Brainbit Camel - Rabobank 1 maart 2018

1. UseTest1
Probability of Default Microservice
RHD BrainBit, 01-03-2018
Bert Koorengevel –The Commitments
Und jetzt kommen die Kamele …

2. Agenda
• PDM – Enterprise Integration Patterns
• Wat is Apache Camel?
• Waarom gebruiken we Camel?
• Zijn er alternatieven?
• Hoe ziet een Camel project er uit?

3. PDM
Facility
Advanced
Data
Analytics
Special
Assessment
Management
Credit
Assessment
Suite
RRR
PDM – Probability of Default Microservice
Enriched
Facility
RRR

4. Patterns
• Design Patterns
• 23 stuks
• Enterprise Integration Patterns
• 65 stuks

5. Messaging Patterns

6. Und jetzt kommen die Kamele …
Apache Camel is:
• Open source lightweight Integration framework
• Library: .jar dependencies
camel-core.jar + .jar per component
• Gebaseerd op Enterprise Integration patterns
• Java,Groovy & Scala fluent DSL
• Versie 1.0 gepubliceerd in 2007, huidige versie: 2.20.3
• Integreert met Spring (-boot)
ApplicationContext  CamelContext
6

7. How do I get started with Apache Camel?
Apache Camel is easy,
just read this 912 page book ;)
Workshop van Ivo Woltring:
• https://github.com/Ordina-JTech/camel-workshop
Of deep-dive:
• http://camel.apache.org

8. Endpoint URI’s - Components
• http[s]://hostName[:port][/resourceUri][?options]
• bean:beanName[?options]
• consul:apiEndpoint[?options]
• direct:someName[?options]
• ejb:ejbName[?options]
• file://nameOfFileOrDirectory[?options]
• hipchat://[host][:port]?options
• jdbc:dataSourceName[?options]
• rest:verb:path[?options]
• validation:resourceName[?options]

9. Routes definieren tussen Endpoints
9
@Component
public class HelloRouteBuilder extends RouteBuilder {
@Override
public void configure() {
from("rest:get:hello:/{me}")
.transform().simple("Hi ${header.me}");
from("rest:post:hello")
.setHeader("subject", constant("Hello!"))
.to("smtp:admin@tempuri.com");
}
}

10. Exchange & Processor
• Exchange
• In(putMessage)
• Header
• Body
• Out(putMessage)
• Header
• Body
• Exception
• [tl;dr]
@Component
public class GetOrderProcessor implements Processor {
@Autowired CustomerOrderRepository repo;
public void process(Exchange exchg) {
Customer cust = exchg.getIn()
.getBody(Customer.class);
exchg.getOut()
.setBody(repo.findAll(cust.getId()));
}
}
@Autowired GetOrderProcessor getOrders
. . .
from("direct:getcustomerorders").process(getOrders);

11. VergelijkingCamel met Spring Integration

12. PDM – Camel kernel
from("direct:determine_pd")
.to("bean-validator:facility")
.log("Start PDM for facility id: ${body.facilityId}")
.to(MULTI_URI)
.log("--> CAS")
.to(CalculatePDClientAdapter.URI)
.log(" RRR = ${body.rabobankRiskRating}");
from(MULTI_URI)
.multicast(multiStrategy)
.stopOnException()
.parallelProcessing()
.to( AdaGetBehaviouralDataRoute.URI,
SamGetDpdInfoAdapter.URI,
SamGetFacilityDefaultStatusAdapter.URI)
.end();

13. PDM – SAM interconnection
@Value("${service.sam.getdpdinfourl}")
private String getDpdInfoUrl;
. . .
from(SamGetDpdInfoAdapter.URI)
.to(SamGetDpdInfoClient.URI)
.unmarshall().json(JsonLibrary.Jackson, DPDInfo.class);
from(SamGetDpdInfoClient.URI)
.setHeader(Exchange.HTTP_METHOD, constant(HttpMethods.GET))
.setHeader(Exchange.HTTP_URI, simple(getDpdInfoUrl))
.to("https4:get");

14. Testing Camel routes
14
@RunWith(CamelSpringRunner.class)
public class SamGetDpdInfoAdapterTest {
@Produce(uri=TEST_START) ProducerTemplate samDpdInfoProducer;
@EndpointInject(uri=MOCK_RESULT) MockEndpoint resultEndpoint;
@TestConfiguration
public static class TestConfig extends SingleRouteCamelConfiguration {
@Override public RouteBuilder route() {
return () -> {
from(TEST_START).to(SamGetDpdInfoAdapter.URI).to(MOCK_RESULT);
}
}
}
@Test
public void test() {
resultEndpoint.expectedMessageCount(1);
resultEndpoint.allMessages().body(DPDInfo.class).isNotNull();
Facility facility = new Facility(“123”);
samDpdInfoProducer.sendBody(facility);
resultEndpoint.assertIsSatisfied();
}
}

15. Vragen ?
Bedankt voor jullie aandacht!