public MasterVote Uprising(MasterVote vote, bool force = false)
{
if (fail)
{
throw new ProcessFailedException(id);
}
Console.WriteLine("UPRISING");
MasterVote newMaster;
// if force writes the vote id as master
if (force)
{
master = vote.Id;
newMaster = vote;
}
else
{
MasterVote myVote = new MasterVote(id, clock);
newMaster = MasterVote.Choose(myVote, vote);
}
return(newMaster);
}
// Tries to elect himself as the new master sending a vote to
// each alive metadata with its id:clock
// Other metadatas compare the votes, the one with the highest clock / lowest id
// wins, and returns that vote
public string Master()
{
if (fail)
{
throw new ProcessFailedException(id);
}
Console.WriteLine("MASTER ELECTION");
// if I'm the master
if (ImMaster)
{
return(id);
}
// checks if the master I know is down
try
{
return(metadatas[master].Master());
}
catch (ProcessFailedException) { }
// previous master is down, starting Uprising
MasterVote masterVote = new MasterVote(id, clock);
foreach (var entry in metadatas)
{
IMetadataToMetadata metadata = entry.Value;
try
{
// chooses better vote between previous master and the one from the metadata
masterVote = MasterVote.Choose(metadata.Uprising(masterVote), masterVote);
}
catch (ProcessFailedException) { }
}
// second round to confirm votes
foreach (var entry in metadatas)
{
IMetadataToMetadata metadata = entry.Value;
try
{
// chooses better vote between previous master and the one from the metadata
metadata.Uprising(masterVote, true);
}
catch (ProcessFailedException) { }
}
master = masterVote.Id;
return(master);
}
