Class ConcurrentRequestLimiterRequestHandler

    • Constructor Detail

      • ConcurrentRequestLimiterRequestHandler

        public ConcurrentRequestLimiterRequestHandler​(LDAPListenerRequestHandler downstreamRequestHandler,
                                                      int maxConcurrentRequests,
                                                      long rejectTimeoutMillis)
        Creates a new concurrent request limiter request handler that will impose the specified limit on the number of operations that may be in progress at any time. The limit will be enforced for all types of operations except abandon and unbind operations, which will not be limited.
        Parameters:
        downstreamRequestHandler - The downstream request handler that will be used to actually process the requests after any appropriate limiting has been performed.
        maxConcurrentRequests - The maximum number of requests that may be processed at any given time. This limit will be enforced for all operation types except abandon and unbind, which will not be limited.
        rejectTimeoutMillis - A timeout value (expressed in milliseconds) that will cause a requested operation to be rejected rather than processed if the associate semaphore cannot be acquired in this length of time. A value of zero indicates that the operation should be rejected immediately if the maximum number of concurrent requests are already in progress. A value that is less than zero indicates that no timeout should be imposed and that requests should be forced to wait as long as necessary until they can be processed.
      • ConcurrentRequestLimiterRequestHandler

        public ConcurrentRequestLimiterRequestHandler​(LDAPListenerRequestHandler downstreamRequestHandler,
                                                      java.util.concurrent.Semaphore semaphore,
                                                      long rejectTimeoutMillis)
        Creates a new concurrent request limiter request handler that will use the provided semaphore to limit on the number of operations that may be in progress at any time. The limit will be enforced for all types of operations except abandon and unbind operations, which will not be limited.
        Parameters:
        downstreamRequestHandler - The downstream request handler that will be used to actually process the requests after any appropriate limiting has been performed.
        semaphore - The semaphore that will be used to limit the number of concurrent operations in progress, for all operation types except abandon and unbind.
        rejectTimeoutMillis - A timeout value (expressed in milliseconds) that will cause a requested operation to be rejected rather than processed if the associate semaphore cannot be acquired in this length of time. A value of zero indicates that the operation should be rejected immediately if the maximum number of concurrent requests are already in progress. A value that is less than zero indicates that no timeout should be imposed and that requests should be forced to wait as long as necessary until they can be processed.
      • ConcurrentRequestLimiterRequestHandler

        public ConcurrentRequestLimiterRequestHandler​(LDAPListenerRequestHandler downstreamRequestHandler,
                                                      java.util.concurrent.Semaphore abandonSemaphore,
                                                      java.util.concurrent.Semaphore addSemaphore,
                                                      java.util.concurrent.Semaphore bindSemaphore,
                                                      java.util.concurrent.Semaphore compareSemaphore,
                                                      java.util.concurrent.Semaphore deleteSemaphore,
                                                      java.util.concurrent.Semaphore extendedSemaphore,
                                                      java.util.concurrent.Semaphore modifySemaphore,
                                                      java.util.concurrent.Semaphore modifyDNSemaphore,
                                                      java.util.concurrent.Semaphore searchSemaphore,
                                                      long rejectTimeoutMillis)
        Creates a new concurrent request limiter request handler that can use the provided semaphore instances to limit the number of operations in progress concurrently for each type of operation. The same semaphore instance can be provided for multiple operation types if performance for those operations should be limited in aggregate rather than individually (e.g., if you don't want the total combined number of search and modify operations in progress at any time to exceed a given threshold, then you could provide the same semaphore instance for the modifySemaphore and searchSemaphore arguments).
        Parameters:
        downstreamRequestHandler - The downstream request handler that will be used to actually process the requests after any appropriate rate limiting has been performed. It must not be null.
        abandonSemaphore - The semaphore to use when processing abandon operations. It may be null if no concurrent request limiting should be performed for abandon operations.
        addSemaphore - The semaphore to use when processing add operations. It may be null if no concurrent request limiting should be performed for add operations.
        bindSemaphore - The semaphore to use when processing bind operations. It may be null if no concurrent request limiting should be performed for bind operations.
        compareSemaphore - The semaphore to use when processing compare operations. It may be null if no concurrent request limiting should be performed for compare operations.
        deleteSemaphore - The semaphore to use when processing delete operations. It may be null if no concurrent request limiting should be performed for delete operations.
        extendedSemaphore - The semaphore to use when processing extended operations. It may be null if no concurrent request limiting should be performed for extended operations.
        modifySemaphore - The semaphore to use when processing modify operations. It may be null if no concurrent request limiting should be performed for modify operations.
        modifyDNSemaphore - The semaphore to use when processing modify DN operations. It may be null if no concurrent request limiting should be performed for modify DN operations.
        searchSemaphore - The semaphore to use when processing search operations. It may be null if no concurrent request limiting should be performed for search operations.
        rejectTimeoutMillis - A timeout value (expressed in milliseconds) that will cause a requested operation to be rejected rather than processed if the associate semaphore cannot be acquired in this length of time. A value of zero indicates that the operation should be rejected immediately if the maximum number of concurrent requests are already in progress. A value that is less than zero indicates that no timeout should be imposed and that requests should be forced to wait as long as necessary until they can be processed.
    • Method Detail

