public Entity Read(string entityID, List<string> replicas)
{
Entity local = ServerManager.Instance.ServerInstance.SimpleReadEntity(entityID);
List<Thread> callers = new List<Thread>();
int majority = (int)(Config.Instance.NumberOfReplicas / 2.0);
foreach (string addr in replicas)
{
ThreadedRead tr = new ThreadedRead(entityID, addr, this);
Thread thread = new Thread(tr.RemoteRead);
callers.Add(thread);
thread.Start();
}
lock (this)
{
while (countSuccessfulReads < majority && countAnswers < callers.Count)
Monitor.Wait(this);
}
foreach (Thread t in callers)
if (t.IsAlive)
t.Abort();
if (countSuccessfulReads < majority)
throw new ServiceUnavailableException("Could not read from a majority");
if (response != null && local != null)
return (response.Timestamp > local.Timestamp) ? response : local;
if (response == null)
return local;
return response;
}
public Entity Read(string entityID, List <string> replicas)
{
Entity local = ServerManager.Instance.ServerInstance.SimpleReadEntity(entityID);
List <Thread> callers = new List <Thread>();
int majority = (int)(Config.Instance.NumberOfReplicas / 2.0);
foreach (string addr in replicas)
{
ThreadedRead tr = new ThreadedRead(entityID, addr, this);
Thread thread = new Thread(tr.RemoteRead);
callers.Add(thread);
thread.Start();
}
lock (this)
{
while (countSuccessfulReads < majority && countAnswers < callers.Count)
{
Monitor.Wait(this);
}
}
foreach (Thread t in callers)
{
if (t.IsAlive)
{
t.Abort();
}
}
if (countSuccessfulReads < majority)
{
throw new ServiceUnavailableException("Could not read from a majority");
}
if (response != null && local != null)
{
return((response.Timestamp > local.Timestamp) ? response : local);
}
if (response == null)
{
return(local);
}
return(response);
}
