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package JACE.netsvcs.Token;
/**
* Defines a handler for a certain type of lock. This allows new types
* of synchronization mechanisms to be added to the Token service without
* any modification of existing code. Implementing class instances that
* are registered (via the command line or another way)
* with the token service can be created as requests for that type of
* lock come into the service.
*
*@see LockHandlerAdapter
*@see MutexHandler
*@author Everett Anderson
*/
public interface LockHandler
{
/**
* Process a given TokenRequest and construct the appropriate
* reply. The request has already been read from the connection,
* and the reply will be sent without the LockHandler having to
* worry about the details.
*
*@param caller TokenRequestHandler which is accessing this LockHandler
*@param request request read from the connection
*@return appropriate TokenReply (success, failure, etc)
*/
TokenReply handleRequest(TokenRequestHandler caller,
TokenRequest request);
/**
* Release any claim the client represented with the given ID
* has on this handler's lock. This is used when a client
* disconnects.
*
*@param clientID ID of the client whose claims to abandon
*/
void abandonLock (String clientID);
}
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