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![Recipient list
<route id="notifyRoute">
<from uri="seda:notify"/>
<recipientList>
<simple>http4://${property.AppUrlNotif}</simple>
</recipientList>
[...]
</route>
from("direct:a")
.recipientList(
header("myHeader", "; "))
.parallelProcessing();
26](https://image.slidesharecdn.com/tjugcamel-181217095828/85/Toulouse-Java-User-Group-26-320.jpg)
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Toulouse Java User Group
- 1. Emmanuel Vinel Toulouse JavaUser Group December 11, 2018 1 Apache Camel
- 2. About me • EmmanuelVinel • Freelance • @EmmanuelVinel 2
- 3. Connected • Business • Legal •Technical Client 1 Service 3 Service 1 Service NService 2 App 4Client/service 2 3
- 4.
- 5. Enterprise Service Bus 5 Client1 Service 3 Service 1 Service NService 2 Client/service 2
- 6. Enterprise Service Bus •Routes • Transformation • Error management • Governance • Security • Repository • Loose coupling • Re-use • Version 6
- 7.
- 8.
- 9. 9 Ibsen, Claus; Anstey,Jonathan (2010), Camel in Action , Manning Publications,
- 10. Community rock ! ImplementationEIP More than 200 components 10
- 11.
- 12. Camel in ActionBook 12
- 13. Getting Started Spring bootcamel-archetype-spring-boot CDI camel-archetype-cdi Java camel-archetype-java web camel-archetype-web mvn archetype:generate -DarchetypeGroupId=org.apache.camel.archetypes -DarchetypeArtifactId=camel-archetype-spring-boot 13
- 14.
- 15. Exchange Exchange ID Message ExchangePattern Exception Properties In Message Out Message 15
- 16.
- 17. Processor @Component public class UpperCaseProcessorimplements Processor { public void process(Exchange exchange) throws Exception { Message inMessage = exchange.getIn(); String stringMessage = inMessage.getBody(String.class); exchange.getOut().setBody(stringMessage.toUpperCase()); } } 17
- 18. Processor <beans ...> <routeContext id="cssbContext"xmlns="http://camel.apache.org/schema/spring"> <route id="clientServiceAToClientServiceB"> <!-- receive Message Rabbit MQ --> <from uri="rabbitmq:{{serviceAqueue}}"/> <!-- Transform --> <process ref="upperCaseProcessor"/> <to uri="rabbitmq:{{other}}"/> </route> .... </ routeContext> ... </ beans > 18
- 19. Bean @Component public class UpperCaseService{ public void toUpperCase(Exchange exchange) throws Exception { Message inMessage = exchange.getIn(); String stringMessage = inMessage.getBody(String.class); exchange.getOut().setBody(stringMessage.toUpperCase()); } } @Override public void configure() { from("timer:hello?period={{timer.period}}").routeId("hello") .setBody().simple("hello world") .bean(UpperCaseService.class) .to("stream:out"); } 19
- 20. Component Enterprise • File SQL/JPA MongoDB KAFKA RabbitMQ HDFS JBPM LDAP SAAS • Facebook Twitter LinkedIn SalesForce SAP GoogleDrive GitHub CLOUD •AWS Google Azure IoT • MQTT PubNub CoAP Ops • •K8s •Zipkins •Docker •Openshift •… Format • AVRO CSV Base64 JSON JAXB Protobuf XML 20
- 21.
- 22.
- 23.
- 24. Content Base 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) .end(); 24
- 25. Publish/subscribe Enpoint • JMS • AmzonSNS/SQS • Amqp • Mqtt • Multicast • Redis • Hazelcast • Xmpp • SEDA • Google -PubSub • ... 25
- 26. Recipient list <route id="notifyRoute"> <fromuri="seda:notify"/> <recipientList> <simple>http4://${property.AppUrlNotif}</simple> </recipientList> [...] </route> from("direct:a") .recipientList( header("myHeader", "; ")) .parallelProcessing(); 26
- 27. Splitter from("file:inbox") .split().tokenize("n").streaming() .to("activemq:queue:order"); <route> <from uri="file:inbox"/> <split streaming="true"> <tokenizetoken="n"/> <to uri="activemq:queue:order"/> </split> </route> 27
- 28.
- 29. History File transfert Shared database RPC EAI Message BrokerCorba SOA, ESB Microservices 29
- 30.
- 31. MS-1 MS-3MS-2 Gw Service registry Configserver Service discovery Configuration Securité Logging Metriques Tracing Fault Tolerance Scaling Gateway 31 Tracing server
- 32. With Camel 32 MS-1 MS-3MS-2 Gw Serviceregistry Config server Service call EIP Tracing server
- 33.
- 34.
- 35.
- 36.
- 37.
- 38. Camel 38 from("timer:trigger?period=1s") .hystrix() .to("http://localhost:9090/service1") // onFallback() immediateresponse // use onFallbackViaNetwork() other response .onFallbackViaNetwork() .to("direct:inform-service") .end();
- 39.
- 40.
- 41.
- 42.
- 43.
- 44.
- 45.
- 46. SAGA A Long livedtransactions (LLTs) is a saga if it can be written as a sequence of transactions that can be interleaved with other transactions. The database management system guarantees that either all the transactions in a saga are successfully completed or compensating transactions are run to amend a partial execution we only discuss sagas in a centralized system, although clearly they can be implemented in a distributed database system. 46
- 47.
- 48.
- 49. SAGA with Camel from("direct:buy") .saga()//start saga .to("direct:rentCar") .to("direct:bookHotel") .to("direct:bookFlight"); car hotel Flight 49
- 50. SAGA with Camel from("direct:buy") .saga()//start saga .to("direct:rentCar") .to("direct:bookHotel") .to("direct:bookFlight"); car hotel Flight from("direct:rentCar") .saga() .propagation(SagaPropagation.MANDATORY) .compensation("direct:cancelRentCar") .bean(rentCarService, "rentCar") .log("Car reserved ${header.vehicle.icense_plate}"); 50
- 51. SAGA with Camel from("direct:buy") .saga()//start saga .to("direct:rentCar") .to("direct:bookHotel") .to("direct:bookFlight"); car hotel Flight from("direct:rentCar") .saga() .propagation(SagaPropagation.MANDATORY) .compensation("direct:cancelRentCar") .bean(rentCarService, "rentCar") .log("Car reserved ${header.vehicle.icense_plate}"); // action from("direct:cancelRentCar") .saga() .bean(rentCarService, "cancelRentCar") .log("${header.vehicle.icense_plate}"); 51
- 52. Conclusions ESB is dead,long live ESB Apache Camel Rock ! Connect everything Microservices 52
- 53.
- 54. Refs • GOTO 2015• Applying the Saga Pattern • Caitie McCaffrey • https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf • https://www.nicolaferraro.me/2018/04/25/saga-pattern-in-apache- camel/ • https://github.com/apache/camel/tree/master/camel- core/src/main/docs/eips • https://fr.slideshare.net/davsclaus/getting-started-with-apache-camel • 54