Just Enough App Server

by antonio goncalves@agoncal

2 @agoncal

Antonio Goncalves

Take what you need from Java EE

and resize your App Server

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How do we see Java EE App Servers ?

One Monolith !SlowFat

Heavyweight

Old

Not sexy

Boring

App servers are

monolithic !

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Java EE

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Web Profile

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Servlets

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Three types of Java EE App Servers

Three Monoliths !

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Bits & Pieces

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Servlets

JSP

Expression LanguageServlets

JSTL

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Web Profile

JSP

Expression LanguageServlets

JSTL

Interceptors JAX-RS

JSON-P

CDI

JPAWebSocket

JTA

Bean Validation

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Java EE

JSP

Expression LanguageServlets

JSTL

Interceptors JAX-RS

JSON-P

CDI

JPAWebSocket

JTA

Bean Validation

JMSJSFJAX-WS EJB

JavaMail

JCA

Concurrency

Batch

JASPIC

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JVM

JSP

Expression LanguageServlets

JSTL

Interceptors JAX-RS

JSON-P

CDI

JPAWebSocket

JTA

Bean Validation

JMSJSFJAX-WS EJB

JavaMail

JCA

Concurrency

Batch

JASPIC

JVM

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JVM

JTA

JMS

JSP

Interceptors JAX-RS

Expression Language

JSF

Servlets

JSON-P

CDI

JAX-WS

JPA

Bean Validation

EJB

JavaMailWebSocket

JSTL

JCA

Concurrency

Batch

JASPIC

JDBC JNDI Logging JAX-B JMXCommons

Annotations

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Your own app

JTA

JMS

JSP

Interceptors JAX-RS

Expression Language

JSF

Servlets

JSON-P

CDI

JAX-WS

JPA

Bean Validation

EJB

JavaMailWebSocket

JSTL

JCA

Concurrency

Batch

JASPIC

JDBC JNDI Logging JAX-B JMXCommons

Annotations

My code

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Your own app dependencies

JTA

JMS

JSP

Interceptors JAX-RS

Expression Language

JSF

Servlets

JSON-P

CDI

JAX-WS

JPA

Bean Validation

EJB

JavaMailWebSocket

JSTL

JCA

Concurrency

Batch

JASPIC

JDBC JNDI Logging JAX-B JMXCommons

Annotations

My code SLF4J Angular ReactPrimefaces Bootstrap JQuery

App servers are

slow !

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Startup time of App Servers

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Startup time of JBoss

Using a Windows XP virtual machine (Virtual Box)

3.2.8 4.2.3 5.1 6.1 7 Beta0

5

10

15

20

25

30

35

40

Startup time

Specs

App servers

consume resources !

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Memory consumption of App Servers

App servers use

outdated packaging !

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Your own app… needs packaging

JTA

JMS

JSP

Interceptors JAX-RS

Expression Language

JSF

Servlets

JSON-P

CDI

JAX-WS

JPA

Bean Validation

EJB

JavaMailWebSocket

JSTL

JCA

Concurrency

Batch

JASPIC

JDBC JNDI Logging JAX-B JMXCommons

Annotations

My code SLF4J Angular ReactPrimefaces Bootstrap JQuery

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Skinny War

JTA

JMS

JSP

Interceptors JAX-RS

Expression Language

JSF

Servlets

JSON-P

CDI

JAX-WS

JPA

Bean Validation

EJB

JavaMailWebSocket

JSTL

JCA

Concurrency

Batch

JASPIC

JDBC JNDI Logging JAX-B JMXCommons

Annotations

My code SLF4J Angular ReactPrimefaces Bootstrap JQuery

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My code

Fat War

JTA

JMS

JSP

Interceptors JAX-RS

Expression Language

JSF

Servlets

JSON-P

CDI

JAX-WS

JPA

Bean Validation

EJB

JavaMailWebSocket

JSTL

JCA

Concurrency

Batch

JASPIC

JDBC JNDI Logging JAX-B JMXCommons

Annotations

SLF4J ApacheCommons Drools SLF4J Angular React

Demo

CD-BookStoreTop BooksTop CDs

https://github.com/agoncal/agoncal-sample-javaee/06-EnoughAppServer

3 apps

3 different needs !

