javax.net.ssl

## Interface SSLSessionContext

-     public interface SSLSessionContext

  A `SSLSessionContext` represents a set of `SSLSession`s 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.
  Since:
    1.4
  See Also:
    `SSLSession`

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `Enumeration<byte[]>` | `getIds()` Returns an Enumeration of all session id's grouped under this `SSLSessionContext`.
    `SSLSession` | `getSession(byte[] sessionId)` Returns the `SSLSession` bound to the specified session id.
    `int` | `getSessionCacheSize()` Returns the size of the cache used for storing `SSLSession` objects grouped under this `SSLSessionContext`.
    `int` | `getSessionTimeout()` Returns the timeout limit of `SSLSession` objects grouped under this `SSLSessionContext`.
    `void` | `setSessionCacheSize(int size)` Sets the size of the cache used for storing `SSLSession` objects grouped under this `SSLSessionContext`.
    `void` | `setSessionTimeout(int seconds)` Sets the timeout limit for `SSLSession` objects grouped under this `SSLSessionContext`.

- - ### Method Detail

    - #### getSession

          SSLSession getSession(byte[] sessionId)

      Returns the `SSLSession` bound to the specified session id.
      Parameters:
        `sessionId` - the Session identifier
      Returns:
        the `SSLSession` or null if the specified session id does not refer to a valid SSLSession.
      Throws:
        `NullPointerException` - if `sessionId` is null.

    - #### getIds

          Enumeration<byte[]> getIds()

      Returns an Enumeration of all session id's grouped under this `SSLSessionContext`.
      Returns:
        an enumeration of all the Session id's

    - #### setSessionTimeout

          void setSessionTimeout(int seconds)
                                 throws IllegalArgumentException

      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`.

      Parameters:
        `seconds` - the new session timeout limit in seconds; zero means there is no limit.
      Throws:
        `IllegalArgumentException` - if the timeout specified is < 0.
      See Also:
        `getSessionTimeout()`

    - #### getSessionTimeout

          int getSessionTimeout()

      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`.

      Returns:
        the session timeout limit in seconds; zero means there is no limit.
      See Also:
        `setSessionTimeout(int)`

    - #### setSessionCacheSize

          void setSessionCacheSize(int size)
                                   throws IllegalArgumentException

      Sets the size of the cache used for storing `SSLSession` objects grouped under this `SSLSessionContext`.
      Parameters:
        `size` - the new session cache size limit; zero means there is no limit.
      Throws:
        `IllegalArgumentException` - if the specified size is < 0.
      See Also:
        `getSessionCacheSize()`

    - #### getSessionCacheSize

          int getSessionCacheSize()

      Returns the size of the cache used for storing `SSLSession` objects grouped under this `SSLSessionContext`.
      Returns:
        size of the session cache; zero means there is no size limit.
      See Also:
        `setSessionCacheSize(int)`

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