public void Set(string key, DBValue value)
{
_data.AddOrUpdate(key, value, (currentKey, existingVal) =>
{
return(ChooseActualValue(value, existingVal));
});
}
public void Remove(string key, DBValue value)
{
// make sure deleted value is valid
value.IsDeleted = true;
value.Value = null;
Set(key, value);
}
private DBValue ChooseActualValue(DBValue val1, DBValue val2)
{
if (val1.Version > val2.Version)
{
return(val1);
}
else if (val1.Version == val2.Version && val1.ServerId < val2.ServerId)
{
return(val1);
}
else
{
return(val2);
}
}
private void ProceedWriteCommand(DBUpdateMessage message)
{
var dbValue = new DBValue
{
Value = message.Value,
Version = message.Version,
ServerId = message.ServerId
};
if (message.Command == "set")
{
_db.Set(message.Key, dbValue);
}
else if (message.Command == "remove")
{
_db.Remove(message.Key, dbValue);
}
else
{
Console.WriteLine("Unknown command");
}
}