![Window-Context
Window(-Context)
API and SPI
[Scope] [Scope] [Scope] [Scope] [Scope]
Window Conversation Conversation View- View-
Group: Group: Access Access
Bean1 UseCase1
Bean 3
Bean 4
Bean 1
Bean 2
Bean 1
Bean 1
Bean 2
Attributes](https://image.slidesharecdn.com/myfacescodiconversations-110415090110-phpapp01/85/MyFaces-CODI-Conversations-28-320.jpg)
MyFaces CODI Conversations
- 1. MyFaces CODI Scopes Use the right scopes for your CDI beans
- 2. Agenda • The History • CODI in a Nutshell • CODI Setup • CODI Scopes in Action • Coding • CODI Conversation - Insights • Your Use-Cases
- 3. THE HISTORY
- 4. Scopes of the Servlet Spec Application Session Custom Scopes Request
- 5. CODI Scope Overview Application Session Window Conversation View-Access Request
- 6. Why custom Scopes? • Request scope too short for most UI-Use-Cases • Session scope – Too long – No support for multi-window applications • Different (conversation) concepts available – MyFaces Orchestra – CDI Conversation Scope – MyFaces CODI Scopes • Conversation Scope • View-Access Scope • Window Scope
- 7. MyFaces Orchestra • CODI is NOT Orchestra.NEXT • Orchestra is for Spring (only) • CODI is for CDI (only) • Orchestra introduced great concepts! CODI was planned as "type-safe Orchestra" for CDI Now it’s way more (in most areas) but without Persistence-Management!
- 8. What‘s about @ConversationScoped of CDI? • Completely broken for several use-cases! • More like inflexible sessions per window • Some of the disadvantages – Overhead e.g. with failed conversion/validation – Lazy termination (after the rendering process) – Restarting conversations during a request isn’t possible – End the whole conversation or nothing – An explicit start is required – Manual check if conversation has been started • Test them with your use-cases! use them or forget them
- 9. MyFaces CODI - Overview • MyFaces Extensions CDI aka MyFaces CODI is a portable CDI extension which can be used with Apache OpenWebBeans, JBoss Weld,… and in combination with other portable CDI extensions • CODI-Core is required in any case • Modules – JSF Module (for 1.2 and 2.0 and 2.1) – JPA Module – BV Module – I18n-Message Module – Scripting Module – Test Support Modules
- 10. MyFaces CODI in a Nutshell • JSF 1.2 and 2.x • Type-safe View-Configs • Type-safety • Type-safe Navigation • Extensibility • JPA Integration • Advanced Scopes • Dependency Injection • Various Events Support for BV • View-Controller • Advanced I18n • JSF 2 Scope Mappings • Scripting Integration • And more!
- 11. CODI - SETUP
- 12. Getting CODI up and running • Add CODI to the project – With Maven • Add the modules (or the all-in-one package) to the POM – Without Maven • Download the current dist package • Add the modules (or the all-in-one package) to the Classpath of the project • Start using it! Hint: mvn archetype:generate -DarchetypeCatalog=http://myfaces.apache.org
- 13. Getting CODI up and running - Hints • With JEE 5 and Mojarra use the controlled bootstrapping add-on • Attention (hint for all bean archives): Ensure that the libs aren’t duplicated – otherwise the CDI implementation will blame ambiguous interceptors, beans,…
- 14. CODI SCOPES IN ACTION
- 15. CODI Scopes (with OWB) - Performance
- 16. Request Scope (as a Comparison) - Details - 2
- 17. Request Scope (as a Comparison) - Details - 1
- 18. Window-Scope • Like an advanced session per Browser-Window/Tab • Use it e.g. instead of @SessionScoped • Starts automatically with the first access • No support for (CODI conversation-)groups • Example: @WindowScoped public class PreferencesBean implements Serializable { //... }
- 19. View-Access Scope • The next page does not use a view-scoped bean the bean get un-scoped • Simple alternative to @ConversationScoped (of CODI) • Starts automatically with the first access • No support for (CODI conversation-) groups • Example @ViewAccessScoped public class RegistrationWizard implements Serializable { //... }
