[筆記]oceejbd6隨手筆記-Chapter 3

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Client View of a Session Bean	A client never directly accesses instances of the session bean's class. A client accesses a session object through the session bean's client view Independent of the implementation of the session bean and the container
The interface used by a remote client of a session bean	implemented by the container as a remote business interface location-independent
It's possible to provide more than one client view for a session bean	But typically only one will be provided.
Remote Clients	The arguments and results of the methods of the remote business interface are passed by value
Local Clients	May be another enterprise bean or a web component The arguments and results of the methods of the local business interface are passed by reference

筆記...中

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EJB的例外	可以分成兩群：Application Exception和System Exception。
Application Exception	是由Bean Provider所定義，用以報告商業邏輯有關的問題 是java.lang.Exception及其子類別 Unchecked Exception (java.lang.RuntimeException及其子類別)，並有@ApplicationException的annotation 類別javax.ejb.CreateException及其子類別 javax.ejb.RemoveException及其子類別 javax.ejb.FinderException及其子類別
@ApplicationException	是用來標示一個例外 (Exception) 為一個Application Exception，並宣告它應該在發生時，能被客戶端攔截到。 它有下列幾項選擇性的元素： Element 敘述 inherited 指明子類別是否也應該做為Application Exception 預設：true rollback 指定在例外被丟出時，是否應該進行交易回滾 (transaction rollback) 預設：false

參考文件

1. http://www.slideshare.net/krizsan/ocp-jbcd-6-study-notes
2. JSR-000318 Enterprise JavaBeans 3.1 Final Release Specification for Evaluation 3.1 Eval