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

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

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

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

### Parameters

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