#### [Abblix\.SharedSignals](https://www.abblix.com/en/docs/api/abblix-sharedsignals 'index')
### [Abblix\.SharedSignals\.Transmitter](https://www.abblix.com/en/docs/api/abblix-sharedsignals/Abblix.SharedSignals.Transmitter 'Abblix\.SharedSignals\.Transmitter')

## IStreamStore Interface

Where a transmitter keeps its streams\. The contract is deliberately a plain keyed store over
immutable snapshots: the Management API owns the SSF semantics, the store owns nothing but
persistence, and a durable implementation \- a database in the host application \- replaces
the in\-memory one without either side changing\.

```csharp
public interface IStreamStore
```

Derived  
↳ [ConfigurationStreamStore](https://www.abblix.com/en/docs/api/abblix-sharedsignals/Abblix.SharedSignals.Transmitter.ConfigurationStreamStore 'Abblix\.SharedSignals\.Transmitter\.ConfigurationStreamStore')  
↳ [InMemoryStreamStore](https://www.abblix.com/en/docs/api/abblix-sharedsignals/Abblix.SharedSignals.Transmitter.InMemoryStreamStore 'Abblix\.SharedSignals\.Transmitter\.InMemoryStreamStore')
### Methods

## IStreamStore\.DeleteAsync\(string, string, CancellationToken\) Method {#Abblix.SharedSignals.Transmitter.IStreamStore.DeleteAsync(string,string,System.Threading.CancellationToken)}

Deletes a stream \(SSF 1\.0 Section 8\.1\.1\.5\)\.

```csharp
System.Threading.Tasks.Task<bool> DeleteAsync(string receiverId, string streamId, System.Threading.CancellationToken cancellationToken=default(System.Threading.CancellationToken));
```
#### Parameters

###### `receiverId` [System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String') {#Abblix.SharedSignals.Transmitter.IStreamStore.DeleteAsync(string,string,System.Threading.CancellationToken).receiverId}

The receiver the stream belongs to\.

###### `streamId` [System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String') {#Abblix.SharedSignals.Transmitter.IStreamStore.DeleteAsync(string,string,System.Threading.CancellationToken).streamId}

The stream's identifier\.

###### `cancellationToken` [System\.Threading\.CancellationToken](https://learn.microsoft.com/en-us/dotnet/api/system.threading.cancellationtoken 'System\.Threading\.CancellationToken') {#Abblix.SharedSignals.Transmitter.IStreamStore.DeleteAsync(string,string,System.Threading.CancellationToken).cancellationToken}

Cancels I/O a durable implementation performs\.

#### Returns
[System\.Threading\.Tasks\.Task&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')[System\.Boolean](https://learn.microsoft.com/en-us/dotnet/api/system.boolean 'System\.Boolean')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')  
True when deleted; false when no such stream existed\.

## IStreamStore\.FindAsync\(string, string, CancellationToken\) Method {#Abblix.SharedSignals.Transmitter.IStreamStore.FindAsync(string,string,System.Threading.CancellationToken)}

Finds one stream of one receiver\.

```csharp
System.Threading.Tasks.Task<Abblix.SharedSignals.Transmitter.StreamState?> FindAsync(string receiverId, string streamId, System.Threading.CancellationToken cancellationToken=default(System.Threading.CancellationToken));
```
#### Parameters

###### `receiverId` [System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String') {#Abblix.SharedSignals.Transmitter.IStreamStore.FindAsync(string,string,System.Threading.CancellationToken).receiverId}

The receiver the stream belongs to\.

###### `streamId` [System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String') {#Abblix.SharedSignals.Transmitter.IStreamStore.FindAsync(string,string,System.Threading.CancellationToken).streamId}

The stream's identifier\.

###### `cancellationToken` [System\.Threading\.CancellationToken](https://learn.microsoft.com/en-us/dotnet/api/system.threading.cancellationtoken 'System\.Threading\.CancellationToken') {#Abblix.SharedSignals.Transmitter.IStreamStore.FindAsync(string,string,System.Threading.CancellationToken).cancellationToken}

Cancels I/O a durable implementation performs\.

#### Returns
[System\.Threading\.Tasks\.Task&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')[StreamState](https://www.abblix.com/en/docs/api/abblix-sharedsignals/Abblix.SharedSignals.Transmitter.StreamState 'Abblix\.SharedSignals\.Transmitter\.StreamState')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')  
The stream's state, or null when no such stream exists for this receiver\.

## IStreamStore\.ListAllAsync\(CancellationToken\) Method {#Abblix.SharedSignals.Transmitter.IStreamStore.ListAllAsync(System.Threading.CancellationToken)}

Lists every stream of every receiver \- the dispatcher's view, since an event is matched
against all streams at once\.

```csharp
System.Threading.Tasks.Task<System.Collections.Generic.IReadOnlyList<Abblix.SharedSignals.Transmitter.StreamState>> ListAllAsync(System.Threading.CancellationToken cancellationToken=default(System.Threading.CancellationToken));
```
#### Parameters

###### `cancellationToken` [System\.Threading\.CancellationToken](https://learn.microsoft.com/en-us/dotnet/api/system.threading.cancellationtoken 'System\.Threading\.CancellationToken') {#Abblix.SharedSignals.Transmitter.IStreamStore.ListAllAsync(System.Threading.CancellationToken).cancellationToken}

Cancels I/O a durable implementation performs\.

