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Java Source Code / Java Documentation » Web Framework » struts 1.3.8 » org.apache.struts.webapp.example

Source Cross Reference Class Diagram Java Document (Java Doc)

org.apache.struts.webapp.example .UserDatabase

All known Subclasses:   org.apache.struts.webapp.example.memory .MemoryUserDatabase,
UserDatabase
public interface UserDatabase (Code)

A Data Access Object (DAO) interface describing the available operations for retrieving and storing User s (and their associated Subscription s) in some persistence layer whose characteristics are not specified here. One or more implementations will be created to perform the actual I/O that is required.

author:
   Craig R. McClanahan
version:
   $Rev: 471754 $ $Date: 2006-11-06 08:55:09 -0600 (Mon, 06 Nov 2006) $
since:
   Struts 1.1

Method Summary
public void close()

public User createUser(String username)

Create and return a new User defined in this user database.
public User findUser(String username)

public User[] findUsers()

public void open()

public void removeUser(User user)
     Remove the specified User from this database.
public void save()


Method Detail
close
public void close() throws Exception(Code)

Finalize access to the underlying persistence layer.

exception:
  Exception - if a database access error occurs

createUser
public User createUser(String username)(Code)

Create and return a new User defined in this user database.

Parameters:
  username - Username of the new user
exception:
  IllegalArgumentExceptionif - the specified usernameis not unique

findUser
public User findUser(String username)(Code)

Return the existing User with the specified username, if any; otherwise return null.

Parameters:
  username - Username of the user to retrieve

findUsers
public User[] findUsers()(Code)

Return the set of User s defined in this user database.

open
public void open() throws Exception(Code)

Initiate access to the underlying persistence layer.

exception:
  Exception - if a database access error occurs

removeUser
public void removeUser(User user)(Code)
Remove the specified User from this database.
Parameters:
  user - User to be removed
exception:
  IllegalArgumentException - if the specified user is notassociated with this database

save
public void save() throws Exception(Code)

Save any pending changes to the underlying persistence layer.

exception:
  Exception - if a database access error occurs

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