Just enough app server

Just Enough App Server

by antonio goncalves@agoncal

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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


JSTL

Interceptors JAX-RS

JSON-P

CDI

JPAWebSocket

JTA

Bean Validation

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Java EE

JSP


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


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


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


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


Annotations


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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


Annotations


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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


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


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


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


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


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


And what about multiple apps ?

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My code

Top CDsssssssss

Servlets


My code

Servlets

CommonsAnnotations

Logging

My code

Servlets

CommonsAnnotations

Logging

My code

Servlets


My code

Servlets

CommonsAnnotations

Logging

My code

Servlets

CommonsAnnotations

Logging

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My code

Top CDsssssssss


My code

CommonsAnnotations

Logging

My code

CommonsAnnotations

Logging

My code


My code

CommonsAnnotations

Logging

My code

CommonsAnnotations

Logging

ServletsLocal Maven Repo

If only we had Jigsaw !

Demo

WildFly Swarmwith M2_REPO


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


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


Demo

Raspberry PI


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

[email protected]

@agoncal@pluralsight

@devoxxfr@lescastcodeurs

60 antonio goncalves

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Just enough app server

Software

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