org.apache.struts.examples.mailreader.memory
Class MemoryUserDatabase

java.lang.Object
  org.apache.struts.examples.mailreader.memory.MemoryUserDatabase

All Implemented Interfaces:

UserDatabase

public class MemoryUserDatabase

extends java.lang.Object

implements UserDatabase

Concrete implementation of UserDatabase for an in-memory database backed by an XML data file.

Since:

Struts 1.1

Version:

$Rev: 54929 $ $Date: 2004-10-16 09:38:42 -0700 (Sat, 16 Oct 2004) $

Field Summary

private org.apache.commons.logging.Log	log Logging output for this user database instance.
private java.lang.String	pathname Absolute pathname to the persistent file we use for loading and storing persistent data.
private java.lang.String	pathnameNew
private java.lang.String	pathnameOld
private java.util.HashMap	users The Users associated with this UserDatabase, keyed by username.

Constructor Summary

MemoryUserDatabase()

Method Summary

void	close() Finalize access to the underlying persistence layer.
User	createUser(java.lang.String username) Create and return a new User defined in this user database.
User	findUser(java.lang.String username) Return the existing User with the specified username, if any; otherwise return null.
User[]	findUsers() Return the set of Users defined in this user database.
java.lang.String	getPathname()
void	open() Initiate access to the underlying persistence layer.
void	removeUser(User user) Remove the specified User from this database.
void	save() Save any pending changes to the underlying persistence layer.
void	setPathname(java.lang.String pathname)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

log

private org.apache.commons.logging.Log log

Logging output for this user database instance.

users

private java.util.HashMap users

The Users associated with this UserDatabase, keyed by username.

pathname

private java.lang.String pathname

Absolute pathname to the persistent file we use for loading and storing persistent data.

pathnameOld

private java.lang.String pathnameOld

pathnameNew

private java.lang.String pathnameNew

Constructor Detail

MemoryUserDatabase

public MemoryUserDatabase()

Method Detail

getPathname

public java.lang.String getPathname()

setPathname

public void setPathname(java.lang.String pathname)

close

public void close()
           throws java.lang.Exception

Description copied from interface: UserDatabase

Finalize access to the underlying persistence layer.

Specified by:

close in interface UserDatabase

Throws:

java.lang.Exception - if a database access error occurs

createUser

public User createUser(java.lang.String username)

Description copied from interface: UserDatabase

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

Specified by:

createUser in interface UserDatabase

Parameters:

username - Username of the new user

findUser

public User findUser(java.lang.String username)
              throws ExpiredPasswordException

Description copied from interface: UserDatabase

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

Specified by:

findUser in interface UserDatabase

Parameters:

username - Username of the user to retrieve

Throws:

ExpiredPasswordException - if user password has expired and must be changed

findUsers

public User[] findUsers()

Description copied from interface: UserDatabase

Return the set of Users defined in this user database.

Specified by:

findUsers in interface UserDatabase

open

public void open()
          throws java.lang.Exception

Description copied from interface: UserDatabase

Initiate access to the underlying persistence layer.

Specified by:

open in interface UserDatabase

Throws:

java.lang.Exception - if a database access error occurs

removeUser

public void removeUser(User user)

Description copied from interface: UserDatabase

Remove the specified User from this database.

Specified by:

removeUser in interface UserDatabase

Parameters:

user - User to be removed

save

public void save()
          throws java.lang.Exception

Description copied from interface: UserDatabase

Save any pending changes to the underlying persistence layer.

Specified by:

save in interface UserDatabase

Throws:

java.lang.Exception - if a database access error occurs