public AddressModel GetAddress()
{
int totalWeight = 0;
long maxCurrent = long.MinValue;
var now = DateTimeConverter.DateTimeToUnixTimestamp(DateTime.Now);
AddressModel selectedAddr = null;
WeightedRoundRobin selectedWRR = null;
foreach (var address in _address)
{
var identifyString = address.ToString();
int weight = GetWeight(address);
var weightedRoundRobin = _concurrent.GetOrAdd(identifyString, k => new Lazy <WeightedRoundRobin>(() =>
{
WeightedRoundRobin wrr = new WeightedRoundRobin();
wrr.SetWeight(weight);
return(wrr);
})).Value;
if (weight != weightedRoundRobin.GetWeight())
{
//weight changed
weightedRoundRobin.SetWeight(weight);
}
long cur = weightedRoundRobin.IncreaseCurrent();
weightedRoundRobin.SetLastUpdate(now);
if (cur > maxCurrent)
{
maxCurrent = cur;
selectedAddr = address;
selectedWRR = weightedRoundRobin;
}
totalWeight += weight;
}
if (_address.Count() != _concurrent.Count())
{
var concurrentsToRemove = _concurrent.Where(p => (now - p.Value.Value.GetLastUpdate()) * 1000 > RECYCLE_PERIOD).ToList();
concurrentsToRemove.ForEach(concurrent => _concurrent.TryRemove(concurrent.Key, out Lazy <WeightedRoundRobin> obj));
}
if (selectedAddr != null)
{
selectedWRR.Sel(totalWeight);
return(selectedAddr);
}
return(_address[0]);
}
public DbCommandInterceptor(params string[] slaveConnectionString)
{
weightedRoundRobin = new WeightedRoundRobin(this.GetServerObject(slaveConnectionString));
}
