Slides used for my talk with Sébastien Blanc at Oracle Code One 2019

1. Java server-side
20 years old and still innovative!
@jefrajames @sebi2706

2. J2EE
Servlet
JSP
EJB 1-2
JMS
1999-2003 2006 2009 2013 2017 2019
Java EE 5
Ease of Dev
EJB 3
JPA
JSF
JAX-WS
Java EE 6
CDI
JAX-RS
Bean
Validation
Web Profile
Java EE 7
JBatch
Web Socket
JSON-P
Concurrency
The origins
Sun Enterprise times
From J2EE to Jakarta EE
A user experience
Java EE 8
Java SE 8
JSON-B
Security
Jakarta EE
Java EE 8
Equivalent
GlassFish 5.1
Jakarta EE 8
Eclipse Cloud times
Oracle Enterprise times

3. Current status
Fragmented yet consistent and innovative
MicroProfile 1.x
Java EE 8
MicroProfile 2.x, 3.x
Jakarta EE 8Java EE 7 Jakarta EE 9
MicroProfile 3.x
Innovation Innovation
Innovation
Java SE 7,8
Java SE 9, 10, 11, 12, 13 …
Amazon Coretto, Alibaba Dragonwell, AdoptOpenJdk, Azul
HotSpot, OpenJ9, GraalVM
Innovation

4. • Standards are slow
– Broad consensus and getting things right takes time
• Standard don’t guarantee portability
– Still better than vendor lock-in
• Standards don’t have feature XYZ
– The core of an ecosystem can’t be bloated or complex
• Standards don’t innovate
– In fact they do and over-standardizing the unproven or niche case is a bad
idea
• It’s just a bench of vendor experts
• You can on-board
Standards?

5. Shifting to cloud-native applications
2006 2008 2009 2010 2011 2012 2013 2014 2015

6. Shifting to cloud-native applications
To
Private on premise data centers Cloud platforms
Bare metal infrastructure Infrastructure as code
Mutualized full-blown application servers Just enough runtime
Monolith Microservices
SQL-only Polyglot persistency
ACID transactions Eventual consistency
Synchronous & imperative programming Asynchronous & functional programming
Standalone applications API-first platforms
From

7. ● Runtime efficiency: fast startup, small system footprint, container awareness
● Built-in “Cloud-native” features:
○ Observability
○ Fault Tolerance
○ External configuration sources
○ Distributed security
○ Service mesh readiness
● Agile specification process
Innovation needed!

8. MicroProfile
support
The application servers (r)evolution
Java/Jakarta 8 EE
support

9. Demo time!
Simple Card Payment System
Easy to Pay
Check amount,
POS, card
Ask authorization
If amount >100$
Fallback delegation
if amount <=200$
Smart Bank
Gateway
Accept if
amount<=500$
TomEE
(Port 8082)
Merchant
Back Office
Payment Request
Payment Response
Authorization Request
Authorization Response

10. OpenJ9?
Memory footprint: -30%
Startup time
(optional class sharing)
: -15%

11. • Renew the Java EE “legacy” image
• MicroProfile and Jakarta EE integration?
• javax packages renaming: big bang or incremental?
• Jakarta EE release cadence
• Evolution of the ecosystem: IBM, Red Hat, Microsoft, Amazon, Alibaba
...
• Effective contribution of the user community to the success of Jakarta
EE
Challenges

12. Conclusion

13. Thank you!