The Java EE 7 Platform: Developing for the Cloud (FISL 12)
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The document discusses the Java EE 7 platform and developing applications for the cloud. It outlines the core Java EE 6 programming model and web profile. It also discusses new features in Java EE 7 like modularity, cloud support in specifications like Servlets 3.1 and JPA 2.1, and a technology refresh with specifications like JAX-RS 2.0. The modular design of Java EE 7 applications is also described.
The Java EE 7 Platform: Developing for the Cloud (FISL 12)
- 1. <Insert Picture Here> The Java EE 7 Platform: Developing for the Cloud Arun Gupta, Java EE & GlassFish Guy blogs.oracle.com/arungupta, @arungupta
- 2. The following/preceding is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle. 2
- 3. The Core Java EE 6 Programming Model Web JSP 2.2 Container JAX-RS 1.1 JSF 2.0 CDI Extensions EL 1.2 Extensions Servlets 3.0 Bean CDI 1.0 / Interceptors 1.1 / JSR 250 1.1 Validation 1.0 Managed Beans 1.0 EJB 3.1 JPA 2.0 / JTA 1.1 3
- 4. The Java EE 6 Web Profile 1.0 Servlets 3.0 JPA 2.0 EJB 3.1 JDBC StAX Interceptors JSF 2.0 JAX-RS JNDI JavaMail 1.1 Bean EJB 3.1 Lite JAXB JMS JACC Validation1.0 JSP 2.2 CDI 1.0 JAX-WS JAXP SAAJ Managed JTA 1.1 JASPIC JAX-RPC ... Beans 1.0 Contributed by RedHat New Updated 4
- 5. Compatible Java EE 6 Impls Today: Web Profile Only Announced: 5
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- 7. 9 Reasons why Java EE 6 will save $$ • Prototyping (multiple IDEs) • Development (~30MB, incremental deployment, ...) • Production (Variety, Start small/then scale) • Support (Pick the best one) • Training (“Only” Java EE 6 APIs) • Portability (Backwards compatibility) • Adoption (Growing) • Freedom of choice (Multiple vendors) • Plan B (Similar component models) http://www.adam-bien.com/roller/abien/entry/8_reasons_why_java_ee 7
- 8. Jigsaw puzzle, From the real users ... Modular, standard, less xml, easy, easy, have I Developers can concentrate said easy? on business logic, Java EE 6 is providing a standard for Standards compliance, vendor the infrastructure. independence, milliseconds and kilobyte deployment Faster development, Higher integrated specs, less frameworks, less simple and annotation driven, complexity, more great single-classloader WARs, code shipped next level of industry standard Definite excuse to avoid Spring forever Simplified Java Not your fat grandfather's Development, Focus on enterprise Java anymore, building great products enterprise Java renaissance http://blogs.oracle.com/arungupta/tags/community+feedback 8
- 9. Avoid “framework explosion” In selecting an application server our main goal was to avoid the framework explosion that happens when you use a "custom" Enterprise stack like Tomcat + Spring + Hibernate + Myfaces +... Java EE 6 had 80% of what we needed out of the box: strong persistence support ( JPA ), inversion of control ( CDI ), and a lightweight component model ( EJB 3.1 ) http://blogs.oracle.com/stories/entry/egesa_engineering_avoids_framework_explosion 9
- 10. What does Java EE offer to Cloud ? ● Containers ● Injectable services ● Scale to large clusters ● Security model ● ... 10
- 11. Java EE for the Cloud : JSR 342 • More easily operate on private/public clouds • Multi-tenancy • Elasticity • Tighter requirements for resource and state management • Better isolation between applications • Potential standard APIs for NRDBMS, Caching, other • Common management and monitoring interfaces • Better packaging • Evolution, not revolution 11
