# JsonDurableTaskCompletionSourceCommandCodec<T>.Apply(JournalBufferReader, IDurableTaskCompletionSourceCommandHandler<T>)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.json.jsondurabletaskcompletionsourcecommandcodec-1/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.json.jsondurabletaskcompletionsourcecommandcodec-1/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Journaling/Formats/Json/JsonDurableValueCommandCodecs.cs#L179-L188)

```csharp
public void Apply(JournalBufferReader input, IDurableTaskCompletionSourceCommandHandler<T> consumer)
```

Reads one encoded command and applies it to `consumer`.

### Parameters

- `input` (`JournalBufferReader`)
- `consumer` (`IDurableTaskCompletionSourceCommandHandler<T>`)