#### Returns
[System\.Threading\.Tasks\.Task&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')[System\.Collections\.Generic\.IReadOnlyList&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.ireadonlylist-1 'System\.Collections\.Generic\.IReadOnlyList\`1')[StreamState](https://www.abblix.com/en/docs/api/abblix-sharedsignals/Abblix.SharedSignals.Transmitter.StreamState 'Abblix\.SharedSignals\.Transmitter\.StreamState')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.ireadonlylist-1 'System\.Collections\.Generic\.IReadOnlyList\`1')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')

## IStreamStore\.ListAsync\(string, CancellationToken\) Method {#Abblix.SharedSignals.Transmitter.IStreamStore.ListAsync(string,System.Threading.CancellationToken)}

Lists the streams of one receiver, for the list form of the configuration read
\(SSF 1\.0 Section 8\.1\.1\.2\)\. An empty list is a receiver with no streams, never an error\.

```csharp
System.Threading.Tasks.Task<System.Collections.Generic.IReadOnlyList<Abblix.SharedSignals.Transmitter.StreamState>> ListAsync(string receiverId, System.Threading.CancellationToken cancellationToken=default(System.Threading.CancellationToken));
```
#### Parameters

###### `receiverId` [System\.String](https://learn.microsoft.com/en-us/dotnet/api/system.string 'System\.String') {#Abblix.SharedSignals.Transmitter.IStreamStore.ListAsync(string,System.Threading.CancellationToken).receiverId}

The receiver whose streams are listed\.

###### `cancellationToken` [System\.Threading\.CancellationToken](https://learn.microsoft.com/en-us/dotnet/api/system.threading.cancellationtoken 'System\.Threading\.CancellationToken') {#Abblix.SharedSignals.Transmitter.IStreamStore.ListAsync(string,System.Threading.CancellationToken).cancellationToken}

Cancels I/O a durable implementation performs\.

#### Returns
[System\.Threading\.Tasks\.Task&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')[System\.Collections\.Generic\.IReadOnlyList&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.ireadonlylist-1 'System\.Collections\.Generic\.IReadOnlyList\`1')[StreamState](https://www.abblix.com/en/docs/api/abblix-sharedsignals/Abblix.SharedSignals.Transmitter.StreamState 'Abblix\.SharedSignals\.Transmitter\.StreamState')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.ireadonlylist-1 'System\.Collections\.Generic\.IReadOnlyList\`1')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')

## IStreamStore\.TryCreateAsync\(StreamState, CancellationToken\) Method {#Abblix.SharedSignals.Transmitter.IStreamStore.TryCreateAsync(Abblix.SharedSignals.Transmitter.StreamState,System.Threading.CancellationToken)}

Stores a new stream\.

```csharp
System.Threading.Tasks.Task<bool> TryCreateAsync(Abblix.SharedSignals.Transmitter.StreamState stream, System.Threading.CancellationToken cancellationToken=default(System.Threading.CancellationToken));
```
#### Parameters

###### `stream` [StreamState](https://www.abblix.com/en/docs/api/abblix-sharedsignals/Abblix.SharedSignals.Transmitter.StreamState 'Abblix\.SharedSignals\.Transmitter\.StreamState') {#Abblix.SharedSignals.Transmitter.IStreamStore.TryCreateAsync(Abblix.SharedSignals.Transmitter.StreamState,System.Threading.CancellationToken).stream}

The stream's initial state\.

###### `cancellationToken` [System\.Threading\.CancellationToken](https://learn.microsoft.com/en-us/dotnet/api/system.threading.cancellationtoken 'System\.Threading\.CancellationToken') {#Abblix.SharedSignals.Transmitter.IStreamStore.TryCreateAsync(Abblix.SharedSignals.Transmitter.StreamState,System.Threading.CancellationToken).cancellationToken}

Cancels I/O a durable implementation performs\.

#### Returns
[System\.Threading\.Tasks\.Task&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')[System\.Boolean](https://learn.microsoft.com/en-us/dotnet/api/system.boolean 'System\.Boolean')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')  
True when stored; false when a stream with the same receiver and identifier
            already exists\.

## IStreamStore\.UpdateAsync\(StreamState, CancellationToken\) Method {#Abblix.SharedSignals.Transmitter.IStreamStore.UpdateAsync(Abblix.SharedSignals.Transmitter.StreamState,System.Threading.CancellationToken)}

Replaces a stream's state with a new snapshot, keyed by its receiver and identifier\.

```csharp
System.Threading.Tasks.Task<bool> UpdateAsync(Abblix.SharedSignals.Transmitter.StreamState stream, System.Threading.CancellationToken cancellationToken=default(System.Threading.CancellationToken));
```
#### Parameters

###### `stream` [StreamState](https://www.abblix.com/en/docs/api/abblix-sharedsignals/Abblix.SharedSignals.Transmitter.StreamState 'Abblix\.SharedSignals\.Transmitter\.StreamState') {#Abblix.SharedSignals.Transmitter.IStreamStore.UpdateAsync(Abblix.SharedSignals.Transmitter.StreamState,System.Threading.CancellationToken).stream}

The new state\.

###### `cancellationToken` [System\.Threading\.CancellationToken](https://learn.microsoft.com/en-us/dotnet/api/system.threading.cancellationtoken 'System\.Threading\.CancellationToken') {#Abblix.SharedSignals.Transmitter.IStreamStore.UpdateAsync(Abblix.SharedSignals.Transmitter.StreamState,System.Threading.CancellationToken).cancellationToken}

Cancels I/O a durable implementation performs\.

#### Returns
[System\.Threading\.Tasks\.Task&lt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')[System\.Boolean](https://learn.microsoft.com/en-us/dotnet/api/system.boolean 'System\.Boolean')[&gt;](https://learn.microsoft.com/en-us/dotnet/api/system.threading.tasks.task-1 'System\.Threading\.Tasks\.Task\`1')  
True when replaced; false when no such stream exists to replace\.