# IDurableTaskCompletionSourceCommandCodec<T> Methods

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurabletaskcompletionsourcecommandcodec-1/)

## Apply(JournalBufferReader, IDurableTaskCompletionSourceCommandHandler<T>) {#apply-orleans-journaling-journalbufferreader-orleans-journaling-idurabletaskcomp-081b940f}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurabletaskcompletionsourcecommandcodec-1/methods/apply-orleans-journaling-journalbufferreader-orleans-journaling-idurabletaskcomp-081b940f/)

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

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

### Parameters

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

## WriteCanceled(JournalStreamWriter) {#writecanceled-orleans-journaling-journalstreamwriter-fd9325bd}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurabletaskcompletionsourcecommandcodec-1/methods/writecanceled-orleans-journaling-journalstreamwriter-fd9325bd/)

```csharp
public abstract void WriteCanceled(JournalStreamWriter writer)
```

Writes a canceled command.

### Parameters

- `writer` (`JournalStreamWriter`)

## WriteCompleted(T, JournalStreamWriter) {#writecompleted-t-orleans-journaling-journalstreamwriter-68ff3fe2}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurabletaskcompletionsourcecommandcodec-1/methods/writecompleted-t-orleans-journaling-journalstreamwriter-68ff3fe2/)

```csharp
public abstract void WriteCompleted(T value, JournalStreamWriter writer)
```

Writes a completed command.

### Parameters

- `value` (`T`)
- `writer` (`JournalStreamWriter`)

## WriteFaulted(Exception, JournalStreamWriter) {#writefaulted-system-exception-orleans-journaling-journalstreamwriter-745f7539}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurabletaskcompletionsourcecommandcodec-1/methods/writefaulted-system-exception-orleans-journaling-journalstreamwriter-745f7539/)

```csharp
public abstract void WriteFaulted(Exception exception, JournalStreamWriter writer)
```

Writes a faulted command.

### Parameters

- `exception` (`Exception`)
- `writer` (`JournalStreamWriter`)

## WritePending(JournalStreamWriter) {#writepending-orleans-journaling-journalstreamwriter-895e7edd}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurabletaskcompletionsourcecommandcodec-1/methods/writepending-orleans-journaling-journalstreamwriter-895e7edd/)

```csharp
public abstract void WritePending(JournalStreamWriter writer)
```

Writes a pending command.

### Parameters

- `writer` (`JournalStreamWriter`)