![Building Event-driven App with Kafka
The Kafka connector adds support for Kafka to Reactive
Messaging.
• is based on the Vert.x Kafka Client
• name is: smallrye-kafka
• to indicate a channelmp.messaging.[outgoing|incoming].{channel-name}.property=value](https://image.slidesharecdn.com/jcconf2020-building-cloud-native-applications-with-quarkus-201115153754/85/JCConf-tw-2020-Building-cloud-native-applications-with-Quarkus-23-320.jpg)
JCConf.tw 2020 - Building cloud-native applications with Quarkus
- 2. About Me Rich Lee • Integration Architect at Cathay Financial Holdings • Microservices • Event-driven • Cloud Native App Development • Kafka & Event-driven consultant rich04230@gmail.com RICH0423 @rich04230
- 3. The Evolution Of Application Architecture Monolith Cloud-Native Microservices Serverless Event-driven Autonomy / Scale
- 4. The Evolution Of Deployment https://quarkus.io/blog/quarkus-for-spring-developers/
- 5. Quarkus is a Kubernetes-native Java framework introduced by Red Hat in 2019. QUARKUS Supersonic Subatomic Java
- 6. Why Quarkus? • How to get streaming data https://quarkus.io/assets/images/quarkus_metrics_graphic_bootmem_wide.png
- 7. What it is? Quarkus is a Kubernetes-native Java framework introduced by Red Hat in 2019. • Container First • Cloud Native • Kubernetes Native
- 8. Best of Breed Frameworks & Standards
- 9. Developer Joy • Based on standards, but not limited • Zero config & live reload • Unified configuration • No hassle native executable generation
- 12. Demo - Quarkus DataSource Database kind JDBC driver XA driver db2 com.ibm.db2.jcc.DBDriver com.ibm.db2.jcc.DB2XADataSource derby org.apache.derby.jdbc.ClientDriver org.apache.derby.jdbc.ClientXADataS ource h2 org.h2.Driver org.h2.jdbcx.JdbcDataSource mariadb org.mariadb.jdbc.Driver org.mariadb.jdbc.MySQLDataSource mssql com.microsoft.sqlserver.jdbc.SQLServ erDriver com.microsoft.sqlserver.jdbc.SQLServ erXADataSource mysql com.mysql.cj.jdbc.Driver com.mysql.cj.jdbc.MysqlXADataSourc e postgresql org.postgresql.Driver org.postgresql.xa.PGXADataSource https://quarkus.io/guides/datasource
- 14. Quarkus on Kubernetes Deployment ReplicaSet Pod Docker Service NodePort / LoadBalancer ConfigMap / Secret Kubernetes Resources
- 15. Quarkus on Kubernetes Quarkus provides extensions for building container images. • Jib • Docker • S2I To add the Jib extension ./mvnw quarkus:add-extension -Dextensions="container-image- jib" To build and push the image ./mvnw clean package Dquarkus.container-image.push=true
- 16. Quarkus on Kubernetes Quarkus offers the ability to automatically generate Kubernetes resources. • Kubernetes • OpenShift • Knative To add the Kubernetes extension ./mvnw quarkus:add-extension -Dextensions=”quarkus- kubernetes" To generate different resources by property # Possible values are kubernetes, openshift and knative. # The default value is kubernetes. quarkus.kubernetes.deployment-target=openshift
- 21. Messaging with Quarkus MicroProfile Reactive Messaging is based around 3 main concepts: • Message – A message is an envelope wrapping a payload – org.eclipse.microprofile.reactive.messaging.Message • Channel – Messages transit on channel – A channel is a virtual destination identified by a name • Connector – are extensions managing the communication with a specific transport technology
- 22. Messaging with Quarkus MicroProfile Reactive Messaging is based around 3 main concepts: • Message • Channel • Connector Application Broker Connector incoming outgoing
- 23. Building Event-driven App with Kafka The Kafka connector adds support for Kafka to Reactive Messaging. • is based on the Vert.x Kafka Client • name is: smallrye-kafka • to indicate a channelmp.messaging.[outgoing|incoming].{channel-name}.property=value
- 24. Building Event-driven App with Kafka To add the Kafka connector extension ./mvnw quarkus:add-extension -Dextensions="smallrye- reactive-messaging-kafka" To configure your application to receive Kafka records kafka.bootstrap.servers=kafka:9092 mp.messaging.incoming.prices.connector=smallrye-kafka mp.messaging.incoming.prices.value.deserializer=org.apache.kafka.common. serialization.DoubleDeserializer
- 25. Building Event-driven App with Kafka Producer Broker @Outgoing("iot-out") public double produce() { return sensor.currentTemperature(); } @Outgoing("iot-out") iot-topic publishes to iot-topic connector smallrye- kafka
- 26. Building Event-driven App with Kafka Broker@Incoming("iot-in") public void consume(Event event) { logger.info("Received event: {}", event); processEvent(event); } Consumer @Incoming("iot-in") iot-topic consumes from iot-topic connector smallrye- kafka
- 29. Observability Logs TracingMetrics • Observability is the ability to watch the state of a system/application based on some external outputs.
- 31. Resources • Quarkus.io https://code.quarkus.io/ • Quarkus Guides https://quarkus.io/guides/ • QuarkusWorkshop https://quarkus.io/quarkus-workshops/super- heroes/ • Quarkus Cheat Sheets https://lordofthejars.github.io/quarkus-cheat- sheet/ • RedHat Learning Portal https://learn.openshift.com/middleware/courses/middleware- quarkus/
- 32. Books
- 33. Thank You