Jfokus 2012 : The Java EE 7 Platform: Developing for the Cloud

Java EE 7: Developing for the Cloud
Arun Gupta, Java EE & GlassFish Guy
1 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.

The following 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.


Java EE 6 Platform
December 10, 2009


Java EE 6 – Key Statistics

•  40+ Million Java EE 6 Component Downloads
•  #1 Choice for Enterprise Developers
•  #1 Application Development Platform
•  Fastest implementation of a Java EE release


Top Ten Features in Java EE 6
1.  EJB packaging in a WAR
2.  Servlet and CDI extension points
3.  Optional web.xml!
4.  Type-safe dependency injection
5.  CDI Events
6.  JSF standardizing on Facelets
7.  EJBContainer API
8.  @Schedule!
9.  EJB No Interface View
10. Web Profile

Today’s Cloud Offerings are all Proprietary

Infrastructure as Platform as Software as
a Service a Service a Service


Java EE 7


Java EE 7 and 8 – Focus Areas

Cloud Modularity HTML5
•  Provisioning •  Building on Jigsaw •  Emerging Web
Standards require a
•  Elastic & Autonomic •  Focus on OSGi interop programming model
Scalability
•  Supporting Profiles & •  JSON, WebSockets,
•  Multi-Tenancy Modular Applications off-line, APIs & DOM


Java EE 7 Focus: Platform as a Service

•  Next logical step for Java EE
–  J2EE à Java EE 6 : The Java EE Platform provides services
–  Java EE 7 : The Java EE Platform IS a service

•  PaaS support entails evolutionary change

•  Provide way for customers and users to leverage public,
private, and hybrid clouds


Java EE 7 PaaS Roadmap
•  Define new platform roles to accommodate PaaS model
•  Add metadata
–  For service provisioning and configuration
–  For QoS, elasticity
–  For sharing of applications and resources
–  For (re)configurability and customization
•  Add useful APIs for cloud environment
–  JAX-RS client API, Caching API, State Management, JSON,…
•  Extend existing APIs with support for multi-tenancy

Roles

Developer
PaaS Provider

PaaS
Customer/ JVM JVM JVM JVM JVM JVM JVM JVM JVM
Tenant Machine Machine Machine PaaS Product
Provider

JVM JVM JVM JVM JVM JVM JVM JVM JVM
Deployer
Machine Machine Machine PaaS Account
Tenant 1 Tenant 2 Tenant 3 Manager
Application
Submitter
PaaS
Administrator
Application
Administrator


Existing Java EE model
Database
1
Provision and Initialize Service
•  Configure Java EE resources –
JDBC, JMS etc LDAP
Service
•  Deploy Application EAR
2
Provision and Initialize

Messaging
3
Service

Application
4

Container

5
Deploy Application (EAR/
GAR/SAR …)


Java EE 7 Model: Auto-Provision Services
from Application Dependencies
•  Provision and deploy application 1
Provision and Initialize Cloud Administration Service

resources (e.g. LDAP stripe, data
source instantiation and Database
Service
connection …) 2

•  Extensible Deployment Models LDAP
Supporting Multiple Frameworks 3
Provision and Initialize Service
•  Spring, Seam, Play …
Messaging
4

Service

Application
5
Deploy Application (EAR/
GAR/SAR …)
Container


Services

•  Cloud apps consume services
–  Persistence, queueing, mail, caching, …
•  Service metadata facilitates ease of use when deploying
into the cloud
@DataSourceDefinition(!
name=“java:app/jdbc/myDB”,!
className=“oracle.jdbc.pool.OracleDataSource”,!
isolationLevel=TRANSACTION_REPEATABLE_READ,!
initialPoolSize=5!
) !


Services

into the cloud
@JMSConnectionFactory (!
name=“java:app/myJMSConnectionFactory”,!
resourceType=“javax.jms.QueueConnectionFactory”) !
!
@JMSDestination(!
name=“java:app/myQueue”,!
resourceType=“javax.jms.Queue”)!


