/// <summary>
/// Gets the outcome for a full round of responses from all the clusters.
/// </summary>
/// <param name="responsePromises">Promises for the responses for a particular grain from all of the clusters in the multi-cluster network</param>
/// <param name="grainId">The ID of the grain that we want to know its owner status</param>
/// <param name="logger">The logger in case there is useful information to log.</param>
/// <returns>The outcome of aggregating all of the responses. The task will complete as soon as it has enough responses to make a determination, even if not all of the clusters responded yet.</returns>
public static Task <GlobalSingleInstanceResponseOutcome> GetOutcomeAsync(Task <RemoteClusterActivationResponse>[] responsePromises, GrainId grainId, ILogger logger)
{
if (responsePromises.Any(t => t == null))
{
throw new ArgumentException("All response promises should have been initiated", nameof(responsePromises));
}
var details = new GlobalSingleInstanceResponseTracker(responsePromises, grainId, logger);
return(details.Task);
}
public Task <GlobalSingleInstanceResponseOutcome> SendRequestRound(ActivationAddress address, List <string> remoteClusters)
{
// array that holds the responses
var responses = new Task <RemoteClusterActivationResponse> [remoteClusters.Count];
// send all requests
for (int i = 0; i < responses.Length; i++)
{
responses[i] = SendRequest(address.Grain, remoteClusters[i]);
}
// response processor
return(GlobalSingleInstanceResponseTracker.GetOutcomeAsync(responses, address.Grain, logger));
}
private async Task RunBatchedActivationRequests(List <string> remoteClusters, List <GrainId> grains)
{
var addresses = new List <ActivationAddress>();
foreach (var grain in grains)
{
// retrieve activation
ActivationAddress address;
int version;
var mcstate = router.DirectoryPartition.TryGetActivation(grain, out address, out version);
// work on the doubtful ones only
if (mcstate == GrainDirectoryEntryStatus.Doubtful)
{
// try to start retry by moving into requested_ownership state
if (router.DirectoryPartition.UpdateClusterRegistrationStatus(grain, address.Activation, GrainDirectoryEntryStatus.RequestedOwnership, GrainDirectoryEntryStatus.Doubtful))
{
addresses.Add(address);
}
}
}
if (addresses.Count == 0)
{
return;
}
var batchResponses = new List <RemoteClusterActivationResponse[]>();
var tasks = remoteClusters.Select(async remotecluster =>
{
// find gateway and send batched request
try
{
var clusterGatewayAddress = this.multiClusterOracle.GetRandomClusterGateway(remotecluster);
var clusterGrainDir = this.grainFactory.GetSystemTarget <IClusterGrainDirectory>(Constants.ClusterDirectoryServiceId, clusterGatewayAddress);
var r = await clusterGrainDir.ProcessActivationRequestBatch(addresses.Select(a => a.Grain).ToArray(), this.config.ClusterId);
batchResponses.Add(r);
}
catch (Exception e)
{
batchResponses.Add(
Enumerable.Repeat <RemoteClusterActivationResponse>(
new RemoteClusterActivationResponse(ActivationResponseStatus.Faulted)
{
ResponseException = e
}, addresses.Count).ToArray());
}
}).ToList();
// wait for all the responses to arrive or fail
await Task.WhenAll(tasks);
if (logger.IsVerbose)
{
foreach (var br in batchResponses)
{
var summary = br.Aggregate(new { Pass = 0, Failed = 0, FailedA = 0, FailedOwned = 0, Faulted = 0 }, (agg, r) =>
{
switch (r.ResponseStatus)
{
case ActivationResponseStatus.Pass:
return(new { Pass = agg.Pass + 1, agg.Failed, agg.FailedA, agg.FailedOwned, agg.Faulted });
case ActivationResponseStatus.Failed:
if (!r.Owned)
{
return(r.ExistingActivationAddress.Address == null
? new { agg.Pass, Failed = agg.Failed + 1, agg.FailedA, agg.FailedOwned, agg.Faulted }
: new { agg.Pass, agg.Failed, FailedA = agg.FailedA + 1, agg.FailedOwned, agg.Faulted });
}
else
{
return(new { agg.Pass, agg.Failed, agg.FailedA, FailedOwned = agg.FailedOwned + 1, agg.Faulted });
}
default:
return(new { agg.Pass, agg.Failed, agg.FailedA, agg.FailedOwned, Faulted = agg.Faulted + 1 });
}
});
