Basic method for Java EE Web Profile

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Basic method for Java EE Web Proﬁle HASUNUMA Kenji GlassFish Users Group Japan k.hasunuma@coppermine.jp Twitter: @khasunuma

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Proﬁle?

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Subset of   Java Speciﬁcation

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Subset of   Java Specification Java SE  Compact Profile Java EE  Web Profile

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Why Web Proﬁle?

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Java EE 7 Platform • Web Application • Enterprise Application • Web Services • Management and Security • Java EE-related Specs in Java SE

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Java EE 7 Platform

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Java EE 7 Web Proﬁle

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Java EE 7 Web Proﬁle For Web Applications

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Why Web proﬁle? • Java EE Servers is too large, complex and slow to use quickly • For Web applications, some of Java EE feature is unused • Web container is often powerless for large Web applications

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Main features • Web application (JSF, MVC [*1] ) • RESTful Web service (JAX-RS) • Persistence and Transaction (JPA/JTA) • Dependency Injection (CDI) *1 : 3rd party framework or MVC (Java EE 8 Draft)

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Omit from Web proﬁle • Inter-systems interfaces  e.g. JAX-WS, JMS, JavaMail, JCA • Authentication/Authorization  e.g. JACC/JAAS, JASPIC • Server management (JSR 77) • J2EE legacy components

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EJB Notice • Web proﬁle contains EJB Lite; subset of EJB (Full specs.) • Incl. Session Bean (Local/No I/F), JPA/JTA, Async, Timer (Not persist), etc. • Excl. Session Bean (Remote), MDB, JAX-WS, Timer (Persist) etc.

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EJB Timer (Not persist) @Schedule(..., persistent = false) void polling() { // processing } (By default, the value of 'persistent' is true)

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History of Web Profile • Introduction as a part of Java EE 6  (JAX-RS is excluded) • Add JAX-RS, WebSocket, JSON-P to Java EE 7 Web Profile • Add MVC to Java EE 8 Web Profile (by Early Draft)

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How to use? • Download 'Web Proﬁle'  e.g. GlassFish, WAS Liberty • Run as 'Web Proﬁle'  e.g. WildFly, JBoss EAP • Not Compatible  e.g. WebLogic (Coming soon?)

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javax javaee-web-api 7.0 provided Maven Dependencies cf. https://search.maven.org/

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Full Platform vs. Web Proﬁle

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How small? Size (Installed) Size (Packaged) GlassFish 4.1.1 Full Platform 126 MBytes 104 MBytes GlassFish 4.1.1 Web Proﬁle 75.8 MBytes 57.9 MBytes

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How fast? Startup time (*) 1 2 3 WildFly 10 Full Platform 4959 ms 5085 ms 5090 ms WildFly 10 Web Proﬁle 3907 ms 4164 ms 3952 ms * Surface Pro 2 (Windows 10 / Core i5 4300U / 4GB RAM)

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Full vs. Web Proﬁle Full Platform Web Proﬁle Target System Web application Features Complete Restrict Speed Slow Fast Footprint Large Small Security Strict Basic

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Using Web Proﬁle

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Case 1 Migration from Tomcat

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Before Web Proﬁle

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After Web Proﬁle

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Case 2 Web application

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Simple Web application HTML5 HTML5 HTML5 JPA JSF (MVC)

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Case 3 Real time application

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Quote Service (Chart) WebSocket WebSocket

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Real time chat WebSocket WebSocket WebSocket WebSocket

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Case 4 RESTful Web services

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RESTful Web services REST REST Ajax JavaFX Browser Mobile App External Systems JPA JAX-RS

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Case 5 Sending a notify mail

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Sending a notify mail JavaMail SMTP

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Sending a notify mail JavaMail SMTP ?

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How to use JavaMail? • JavaMail is not in Web Proﬁle • But we can use JavaMail as a library of our applications • Other feature that is not in Web Proﬁle can use as library of applications

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Case 6 Microservices

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What's Microservice • The microservice architectural style is an approach to developing a single application as a suite of small services, each running in its own process and communicating with lightweight mechanisms  -- Martin Fowler • Spring Boot is a famous technology for implementation of microservices

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Java EE Microservice • Some technologies are available; Payara Micro, WAS Liberty,   WildFly Swarm, kumuluzEE, etc. • They consists of a subset of Java EE API (such a Web Proﬁle) • They also run on Java SE runtime   -- Their footprint is so small

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Conclusion

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Why needs Web Proﬁle? • Java EE specs. are too large to build Web applications • Some of Java EE specs. are so often unused • We needed the standard that subset of Java EE for Web applications

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• Development of almost web apps. • In particular case: • Migration from Tomcat • Real time web apps. (WebSocket) • RESTful Web services (JAX-RS) Use case of Web Proﬁle

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Attentions • Web Proﬁle is NOT for systems but for applications • Web Proﬁle is lightweight, but some important feature is omitted • There is not "Golden Hammer". We'd use the two specs. for purpose

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Basic method for   Java EE Web Proﬁle HASUNUMA Kenji GlassFish Users Group Japan k.hasunuma@coppermine.jp Twitter: @khasunuma