Package org.apache.catalina

Interface Store

All Known Implementing Classes:

DataSourceStore, FileStore, StoreBase

public interface Store

A Store is the abstraction of a Catalina component that provides persistent storage and loading of Sessions and their associated user data. Implementations are free to save and load the Sessions to any media they wish, but it is assumed that saved Sessions are persistent across server or context restarts.

Author:

Craig R. McClanahan

Method Summary

Modifier and Type	Method	Description
void	addPropertyChangeListener(PropertyChangeListener listener)	Add a property change listener to this component.
void	clear()	Remove all Sessions from this Store.
Manager	getManager()
int	getSize()
String[]	keys()
Session	load(String id)	Load and return the Session associated with the specified session identifier from this Store, without removing it.
void	remove(String id)	Remove the Session with the specified session identifier from this Store, if present.
void	removePropertyChangeListener(PropertyChangeListener listener)	Remove a property change listener from this component.
void	save(Session session)	Save the specified Session into this Store.
void	setManager(Manager manager)	Set the Manager associated with this Store.

Method Details

getManager

Manager getManager()

Returns:

the Manager instance associated with this Store.

setManager

void setManager(Manager manager)

Set the Manager associated with this Store.

Parameters:

manager - The Manager which will use this Store.

getSize

int getSize()
     throws IOException

Returns:

the number of Sessions present in this Store.

Throws:

IOException - if an input/output error occurs

addPropertyChangeListener

void addPropertyChangeListener(PropertyChangeListener listener)

Add a property change listener to this component.

Parameters:

listener - The listener to add

keys

String[] keys()
       throws IOException

Returns:

an array containing the session identifiers of all Sessions currently saved in this Store. If there are no such Sessions, a zero-length array is returned.

Throws:

IOException - if an input/output error occurred

load

Session load(String id)
      throws ClassNotFoundException,
IOException

Load and return the Session associated with the specified session identifier from this Store, without removing it. If there is no such stored Session, return null.

Parameters:

id - Session identifier of the session to load

Returns:

the loaded Session instance

Throws:

ClassNotFoundException - if a deserialization error occurs

IOException - if an input/output error occurs

remove

void remove(String id)
     throws IOException

Remove the Session with the specified session identifier from this Store, if present. If no such Session is present, this method takes no action.

Parameters:

id - Session identifier of the Session to be removed

Throws:

IOException - if an input/output error occurs

clear

void clear()
    throws IOException

Remove all Sessions from this Store.

Throws:

IOException - if an input/output error occurs

removePropertyChangeListener

void removePropertyChangeListener(PropertyChangeListener listener)

Remove a property change listener from this component.

Parameters:

listener - The listener to remove

save

void save(Session session)
   throws IOException

Save the specified Session into this Store. Any previously saved information for the associated session identifier is replaced.

Parameters:

session - Session to be saved

Throws:

IOException - if an input/output error occurs