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Frederick Cummings
5 years ago
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1 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. 1 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

Java Persistence in the Cloud Shaun Smith shaun.smith@oracle.

4 Application Development and the Cloud Today Single Tenant or non-tenant Applications Dedicated application instance and database Future Support multiple tenants Support extensibility (custom fields per tenant) Support various deployment architectures Dedicated or shared application instances Dedicated or shared databases 4 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

5 Developing for the Cloud? What is the Cloud? Infrastructure - IaaS Platform - PaaS Software SaaS What is a tenant? Persistence Challenges Same application used for multiple tenants Flexible domain models: Extensibility Multiple deployment architectures Shared versus Isolated container and database 5 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

6 Java Persistence: The Problem Space Customer id: int name: String creditrating: int Java JAXB/SDO <customer id= > <name> </name> </contact-info> </customer> XML JPA DBWS CUST ID NAME C_RATING Relational JPA: Java Persistence API JAXB: Java Architecture for XML Binding SDO: Service Data Objects 6 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

8 Multitenant Topologies Application Dedicated Shared T1 T2 T3 T1 T2 T3 Database Dedicated Shared T1 T2 T T1 T2 T Note: Single application deployed to support various MT architectures 8 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

9 Multitenant: Dedicated Application Dedicated DB Dedicated application Instance Application instance per tenant unique container or application class-loader Caching supported Dedicated database Unique tables (tablespace/schema/db) per tenant Tenant specific data source required T1 T2 T Copyright 2011, Oracle and/or its affiliates. All rights reserved.

10 Multitenant: Shared App Dedicated DB Shared Application Instance Application instances handle multiple tenants Caching must isolate by tenant Dedicated Database Common data source Unique schema/tablespace per tenant Common schema with table per tenant (partitioning) Proxy Authentication Data source per tenant T1 T2 T Copyright 2011, Oracle and/or its affiliates. All rights reserved.

11 Shared Application s persistence layer manages access Row data includes tenant identifier values Queries augmented to limit results based on current tenant Database vendor Row data includes tenant identifier values Database provides client limited view of database tables Shared solution for all database clients Native queries (SQL) supported T1 T2 T T1 T2 T Copyright 2011, Oracle and/or its affiliates. All rights reserved.

12 Tenant Customized Applications Multitenant Tenant Shared Schema or Tenant per Schema Tenant Specific Extensions Deployment Customization External metadata overrides Cached metadata Composite Persistence Units 12 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

13 Multitenant Entity Types Support storage of entities from multiple tenants in a shared - SINGLE_TABLE + includecriteria=false SET_IDENTIFIER(property) & CLEAR_IDENTIFIER DDL Gen of predicate function and 13 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

14 In the beginning Application dedicated for tenant All rows available to MYS_PLAYER ) public class Player { MYS_PLAYER EMP_ID VERSION F_NAME L_NAME GENDER LEAGUE 1 1 John Doe M HTHL 2 3 Jane Doe F OSL 14 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

15 Multitenant: SINGLE_TABLE Simple configuration: Annotation or XML Flexible tenant identifier support EclipseLink augments league-id, columnname= LEAGUE ) public class Player { MYS_PLAYER EMP_ID VERSION F_NAME L_NAME GENDER LEAGUE 1 1 John Doe M HTHL 2 3 Jane Doe F OSL 15 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

16 Multitenant using Oracle VPD Leverage the league-id, columnname= LEAGUE ) public class Player { MYS_PLAYER EMP_ID VERSION F_NAME L_NAME GENDER LEAGUE 1 1 John Doe M HTHL 2 3 Jane Doe F OSL 16 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

17 Multitenant: TENANT_PER_TABLE public class Player { HTHL.MYS_PLAYER EMP_ID VERSION F_NAME L_NAME GENDER 1 1 John Doe M OSL.MYS_PLAYER EMP_ID VERSION F_NAME L_NAME GENDER 2 3 Jane Doe F 17 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

18 Multi-Tenancy at Runtime DEPLOY league-id=1 App JPA EMF <<app singleton>> App Services EntityManager EntityManager <<per <<per app app txn>> txn>> <<per app txn>> SELECT * FROM MYS_PLAYER WHERE L_NAME = Doe AND LEAGUE = 1 18 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

19 Domain Model Extensions Storage and querying of extended properties Application developer enables extensions in entity Schema created with extension columns/table(s) Application Admin stores extension definitions Application instances made aware of extension definitions Application users make use of extensions Employee id firstname lastname extensions * Map<String, Object> name value 19 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

20 Tenant/Extension Metadata Management App Users App Admin Create/Update/Remove Extension Definitions App EclipseLink deploy runtime Metadata Repository 20 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

21 Flex public class private Map<String, Object> attributes; public <T> T get(string attributename) { return (T) this.attributes.get(attributename); } public Object set(string attributename, Object value) { return this.attributes.put(attributename, value); } MYS_PLAYER EMP_ID F_NAME L_NAME FLEX_1 FLEX_2 1 John Doe R 22 2 Jane Smith NONE 21 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

22 Definition: Virtual Access Mappings <entity class="example.mysports.model.player"> <attributes> <basic name="penaltyminutes" access="virtual" attribute-type="java.lang.integer"> <column name="flex_1"/> </basic> <basic name="position" access="virtual" attribute-type="java.lang.string"> <column name="flex_2"/> </basic> </attributes> </entity> 22 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

23 MySports Demo Introduced in EclipseLink Indigo (Extensions per Tenant) External Metadata Sources JSF, EJB, JPA Admin: JSF + JAX-RS + JPA Wiki 23 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

25 MySports Architecture Users JSF EJB/JPA EclipseLink deploy REST -> <- XML Admin Admin App JSF/JAX-RS/EJB/JPA EclipseLink Create/Update/Remove Extension Definitions Metadata Repository 25 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

26 Summary: Java Persistence in the Cloud Starting thinking about SaaS and PaaS in your applications Java EE 7 and the Cloud Call to Action Try it out Download EclipseLink Indigo (2.3.0) Release Candidates Try out the MySports Demo wiki.eclipse.org/eclipselink/examples/mysports Provide Feedback, Get Involved! 26 Copyright 2011, Oracle and/or its affiliates. All rights reserved.

TopLink Grid: Scaling JPA applications with Coherence

TopLink Grid: Scaling JPA applications with Coherence Shaun Smith Principal Product Manager shaun.smith@oracle.com Java Persistence: The Problem Space Customer id: int name: String