      • processAbandonRequest

        public void processAbandonRequest​(int messageID,
                                          AbandonRequestProtocolOp request,
                                          java.util.List<Control> controls)
        Performs any processing necessary for the provided abandon request.
        Overrides:
        processAbandonRequest in class LDAPListenerRequestHandler
        Parameters:
        messageID - The message ID of the LDAP message containing the abandon request.
        request - The abandon request that was included in the LDAP message that was received.
        controls - The set of controls included in the LDAP message. It may be empty if there were no controls, but will not be null.
      • processAddRequest

        public LDAPMessage processAddRequest​(int messageID,
                                             AddRequestProtocolOp request,
                                             java.util.List<Control> controls)
        Performs any processing necessary for the provided add request.
        Specified by:
        processAddRequest in class LDAPListenerRequestHandler
        Parameters:
        messageID - The message ID of the LDAP message containing the add request.
        request - The add request that was included in the LDAP message that was received.
        controls - The set of controls included in the LDAP message. It may be empty if there were no controls, but will not be null.
        Returns:
        The LDAPMessage containing the response to send to the client. The protocol op in the LDAPMessage must be an AddResponseProtocolOp.
      • processBindRequest

        public LDAPMessage processBindRequest​(int messageID,
                                              BindRequestProtocolOp request,
                                              java.util.List<Control> controls)
        Performs any processing necessary for the provided bind request.
        Specified by:
        processBindRequest in class LDAPListenerRequestHandler
        Parameters:
        messageID - The message ID of the LDAP message containing the bind request.
        request - The bind request that was included in the LDAP message that was received.
        controls - The set of controls included in the LDAP message. It may be empty if there were no controls, but will not be null.
        Returns:
        The LDAPMessage containing the response to send to the client. The protocol op in the LDAPMessage must be a BindResponseProtocolOp.
      • processCompareRequest

        public LDAPMessage processCompareRequest​(int messageID,
                                                 CompareRequestProtocolOp request,
                                                 java.util.List<Control> controls)
        Performs any processing necessary for the provided compare request.
        Specified by:
        processCompareRequest in class LDAPListenerRequestHandler
        Parameters:
        messageID - The message ID of the LDAP message containing the compare request.
        request - The compare request that was included in the LDAP message that was received.
        controls - The set of controls included in the LDAP message. It may be empty if there were no controls, but will not be null.
        Returns:
        The LDAPMessage containing the response to send to the client. The protocol op in the LDAPMessage must be a CompareResponseProtocolOp.
      • processDeleteRequest

        public LDAPMessage processDeleteRequest​(int messageID,
                                                DeleteRequestProtocolOp request,
                                                java.util.List<Control> controls)
        Performs any processing necessary for the provided delete request.
        Specified by:
        processDeleteRequest in class LDAPListenerRequestHandler
        Parameters:
        messageID - The message ID of the LDAP message containing the delete request.
        request - The delete request that was included in the LDAP message that was received.
        controls - The set of controls included in the LDAP message. It may be empty if there were no controls, but will not be null.
        Returns:
        The LDAPMessage containing the response to send to the client. The protocol op in the LDAPMessage must be a DeleteResponseProtocolOp.
      • processExtendedRequest

        public LDAPMessage processExtendedRequest​(int messageID,
                                                  ExtendedRequestProtocolOp request,
                                                  java.util.List<Control> controls)
        Performs any processing necessary for the provided extended request.
        Specified by:
        processExtendedRequest in class LDAPListenerRequestHandler
        Parameters:
        messageID - The message ID of the LDAP message containing the extended request.
        request - The extended request that was included in the LDAP message that was received.
        controls - The set of controls included in the LDAP message. It may be empty if there were no controls, but will not be null.
        Returns:
        The LDAPMessage containing the response to send to the client. The protocol op in the LDAPMessage must be an ExtendedResponseProtocolOp.
      • processModifyRequest

        public LDAPMessage processModifyRequest​(int messageID,
                                                ModifyRequestProtocolOp request,
                                                java.util.List<Control> controls)
        Performs any processing necessary for the provided modify request.
        Specified by:
        processModifyRequest in class LDAPListenerRequestHandler
        Parameters:
        messageID - The message ID of the LDAP message containing the modify request.
        request - The modify request that was included in the LDAP message that was received.
        controls - The set of controls included in the LDAP message. It may be empty if there were no controls, but will not be null.
        Returns:
        The LDAPMessage containing the response to send to the client. The protocol op in the LDAPMessage must be an ModifyResponseProtocolOp.
      • processModifyDNRequest

        public LDAPMessage processModifyDNRequest​(int messageID,
                                                  ModifyDNRequestProtocolOp request,
                                                  java.util.List<Control> controls)
        Performs any processing necessary for the provided modify DN request.
        Specified by:
        processModifyDNRequest in class LDAPListenerRequestHandler
        Parameters:
        messageID - The message ID of the LDAP message containing the modify DN request.
        request - The modify DN request that was included in the LDAP message that was received.
        controls - The set of controls included in the LDAP message. It may be empty if there were no controls, but will not be null.
        Returns:
        The LDAPMessage containing the response to send to the client. The protocol op in the LDAPMessage must be an ModifyDNResponseProtocolOp.
      • processSearchRequest

        public LDAPMessage processSearchRequest​(int messageID,
                                                SearchRequestProtocolOp request,
                                                java.util.List<Control> controls)
        Performs any processing necessary for the provided search request.
        Specified by:
        processSearchRequest in class LDAPListenerRequestHandler
        Parameters:
        messageID - The message ID of the LDAP message containing the search request.
        request - The search request that was included in the LDAP message that was received.
        controls - The set of controls included in the LDAP message. It may be empty if there were no controls, but will not be null.
        Returns:
        The LDAPMessage containing the response to send to the client. The protocol op in the LDAPMessage must be an SearchResultDoneProtocolOp.