- 20. (Grouped) Conversations • Every bean is isolated in a separated conversation • The bean class is the implicit group • Terminating a conversation un-scopes all beans connected with the conversation (per default 1) immediately • Termination manually via API or automatically via timeout • Starts automatically with the first access • Example @ConversationScoped public class OrderWizard implements Serializable { //... }
- 21. Grouped Conversations - 1 • Grouping beans which belong to a logical conversation (e.g. a Use-Case) can be grouped together • One bean can be used for multiple (parallel) use-cases • @ConversationGroup is a "special" CDI qualifier • Termination of the group un-scoping of all bean(s) • Example 1 @ConversationScoped @ConversationGroup(OrderUseCase.class) public class Customer implements Serializable { //... }
- 22. Grouped Conversations - 2 @Produces @ConversationScoped @ConversationGroup(UseCase1.class) public DemoBean createDemoBeanForUseCase1() { return new DemoBean("createDemoBeanForUseCase1"); } @Produces @ConversationScoped @ConversationGroup(UseCase2.class) public DemoBean createDemoBeanForUseCase2() { return new DemoBean("createDemoBeanForUseCase2"); }
- 23. Closing vs. Restarting Conversations - 1 • Conversation#close Closes a conversation immediately • Conversation#restart Un-scopes all beans of the conversation but internal data-structures are intact for using it again (better performance) • Example @Inject private Conversation conversation; //... this.conversation.close();
- 24. @CloseConversationGroup • @CloseConversationGroup Interceptor for closing a conversation group e.g. after a method-invocation or based on a given exception. • Examples: @CloseConversationGroup public void registerUser () {} @CloseConversationGroup(group = UseCase1.class) public void registerUser () {} @CloseConversationGroup( group = UseCase1.class, on = MyException.class) public void registerUser () {}
- 25. CODI CONVERSATION - INSIGHTS
- 26. Optional Configuration • CodiConfig – WindowContextConfig • getWindowContextTimeoutInMinutes • isUnknownWindowIdsAllowed • getMaxWindowContextCount • isCloseEmptyWindowContextsEnabled • is*EventEnabled • … – ConversationConfig • getConversationTimeoutInMinutes • is*EventEnabled • … – …
- 27. WindowScoped vs WindowContext • The Window-Context represents the whole window including all scopes which are bound to it • Window-scoped beans are just a part of the current window • WindowContext API allows to manage the current window • Example @Inject private WindowContext windowContext; //... this.windowContext.getId(); this.windowContext.closeConversations();
- 28. Window-Context Window(-Context) API and SPI [Scope] [Scope] [Scope] [Scope] [Scope] Window Conversation Conversation View- View- Group: Group: Access Access Bean1 UseCase1 Bean 3 Bean 4 Bean 1 Bean 2 Bean 1 Bean 1 Bean 2 Attributes
- 29. Powerful SPI • WindowContextManagerFactory • WindowContextFactory • WindowContextQuotaHandler • WindowHandler • ConversationFactory • WindowContextManager • BeanEntryFactory • …
- 30. Optional Events • WindowContextEvent – CreateWindowContextEvent – CloseWindowContextEvent • ConversationEvent – StartConversationEvent – RestartConversationEvent – CloseConversationEvent • BeanEvent – ScopeBeanEvent – AccessBeanEvent – UnscopeBeanEvent
- 31. TELL US YOUR USE-CASES!
- 32. Links • http://myfaces.apache.org/extensions/cdi/ • https://cwiki.apache.org/confluence/display/EXTCDI/Index • https://svn.apache.org/repos/asf/myfaces/extensions/cdi/ • http://twitter.com/MyFacesTeam • http://myfaces.apache.org/extensions/cdi/mail-lists.html • Recommended – http://openwebbeans.apache.org – http://code.google.com/a/apache-extras.org/p/ myfaces-codi-addons/ – http://os890.spaaze.com/myfaces-codi