Supporting Multi-tenancy Applications with Java EE

Transcription

1 Supporting Multi-tenancy Applications with Java EE Rodrigo Cândido da JavaOne 2014 CON4959

2 About Me Brazilian guy ;) Work for Integritas company Software Architect Java Platform JUG Leader of GUJavaSC Personal

3 Agenda Cloud Services Model SaaS Market Multi-tenancy Challenges Pros and Cons Implementation Types Java EE + Multi-tenancy Security + Multi-tenancy Cloud + Multi-tenancy Multi-tenancy at JVM

4 Cloud Services Model

5 SaaS Market

6 Multi-tenancy One application instance to multiple clients (tenant) Inverse of the multiple instances architecture

7 Multi-instances vs. Multi-tenant

8 Cloud!= Multi-tenancy

9 Challenges Data separation UI and business rules customization Access control by tenant Resource provisioning Integration Application update Failover tolerance

10 Pros and Cons Pros Low maintenance cost Same source code for all customers High scalability Sharing resources between customers Cons High complexity Separation by tenant-id More failure risks If code breaks -> breaks to all customers Low flexibility available to the customers

11 Multi-tenancy Implementation levels Level 1 (Customized) [N] applications and [N] databases Level 2 (Configurable) [1] application and [N] databases Level 3 (Efficient) [N] applications and [1] database Level 4 (Scalable) [1] application and [1] database

12 Level 1 - Customized [N] applications and [N] databases

13 Level 2 - Configurable [1] application and [N] databases

14 Level 3 - Efficient [N] applications and [1] database

15 Level 4 - Scalable [1] application and [1] database

16 Java EE + Multi-tenancy Database JPA + Multi-tenancy Customized UI JSF + Multi-tenancy Security Java EE 8 with Cloud support

17 JPA + Multi-tenancy EclipseLink Multi-tenancy support Multitenant default Shared Cache by tenant

18 = TENANT_ID, contextproperty = tenant-id ) public class Employee {... } HashMap properties = new HashMap(); properties.put("tenant.id", "707");... EntityManager em = Persistence.createEntityManagerFactory( "multi-tenant,properties).createentitymanager(); <persistence-unit name="multi-tenant">... <properties> <property name="tenant.id" value="707"/>... </properties> </persistence-unit>

19 EclipseLink TABLE_PER_TENANT <entity class="employee"> <multitenant type="table_per_tenant"> <tenant-table-discriminator type="schema" contextproperty="eclipselink.tenant-id"/> </multitenant> <table contextproperty="eclipselink.tenant-id") public class Employee {... }

20 EclipseLink VPD <properties> <property name="eclipselink.session.customizer" value="example.vpdsessioncustomizer" /> <property name="eclipselink.session-event-listener" value="example.vpdsessioneventadapter" /> <property name="eclipselink.jdbc.exclusive-connection.mode" value="always" /> </properties> CALL DBMS_RLS.ADD_POLICY ('SCOTT', 'TASK', 'todo_list_policy', 'SCOTT', 'ident_func', 'select, @TenantDiscriminatorColumn(name = "USER_ID", contextproperty = public class Task implements Serializable {...

21 JPA Caching Shared Cache disabled

22 JPA Caching Shared Cache by tenant

23 JSF + Multi-tenancy Flexible software architecture Artifacts packaged in separated JAR s Composition at runtime Templates and contracts Resource library Look-and-feel customization RenderKit support Localization support

24 JSF Facelets Template File name _template.html Site Navigation The Facelets Gazette Insertion points Events Docs Forums About Contact Site Map Resources css classes, scripts, images

25 JSF Multi-templating <web-app-root>/contracts contracta Declared contractb Templates Declared Insertion Points Declared Declared contractc Resources Templates Declared Insertion Points Declared Declared Resources Templates Declared Insertion Points Declared Resources JAR files in WEB-INF/lib contractd Declared contracte Templates Declared Insertion Points Declared Declared contractf Resources Templates Declared Insertion Points Declared Declared Resources Templates Declared Insertion Points Declared Resources <web-app-root>/contracts JAR files in WEB-INF/lib contracta Declared contractb Templates Declared Insertion Points Declared Declared contractc Resources Templates Declared Insertion Points Declared Declared Resources Templates Declared Insertion Points Declared Resources contractd Set of available contracts Declared contracte Templates Declared Insertion Points Declared Declared contractf Resources Templates Declared Insertion Points Declared Declared Resources Templates Declared Insertion Points Declared Resources faces-config.xml Facelet 1 Facelet 2 Facelet 3

26 JSF Multi-templating <html xmlns=" xmlns:h=" xmlns:ui=" facelets"> <body> <ui:composition template="#{template} >... </ui:composition> </body> </html> <?xml version="1.0" encoding="utf-8"?> <web-app> <context-param> <param-name>javax.faces.view.template</paramname> <param-value>mybusiness</param-value> </context-param> </web-app>

27 Security + Multi-tenancy PicketLink Java EE security framework Identity Management (IDM) Federation support (SAML, OAuth2, OpenID) Social Login support Multi-tenancy support

28 Picketlink

29 public class RealmSelector implements Serializable private PartitionManager partitionmanager; private Realm public Realm select() { return this.realm; public class LoginController private Identity identity; public String login() { this.identity.login(); } } public String logout() { this.identity.logout(); return "/home.xhtml"; } public class Resources { public enum REALM {acme, public Enum[] supportedrealms() { return REALM.values(); }

30 Cloud + Multi-tenancy Namespace API com.google.appengine.api.namespacemanager Cloud services support Google Datastore Memcached Task Queue Search

31 Namespace API // Assuming there is a logged in user. namespace = UserServiceFactory.getUserService().getCurrentUser().getUserId(); NamespaceManager.set(namespace); // Filter to set the Google Apps // domain as the namespace. public class NamespaceFilter implements javax.servlet.filter public void dofilter(servletrequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { // Make sure set() is only called if the current namespace is not already set. if (NamespaceManager.get() == null) { NamespaceManager.set(NamespaceManager.getGoogleAppsNamespace()); } } } <filter> <filter-name>namespacefilter</filter-name> <filter-class>package.namespacefilter</filter-class> </filter> <filter-mapping> <filter-name>namespacefilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>

32 Namespace API Search // Set the current namespace to "aspace" NamespaceManager.set("aSpace"); // Create a SearchService with the namespace "aspace" SearchService searchservice = SearchServiceFactory.getSearchService(); " Memcached // Create a MemcacheService that uses the namespace "abc". MemcacheService explicit = MemcacheServiceFactory.getMemcacheService("abc"); explicit.put("key", value); // stores value in namespace "abc" " Task Queue // Increment the count for the current namespace asynchronously. QueueFactory.getDefaultQueue().add( TaskOptions.Builder.url("/_ah/update_count").param("countName", "SomeRequest"));

33 Demo Java EE Multi-tenancy sample

34 Questions?

35 References

36 Thank rodrigocandido.me