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Added .NET implementation to docs for streaming subscription support #4358

Merged
merged 7 commits into from
Nov 14, 2024
Original file line number Diff line number Diff line change
Expand Up @@ -203,7 +203,47 @@ As messages are sent to the given message handler code, there is no concept of r

The example below shows the different ways to stream subscribe to a topic.

{{< tabs Go>}}
{{< tabs ".NET" Go>}}

{{% codetab %}}

```csharp
using Dapr.Messaging.PublishSubscribe;

var clientBuilder = new DaprPublishSubscribeClientBuilder();
var daprMessagingClient = clientBuilder.Build();

async Task<TopicResponseAction> HandleMessage(TopicMessage message, CancellationToken cancellationToken = default)
{
try
{
//Do something with the message
Console.WriteLine(Encoding.UTF8.GetString(message.Data.Span));

return await Task.FromResult(TopicResponseAction.Success);
}
catch
{
return await Task.FromResult(TopicResponseAction.Retry);
}
}

//Create a dynamic streaming subscription
var subscription = daprMessagingClient.Register("pubsub", "myTopic",
new DaprSubscriptionOptions(new MessageHandlingPolicy(TimeSpan.FromSeconds(15), TopicResponseAction.Retry)),
HandleMessage, CancellationToken.None);

//Subscribe to messages on it with a timeout of 30 seconds
var cancellationTokenSource = new CancellationTokenSource(TimeSpan.FromSeconds(30));
await subscription.SubscribeAsync(cancellationTokenSource.Token);

await Task.Delay(TimeSpan.FromMinutes(1));

//When you're done with the subscription, simply dispose of it
await subscription.DisposeAsync();
```

{{% /codetab %}}

{{% codetab %}}

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