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CD-Book Store

JTA

JMS

JSP

Interceptors JAX-RS

Expression Language

JSF

Servlets

JSON-P

CDI

JAX-WS

JPA

Bean Validation

EJB

JavaMailWebSocket

JSTL

JCA

Concurrency

Batch

JASPIC

JDBC JNDI Logging JAX-B JMXCommons

Annotations

My code Primefaces Bootstrap JQuery

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Top Books

JTA

JMS

JSP

Interceptors JAX-RS

Expression Language

JSF

Servlets

JSON-P

CDI

JAX-WS

JPA

Bean Validation

EJB

JavaMailWebSocket

JSTL

JCA

Concurrency

Batch

JASPIC

JDBC JNDI Logging JAX-B JMXCommons

Annotations

My code

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Top CDs

JTA

JMS

JSP

Interceptors JAX-RS

Expression Language

JSF

Servlets

JSON-P

CDI

JAX-WS

JPA

Bean Validation

EJB

JavaMailWebSocket

JSTL

JCA

Concurrency

Batch

JASPIC

JDBC JNDI Logging JAX-B JMXCommons

Annotations

My code

What a Waste !

Let's package what we need…

...in a “uber” Jar

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My code

CD-Book Store

JTAInterceptors

JAX-RS

Expression Language

JSF

Servlets

JSON-PCDI

JPA

Bean Validation

EJB

JDBC JNDI Logging JAX-BCommons

Annotations

Primefaces Bootstrap JQuery

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My code

Top Books

JTAInterceptors

Expression LanguageServlets

JSON-PCDI

JPA

Bean Validation

JDBC JNDI Logging JAX-BCommons

Annotations

JAX-RS

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My code

Top CDs

Servlets

CommonsAnnotations Logging

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Several solutions to choose from

● Full Java EE● WildFly Swarm● Payara Micro● TomEE● KumuluzEE

● “Sort of” Java EE● Spring Boot

● Other● Dropwizard● Lagom

Demo

WildFly Swarm

https://github.com/agoncal/agoncal-sample-javaee/06-EnoughAppServer

And what about multiple apps ?

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My code

Top CDsssssssss

Servlets

CommonsAnnotations Logging

My code

Servlets

CommonsAnnotations

Logging

My code

Servlets

CommonsAnnotations

Logging

My code

Servlets

CommonsAnnotations Logging

My code

Servlets

CommonsAnnotations

Logging

My code

Servlets

CommonsAnnotations

Logging

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My code

Top CDsssssssss

CommonsAnnotations Logging

My code

CommonsAnnotations

Logging

My code

CommonsAnnotations

Logging

My code

CommonsAnnotations Logging

My code

CommonsAnnotations

Logging

My code

CommonsAnnotations

Logging

ServletsLocal Maven Repo

If only we had Jigsaw !

Demo

WildFly Swarmwith M2_REPO

https://github.com/agoncal/agoncal-sample-javaee/06-EnoughAppServer

Some metrics

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Packaging Size

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Startup time

And how do I manage it now ?

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Configure your apppublic class MyMain { public static void main(String...args) { new Container() .fraction(new DatasourcesFraction() .jdbcDriver("h2", (d) -> { d.driverClassName("org.h2.Driver"); d.driverModuleName("com.h2database.h2"); }) .dataSource("ExampleDS", (ds) -> { ds.driverName("h2"); ds.connectionUrl("jdbc:h2:mem:test"); ds.userName("foo"); ds.password("bar"); })) .start() .deploy();

Demo

WildFly Swarmwith management

https://github.com/agoncal/agoncal-sample-javaee/06-EnoughAppServer

And what about Docker ?

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Dockerfile

FROM java:openjdk-8-jdk

EXPOSE 8081

ADD target/topcds-swarm.jar /opt/topcds-swarm.jarENTRYPOINT ["java", "-jar", "/opt/topcds-swarm.jar"]

Demo

Docker

https://github.com/agoncal/agoncal-sample-javaee/06-EnoughAppServer

Demo

Raspberry PI

https://github.com/agoncal/agoncal-sample-javaee/06-EnoughAppServer

Final word

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Wildfly Swarm

● Based on good old JBoss AS● Bundles several fractions

● Java EE● Netflix OSS (Ribbon, Hystrix, RxJava)● Spring● Logstash● Swagger● ...

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Java EE App Servers

● Java EE app server have changed● Are not monolithic, slow, consume resources ● Package the way you want (skinny/fat war, uber

jar)● Re-use your Java EE expertise● Look Ma, « Microservices inside »● « I’m centralised and I’m proud! »

That's it !

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http://amazon.com/author/agoncal

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https://www.pluralsight.com/authors/antonio-goncalves

Thanks

www.antoniogoncalves.organtonio.goncalves@gmail.com

@agoncal@pluralsight

@devoxxfr@lescastcodeurs

Q & A

60 antonio goncalves

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