# IDurableTaskCompletionSourceCommandCodec<T> Package: [Microsoft.Orleans.Journaling](/orleans/docs/api/csharp/microsoft.orleans.journaling/) 10.0.0-alpha.1 [NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Journaling) ```csharp public interface IDurableTaskCompletionSourceCommandCodec ``` Serializes one durable task completion source command and applies one decoded command. ## Methods - [Apply(JournalBufferReader, IDurableTaskCompletionSourceCommandHandler<T>)](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurabletaskcompletionsourcecommandcodec-1/methods/apply-orleans-journaling-journalbufferreader-orleans-journaling-idurabletaskcomp-081b940f/) - [WriteCanceled(JournalStreamWriter)](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurabletaskcompletionsourcecommandcodec-1/methods/writecanceled-orleans-journaling-journalstreamwriter-fd9325bd/) - [WriteCompleted(T, JournalStreamWriter)](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurabletaskcompletionsourcecommandcodec-1/methods/writecompleted-t-orleans-journaling-journalstreamwriter-68ff3fe2/) - [WriteFaulted(Exception, JournalStreamWriter)](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurabletaskcompletionsourcecommandcodec-1/methods/writefaulted-system-exception-orleans-journaling-journalstreamwriter-745f7539/) - [WritePending(JournalStreamWriter)](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.idurabletaskcompletionsourcecommandcodec-1/methods/writepending-orleans-journaling-journalstreamwriter-895e7edd/)