https://luminoussheep.net/mediawiki/index.php?action=history&feed=atom&title=EJB_2
EJB 2 - Revision history
2026-04-16T19:05:08Z
Revision history for this page on the wiki
MediaWiki 1.43.8
https://luminoussheep.net/mediawiki/index.php?title=EJB_2&diff=59&oldid=prev
Martin: Created page with "= EJB 2 persistence = == CMP == Application implements the storage, update and query code SQL Frees developer from details of model changes == BMP == Developer creates inser..."
2021-09-14T21:28:13Z
<p>Created page with "= EJB 2 persistence = == CMP == Application implements the storage, update and query code SQL Frees developer from details of model changes == BMP == Developer creates inser..."</p>
<p><b>New page</b></p><div>= EJB 2 persistence =<br />
<br />
== CMP ==<br />
Application implements the storage, update and query code SQL<br />
Frees developer from details of model changes<br />
<br />
== BMP ==<br />
Developer creates insert, read, update code.<br />
Recommendation was use BMP with DAO as tools mature<br />
If developer can tune SQL and produce more efficient code<br />
<br />
= EJB 2 Interfaces =<br />
Ref: http://java.sun.com/j2ee/sdk_1.3/techdocs/api/index.html<br />
<br />
== Entity Bean ==<br />
* FooBean extends javax.ejb.remote <br />
** implementation<br />
* FooBeanRemote extends javax.ejb.EJBObject <br />
** business methods - interface - remote component interface<br />
* FooBeanRemoteHome extends javax.ejb.EJBHome <br />
** get handle - remote home interface<br />
* FooBeanLocal extends javax.ejb.EJBLocalObject <br />
** business methods - interface - local component interface<br />
* FooBeanLocalHome extends javax.ejb.EJBLocalHome <br />
** get handle - local home interface<br />
<br />
== ''javax.ejb.''EJBHome ==<br />
*not for session beans<br />
** create(id) - CMP<br />
** remove() <br />
** findByPrimaryKey(id) - CMP<br />
<br />
== ''javax.ejb.''EJBObject ==<br />
* Remote interface<br />
* Business methods<br />
* Acts as a proxy<br />
<br />
= Bean =<br />
<br />
* Implementation details<br />
* one of Session or Entity<br />
<br />
== ''javax.ejb.''SessionBean ==<br />
* Stateful<br />
* Stateless<br />
* ejbActivate()<br />
* ejbPassivate()<br />
* ejbRemove()<br />
* setSessionContext(ctx)<br />
<br />
== ''javax.ejb.''EntityBean ==<br />
* CMP + BMP<br />
* ejbActivate()<br />
* ejbLoad()<br />
* ejbPassivate()<br />
* ejbRemove()<br />
* ejbStore()<br />
* setEntityContext(ctx)<br />
* unsetEntityContext()</div>
Martin