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package javax.net.ssl;

import java.util.Enumeration;



A SSLSessionContext represents a set of
SSLSessions associated with a single entity. For example,
it could be associated with a server or client who participates in many
sessions concurrently.


Not all environments will contain session contexts.


There are SSLSessionContext parameters that affect how
sessions are stored:

    
     
  • Sessions can be set to expire after a specified
     time limit.
     
  • The number of sessions that can be stored in context
     can be limited.


A session can be retrieved based on its session id, and all session id's
in a SSLSessionContext can be listed.

Author:Nathan Abramson, David Brownell
See Also:
  • SSLSession
Since:1.4
/**
 * A <code>SSLSessionContext</code> represents a set of
 * <code>SSLSession</code>s associated with a single entity. For example,
 * it could be associated with a server or client who participates in many
 * sessions concurrently.
 * <p>
 * Not all environments will contain session contexts.
 * <p>
 * There are <code>SSLSessionContext</code> parameters that affect how
 * sessions are stored:
 * <UL>
 *      <LI>Sessions can be set to expire after a specified
 *      time limit.
 *      <LI>The number of sessions that can be stored in context
 *      can be limited.
 * </UL>
 * A session can be retrieved based on its session id, and all session id's
 * in a <code>SSLSessionContext</code> can be listed.
 *
 * @see SSLSession
 *
 * @since 1.4
 * @author Nathan Abramson
 * @author David Brownell
 */
public interface SSLSessionContext {

    
Returns the SSLSession bound to the specified session id.

Params:
  • sessionId – the Session identifier
Throws:
Returns:the SSLSession or null if
the specified session id does not refer to a valid SSLSession.
/**
     * Returns the <code>SSLSession</code> bound to the specified session id.
     *
     * @param sessionId the Session identifier
     * @return the <code>SSLSession</code> or null if
     * the specified session id does not refer to a valid SSLSession.
     *
     * @throws NullPointerException if <code>sessionId</code> is null.
     */
    public SSLSession getSession(byte[] sessionId);

    
Returns an Enumeration of all session id's grouped under this
SSLSessionContext.

Returns:an enumeration of all the Session id's
/**
     * Returns an Enumeration of all session id's grouped under this
     * <code>SSLSessionContext</code>.
     *
     * @return an enumeration of all the Session id's
     */
    public Enumeration<byte[]> getIds();

    
Sets the timeout limit for SSLSession objects grouped
under this SSLSessionContext.


If the timeout limit is set to 't' seconds, a session exceeds the
timeout limit 't' seconds after its creation time.
When the timeout limit is exceeded for a session, the
SSLSession object is invalidated and future connections
cannot resume or rejoin the session.
A check for sessions exceeding the timeout is made immediately whenever
the timeout limit is changed for this SSLSessionContext.

Params:
  • seconds – the new session timeout limit in seconds; zero means
         there is no limit.
Throws:
See Also:
/**
     * Sets the timeout limit for <code>SSLSession</code> objects grouped
     * under this <code>SSLSessionContext</code>.
     * <p>
     * If the timeout limit is set to 't' seconds, a session exceeds the
     * timeout limit 't' seconds after its creation time.
     * When the timeout limit is exceeded for a session, the
     * <code>SSLSession</code> object is invalidated and future connections
     * cannot resume or rejoin the session.
     * A check for sessions exceeding the timeout is made immediately whenever
     * the timeout limit is changed for this <code>SSLSessionContext</code>.
     *
     * @param seconds the new session timeout limit in seconds; zero means
     *          there is no limit.
     *
     * @exception IllegalArgumentException if the timeout specified is < 0.
     * @see #getSessionTimeout
     */
    public void setSessionTimeout(int seconds)
                 throws IllegalArgumentException;

    
Returns the timeout limit of SSLSession objects grouped
under this SSLSessionContext.


If the timeout limit is set to 't' seconds, a session exceeds the
timeout limit 't' seconds after its creation time.
When the timeout limit is exceeded for a session, the
SSLSession object is invalidated and future connections
cannot resume or rejoin the session.
A check for sessions exceeding the timeout limit is made immediately
whenever the timeout limit is changed for this
SSLSessionContext.

See Also:
Returns:the session timeout limit in seconds; zero means there is no
limit.
/**
     * Returns the timeout limit of <code>SSLSession</code> objects grouped
     * under this <code>SSLSessionContext</code>.
     * <p>
     * If the timeout limit is set to 't' seconds, a session exceeds the
     * timeout limit 't' seconds after its creation time.
     * When the timeout limit is exceeded for a session, the
     * <code>SSLSession</code> object is invalidated and future connections
     * cannot resume or rejoin the session.
     * A check for sessions exceeding the timeout limit is made immediately
     * whenever the timeout limit is changed for this
     * <code>SSLSessionContext</code>.
     *
     * @return the session timeout limit in seconds; zero means there is no
     * limit.
     * @see #setSessionTimeout
     */
    public int getSessionTimeout();

    
Sets the size of the cache used for storing
SSLSession objects grouped under this
SSLSessionContext.

Params:
  • size – the new session cache size limit; zero means there is no
limit.
Throws:
See Also:
/**
     * Sets the size of the cache used for storing
     * <code>SSLSession</code> objects grouped under this
     * <code>SSLSessionContext</code>.
     *
     * @param size the new session cache size limit; zero means there is no
     * limit.
     * @exception IllegalArgumentException if the specified size is < 0.
     * @see #getSessionCacheSize
     */
    public void setSessionCacheSize(int size)
                 throws IllegalArgumentException;

    
Returns the size of the cache used for storing
SSLSession objects grouped under this
SSLSessionContext.

See Also:
Returns:size of the session cache; zero means there is no size limit.
/**
     * Returns the size of the cache used for storing
     * <code>SSLSession</code> objects grouped under this
     * <code>SSLSessionContext</code>.
     *
     * @return size of the session cache; zero means there is no size limit.
     * @see #setSessionCacheSize
     */
    public int getSessionCacheSize();

}