EJB .

by Vinay Ayyagari, St.Johns PG College,Hyd . 06/05/09

Enterprise Java Beans ,[object Object],[object Object],[object Object],[object Object],[object Object],06/05/09

Introduction ,[object Object],[object Object],[object Object],[object Object],06/05/09

What is the Difference between Web server and Application Server ? ,[object Object],[object Object],06/05/09

What the EJB Do? ,[object Object],06/05/09

EJB Component can Access by ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],06/05/09

Elements of EJB Components ,[object Object],[object Object],[object Object],[object Object],06/05/09

What is Home Interface: ,[object Object],[object Object],[object Object],[object Object],[object Object],06/05/09

Remote Interface: ,[object Object],[object Object],[object Object],[object Object],[object Object],06/05/09

Bean Class: ,[object Object],[object Object],06/05/09

Step 1:The EJB Container stores Home Object into the Naming Service. ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object

Step 2.Client Communicates with Naming registry with JNDI lookup() operation . ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object

Step-3.Clients gets the Home Object reference back to the Client (h) ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object

Step-4.Clients calls Create method on Home Object reference (h),so that call will be received Home Object in the Container. ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object

Step-5.Home Object Creates a bean object according to necessity. ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object

Step-6.The Home Object either Creates or Locates EJB Object in the Container ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object

Step-7.Home Object returns a reference of EJB Object back to the Client (r) ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object

Step-8.Client calls a Business method on EJB Object reference, so that the Ejb Object running in the container will receive it. ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object

Step-9.The EJB Object transfers or delegates the Business method call to the Bean Object. ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object

Step-10.The Bean Object executes Business logic and returns result back to EJB Object. ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object

Step-11.Finally EJB Object returns the result back to the Client. ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object Result

EJB Architecture ,[object Object],[object Object],06/05/09 Client EJB Container Home Object Ejb Object Bean Object Result

EJB Architecture ,[object Object],06/05/09

Bibliography ,[object Object],[object Object],[object Object],[object Object],06/05/09

. ,[object Object],[object Object],06/05/09

EJB .

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