private async Task Run()
{
availableNodes = RangeServicesToDictionary(await etcdClient.GetRange("heartbeat"));
watcher = await etcdClient.WatchRange("heartbeat");
watcher.Subscribe(events =>
{
foreach (var e in events)
{
var service = DiscoverableService.CreateFromEtcdKey(e.Key);
switch (e.Type)
{
case EventType.Put:
IList <DiscoverableService> values;
if (availableNodes.TryGetValue(service.Type, out values))
{
values.Add(service);
}
else
{
availableNodes.Add(service.Type, new List <DiscoverableService> {
service
});
}
break;
case EventType.Delete:
var valuesForKey = availableNodes[service.Type];
var isDeleted = valuesForKey.Remove(service);
if (!isDeleted)
{
throw new Exception("This can not happen");
}
if (!valuesForKey.Any())
{
availableNodes.Remove(e.Key);
}
break;
}
}
Console.WriteLine($"Available nodes {availableNodes.Aggregate(string.Empty, (acc, item) => $"{item.Key} - {item.Value.Aggregate(string.Empty, (a, i) => $"{i.Address} {a}")} {acc}")}");
});
}
WatchValues(ConcurrentDictionary <string, List <string> > cd)
{
try
{
var dk = etcdClient.GetRange(conf).Result;
foreach (var item in dk)
{
cd.AddOrUpdate(item.Key.Replace(conf, ""), new List <string> {
item.Value
}, (key, value) =>
{
value[0] = item.Value;
return(value);
});
}
}
catch
{
foreach (var item in cd)
{
await etcdClient.Put(conf + item.Key, item.Value[0]);
}
}
watcher = etcdClient.WatchRange(conf).Result;
watcher.Subscribe(s =>
{
foreach (var item in s)
{
cd.AddOrUpdate(item.Key.Replace(conf, ""), new List <string> {
item.Value
}, (key, value) =>
{
value[0] = item.Value;
return(value);
});
}
});
}