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Generic CRUD Service aka DAO - EJB 3.1/0 Code - Only If You Really Needed : Adam Bien's... - 0 views

www.adam-bien.com/...generic_crud_service_aka_dao javaee6 patterns GenericCrudService DAO ejb3.1
shared by kuni katsuya on 12 Oct 12 - Cached
  • Generic CRUD Service
  • The term Data Access Object (DAO)
  • is actually wrong
    • kuni katsuya
      kuni katsuya on 12 Oct 12
       
      this is one reason i hate using the term 'dao' in our ee6 project
  • ...7 more annotations...
  • easy with generics
  • create
  • find(
  • update(
  • delete(
  • CrudService
  • @TransactionAttribute(TransactionAttributeType.MANDATORY)
22More

Dependency injection discourages object-oriented programming? @ Blog of Adam Warski - 0 views

www.warski.org/...es-object-oriented-programming java javaee6 CDI CdiDependencyInjection OO Object-Oriented procedural DI DependencyInjection
shared by kuni katsuya on 12 Dec 12 - No Cached
  • Dependency injection discourages object-oriented programming?
  • if you’re using DI, and you have an X entity, do you have an XService or XManager with lots of method where X is the first argument?
    • kuni katsuya
      kuni katsuya on 12 Dec 12
       
      evidence of the anti-pattern of procedural design in a java ee6 cdi application
  • previous way is more procedural
    • kuni katsuya
      kuni katsuya on 12 Dec 12
       
      ie. ProductService.ship(Product,Customer)
  • ...12 more annotations...
  • service/manager is a set of procedures you can run, where the execution takes a product and a customer as arguments
  • better
  • OO approach
  • not saying that achieving the above is not possible with a DI framework
  • only that DI
  • encourages the ProductService approach
    • kuni katsuya
      kuni katsuya on 12 Dec 12
       
      well, dependency injection, but moreover, the soa approach to service design tends to force otherwise intelligent software engineers into doing procedural design the services just end up being bags of method calls that implement any type of behavior, with the domain objects or entity beans being reduced to mere data structures with little responsibility or behavior beyond persistence. (which, in this anti-pattern, is typically mostly provided by the repository or dao class! ie. domain object crud)
  • it’s just easier
    • kuni katsuya
      kuni katsuya on 12 Dec 12
       
      ... if you just blindly follow the anti-pattern, of course  ;)
  • many benefits
    • kuni katsuya
      kuni katsuya on 12 Dec 12
       
      with the procedural approach, you also cannot implement polymorphic behavior, for instance
  • builder
  • fluent interface
  • it’s not for small projects
    • kuni katsuya
      kuni katsuya on 12 Dec 12
       
      fuckwhat? small or big matters not. if di is applied poorly, regardless of project size, it's an anti-pattern! disregard these comments!
  • problems with DI frameworks:
    • kuni katsuya
      kuni katsuya on 12 Dec 12
       
      not sure i agree with these points, but will refuse in a later sticky note
54More

Architecture | Apache Shiro - 0 views

shiro.apache.org/architecture.html apache shiro architecture
shared by kuni katsuya on 15 Aug 12 - No Cached
  • Realm is essentially a security-specific DAO
  • 3 primary concepts:
  • Subject
  • ...51 more annotations...
  • SecurityManager
  • Realms
  • High-Level Overview
  • Subject
  • essentially a security specific 'view' of the the currently executing user
  • Subject
  • instances are all bound to (and require) a
  • SecurityManager
  • When you interact with a Subject, those interactions translate to subject-specific interactions with the SecurityManager
  • SecurityManager
  • 'umbrella’ object that coordinates its internal security components that together form an object graph
  • Realms
  • ‘connector’ between Shiro and your
  • application’s security data
  • Shiro looks up many of these things from one or more Realms configured for an application
  • Subject
  • SecurityManager
  • Authenticator
  • Authorizer
  • component responsible determining users' access control in the application
  • if a user is allowed to do something or not
  • SessionManager
  • knows how to create and manage user
  • Session
  • lifecycles
  • Shiro has the ability to natively manage user Sessions in any environment, even if there is no Web/Servlet or EJB container available
  • Shiro will use
  • an existing session mechanism
  • if available, (e.g. Servlet Container)
  • if there isn't one, such as in a standalone application or non-web environment, it will use its
  • built-in enterprise session management
  • SessionDAO
  • exists to allow any datasource to be used to
  • persist sessions
  • SessionDAO
  • performs Session persistence (CRUD) operations on behalf of the SessionManager
  • allows any data store to be plugged in to the Session Management infrastructure
  • CacheManager
  • creates and manages Cache instance lifecycles used by other Shiro components
  • improve performance while using these data source
  • Cryptography
  • Realms
  • ‘connector’ between Shiro and your application’s security data
  • Realms
  • Realms
  • Realms
  • ‘connector’ between Shiro and your application’s security data
  • ‘connector’ between Shiro and your application’s security data
  • ‘connector’ between Shiro and your application’s security data
  • ‘connector’ between Shiro and your application’s security data
  • ‘connector’ between Shiro and your application’s security data
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