Services

into the cloud
@MailSession (!
name=“java:app/mailSession”,!
from=“MyService@ExtraServices.com”!
) !


Services

into the cloud
@ConnectorService (!
name=“java:app/myCustomConnector”,!
type=“com.extraServices.customConnector.class”,!
properties = {…}!
) !


Elasticity
Java EE 7 Focus:
Move the Bar Right

Elasticity Continuum

Java EE Cluster Elastic Cluster
Elastic Cluster
Capacity
Ca
on Demand

Single node Java EE Multi-Node Dynamic Self Adjusting
Non-Elastic Multi-Instance Clustering SLA Driven Elasticity

•  Service Levels
•  Minimum and Maximum Instances
•  Futures – Self Adjustment, Capacity On Demand

Example Scenario

“A software company writes an application, submits it to a
PaaS provider, then any number of tenants sign up for the
application, deploy it, their end users access it”


Walkthrough (1)
SimplyCRM
DiabloCloud


Walkthrough (2)
SimplyCRM
DiabloCloud

Applica3on

Developer

Writes

App


Walkthrough (3)
SimplyCRM
DiabloCloud

Signs up as a customer
PaaS
Customer
PaaS
Account
Manager


Walkthrough (4)
SimplyCRM
DiabloCloud

Submits the application
Application System
Administrator

Submitter

App


Walkthrough (5)
ExtraServices
DiabloCloud

Discovers
App


Walkthrough (6)
ExtraServices
DiabloCloud

Signs up as a customer
PaaS
Customer
PaaS
Account
Manager

App


Walkthrough (7)
ExtraServices
DiabloCloud

Deployer
System
Administrator

Customizes and
deploys the application

App


Walkthrough (8)
ExtraServices
DiabloCloud

Deployer
System
Administrator

Provisions on
Cloud
infrastructure

App


Walkthrough (9)
ExtraServices
DiabloCloud

Deployer
System
Administrator

Provisioned and
Deployed App


Walkthrough (10)
ExtraServices
DiabloCloud

Access the application
End-‐Users
Provisioned and
Deployed App


Walkthrough (11)
ExtraServices
DiabloCloud

End-‐Users

Provisioned and
Deployed App

Administrator
Administers the application


Walkthrough (12)
ExtraServices
DiabloCloud

System
Administrator

Monitors

End-‐Users

Provisioned and
Deployed App

Administrator
Administers the application


Demo
PaaSing a Java EE Application in the Cloud

glassfish.org/javaone2011


Conference Planning in the Cloud

Java EE Application

JSF JPA Deploy

Services
EJB Metadata
<glassfish-services> 
<service-description init-type="LB" name="ConferencePlanner-lb"> 
<template id="LBNative"/> 
<configurations> 
<configuration name="https-port" value="50443"/> 
<configuration name="ssl-enabled" value="false"/> 
<configuration name="http-port" value="50080"/> 
</configurations></service-description> 
<service-description init-type="JavaEE" name="ConferencePlanner"> 
<characteristics> 
<characteristic name="service-type" value="JavaEE"/> 
</characteristics> 
<configurations> 
<configuration name="max.clustersize" value="4"/> 
<configuration name="min.clustersize" value="2"/> 
</configurations> 
</service-description>!
. . . 
</glassfish-services>!


Service Provisioning

Load
Balancer

Java EE Java EE ... Java EE

Database


Multi-tenancy in Java EE 7
•  Support for separate isolated instances of the same app for
different tenants
–  One application instance per tenant
–  Tenants correspond to units of isolation
–  Multitenant apps are declared as such
–  Each instance customized and deployed for a single tenant
–  Limited form of SaaS

•  Mapping to tenant done by the container
•  Tenant id available to application
–  E.g., under java:comp/tenantId!


