This presentation explains the new challenges to be resolved with a Microservices Architecture and how the WildFly Swarm container & OpenShift/Kubernetes can address some of the patterns like running a lightweight JavaEE container, discover and load balance the services, inject the configuration of the services.

1. Microservices with
WildFly Swarm
Charles Moulliard (@cmoulliard)
17 Oct 2016

2. Who
Coder, Architect
Red Hat Engineer : Architect/Project lead for Global Platform Team
Apache Camel, Fabric8, WildFly Swarm, JBoss Forge committer
Mountain Biker, Belgian Beer Fan
Blog:
Twitter:
Email:
http://cmoulliard.github.io
@cmoulliard
cmoulliard@redhat.com

3. Agenda
The Context: Microservices and Java EE
WildFly Swarm: Concepts, Ideas & Mechanics
Code and Demo
Discussions and (hopefully) beer

4. Microservices

5. … SOA …

6.
– Martin Fowler, ThoughtWorks

7. Mono to Micro

8. Example

9. Be more concrete

13. … & Java EE

14. Perspectives on JavaEE
A collection of (useful) API’s
Stack of Frameworks
Designed to support distributed apps
Is JavaEE Ready Microservices ?
Depends what JavaEE 8/9 spec will propose
Does it support Microservices patterns ?
New initiative emerges :

 https://microprofile.io/

15. Perception

16. Stack of …..

17. Plus JVM

18. What I really need

19. WildFly Swarm

20. Intro
OSS Project sponsored by Red Hat
Compatriot of Wildfly Application Server
Support MicroProfile
Microservices ready
Part of a bigger system of interrelated projects under the JBoss / Red Hat
umbrella

21. Just Enough App Server
Use the API’s you want
Include the capabilities
you need
Wrap it up for deployment

22. Uber Jar
A single .jar file containing your
application,
the portions of WildFly required to
support it,
an internal Maven repository of
dependencies,
plus a shim to bootstrap it all

23. Fractions
A well-defined collection of application capabilities.
May map directly to a WildFly subsystem,
or bring in external capabilities such as Netflix Ribbon.

24. What Fractions can do
Enable WildFly subsystems (JAX-RS, Infinispan)
Integrate additional system capabilities (Topology)
Provide deployment (ribbon-webapp, jolokia)
Alter deployment (keycloak)

25. Some Fractions

26. Convert Java EE App to
use WildFly Swarm

27. Adding Fraction to your build
<dependency>
<groupId>org.wildfly.swarm</groupId>
<artifactId>jaxrs</artifactId>
</dependency>
<dependency>
<groupId>org.wildfly.swarm</groupId>
<artifactId>cdi</artifactId>
</dependency>
<dependency>
<groupId>org.wildfly.swarm</groupId>
<artifactId>swagger</artifactId>
</dependency>
...

28. Adding maven plugin
<plugin>
<groupId>org.wildfly.swarm</groupId>
<artifactId>wildfly-swarm-plugin</artifactId>
<version>${wildfly.swarm.version}</version>
<configuration>
<properties>
<swarm.port.offset>200</swarm.port.offset>
</properties>
</configuration>
<executions>
<execution>
<goals>
<goal>package</goal>
</goals>
</execution>
</executions>
</plugin>

29. Building & running
Build the maven module
$mvncleanpackage
$ls-latarget/your.jar
Run your Swarm App
$java-jartarget/your.jar
$mvnwildfly-swarm:run

30. Demo

31. Going beyond simple
(and Java EE)

32. Project stages
logger:
level:DEBUG
swarm:
port:
offset:10
---
project:
stage:production
logger:
level:INFO
swarm:
port:
offset:100

33. Customize Swarm
publicclassMySwarmApp{
publicstaticvoidmain(String[]args)throwsException{
Swarmswarm=newSwarm(false).withStageConfig("project-stages.yml");
swarm.fraction(newJAXRSFraction())
.fraction(newLoggingFraction());
//Startthecontainer&deploythefractions
swarm.start().deploy();

34. Customize Fraction
publicclassMySwarmApp{
publicstaticvoidmain(String[]args)throwsException{
Swarmswarm=newSwarm();
swarm.fraction(
newLoggingFraction().periodicSizeRotatingFileHandler("FILE",(h)->{
h.level(Level.INFO)
.append(true)
.suffix(".yyyy-MM-dd")
.rotateSize("30m")
.enabled(true)
.encoding("UTF-8")
.maxBackupIndex(2);
Map<String,String>fileSpec=newHashMap<>();
fileSpec.put("path",logFile);
h.file(fileSpec);
}).logger("br.org.sistemafieg.cliente",(l)->{
l.level(Level.INFO)
.handler("FILE");
}));

35. Securing access
publicclassMySwarmApp{
publicstaticvoidmain(String[]args)throwsException{
Swarmswarm=newSwarm();
swarm.start();
...
//Createthearchiveandregistertheresourcestobepackaged/scanned
JAXRSArchivearchive=ShrinkWrap.create(JAXRSArchive.class);
archive.as(Secured.class)
.protect()
.withRole("admin");
swarm.deploy(archive);
(provided by Keycloak: OpenID, SAML, Social Login, OAuth, LDAP, Active
Directory)

36. Demo

37. WildFly Microservices Demo

38. Questions
Twitter : @cmoulliard
Demos  https://github.com/cmoulliard/swarm-openshift
http://wildfly-swarm.io