# JsonDurableDictionaryCommandCodec<TKey, TValue>.Apply(JournalBufferReader, IDurableDictionaryCommandHandler<TKey, TValue>)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.json.jsondurabledictionarycommandcodec-2/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.json.jsondurabledictionarycommandcodec-2/methods/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Journaling/Formats/Json/JsonDurableDictionaryCommandCodec.cs#L90-L99)

```csharp
public void JsonDurableDictionaryCommandCodec<TKey, Apply(JournalBufferReader input, IDurableDictionaryCommandHandler<TKey, TValue> consumer)
```

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

### Parameters

- `input` (`JournalBufferReader`)
- `consumer` (`IDurableDictionaryCommandHandler<TKey, TValue>`)