_REGISTRY}/</docker.registryPrefix> <plugin> <groupId>org.jolokia</groupId> <artifactId>docker-maven-plugin</artifactId> <version>${docker.maven.plugin.version}</version> <configuration> <images> <image> <name>${docker.image}</name> <build> <from>${docker.from}</from> <assembly> <basedir>/deployments</basedir> <descriptorRef>hawt-app</descriptorRef> </assembly> <env> <JAVA_LIB_DIR>/deployments/lib</JAVA_LIB_DIR> <JAVA_MAIN_CLASS>org.apache.camel.cdi.Main</JAVA_MAIN_CLASS> </env>
- 24.
- 25.
- 26.
- 27. Kubernetes Runtime & Operationalmanagement of containers ApiServer (event, status) Scheduler, Controller & State Storage Agent - Kubelet - manage containers on host Containers pods (= shared docker containers)
- 28.
- 29. Pod & docker Communicateto each other using skyDNS to resolve hostname
- 30. Pod & port Portscan be exposed
- 31. Pod & volume Sharedata using mounted volume between host & container
- 32. Kubernetes Service Kube Serviceloadbalanced through the pods using HA-Proxy Routes map private with public IP address
- 33.
- 34.
- 35. Fabric8 Maven Plugin fabric8:jsongenerates Kube MetaData fabric8:apply deploy on Openshift <fabric8.service.name>hellorest</fabric8.service.name> <fabric8.service.port>9090</fabric8.service.port> <fabric8.service.containerPort>8080</fabric8.service.containerPort> <fabric8.label.component>${project.artifactId}</fabric8.label.component> <fabric8.label.container>tomcat</fabric8.label.container> <fabric8.label.group>demo</fabric8.label.group> <fabric8.service.type>LoadBalancer</fabric8.service.type> <fabric8.iconRef>camel</fabric8.iconRef> <plugin> <groupId>io.fabric8</groupId> <artifactId>fabric8-maven-plugin</artifactId> <version>${fabric8.version}</version> <executions> <execution> <id>json</id> <goals> <goal>json</goal> </goals>
- 36. With OpenShift &Kubernetes
- 37.
- 38. Questions Twitter : Camel RestMicroService in Action @cmoulliard https://github.com/FuseByExample/microservice-camel-in-action http://fabric8.io/