- 12. Cloud Platform Application Java Persistence Queueing Service Service Service … State Management Virtualization Layer 12
- 13. Cloud Platform Application Code Code Code QoS Schema Migration Security … Module Module Module Information Java Persistence Queueing Service Service Service … State Management Virtualization Layer 13
- 14. Cloud Platform Application Application Application Java Persistence Queueing Service Service Service … State Management Virtualization Layer 14
- 15. Cloud Platform Application Application Application Application Application Java Persistence Queueing Service Service Service … State Management Virtualization Layer 15
- 16. Cloud Platform Managed Environment Application Application Application Application Application Java Persistence Queueing Service Service Service … State Management Virtualization Layer 16
- 17. The Java EE 7 Modularity • Built on Java SE 8 work • Applications made of modules • Dependencies are explicit • Versioning is built-in • Classloaders are straightened 17
- 18. Modular Applications demo-app demo-web-1.0.3 18
- 19. Modular Applications demo-app twitter-client-1.0.3 demo-web-1.0.3 demo-persist-1.0.3 19
- 20. Modular Applications demo-app twitter-client-1.0.3 demo-web-1.0.3 demo-persist-1.0.3 javaee-web-7.0 jpa-2.1 jax-rs-2.0 20
- 21. Modular Applications demo-app twitter-client-1.0.3 demo-web-1.0.3 demo-persist-1.0.3 javaee-web-7.0 jpa-2.1 jax-rs-2.0 gf-appserver-4.0.1 eclipselink-2.1.3 jersey-2.0.5 21
- 22. Modular Applications demo-app twitter-client-1.0.4 jax-rs-2.1.1 demo-web-1.0.4 demo-persist-1.0.3 jersey-2.1.2 javaee-web-7.0 jpa-2.1 gf-appserver-4.0.1 eclipselink-2.1.3 jersey-2.0.5 22
- 23. Modular Applications demo-app twitter-client-1.0.5 jax-rs-2.1.1 demo-web-1.0.5 demo-persist-1.0.3 jax-rs-2.1.1 javaee-web-7.0 jpa-2.1 jax-rs-2.1.5 gf-appserver-4.1.2 eclipselink-2.1.3 jersey-2.0.5 jersey-2.1.7 23
- 24. Java EE 7 JSR Soup • Java Persistence API 2.1 – JSR 338 • JAX-RS 2.0 – JSR 339 • Servlets 3.1 – JSR 340 • Expression Language 3.0 – JSR 341 • Java EE 7 – JSR 342 • Java Message Service 2.0 – JSR 343 • Java Server Faces 2.2 – JSR 344 • EJB 3.2 – JSR 345 • CDI 1.1 – JSR 346 • JCache – JSR 107 • ... 24
- 25. Servlets 3.1 (JSR 340) http://jcp.org/en/jsr/detail?id=340 http://servlet-spec.java.net • Cloud support • Multi-tenancy • Security / Session state / Resources isolation • Asynchronous IO based on NIO2 • Simplified Asynchronous Servlets • Utilize Java EE concurrency utilities • Enable support for Web Sockets 25
- 26. JPA 2.1 (JSR 338) http://jcp.org/en/jsr/detail?id=338 http://jpa-spec.java.net ● Multi-tenancy ● Support for stored procedures, vendor function ● Update and Delete Criteria queries, JPQL ↔ Criteria ● Query by Example ● Support for schema generation ● Persistence Context synchronization control ● Dynamic definition of PU ● Additional event listeners 26
- 27. EJB 3.2 (JSR 345) http://jcp.org/en/jsr/detail?id=345 • Enablement for use in cloud • Factorization of the EJB technology • Interceptors was the first example • Container-managed transactions as target • Alignment with other specifications • Mark “pruned” technologies as optional • EJB 1.x and 2.x entity beans • Web service invocation using JAX-RPC 27
- 28. JAX-RS 2.0 (JSR 339) http://jcp.org/en/jsr/detail?id=339 http://jax-rs-spec.java.net ● Client API ● Low level using Builder pattern, Higher-level ● Hypermedia ● MVC Pattern ● Resource controllers, Pluggable viewing technology ● Bean Validation ● Form or Query parameter validation ● Closer integration with @Inject, etc. ● Server-side asynchronous request processing ● Server-side content negotiation 28
