public async Task <BecomeCoordinatorResult> BecomeCoordinatorAsync(int currentEpoch)
{
try
{
ignoreWatches = false;
await zooKeeperService.IncrementAndWatchEpochAsync(currentEpoch, this);
await zooKeeperService.WatchNodesAsync(this);
ResourcesZnode getResourcesRes = await zooKeeperService.GetResourcesAsync(this, null);
resourcesVersion = getResourcesRes.Version;
}
catch (ZkStaleVersionException e)
{
logger.Error(clientId, "Could not become coordinator as a stale version number was used", e);
return(BecomeCoordinatorResult.StaleEpoch);
}
catch (ZkInvalidOperationException e)
{
logger.Error(clientId, "Could not become coordinator as an invalid ZooKeeper operation occurred", e);
return(BecomeCoordinatorResult.Error);
}
events.Add(CoordinatorEvent.RebalancingTriggered);
return(BecomeCoordinatorResult.Ok);
}
private async Task CheckForRebalancingAsync()
{
ResourcesZnode resources = await zooKeeperService.GetResourcesAsync(null, null);
List <string> assignedResources = resources.ResourceAssignments.Assignments
.Where(x => x.ClientId.Equals(clientId))
.Select(x => x.Resource)
.ToList();
if (assignedResources.Any())
{
events.Add(FollowerEvent.RebalancingTriggered);
}
}