internal ReplyData Take(RequestData requestData)
{
foreach (var entry in tupleSpace)
{
DIDATuple tuple = (DIDATuple)((List <object>)entry)[0];
string workerLock = (string)((List <object>)entry)[1];
if (workerLock == null)
{
continue;
}
// If locked by client
if (workerLock.Equals(requestData.ClientId))
{
// If it is the tuple to remove, removes it from the tupleSpace, else removes the lock
if (tuple.Matches(requestData.TupleData))
{
object toRemove = entry;
tupleSpace.TryTake(out toRemove);
return(new AckReply(requestData.RequestId));
}
else
{
object toRemoveLock = entry;
if (tupleSpace.TryPeek(out toRemoveLock))
{
((List <object>)toRemoveLock)[1] = null;
}
}
}
}
return(new AckReply(requestData.RequestId));
}
internal ReplyData Lock(RequestData requestData)
{
List <DIDATuple> tupleSetToSend = new List <DIDATuple>();
bool refused = false;
foreach (var entry in tupleSpace)
{
DIDATuple tuple = (DIDATuple)((List <object>)entry)[0];
string workerLock = (string)((List <object>)entry)[1];
// If unlocked and it matches the template it locks the tuple
if (tuple.Matches(requestData.TupleData))
{
if (workerLock != null)
{
refused = true;
continue;
}
object toLock = entry;
if (tupleSpace.TryPeek(out toLock))
{
((List <object>)toLock)[1] = requestData.ClientId;
tupleSetToSend.Add(tuple);
}
}
}
if (refused)
{
return(new LockRefusedReply(requestData.RequestId));
}
return(new TupleSetReply(requestData.RequestId, tupleSetToSend));
}
internal ReplyData Read(RequestData requestData)
{
foreach (var entry in tupleSpace)
{
DIDATuple tuple = (DIDATuple)((List <object>)entry)[0];
if (tuple.Matches(requestData.TupleData))
{
return(new TupleReply(requestData.RequestId, tuple));
}
}
return(new NoTupleFoundReply(requestData.RequestId));
}
private List <DIDATuple> GetMatchingTuples(DIDATuple didaTuple)
{
List <DIDATuple> matchingTuples = new List <DIDATuple>();
foreach (var entry in tupleSpace)
{
DIDATuple tuple = (DIDATuple)((List <object>)entry)[0];
if (tuple.Matches(didaTuple))
{
matchingTuples.Add(tuple);
}
}
return(matchingTuples);
}
internal ReplyData Unlock(RequestData requestData)
{
foreach (var entry in tupleSpace)
{
DIDATuple tuple = (DIDATuple)((List <object>)entry)[0];
string workerLock = (string)((List <object>)entry)[1];
// If locked by client and it is the tuple to unlock, removes the lock
if (workerLock.Equals(requestData.ClientId) && tuple.Matches(requestData.TupleData))
{
object toRemoveLock = entry;
if (tupleSpace.TryPeek(out toRemoveLock))
{
((List <object>)toRemoveLock)[1] = null;
}
}
}
return(new AckReply(requestData.RequestId));
}