- 29. CDI 1.1 (JSR 346) http://www.jcp.org/en/jsr/proposalDetails?id=346 • Global ordering of interceptors and decorators • API for managing built-in contexts • Embedded mode to startup outside Java EE container • Send Servlet events as CDI events 29
- 30. Expression Language 3.0 (JSR 341) http://jcp.org/en/jsr/detail?id=341 http://el-spec.java.net • A JSR by itself • Make EL easier to use outside EE container • Simplified to use in Java SE • EL Context is split into Parsing and Evaluation context • Explicit coercion rules using API • Criteria-based selection from Collection • Operators: ==, concat, sizeof • CDI events for expression evaluation 30
- 31. JMS 2.0 (JSR 343) http://jcp.org/en/jsr/detail?id=343 http://jms-spec.java.net • Long overdue – after 9 years • Modest scope, major extensions deferred to a subsequent revision • Ease-of-development • Clarification of relationship with other Java EE specs • New mandatory API for pluggable JMS provider 31
- 32. Bean Validation 1.1 (JSR TBD) http://in.relation.to/Bloggers/JSRBeanValidation11WhatToPutIn • Integration with other specs • JAX-RS: Validate parameters on HTTP calls • JAXB: convert into XML schema descriptor • JPA: DDL generation • Method level validation public void processOrder(@Valid Order order, @Min(0) @Max(30) int retry) { } • @Valid and group propagation • Apply constraints on element collection 32
- 33. JSF 2.2 (JSR 344) http://jcp.org/en/jsr/detail?id=344 http://jsf-spec.java.net • Ease of development • cc:interface is optional • JSF lifecycle is CDI aware • Runtime configuration options change • Support implementation of Portlet Bridge 2.0 • Support for HTML5 features • Forms, Heading/Section content model, ... • New components like FileUpload and BackButton 33
- 34. Java EE 7 : Technology Refresh • Ease-of-development: JMS 2.0 • Latest web standards • New JSRs: Web Sockets, Java JSON API • HTTP Client API (JAX-RS 2.0) • Possible JSRs inclusion • Concurrency Utilities for Java EE (JSR 236) • JCache (JSR 107) 34
- 35. Transparency Checklist NEW http://jcp.org/en/resources/transparency • EG members names • EG business reported on publicly readable alias • Schedule is public, current and updated regularly • Public can read/write to a wiki • Discussion board on jcp.org • Public read-only issue tracker 35
- 36. Java EE 7 – When ? • Late 2012 • Date-driven release • Anything not ready will be deferred to Java EE 8 • Participate • Expert Groups forming • Public discussion lists • JCP membership free for individuals 36
- 37. GlassFish Server Distributions Distribution License Features • Java EE 6 compatibility GlassFish Server Open CDDL & • Web Profile support Source Edition 3.1 GPLv2 • In-memory replication / clustering Web Profile • Centralized Administration • Java EE 6 compatibility GlassFish Open Source CDDL & • Full Java EE distribution Edition 3.1 GPLv2 • In-memory replication / clustering • Centralized Administration • Adds Oracle GlassFish Server 3.1 Commercial • Oracle GlassFish Server Control Web Profile • Patches, support, knowledge base • Adds Oracle GlassFish Server 3.1 Commercial • Oracle GlassFish Server Control • Patches, support, knowledge base
- 38. References • oracle.com/javaee • glassfish.org • oracle.com/goto/glassfish • blogs.oracle.com/theaquarium • youtube.com/GlassFishVideos • Follow @glassfish 38
- 39. <Insert Picture Here> The Java EE 7 Platform: Developing for the Cloud Arun Gupta, Java EE & GlassFish Guy blogs.oracle.com/arungupta, @arungupta