Java EE 7 Is Not Just Cloud-y
•  Alignment of ManagedBeans across CDI, EJB, JSF, …
–  POJO à ManagedBean à Enterprise JavaBean
–  Extension of container-managed transactions beyond EJB

•  Further simplifications for ease-of-development
–  JAX-RS 2.0 Client API, hypermedia, bean validation, …
–  JMS 2.0 focus on ease-of-development
–  Expanded use of dependency injection
–  Expanded service metadata; improved configuration

•  Pruning
–  EJB CMP and BMP, JAX-RPC, Deployment API
•  Update to Web Profile


Java EE 7 – Candidate JSRs

Web Jcache 1.0
JAX-RS JSP 2.2
Container
2.0 JSF 2.2 (JSR 107)
CDI Extensions EL 3.0
Extensions

Bean Validation 1.1
Concurrency
Servlet 3.1 Utilities 1.0

State
CDI 1.1 / Interceptors 1.1 / JSR 250 1.1 Management 1.0

Batch
Managed Beans 1.0 EJB 3.2 Processing 1.0

JPA 2.1 JTA 1.1 JMS 2.0 JSON 1.0


Java Persistence API 2.1

•  @NamedStoredProcedureQuery,
StoredProcedureQuery!
•  Bulk update/delete using Criteria!
•  User-defined functions using FUNCTION!
•  Persistence Context Synchronization


Java API for RESTful Web Services 2.0

•  Client-side API
•  Validation
•  Hypermedia
•  Alignment with CDI
•  Server-side content negotiation (qs)
•  Filters and Entity Interceptors
•  Client-side and Server-side Async


JavaServer Faces 2.2

•  Queue control for Ajax requests
•  File Upload component (Non-Ajax & Ajax)
•  Injection in all JSF artifacts – including converters &
validators
•  @FaceletsResourceResolver!
•  Instantiating composite components in Java
•  . . .


Contexts & Dependency Injection 1.1

•  Embedded mode to startup outside Java EE container
•  Global ordering of interceptors and decorators
•  API for managing built-in contexts
•  Send Servlet events as CDI events
•  . . .


Enterprise JavaBeans 3.2

•  Three-part specification
–  Core CMT transactions on Managed Beans, Non-persistent timer
and Async method to Lite
–  Optional Entity Beans, JAX-RPC Web service endpoint
–  Interceptors
•  Alignment with JMS 2.0


Transparency
•  Oracle’s Java EE 7 JSRs are run in the open on java.net
–  http://javaee-spec.java.net
–  One project per spec – e.g., jpa-spec, jax-rs-spec, jms-spec…
•  Publicly viewable Expert Group mail archive
–  Users observer list gets copies of all Expert Group emails
•  Publicly viewable download area
•  Publicly viewable issue tracker
•  Commitment to update to JCP 2.8 Process


Status and Schedule

•  All JSRs up and running
•  Early Drafts: JSF 2.2, JAX-RS 2.0, JPA 2.1, CDI 1.1, EJB 3.2
•  Final release target: Q3 2012
•  Date-driven release: Anything not ready will be deferred to
Java EE 8


GlassFish Roadmap
GlassFish v3 GlassFish Server 3.1 GlassFish Server 3.1.2
•  Java EE 6 support •  Centralized administration •  Bug Fixes
•  Single instance •  Clustering / HA •  Incremental features
•  GlassFish Enterprise Mgr •  GlassFish Server Control

2009 2010 2011 2012

GlassFish Server 3.0.1 GlassFish Server 3.1.1 GlassFish Server 4
•  Oracle branding •  Bug fixes •  Java EE 7
•  Oracle platform support •  Updated components •  Multitenancy
•  Oracle interoperability •  Incremental features •  PaaS-enablement


Call to Action

•  Java EE 7 Expert Group Project
– http://javaee-spec.java.net
•  Java EE 7 Reference Implementation
– http://glassfish.org
•  The Aquarium
–  http://blogs.oracle.com/theaquarium


Java EE 7: Developing for the Cloud
Arun Gupta, Java EE & GlassFish Guy
blogs.oracle.com/arungupta, @arungupta,
arun.p.gupta@oracle.com

Jfokus 2012 : The Java EE 7 Platform: Developing for the Cloud

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