logger.Verbose("GSIP:M batchresponse PASS:{0} FAILED:{1} FAILED(a){2}: FAILED(o){3}: FAULTED:{4}",
summary.Pass,
summary.Failed,
summary.FailedA,
summary.FailedOwned,
summary.Faulted);
}
}
// process each address
var loser_activations_per_silo = new Dictionary <SiloAddress, List <ActivationAddress> >();
for (int i = 0; i < addresses.Count; i++)
{
var address = addresses[i];
// array that holds the responses
var responses = new RemoteClusterActivationResponse[remoteClusters.Count];
for (int j = 0; j < batchResponses.Count; j++)
{
responses[j] = batchResponses[j][i];
}
// response processor
var outcomeDetails = GlobalSingleInstanceResponseTracker.GetOutcome(responses, address.Grain, logger);
var outcome = outcomeDetails.State;
if (logger.IsVerbose2)
{
logger.Verbose2("GSIP:M {0} Result={1}", address.Grain, outcomeDetails);
}
switch (outcome)
{
case OutcomeState.RemoteOwner:
case OutcomeState.RemoteOwnerLikely:
{
// record activations that lost and need to be deactivated
List <ActivationAddress> losers;
if (!loser_activations_per_silo.TryGetValue(address.Silo, out losers))
{
loser_activations_per_silo[address.Silo] = losers = new List <ActivationAddress>();
}
losers.Add(address);
router.DirectoryPartition.CacheOrUpdateRemoteClusterRegistration(address.Grain, address.Activation, outcomeDetails.RemoteOwnerAddress.Address);
continue;
}
case OutcomeState.Succeed:
{
var ok = (router.DirectoryPartition.UpdateClusterRegistrationStatus(address.Grain, address.Activation, GrainDirectoryEntryStatus.Owned, GrainDirectoryEntryStatus.RequestedOwnership));
if (ok)
{
continue;
}
else
{
break;
}
}
case OutcomeState.Inconclusive:
{
break;
}
}
// we were not successful, reread state to determine what is going on
int version;
var mcstatus = router.DirectoryPartition.TryGetActivation(address.Grain, out address, out version);
// in each case, go back to DOUBTFUL
if (mcstatus == GrainDirectoryEntryStatus.RequestedOwnership)
{
// we failed because of inconclusive answers
var success = router.DirectoryPartition.UpdateClusterRegistrationStatus(address.Grain, address.Activation, GrainDirectoryEntryStatus.Doubtful, GrainDirectoryEntryStatus.RequestedOwnership);
if (!success)
{
ProtocolError(address, "unable to transition from REQUESTED_OWNERSHIP to DOUBTFUL");
}
}
else if (mcstatus == GrainDirectoryEntryStatus.RaceLoser)
{
// we failed because an external request moved us to RACE_LOSER
var success = router.DirectoryPartition.UpdateClusterRegistrationStatus(address.Grain, address.Activation, GrainDirectoryEntryStatus.Doubtful, GrainDirectoryEntryStatus.RaceLoser);
if (!success)
{
ProtocolError(address, "unable to transition from RACE_LOSER to DOUBTFUL");
}
}
else
{
ProtocolError(address, "unhandled protocol state");
}
TrackDoubtfulGrain(address.Grain);
}
// remove loser activations
foreach (var kvp in loser_activations_per_silo)
{
var catalog = this.grainFactory.GetSystemTarget <ICatalog>(Constants.CatalogId, kvp.Key);
catalog.DeleteActivations(kvp.Value).Ignore();
}
}
/// <summary>
/// Gets the outcome for a full round of responses from all the clusters.
/// </summary>
/// <param name="responsePromises">Promises fot the responses for a particular grain from all of the clusters in the multi-cluster network</param>
/// <param name="grainId">The ID of the grain that we want to know its owner status</param>
/// <param name="logger">The logger in case there is useful information to log.</param>
/// <returns>The outcome of aggregating all of the responses. The task will complete as soon as it has enough responses to make a determination, even if not all of the clusters responded yet.</returns>
public static Task<GlobalSingleInstanceResponseOutcome> GetOutcomeAsync(Task<RemoteClusterActivationResponse>[] responsePromises, GrainId grainId, Logger logger)
{
if (responsePromises.Any(t => t == null)) throw new ArgumentException("All response promises should have been initiated", nameof(responsePromises));
var details = new GlobalSingleInstanceResponseTracker(responsePromises, grainId, logger);
return details.Task;
}
