internal VirtualBucketsRingProvider(SiloAddress siloAddress, ILoggerFactory loggerFactory, int numVirtualBuckets)
{
numBucketsPerSilo = numVirtualBuckets;
if (numBucketsPerSilo <= 0)
{
throw new IndexOutOfRangeException("numBucketsPerSilo is out of the range. numBucketsPerSilo = " + numBucketsPerSilo);
}
logger = loggerFactory.CreateLogger <VirtualBucketsRingProvider>();
statusListeners = new List <IRingRangeListener>();
bucketsMap = new SortedDictionary <uint, SiloAddress>();
sortedBucketsList = new List <Tuple <uint, SiloAddress> >();
myAddress = siloAddress;
lockable = new object();
running = true;
myRange = RangeFactory.CreateFullRange();
logger.Info("Starting {0} on silo {1}.", typeof(VirtualBucketsRingProvider).Name, siloAddress.ToStringWithHashCode());
StringValueStatistic.FindOrCreate(StatisticNames.CONSISTENTRING_RING, ToString);
IntValueStatistic.FindOrCreate(StatisticNames.CONSISTENTRING_RINGSIZE, () => GetRingSize());
StringValueStatistic.FindOrCreate(StatisticNames.CONSISTENTRING_MYRANGE_RINGDISTANCE, () => String.Format("x{0,8:X8}", ((IRingRangeInternal)myRange).RangeSize()));
FloatValueStatistic.FindOrCreate(StatisticNames.CONSISTENTRING_MYRANGE_RINGPERCENTAGE, () => (float)((IRingRangeInternal)myRange).RangePercentage());
FloatValueStatistic.FindOrCreate(StatisticNames.CONSISTENTRING_AVERAGERINGPERCENTAGE, () =>
{
int size = GetRingSize();
return(size == 0 ? 0 : ((float)100.0 / (float)size));
});
// add myself to the list of members
AddServer(myAddress);
}
public ConsistentRingProvider(SiloAddress siloAddr)
{
log = TraceLogger.GetLogger(typeof(ConsistentRingProvider).Name);
membershipRingList = new List <SiloAddress>();
MyAddress = siloAddr;
myKey = MyAddress.GetConsistentHashCode();
// add myself to the list of members
AddServer(MyAddress);
MyRange = RangeFactory.CreateFullRange(); // i am responsible for the whole range
statusListeners = new List <IRingRangeListener>();
Start();
}
internal void RemoveServer(SiloAddress silo)
{
lock (membershipRingList)
{
int indexOfFailedSilo = membershipRingList.FindIndex(elem => elem.Equals(silo));
if (indexOfFailedSilo < 0)
{
return; // we have already removed this silo
}
membershipRingList.Remove(silo);
// related to triggering handler
int myNewIndex = membershipRingList.FindIndex(elem => elem.Equals(MyAddress));
if (myNewIndex == -1)
{
throw new OrleansException(string.Format("{0}: Couldn't find my position in the ring {1}.", MyAddress, this.ToString()));
}
bool wasMyPred = ((myNewIndex == indexOfFailedSilo) || (myNewIndex == 0 && indexOfFailedSilo == membershipRingList.Count)); // no need for '- 1'
if (wasMyPred) // failed node was our predecessor
{
if (log.IsVerbose)
{
log.Verbose("Failed server was my pred? {0}, updated view {1}", wasMyPred, this.ToString());
}
IRingRange oldRange = MyRange;
if (membershipRingList.Count == 1) // i'm the only one left
{
MyRange = RangeFactory.CreateFullRange();
NotifyLocalRangeSubscribers(oldRange, MyRange, true);
}
else
{
int myNewPredIndex = myNewIndex == 0 ? membershipRingList.Count - 1 : myNewIndex - 1;
int myPredecessorsHash = membershipRingList[myNewPredIndex].GetConsistentHashCode();
MyRange = RangeFactory.CreateRange(unchecked ((uint)myPredecessorsHash), unchecked ((uint)myKey));
NotifyLocalRangeSubscribers(oldRange, MyRange, true);
}
}
log.Info("Removed Server {0} hash {1}. Current view {2}", silo, silo.GetConsistentHashCode(), this.ToString());
}
}
public override string ToString()
{
lock (membershipRingList)
{
if (membershipRingList.Count == 1)
{
return(Utils.EnumerableToString(membershipRingList, silo => String.Format("{0} -> {1}", silo.ToStringWithHashCode(), RangeFactory.CreateFullRange())));
}
var sb = new StringBuilder("[");
for (int i = 0; i < membershipRingList.Count; i++)
{
SiloAddress curr = membershipRingList[i];
SiloAddress next = membershipRingList[(i + 1) % membershipRingList.Count];
IRingRange range = RangeFactory.CreateRange(unchecked ((uint)curr.GetConsistentHashCode()), unchecked ((uint)next.GetConsistentHashCode()));
sb.Append(String.Format("{0} -> {1}, ", curr.ToStringWithHashCode(), range));
}
sb.Append("]");
return(sb.ToString());
}
}
public RangeBreakable()
{
ranges = new List <SingleRange>(1);
ranges.Add(RangeFactory.CreateFullRange() as SingleRange);
}