The new and smart way to build microservices - Eclipse MicroProfile
- 1. 1@emilyfhjiang A new and smart way to develop cloud-native microservices - MicroProfile STSM, Liberty Architect of Microservicers, Advocate Liberty leadArchitect for MicroProfile and CDI, IBM @emilyfhjiang
- 2. 2@emilyfhjiang About Emily Jiang 2 Java Champion STSM, IBM, Liberty Lead Architect for MicroProfile and CDI Leads MicroProfile Config, Fault Tolerance, Service Mesh Co-spec lead for Config JSR CDI Expert Group Based in IBMs Hursley lab, UK Email: emijiang@uk.ibm.com https://www.linkedin.com/in/emily-jiang-60803812/
- 3. 3@emilyfhjiang Cloud demands: Small runtime memory footprint Small deployment sizes Fast starting applications No resource usage when idle
- 4. 4@emilyfhjiang Java in Cloud Small footprint Fast startup Qick/immediate rampup
- 5. 5@emilyfhjiang Java in Cloud Hotspot OpenJ9 OpenJ9 -Xshareclasses - Xquickstart Hotspot OpenJ9 OpenJ9 -Xshareclasses -Xquickstart Footprint is 60% smaller with OpenJ9 Hotspot OpenJ9 OpenJ9 -Xshareclasses - Xquickstart Hotspot OpenJ9 OpenJ9 -Xshareclasses -Xquickstart Startup time is 30% faster with OpenJ9 Xshareclasses -Xquickstart 5 Java in Cloud Hotspot OpenJ9 OpenJ9 -Xshareclasses - Xquickstart Hotspot OpenJ9 OpenJ9 -Xshareclasses -Xquickstart Footprint is 60% smaller with OpenJ9 Hotspot OpenJ9 OpenJ9 -Xshareclasses - Xquickstart Hotspot OpenJ9 OpenJ9 -Xshareclasses -Xquickstart Startup time is 30% faster with OpenJ9 Xshareclasses -Xquickstart
- 6. 6@emilyfhjiang cloud-native microservice 1. RESTful like cattle not pet, communicative 2. Configurable 3. Fault tolerance 4. Can be discovered 5. Secure 6. Traceable, monitorable 7. Able to communicate with the cloud infrastructure
- 7. 7@emilyfhjiang Community Driven Lightweight, Iterative Processes Specs, APIs, TCKs NO Reference Implementation
- 8. 8@emilyfhjiang Open specifications Wide vendor support REST services OpenAPI support Security Fault Tolerance Configuration Metrics Health Open Tracing https://wiki.eclipse.org/MicroProfile/Implementation Quarkus
- 9. 9@emilyfhjiang openliberty.io Jan Dec 19.0.0.2 19.0.0.1 19.0.0.3 4-week release cadence
- 10. 10@emilyfhjiang 10 MicroProfile 1.0 (Fall 2016) jaxrs-2.0 cdi-1.2 jsonp-1.0 MicroProfile 1.1 (August 2017) microProfile-1.0 mpConfig-1.0 MicroProfile 1.2 (Sept 2017) microProfile-1.1 mpConfig-1.1 mpFaultTolerance-1.0 mpHealth-1.0 mpMetrics-1.0 mpJwt-1.0 2017 2018 MicroProfile 1.3 (Dec 2017) MicroProfile 1.2 mpConfig-1.2 mpMetrics-1.1 mpOpenApi-1.0 mpOpenTracing-1.0 mpRestClient-1.0 MicroProfile 1.4 (June 2018) MicroProfile 1.3 mpConfig-1.3 mpFaultTolerance-1.1 mpJwt-1.1 mpOpenTracing-1.1 mpRestClient-1.1 2019 MicroProfile 2.0.1 (July 2018) MicroProfile 1.4 jaxrs-2.1 // Java EE 8 cdi-2.0 // Java EE 8 jsonp-1.1 // Java EE 8 jsonb-1.0 // Java EE 8 MicroProfile 2.1 (Oct 2018) MicroProfile 2.0 mpOpenTracing-1.2 MicroProfile 2.2 (Feb 2019) Fault Tolerance 2.0 OpenAPI 1.1 OpenTracing 1.3 Rest Client 1.2
- 11. 11@emilyfhjiang Health CheckMetrics Open Tracing JAX-RS JSON-PCDI Config Fault Tolerance JWT Propagation Open API Rest Client JSON-B MicroProfile Specifications
- 12. 12@emilyfhjiang Theres a good chance youll use REST APIs
- 13. 13@emilyfhjiang Eclipse MicroProfile JAX-RS JSON-PCDIRest Client JSON-B
- 14. 14@emilyfhjiang JAX-RS B @ApplicationPath("System") public class SystemApplication extends Application {} @Path("properties") public class PropertiesResource { @GET @Produces(MediaType.APPLICATION_JSON) public JsonObject getProperties() {} }
- 15. 15@emilyfhjiang CDI BA public class InventoryManager { @Inject private SystemClient systemClient; }
- 16. 16@emilyfhjiang JSON-B & JSON-P A B ... @GET @Produces(MediaType.APPLICATION_JSON) public InventoryList listContents() { return manager.list(); } public class InventoryList { private List<SystemData> systems; public InventoryList(List<SystemData> systems) { this.systems = systems; } public List<SystemData> getSystems() { return systems; } }
