org.apache.catalina
Interface Store

All Known Implementing Classes:

FileStore, JDBCStore, 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

getInfo

java.lang.String getInfo()

Return descriptive information about this Store implementation and the corresponding version number, in the format <description>/<version>.

getManager

Manager getManager()

Return 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 java.io.IOException

Return the number of Sessions present in this Store.

Throws:

java.io.IOException - if an input/output error occurs

addPropertyChangeListener

void addPropertyChangeListener(java.beans.PropertyChangeListener listener)

Add a property change listener to this component.

Parameters:

listener - The listener to add

keys

java.lang.String[] keys()
                        throws java.io.IOException

Return 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:

java.io.IOException - if an input/output error occurred

load

Session load(java.lang.String id)
             throws java.lang.ClassNotFoundException,
                    java.io.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

Throws:

java.lang.ClassNotFoundException - if a deserialization error occurs

java.io.IOException - if an input/output error occurs

remove

void remove(java.lang.String id)
            throws java.io.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:

java.io.IOException - if an input/output error occurs

clear

void clear()
           throws java.io.IOException

Remove all Sessions from this Store.

Throws:

java.io.IOException

removePropertyChangeListener

void removePropertyChangeListener(java.beans.PropertyChangeListener listener)

Remove a property change listener from this component.

Parameters:

listener - The listener to remove

save

void save(Session session)
          throws java.io.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:

java.io.IOException - if an input/output error occurs