public IResponse VisitGetAndLock(GetAndLockRequest getAndLockRequest)
{
return(ExecuteRequest(getAndLockRequest, new GetAndLockExecutor(getAndLockRequest)));
}
public IResponse VisitGetAndLock(GetAndLockRequest getAndLockRequest)
{
return(this.WaitNormalState(getAndLockRequest));
}
private IResponse[] GetAndLock(Take take)
{
while (true)
{
int getAndLockRequestNumber = this.client.GetRequestNumber();
int unlockRequestNumber = 0;
GetAndLockRequest getAndLockRequest = new GetAndLockRequest(
this.client.ViewNumber,
this.client.Id,
getAndLockRequestNumber,
take.Tuple);
IResponse[] responses = { };
while (this.client.ViewServers.Length != responses.Length)
{
int numberOfLockedRequests = this.client.ViewServers.Length;
Uri[] servers = this.client.ViewServers;
responses = this.messageServiceClient.RequestMulticast(
getAndLockRequest,
servers,
numberOfLockedRequests,
Timeout.TIMEOUT_XL_CLIENT,
true).ToArray();
if (responses.Length != this.client.ViewServers.Length)
{
this.client.DoHandShake();
getAndLockRequest.ViewNumber = this.client.ViewNumber;
}
if (responses.Length == 0)
{
continue;
}
// Check if refused
// No-one refused
if (responses.Length == numberOfLockedRequests)
{
return(responses);
}
// Some refused but the majority locked
if (responses.Length >= (numberOfLockedRequests / 2) + 1)
{
continue;
}
if (this.client.RequestNumber == getAndLockRequestNumber)
{
unlockRequestNumber = this.client.GetRequestNumber();
}
// The majority didn't lock so it's needed to unlock
UnlockRequest unlockRequest = new UnlockRequest(
this.client.ViewNumber,
this.client.Id,
unlockRequestNumber);
// Unlock
this.messageServiceClient.RequestMulticast(
unlockRequest,
servers,
numberOfLockedRequests,
-1,
false);
break;
}
return(responses);
}
}
