# JsonDurableSetCommandCodec<T> Methods

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

## Apply(JournalBufferReader, IDurableSetCommandHandler<T>) {#apply-orleans-journaling-journalbufferreader-orleans-journaling-idurablesetcomma-d874114c}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.json.jsondurablesetcommandcodec-1/methods/apply-orleans-journaling-journalbufferreader-orleans-journaling-idurablesetcomma-d874114c/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Journaling/Formats/Json/JsonDurableCollectionCommandCodecs.cs#L347-L356)

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

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

### Parameters

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

## WriteAdd(T, JournalStreamWriter) {#writeadd-t-orleans-journaling-journalstreamwriter-713ec0a9}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.json.jsondurablesetcommandcodec-1/methods/writeadd-t-orleans-journaling-journalstreamwriter-713ec0a9/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Journaling/Formats/Json/JsonDurableCollectionCommandCodecs.cs#L286-L294)

```csharp
public void WriteAdd(T item, JournalStreamWriter writer)
```

Writes an add command.

### Parameters

- `item` (`T`)
- `writer` (`JournalStreamWriter`)

## WriteClear(JournalStreamWriter) {#writeclear-orleans-journaling-journalstreamwriter-a2e7594a}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.json.jsondurablesetcommandcodec-1/methods/writeclear-orleans-journaling-journalstreamwriter-a2e7594a/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Journaling/Formats/Json/JsonDurableCollectionCommandCodecs.cs#L312-L316)

```csharp
public void WriteClear(JournalStreamWriter writer)
```

Writes a clear command.

### Parameters

- `writer` (`JournalStreamWriter`)

## WriteRemove(T, JournalStreamWriter) {#writeremove-t-orleans-journaling-journalstreamwriter-d751ec58}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.json.jsondurablesetcommandcodec-1/methods/writeremove-t-orleans-journaling-journalstreamwriter-d751ec58/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Journaling/Formats/Json/JsonDurableCollectionCommandCodecs.cs#L299-L307)

```csharp
public void WriteRemove(T item, JournalStreamWriter writer)
```

Writes a remove command.

### Parameters

- `item` (`T`)
- `writer` (`JournalStreamWriter`)

## WriteSnapshot(IReadOnlyCollection&lt;T&gt;, JournalStreamWriter) {#writesnapshot-system-collections-generic-ireadonlycollection-t-orleans-journalin-507cbe66}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.journaling/orleans.journaling.json.jsondurablesetcommandcodec-1/methods/writesnapshot-system-collections-generic-ireadonlycollection-t-orleans-journalin-507cbe66/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Journaling/Formats/Json/JsonDurableCollectionCommandCodecs.cs#L321-L342)

```csharp
public void WriteSnapshot(IReadOnlyCollection<T> items, JournalStreamWriter writer)
```

Writes a snapshot command, deriving the item count from `items`.

### Parameters

- `items` (`IReadOnlyCollection<T>`)
- `writer` (`JournalStreamWriter`)