/** {@inheritDoc} */
@Override
public <R extends ExtendedResult> void handleExtendedRequest(
final Integer messageID,
final ExtendedRequest<R> request,
final IntermediateResponseHandler intermediateResponseHandler,
final LdapResultHandler<R> resultHandler) {
if (request.getOID().equals(CancelExtendedRequest.OID)) {
// Decode the request as a cancel request.
CancelExtendedRequest cancelRequest;
try {
cancelRequest =
CancelExtendedRequest.DECODER.decodeExtendedRequest(request, new DecodeOptions());
} catch (final DecodeException e) {
// Couldn't decode a cancel request.
resultHandler.handleException(
newLdapException(ResultCode.PROTOCOL_ERROR, e.getLocalizedMessage()));
return;
}
/*
* Register the request in the pending requests table. Even
* though this request cannot be cancelled, it is important to
* do this in order to monitor the number of pending operations.
*/
final RequestContextImpl<R, LdapResultHandler<R>> requestContext =
new RequestContextImpl<>(this, resultHandler, messageID, false);
if (addPendingRequest(requestContext)) {
// Find and cancel the request.
final RequestContextImpl<?, ?> cancelledRequest =
getPendingRequest(cancelRequest.getRequestID());
if (cancelledRequest != null) {
final LocalizableMessage cancelReason = INFO_CANCELED_BY_CANCEL_REQUEST.get(messageID);
cancelledRequest.cancel(cancelReason, request, requestContext, true);
} else {
/*
* Couldn't find the request. Invoke on context in order
* to remove pending request.
*/
requestContext.handleException(newLdapException(ResultCode.NO_SUCH_OPERATION));
}
}
} else {
// StartTLS requests cannot be cancelled.
boolean isCancelSupported = !request.getOID().equals(StartTLSExtendedRequest.OID);
final RequestContextImpl<R, LdapResultHandler<R>> requestContext =
new RequestContextImpl<>(this, resultHandler, messageID, isCancelSupported);
if (addPendingRequest(requestContext)) {
requestHandler.handleExtendedRequest(
requestContext, request, intermediateResponseHandler, requestContext);
}
}
}
private void handleTooLate() {
final R cancelResult =
request.getResultDecoder().newExtendedErrorResult(ResultCode.TOO_LATE, "", "");
resultHandler.handleException(newLdapException(cancelResult));
}
private void handleSuccess() {
final R cancelResult =
request.getResultDecoder().newExtendedErrorResult(ResultCode.SUCCESS, "", "");
resultHandler.handleResult(cancelResult);
}
private <R extends ExtendedResult> void cancel(
final LocalizableMessage reason,
final ExtendedRequest<R> cancelRequest,
final LdapResultHandler<R> cancelResultHandler,
final boolean sendResult) {
Reject.ifNull(reason);
if (!isCancelSupported) {
if (cancelResultHandler != null) {
final Result result = Responses.newGenericExtendedResult(ResultCode.CANNOT_CANCEL);
cancelResultHandler.handleException(newLdapException(result));
}
return;
}
List<CancelRequestListener> tmpListeners = null;
boolean invokeResultHandler = false;
boolean resultHandlerIsSuccess = false;
synchronized (stateLock) {
switch (state) {
case PENDING:
/* Switch to CANCEL_REQUESTED state. */
cancelRequestReason = reason;
if (cancelResultHandler != null) {
cancelResultHandlers = new LinkedList<>();
cancelResultHandlers.add(
new ExtendedResultHandlerHolder<R>(cancelRequest, cancelResultHandler));
}
tmpListeners = cancelRequestListeners;
cancelRequestListeners = null;
state = RequestState.CANCEL_REQUESTED;
this.sendResult &= sendResult;
break;
case CANCEL_REQUESTED:
/*
* Cancel already request so listeners already invoked.
*/
if (cancelResultHandler != null) {
if (cancelResultHandlers == null) {
cancelResultHandlers = new LinkedList<>();
}
cancelResultHandlers.add(
new ExtendedResultHandlerHolder<R>(cancelRequest, cancelResultHandler));
}
break;
case TOO_LATE:
case RESULT_SENT:
/*
* Cannot cancel, so invoke result handler immediately
* outside of lock.
*/
if (cancelResultHandler != null) {
invokeResultHandler = true;
resultHandlerIsSuccess = false;
}
break;
case CANCELLED:
/*
* Multiple cancellation attempts. Clients should not do
* this, but the cancel will effectively succeed
* immediately, so invoke result handler immediately outside
* of lock.
*/
if (cancelResultHandler != null) {
invokeResultHandler = true;
resultHandlerIsSuccess = true;
}
break;
}
}
/* Invoke listeners outside of lock. */
if (tmpListeners != null) {
for (final CancelRequestListener listener : tmpListeners) {
listener.handleCancelRequest(reason);
}
}
if (invokeResultHandler) {
if (resultHandlerIsSuccess) {
final R result =
cancelRequest.getResultDecoder().newExtendedErrorResult(ResultCode.SUCCESS, "", "");
cancelResultHandler.handleResult(result);
} else {
final Result result = Responses.newGenericExtendedResult(ResultCode.TOO_LATE);
cancelResultHandler.handleException(newLdapException(result));
}
}
}
