Package com.unboundid.ldap.listener

Class RateLimiterRequestHandler

java.lang.Object

com.unboundid.ldap.listener.LDAPListenerRequestHandler

com.unboundid.ldap.listener.RateLimiterRequestHandler

@NotMutable
@ThreadSafety(level=COMPLETELY_THREADSAFE)
public final class RateLimiterRequestHandler
extends LDAPListenerRequestHandler

This class provides an implementation of an LDAP listener request handler that can be used to apply rate limiting to client requests. It uses one or more FixedRateBarrier instances to enforce the rate limiting, and provides the ability to control rate limiting on a per-operation-type basis.

Constructor Summary

Constructors

Constructor	Description
RateLimiterRequestHandler(LDAPListenerRequestHandler downstreamRequestHandler, int maxPerSecond)	Creates a new rate limiter request handler that will limit the rate of operations to the specified maximum number per second.
RateLimiterRequestHandler(LDAPListenerRequestHandler downstreamRequestHandler, FixedRateBarrier rateLimiter)	Creates a new rate limiter request handler that will use the provided FixedRateBarrier to perform rate limiting for all types of operations except abandon and unbind.
RateLimiterRequestHandler(LDAPListenerRequestHandler downstreamRequestHandler, FixedRateBarrier abandonRateLimiter, FixedRateBarrier addRateLimiter, FixedRateBarrier bindRateLimiter, FixedRateBarrier compareRateLimiter, FixedRateBarrier deleteRateLimiter, FixedRateBarrier extendedRateLimiter, FixedRateBarrier modifyRateLimiter, FixedRateBarrier modifyDNRateLimiter, FixedRateBarrier searchRateLimiter)	Creates a new rate limiter request handler that can use the provided FixedRateBarrier instances to perform rate limiting for different types of operations.

Method Summary

Modifier and Type	Method	Description
RateLimiterRequestHandler	newInstance(LDAPListenerClientConnection connection)	Creates a new instance of this request handler that will be used to process requests read by the provided connection.
void	processAbandonRequest(int messageID, AbandonRequestProtocolOp request, java.util.List<Control> controls)	Performs any processing necessary for the provided abandon request.
LDAPMessage	processAddRequest(int messageID, AddRequestProtocolOp request, java.util.List<Control> controls)	Performs any processing necessary for the provided add request.
LDAPMessage	processBindRequest(int messageID, BindRequestProtocolOp request, java.util.List<Control> controls)	Performs any processing necessary for the provided bind request.
LDAPMessage	processCompareRequest(int messageID, CompareRequestProtocolOp request, java.util.List<Control> controls)	Performs any processing necessary for the provided compare request.
LDAPMessage	processDeleteRequest(int messageID, DeleteRequestProtocolOp request, java.util.List<Control> controls)	Performs any processing necessary for the provided delete request.
LDAPMessage	processExtendedRequest(int messageID, ExtendedRequestProtocolOp request, java.util.List<Control> controls)	Performs any processing necessary for the provided extended request.
LDAPMessage	processModifyDNRequest(int messageID, ModifyDNRequestProtocolOp request, java.util.List<Control> controls)	Performs any processing necessary for the provided modify DN request.
LDAPMessage	processModifyRequest(int messageID, ModifyRequestProtocolOp request, java.util.List<Control> controls)	Performs any processing necessary for the provided modify request.
LDAPMessage	processSearchRequest(int messageID, SearchRequestProtocolOp request, java.util.List<Control> controls)	Performs any processing necessary for the provided search request.

Methods inherited from class com.unboundid.ldap.listener.LDAPListenerRequestHandler

closeInstance, processUnbindRequest

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RateLimiterRequestHandler

public RateLimiterRequestHandler(LDAPListenerRequestHandler downstreamRequestHandler,
                                 int maxPerSecond)

Creates a new rate limiter request handler that will limit the rate of operations to the specified maximum number per second. The rate limiting will be enforced for all types of operations except abandon and unbind. No rate limiting will be enforced for abandon or unbind operations.

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.

maxPerSecond - The maximum number of operations that will be allowed per second, across all types of operations except abandon and unbind. It must be greater than zero.

RateLimiterRequestHandler

public RateLimiterRequestHandler(LDAPListenerRequestHandler downstreamRequestHandler,
                                 FixedRateBarrier rateLimiter)

Creates a new rate limiter request handler that will use the provided FixedRateBarrier to perform rate limiting for all types of operations except abandon and unbind. No rate limiting will be enforced for abandon or unbind operations.

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.

rateLimiter - The fixed-rate barrier that will be used to achieve the rate limiting for all types of operations except abandon and unbind. It may be null if no rate limiting should be performed for any operation types.

RateLimiterRequestHandler

public RateLimiterRequestHandler(LDAPListenerRequestHandler downstreamRequestHandler,
                                 FixedRateBarrier abandonRateLimiter,
                                 FixedRateBarrier addRateLimiter,
                                 FixedRateBarrier bindRateLimiter,
                                 FixedRateBarrier compareRateLimiter,
                                 FixedRateBarrier deleteRateLimiter,
                                 FixedRateBarrier extendedRateLimiter,
                                 FixedRateBarrier modifyRateLimiter,
                                 FixedRateBarrier modifyDNRateLimiter,
                                 FixedRateBarrier searchRateLimiter)

Creates a new rate limiter request handler that can use the provided FixedRateBarrier instances to perform rate limiting for different types of operations. The same barrier 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 rate of search and modify operations to exceed a given threshold, then you could provide the same barrier instance for the modifyRateLimiter and searchRateLimiter 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.

abandonRateLimiter - The fixed-rate barrier to use when processing abandon operations. It may be null if no rate limiting should be enforced for abandon operations.

addRateLimiter - The fixed-rate barrier to use when processing add operations. It may be null if no rate limiting should be enforced for add operations.

bindRateLimiter - The fixed-rate barrier to use when processing bind operations. It may be null if no rate limiting should be enforced for bind operations.

compareRateLimiter - The fixed-rate barrier to use when processing compare operations. It may be null if no rate limiting should be enforced for compare operations.

deleteRateLimiter - The fixed-rate barrier to use when processing delete operations. It may be null if no rate limiting should be enforced for delete operations.

extendedRateLimiter - The fixed-rate barrier to use when processing extended operations. It may be null if no rate limiting should be enforced for extended operations.

modifyRateLimiter - The fixed-rate barrier to use when processing modify operations. It may be null if no rate limiting should be enforced for modify operations.

modifyDNRateLimiter - The fixed-rate barrier to use when processing modify DN operations. It may be null if no rate limiting should be enforced for modify DN operations.

searchRateLimiter - The fixed-rate barrier to use when processing search operations. It may be null if no rate limiting should be enforced for search operations.

Method Detail

newInstance

public RateLimiterRequestHandler newInstance(LDAPListenerClientConnection connection)
                                      throws LDAPException

Creates a new instance of this request handler that will be used to process requests read by the provided connection.

Specified by:

newInstance in class LDAPListenerRequestHandler

Parameters:

connection - The connection with which this request handler instance will be associated.

Returns:

The request handler instance that will be used for the provided connection.

Throws:

LDAPException - If the connection should not be accepted.

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.