public void SendTransactionToSlaves(ClusterTransaction txn)
{
var msg = txn.AsMessage();
foreach (var slave in _slaves)
{
msg.WriteTo(slave.TcpClient.GetStream());
}
}
private void QueueTransaction(ClusterTransaction txn)
{
if (txn is ClusterUpdateTransaction)
{
var cut = txn as ClusterUpdateTransaction;
_storeInfo[txn.StoreId].Queue(txn.JobId);
_serverCore.QueueTransaction(txn.JobId, txn.StoreId,
cut.Preconditions, cut.Deletes,
cut.Inserts);
}
else if (txn is ClusterSparqlTransaction)
{
var sut = txn as ClusterSparqlTransaction;
_storeInfo[txn.StoreId].Queue(txn.JobId);
_serverCore.QueueUpdate(txn.JobId, txn.StoreId, sut.Expression);
}
}
public bool ProcessSyncTransaction(ClusterTransaction txn)
{
if (_state == CoreState.SyncToMaster)
{
if (HaveTransaction(txn))
{
// Already have a job with this GUID
return(true);
}
if (HavePrecedingTransaction(txn))
{
QueueTransaction(txn);
return(true);
}
}
return(false);
}
public bool ProcessSlaveTransaction(ClusterTransaction txn)
{
// check we have store info
if (!_storeInfo.ContainsKey(txn.StoreId))
{
// we need to create the store
CreateStore(txn.StoreId);
}
if (!HavePrecedingTransaction(txn))
{
if (_state == CoreState.SyncToMaster)
{
// TODO: buffer this transaction locally to replay when sync is finished
return(true);
}
// We must have missed at least one message. Resync to master
StartSyncToMaster();
return(false);
}
QueueTransaction(txn);
return(true);
}
public void SendTransactionToSlaves(ClusterTransaction txn)
{
var msg = txn.AsMessage();
foreach(var slave in _slaves)
{
msg.WriteTo(slave.TcpClient.GetStream());
}
}
private bool HavePrecedingTransaction(ClusterTransaction txn)
{
return(_storeInfo[txn.StoreId].Last.Equals(txn.PrevTxnId));
}
private bool HaveTransaction(ClusterTransaction txn)
{
// TODO: If not in cached transaction list, check back through txn log
return(_storeInfo[txn.StoreId].HaveTransaction(txn.JobId));
}
private bool HavePrecedingTransaction(ClusterTransaction txn)
{
return _storeInfo[txn.StoreId].Last.Equals(txn.PrevTxnId);
}
private void QueueTransaction(ClusterTransaction txn)
{
if (txn is ClusterUpdateTransaction)
{
var cut = txn as ClusterUpdateTransaction;
_storeInfo[txn.StoreId].Queue(txn.JobId);
_serverCore.QueueTransaction(txn.JobId, txn.StoreId,
cut.Preconditions, cut.Deletes,
cut.Inserts);
} else if (txn is ClusterSparqlTransaction)
{
var sut = txn as ClusterSparqlTransaction;
_storeInfo[txn.StoreId].Queue(txn.JobId);
_serverCore.QueueUpdate(txn.JobId, txn.StoreId, sut.Expression);
}
}
public bool ProcessSlaveTransaction(ClusterTransaction txn)
{
// check we have store info
if (!_storeInfo.ContainsKey(txn.StoreId))
{
// we need to create the store
CreateStore(txn.StoreId);
}
if (!HavePrecedingTransaction(txn))
{
if (_state == CoreState.SyncToMaster)
{
// TODO: buffer this transaction locally to replay when sync is finished
return true;
}
// We must have missed at least one message. Resync to master
StartSyncToMaster();
return false;
}
QueueTransaction(txn);
return true;
}
private bool HaveTransaction(ClusterTransaction txn)
{
// TODO: If not in cached transaction list, check back through txn log
return _storeInfo[txn.StoreId].HaveTransaction(txn.JobId);
}
public bool ProcessSyncTransaction(ClusterTransaction txn)
{
if(_state == CoreState.SyncToMaster)
{
if (HaveTransaction(txn))
{
// Already have a job with this GUID
return true;
}
if (HavePrecedingTransaction(txn))
{
QueueTransaction(txn);
return true;
}
}
return false;
}
