Optimizing Enterprise Javafor a Microservices Architecture

Otávio Santana@otaviojava

otaviojava@apache.org

Enterprise Java Standards History

J2EE 1.2 J2EE 1.3 J2EE 1.4 Java EE 5 Java EE 6 Java EE 7 Java EE 8

2000 2005 2010 2015 2020ReleaseCadence

● JCP Members● JCP EC● JSR ● Standards

Fundamental Shifts in Computing

● Deliver new features more quickly● Smaller, more agile teams● Deliver business features as discrete services● Scale services independently

● Reduce time to market● Address unpredictable loads● Pay as you go● Containerization

Cloud

Microservices

MicroProfile Background● Began as a collection of independent discussions

○ Many innovative “microservices” efforts in existing Java EE projects■ WildFly Swarm■ WebSphere Liberty■ Payara■ TomEE

○ Projects already leveraging both Java EE and non-Java EE technologies○ Creating new features/capabilities to address microservices architectures

● Quickly realized there is common ground

● Java EE technologies are already being used for microservices,but we can do better

Profile

MicroProfile Release Philosophy

Release 1.0

JAX-RSCDI

JSON-P

Buildconsensus Standardize

Rapidly iterateand innovate

Sept 2016

Bridging Community and Standards

Vendor Choice

Implementation Choice

Application Portability

Backwards Compatibility

Reduced Risk

Broad Collaboration

Encouraged experimentation

Fail Fast

Rapid innovation

An Eclipse FoundationProject

● Meritocracy; vendor neutrality● MicroProfile leadership can change over

time● Legal and technical infrastructure● Trademark Ownership● Accepts Apache License

MicroProfile 1.1 Underway

Security: JWT Token Exchange 1.0

Health Check 1.0

Configuration 1.0

Fault Tolerance 1.0 (Stretch goal)

Second Quarter2017!

Configuration 1.0@ApplicationScopedpublic class InjectedConfigUsageSample {

@Inject private Config config;

@Inject @ConfigProperty(name="myprj.some.url") private String someUrl;

@Inject @ConfigProperty(name="myprj.some.port") private Optional<Integer> somePort;

@Inject @ConfigProperty(name="myprj.some.dynamic.timeout", defaultValue="100") private javax.inject.Provider<Long> timeout;}

Security: JWT Token Exchange 1.0

@Priority(Priorities.AUTHENTICATION)public class JWTAuthFilter implements ContainerRequestFilter{

@Override public void filter(ContainerRequestContext requestContext) throws IOException { String authHeaderVal = requestContext.getHeaderString("Authorization"); if(authHeaderVal.startsWith("Bearer")){ try { validate(authHeaderVal.split(" ")[1]); } catch (InvalidJwtException ex) { requestContext.abortWith(Response.status(Response.Status.UNAUTHORIZED).build()); } }else{ requestContext.abortWith(Response.status(Response.Status.UNAUTHORIZED).build()); } }

Health Check 1.0

@Path("/app")public class HealthCheckResource {

@GET @Path("/diskspace") @Health public HealthStatus checkDiskspace() { [...] }

@GET @Path("/something-else") @Health public HealthStatus checkSomethingElse() { [...] }}

@ApplicationScopedpublic class HealthChecks {

@Produces @Health public HealthStatus checkDiskspace() { [...] }

@Produces @Health public HealthStatus checkSomethingElse() { [...] }}

Fault Tolerance 1.0 (Stretch goal)

@ApplicationScopedpublic class FaultToleranceBean {

@Retry(maxRetries = 2) public Runnable doWork() { Runnable mainService = () -> serviceA(); return mainService;

}}}

CircuitBreaker cb = FaultToleranceFactory.getInstance(CircuitBreaker.class) .withFailureThreshold(3, 10) .withSuccessThreshold(5) .withDelay(1, TimeUnit.MINUTES);Connection connect = execution.with(cb).run(this::connect);

Feature Backlog* - Help us prioritize [1 of 2]

● Container API● Microservic-y annotations

(Ex: @CircuitBreaker)● Testing● Distributed Logging● Distributed Tracing● OAuth2/OpenID Connect● Microservice Security● Service Discovery● Health Check

● Configuration● Metrics/Monitoring● WebSockets● JSON-B● Bean Validation● JPA● JTA● Concurrency Utilities for

Java EE

* Some Items may be removed due to lack of interest

Feature Backlog* - Help us prioritize [2 of 2]

● Messaging / Eventing● Asynchronous/Reactive

Support / Patterns● Integration with Reactive /

Eventing systems● Big Data/NoSQL strong &

weak consistency support● NetFlix OSS Integration● JCache

● JDK 8 Lambda+Streams

● EJB Lite● Servlets● HTTP/2● Startup Time● Disk Space● Memory● Uber-jar● Java 9 Modularity

* Some Items may be removed due to lack of interest

Release Schedule

Sep 2016

MicroProfile1.0

Q4 2016 2017 2017

Move toFoundation

MicroProfile1.1

MicroProfile1.2

TomEE

DEMO

Join the Community!

Join the Discussion!https://groups.google.com/forum/#!forum/microprofile

Resources● MicroProfile.io

● MicroProfile Discussion Forumbit.ly/MicroProfileForum

● MicroProfile Exampleshttps://github.com/microprofile/microprofile-samples

Otávio Santana@otaviojava

otaviojava@apache.org