jfokus 2012 : the java ee 7 platform: developing for the cloud
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1 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Java EE 7: Developing for the Cloud Arun Gupta, Java EE & GlassFish Guy
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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.
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Java EE 6 Platform December 10, 2009
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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
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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
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Today’s Cloud Offerings are all Proprietary
Infrastructure as a Service
Platform as a Service
Software as a Service
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Java EE 7
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Java EE 7 and 8 – Focus Areas
Cloud
• Provisioning
• Elastic & Autonomic Scalability
• Multi-Tenancy
Modularity
• Building on Jigsaw
• Focus on OSGi interop
• Supporting Profiles & Modular Applications
HTML5
• Emerging Web Standards require a programming model
• JSON, WebSockets, off-line, APIs & DOM
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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
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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
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Roles
Developer
PaaS Customer/
Tenant
Application Submitter
Application Administrator
PaaS Provider
PaaS Product Provider
PaaS Account Manager
PaaS Administrator
Deployer
Tenant 1 Tenant 2 Tenant 3
Machine
JVM
JVM
JVM
Machine
JVM
JVM
JVM
Machine
JVM
JVM
JVM
Machine
JVM
JVM
JVM
Machine
JVM
JVM
JVM
Machine
JVM
JVM
JVM
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Existing Java EE model
• Configure Java EE resources – JDBC, JMS etc
• Deploy Application EAR
Database Service 1
2
4
5
LDAP Service
Provision and Initialize
Provision and Initialize
Provision and Initialize
Provision and Initialize
3
Messaging Service
Application Container
Deploy Application (EAR/GAR/SAR …)
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Java EE 7 Model: Auto-Provision Services from Application Dependencies
• Provision and deploy application resources (e.g. LDAP stripe, data source instantiation and connection …) • Extensible Deployment Models
Supporting Multiple Frameworks • Spring, Seam, Play …
Database Service
Cloud Administration Service 1
2
4
5
LDAP Service
Provision and Initialize
Provision and Initialize
Provision and Initialize
Provision and Initialize
3
Messaging Service
Application Container Deploy Application (EAR/
GAR/SAR …)
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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!
) !
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Services
• Cloud apps consume services – Persistence, queueing, mail, caching, …
• Service metadata facilitates ease of use when deploying into the cloud @JMSConnectionFactory (!
name=“java:app/myJMSConnectionFactory”,!
resourceType=“javax.jms.QueueConnectionFactory”) !!
@JMSDestination(!
name=“java:app/myQueue”,!
resourceType=“javax.jms.Queue”)!
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Services
• Cloud apps consume services – Persistence, queueing, mail, caching, …
• Service metadata facilitates ease of use when deploying into the cloud @MailSession (!
name=“java:app/mailSession”,!
from=“[email protected]”!) !
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Services
• Cloud apps consume services – Persistence, queueing, mail, caching, …
• Service metadata facilitates ease of use when deploying into the cloud @ConnectorService (!
name=“java:app/myCustomConnector”,!
type=“com.extraServices.customConnector.class”,! properties = {…}!) !
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Elasticity
• Service Levels • Minimum and Maximum Instances • Futures – Self Adjustment, Capacity On Demand
Elasticity Continuum
Single node Non-Elastic
Dynamic Self Adjusting SLA Driven Elasticity
Java EE Multi-Node Multi-Instance Clustering
Java EE 7 Focus: Move the Bar Right
Java EE Cluster Ca
Elastic Cluster Capacity
on Demand
Elastic Cluster
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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”
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Walkthrough (1) DiabloCloud SimplyCRM
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Walkthrough (2) SimplyCRM
Applica3on Developer
App
Writes
DiabloCloud
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Walkthrough (3)
PaaS Account Manager PaaS Customer Signs up as a customer
SimplyCRM DiabloCloud
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Walkthrough (4)
Application Submitter
App
Submits the application System Administrator
SimplyCRM DiabloCloud
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Walkthrough (5) ExtraServices
App Discovers
DiabloCloud
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Walkthrough (6)
PaaS Customer Signs up as a customer
DiabloCloud ExtraServices
PaaS Account Manager
App
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App
Walkthrough (7)
Deployer Customizes and deploys the application
DiabloCloud ExtraServices
System Administrator
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App
Walkthrough (8)
Provisions on Cloud
infrastructure
DiabloCloud ExtraServices
System Administrator Deployer
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Walkthrough (9)
Provisioned and Deployed App
DiabloCloud ExtraServices
System Administrator Deployer
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Walkthrough (10)
End-‐Users Access the application
DiabloCloud ExtraServices
Provisioned and Deployed App
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Walkthrough (11)
End-‐Users Access the application
Administrator Administers the application
DiabloCloud ExtraServices
Provisioned and Deployed App
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Walkthrough (12)
Monitors
DiabloCloud ExtraServices
System Administrator
End-‐Users Access the application
Administrator Administers the application
Provisioned and Deployed App
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Demo PaaSing a Java EE Application in the Cloud
glassfish.org/javaone2011
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Conference Planning in the Cloud
Java EE Application
Deploy
EJB Services Metadata
JSF JPA
<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>!
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Service Provisioning
Database
Java EE Java EE Java EE . . .
Load Balancer
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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!
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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
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Java EE 7 – Candidate JSRs
JPA 2.1
Managed Beans 1.0 EJB 3.2
CDI 1.1 / Interceptors 1.1 / JSR 250 1.1
Servlet 3.1
CDI Extensions
JSP 2.2 EL 3.0 JSF 2.2 JAX-RS
2.0 Web
Container Extensions
Bea
n Va
lidat
ion
1.1
JMS 2.0
Jcache 1.0 (JSR 107)
Concurrency Utilities 1.0
State Management 1.0
Batch Processing 1.0
JSON 1.0 JTA 1.1
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Java Persistence API 2.1
• @NamedStoredProcedureQuery, StoredProcedureQuery!
• Bulk update/delete using Criteria!• User-defined functions using FUNCTION!• Persistence Context Synchronization
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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
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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 • . . .
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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 • . . .
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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
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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
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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
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GlassFish Roadmap
2009 2010 2011
GlassFish Server 3.1.2 • Bug Fixes • Incremental features
GlassFish Server 3.1 • Centralized administration • Clustering / HA • GlassFish Server Control
2012
GlassFish Server 4 • Java EE 7 • Multitenancy • PaaS-enablement
GlassFish v3 • Java EE 6 support • Single instance • GlassFish Enterprise Mgr
GlassFish Server 3.0.1 • Oracle branding • Oracle platform support • Oracle interoperability
GlassFish Server 3.1.1 • Bug fixes • Updated components • Incremental features
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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
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Java EE 7: Developing for the Cloud Arun Gupta, Java EE & GlassFish Guy blogs.oracle.com/arungupta, @arungupta, [email protected]
48 Copyright © 2012, Oracle and/or its affiliates. All rights reserved.