public async Task <EtcdWatcher> Watch(string key)
{
var watchRequest = new WatchRequest()
{
CreateRequest = new WatchCreateRequest()
{
Key = ByteString.CopyFromUtf8(key)
}
};
var watcher = watchClient.Watch();
await watcher.RequestStream.WriteAsync(watchRequest);
return(new EtcdWatcher(watcher));
}
public IWatcher Watch(ByteSequence key, WatchOption watchOption)
{
if (IsClosed())
{
throw new ClosedWatchClientException();
}
WatcherImpl watcher = new WatcherImpl(key, watchOption, this);
// this.pendingWatchers.Enqueue(watcher);
Etcdserverpb.WatchRequest request = new Etcdserverpb.WatchRequest();
Etcdserverpb.WatchCreateRequest createRequest = new Etcdserverpb.WatchCreateRequest();
createRequest.Key = key.GetByteString();
createRequest.PrevKv = watchOption.isPrevKV();
createRequest.ProgressNotify = watchOption.isProgressNotify();
createRequest.RangeEnd = watchOption.getEndKey().GetByteString();
createRequest.StartRevision = watchOption.getRevision();
request.CreateRequest = createRequest;
Grpc.Core.CallOptions callOptions = new Grpc.Core.CallOptions();
watchClient.Watch(callOptions);
// watchClient.Watch()
// watchClient.Watch()
// if (this.pendingWatchers.Count == 1) {
// head of the queue send watchCreate request.
// WatchRequest request = this.toWatchCreateRequest(watcher);
// this.getGrpcWatchStreamObserver().onNext(request);
// }
return(watcher);
}
public void Resume()
{
if (closed)
{
return;
}
if (stream == null)
{
// id is not really useful today but it may be in etcd 3.4
watchID = -1;
Etcdserverpb.WatchCreateRequest createRequest = new Etcdserverpb.WatchCreateRequest
{
Key = key.GetByteString(),
PrevKv = watchOption.IsPrevKV,
ProgressNotify = watchOption.IsProgressNotify,
RangeEnd = watchOption.EndKey.GetByteString(),
StartRevision = watchOption.Revision
};
if (watchOption.EndKey.IsPresent)
{
createRequest.RangeEnd = watchOption.EndKey.GetByteString();
}
if (watchOption.IsNoDelete)
{
createRequest.Filters.Add(Etcdserverpb.WatchCreateRequest.Types.FilterType.Nodelete);
}
if (watchOption.IsNoPut)
{
createRequest.Filters.Add(Etcdserverpb.WatchCreateRequest.Types.FilterType.Noput);
}
Grpc.Core.CallOptions callOptions = new Grpc.Core.CallOptions();
Etcdserverpb.WatchRequest request = new Etcdserverpb.WatchRequest
{
CreateRequest = createRequest
};
var rsp = watchClient.Watch(callOptions);
rsp.RequestStream.WriteAsync(request);
stream = rsp;
this.watchID = rsp.ResponseStream.Current.WatchId;
}
}
static void Main(string[] args)
{
Channel c = new Channel("localhost", 2379, ChannelCredentials.Insecure);
WatchClient cli = new WatchClient(c);
var x = cli.Watch();
Console.WriteLine("input key....");
var key = Console.ReadLine();
var watchAction = new Action(async() =>
{
await x.RequestStream.WriteAsync(new WatchRequest()
{
CreateRequest = new WatchCreateRequest()
{
ProgressNotify = false, Key = Google.Protobuf.ByteString.CopyFromUtf8(key), PrevKv = true
}
});
await x.RequestStream.CompleteAsync();
});
watchAction();
var eventOn = new Action(async() =>
{
while (await x.ResponseStream.MoveNext(new System.Threading.CancellationToken()))
{
Console.WriteLine(x.ResponseStream.Current.ToString());
foreach (var item in x.ResponseStream.Current.Events)
{
Console.WriteLine(item.Kv.ToString());
}
}
});
eventOn();
Console.WriteLine("...");
Console.ReadLine();
}