- 17. 17@emilyfhjiang MicroProfile REST Client BA @Inject @RestClient private SystemClient defaultRestClient; @Dependent @RegisterRestClient @RegisterProvider(UnknownUrlExceptionMapper.class) @Path("/properties") public interface SystemClient { @GET @Produces(MediaType.APPLICATION_JSON) public Properties getProperties() throws UnknownUrlException, ProcessingException; } io.openliberty.guides.inventory.client.SystemClient/mp-rest/url=http://localhost:9080/system
- 18. 18@emilyfhjiang Handling 100s of Services 1 8
- 19. 19@emilyfhjiang Eclipse MicroProfile JAX-RS JSON-PCDI Config Fault Tolerance JWT Propagation Open API Rest Client JSON-B
- 20. 20@emilyfhjiang MicroProfile OpenAPI A B openapi: 3.0.0 info: title: Inventory App description: App for storing JVM system properties of various hosts. license: name: Eclipse Public License - v 1.0 url: https://www.eclipse.org/legal/epl-v10.html version: "1.0" servers: - url: http://localhost:{port} description: Simple Open Liberty. variables: port: description: Server HTTP port. default: "9080" paths: /inventory/systems: get: summary: List inventory contents. description: Returns the currently stored host:properties pairs in the inventory. operationId: listContents responses: 200: description: host:properties pairs stored in the inventory. content: application/json: schema: $ref: '#/components/schemas/InventoryList . http://localhost:9080/openapi/ui
- 21. 21@emilyfhjiang MicroProfile JWT A B @GET @RolesAllowed({ "admin", "user" }) @Path("{hostname}") @Produces(MediaType.APPLICATION_JSON) public Response getPropertiesForHost(@PathParam("hostname") String hostname, @Context HttpHeaders httpHeaders) {}
- 22. 22@emilyfhjiang MicroProfile Fault Tolerance A B @Fallback(fallbackMethod = "fallbackForGet") public Properties get(String hostname) throws IOException { return invUtils.getProperties(hostname); }
- 23. 23@emilyfhjiang A MicroProfile Config B @Inject @ConfigProperty(name = "io_openliberty_guides_inventory_inMaintenance") private Provider<Boolean> inMaintenance; config_ordinal=100 io_openliberty_guides_inventory_inMaintenance=fals e { "config_ordinal":150, "io_openliberty_guides_inventory_inMaintenance":true }
- 24. 24@emilyfhjiang Handling 100s of collaborating services requires a strong operations focus
- 25. 25@emilyfhjiang Eclipse MicroProfile Health Check Metrics Open Tracing JAX-RS JSON-PCDI Config Fault Tolerance JWT Propagation Open API Rest Client JSON-B
- 26. 26@emilyfhjiang MicroProfile Health A B @Health @ApplicationScoped public class InventoryResource implements HealthCheck { ... public boolean isHealthy() {...} @Override public HealthCheckResponse call() { if (!isHealthy()) { return HealthCheckResponse.named(InventoryResource).withData().down().build(); } return HealthCheckResponse.named(InventoryResource).withData().up().build(); } }
- 27. 27@emilyfhjiang MicroProfile Metrics A B @Timed(name = "inventoryPropertiesRequestTime", absolute = true, description = "Time needed to get the properties of" + "a system from the given hostname") public Properties get(String hostname) { return invUtils.getProperties(hostname); }
- 28. 28@emilyfhjiang MicroProfile OpenTracing A B @Traced(value = true, operationName = "InventoryManager.list") public InventoryList list() { return new InventoryList(systems); } JAX-RS methods are automatically traced by default
- 29. 29@emilyfhjiang How to get started?
- 31. 31@emilyfhjiang Microservice Deployment Kubernetes IstioDocker Health CheckMetrics Open Tracing JAX-RS JSON-PCDI Config Fault Tolerance JWT Propagation Open API Rest Client JSON-B
- 32. 32@emilyfhjiang MicroProfile Config with Kubernetes A B env: - name: GREETING valueFrom: configMapKeyRef: name: greeting-config key: message kubectl create configmap greeting-config --from-literal message=Greetings... @Inject @ConfigProperty(name = "GREETING") private String greeting;
- 33. 33@emilyfhjiang MicroProfile Health with Kubernetes A B readinessProbe: httpGet: path: /health port: 9080 initialDelaySeconds: 15 periodSeconds: 5 failureThreshold: 1
- 34. 34@emilyfhjiang Upcoming IBM event on modernization JNation Europe Application, Platform & Modernization Hursley Summit 9-10th September Registration: ibm.bz/APMSummit