com.sun.appserv.management.client.prefs
Interface LoginInfoStore

All Known Implementing Classes:

MemoryHashLoginInfoStore

public interface LoginInfoStore

An interface that represents the database of LoginInfo objects. Provides methods to access and mutate the store. The general contract of store update comprises of the following:

• The store can contain at the most one LoginInfo for a host and port combination
• There is no guarantee that concurrent modification of this store by two different programs will always be consistent.

Since:

Appserver 9.0

Method Summary

boolean	exists(String host, int port) Checks whether a LoginInfo for given host and port exists in this store.
String	getName() Returns the name of the store.
Collection<LoginInfo>	list() A convenience method that returns the Collection of LoginInfo instances stored in this store.
LoginInfo	read(String host, int port) Returns a LoginInfo corresponding to the given host and port, from this store.
void	remove(String host, int port) Removes the LoginInfo corresponding to the given host and port, from this store.
int	size() A convenience method that returns the number of LoginInfo instances stored in this store.
void	store(LoginInfo login) Stores the given LoginInfo in this store.
void	store(LoginInfo login, boolean overwrite) Stores the given LoginInfo in this store.

Method Detail

read

LoginInfo read(String host,
               int port)
               throws StoreException

Returns a LoginInfo corresponding to the given host and port, from this store. The host may not be null. For a given host and port, there can be at most one LoginInfo in this store.

Parameters:

host - a non null String representing host name

port - an integer specifying the port number

Returns:

the corresponding LoginInfo, null if there is none

Throws:

StoreException - if there is something wrong with reading the store

IllegalArgumentException - if the parameter host is null

remove

void remove(String host,
            int port)
            throws StoreException

Removes the LoginInfo corresponding to the given host and port, from this store. The host may not be null. If no such LoginInfo exists, StoreException results. The caller thus must ensure if such a LoginInfo exists before calling this method. Upon successful return, size of this store decreases by one.

Parameters:

host - a non null String representing host name

port - an integer specifying the port number

Throws:

StoreException - if there is something wrong with reading the store or if there is no such LoginInfo

IllegalArgumentException - if the parameter host is null

store

void store(LoginInfo login)
           throws StoreException

Stores the given LoginInfo in this store. Given LoginInfo may not be null. Upon successful return, the size of this store increases by one. An exception is thrown if there is already a LoginInfo with given host and port.

Parameters:

login - a LoginInfo that needs to be stored

Throws:

StoreException - if there's any problem or if there is already a LoginInfo with given host and port

IllegalArgumentException - if the given LoginInfo is null

store

void store(LoginInfo login,
           boolean overwrite)
           throws StoreException

Stores the given LoginInfo in this store. Given LoginInfo may not be null. Upon successful return, the size of this store increases by one. An exception is thrown if there is already a LoginInfo with given host and port and overwrite is false. If overwrite is true, the given LoginInfo is stored regardless of whether it already exists in this store. Depending upon the value of overwrite, the store is either unchanged or not.

Parameters:

login - a LoginInfo that needs to be stored

Throws:

StoreException - if there's any problem in storing or if overwrite is false and the LoginInfo with given host and port already exists

IllegalArgumentException - if the given LoginInfo is null

exists

boolean exists(String host,
               int port)
               throws StoreException

Checks whether a LoginInfo for given host and port exists in this store.

Parameters:

host - a non null String representing host name

port - an integer specifying the port number

Throws:

StoreException - if there's any problem reading the store

list

Collection<LoginInfo> list()
                           throws StoreException

A convenience method that returns the Collection of LoginInfo instances stored in this store. An empty Collection is returned when there are no LoginInfo items stored.

Returns:

the Collection of LoginInfo instances

Throws:

StoreException - if there's any problem reading the store

size

int size()
         throws StoreException

A convenience method that returns the number of LoginInfo instances stored in this store. Zero is returned when no login information is stored.

Returns:

an integer representing number of stored login information elements, 0 if none

Throws:

StoreException - if there's any problem reading the store

getName

String getName()

Returns the name of the store. This is any name that the store implementation wants to use for identification, for instance.