/// <inheritdoc/>
public override async ValueTask <TValue> GetStateAsync <TValue>(
string storeName,
string key,
ConsistencyMode?consistencyMode = default,
Dictionary <string, string> metadata = default,
CancellationToken cancellationToken = default)
{
ArgumentVerifier.ThrowIfNullOrEmpty(storeName, nameof(storeName));
ArgumentVerifier.ThrowIfNullOrEmpty(key, nameof(key));
var getStateEnvelope = new Autogenerated.GetStateRequest()
{
StoreName = storeName,
Key = key,
};
if (metadata != null)
{
getStateEnvelope.Metadata.Add(metadata);
}
if (consistencyMode != null)
{
getStateEnvelope.Consistency = GetStateConsistencyForConsistencyMode(consistencyMode.Value);
}
var response = await this.MakeGrpcCallHandleError(
options => client.GetStateAsync(getStateEnvelope, options),
cancellationToken);
if (response.Data.IsEmpty)
{
return(default);
/// <inheritdoc/>
public override async Task <TValue> GetStateAsync <TValue>(
string storeName,
string key,
ConsistencyMode?consistencyMode = default,
IReadOnlyDictionary <string, string> metadata = default,
CancellationToken cancellationToken = default)
{
ArgumentVerifier.ThrowIfNullOrEmpty(storeName, nameof(storeName));
ArgumentVerifier.ThrowIfNullOrEmpty(key, nameof(key));
var envelope = new Autogenerated.GetStateRequest()
{
StoreName = storeName,
Key = key,
};
if (metadata != null)
{
foreach (var kvp in metadata)
{
envelope.Metadata.Add(kvp.Key, kvp.Value);
}
}
if (consistencyMode != null)
{
envelope.Consistency = GetStateConsistencyForConsistencyMode(consistencyMode.Value);
}
var options = CreateCallOptions(headers: null, cancellationToken);
Autogenerated.GetStateResponse response;
try
{
response = await client.GetStateAsync(envelope, options);
}
catch (RpcException ex)
{
throw new DaprException("State operation failed: the Dapr endpoint indicated a failure. See InnerException for details.", ex);
}
try
{
return(TypeConverters.FromJsonByteString <TValue>(response.Data, this.JsonSerializerOptions));
}
catch (JsonException ex)
{
throw new DaprException("State operation failed: the state payload could not be deserialized. See InnerException for details.", ex);
}
}
public override ValueTask <TValue> GetStateAsync <TValue>(string storeName, string key, ConsistencyMode?consistencyMode = default, CancellationToken cancellationToken = default)
{
ArgumentVerifier.ThrowIfNullOrEmpty(storeName, nameof(storeName));
ArgumentVerifier.ThrowIfNullOrEmpty(key, nameof(key));
if (this.State.TryGetValue(key, out var obj))
{
return(new ValueTask <TValue>((TValue)obj));
}
else
{
return(new ValueTask <TValue>(default(TValue)));
}
}
/// <summary>
/// Gets a <see cref="StateEntry{T}" /> for the current value associated with the <paramref name="key" /> from
/// the Dapr state store.
/// </summary>
/// <param name="storeName">The name of the state store.</param>
/// <param name="key">The state key.</param>
/// <param name="consistencyMode">The consistency mode <see cref="ConsistencyMode" />.</param>
/// <param name="cancellationToken">A <see cref="CancellationToken" /> that can be used to cancel the operation.</param>
/// <typeparam name="TValue">The data type of the value to read.</typeparam>
/// <returns>A <see cref="ValueTask" /> that will return the <see cref="StateEntry{T}" /> when the operation has completed.</returns>
public async ValueTask <StateEntry <TValue> > GetStateEntryAsync <TValue>(string storeName, string key, ConsistencyMode?consistencyMode = default, CancellationToken cancellationToken = default)
{
ArgumentVerifier.ThrowIfNullOrEmpty(storeName, nameof(storeName));
ArgumentVerifier.ThrowIfNullOrEmpty(key, nameof(key));
var(state, etag) = await this.GetStateAndETagAsync <TValue>(storeName, key, consistencyMode, cancellationToken);
return(new StateEntry <TValue>(this, storeName, key, state, etag));
}
/// <summary>
/// Gets the current value associated with the <paramref name="key" /> from the Dapr state store.
/// </summary>
/// <param name="storeName">The name of state store to read from.</param>
/// <param name="key">The state key.</param>
/// <param name="consistencyMode">The consistency mode <see cref="ConsistencyMode" />.</param>
/// <param name="metadata">An key/value pair that may be consumed by the state store. This is dependent on the type of state store used.</param>
/// <param name="cancellationToken">A <see cref="CancellationToken" /> that can be used to cancel the operation.</param>
/// <typeparam name="TValue">The data type of the value to read.</typeparam>
/// <returns>A <see cref="ValueTask{T}" /> that will return the value when the operation has completed.</returns>
public abstract ValueTask <TValue> GetStateAsync <TValue>(string storeName, string key, ConsistencyMode?consistencyMode = default, Dictionary <string, string> metadata = default, CancellationToken cancellationToken = default);
public override Task <TValue> GetStateAsync <TValue>(string storeName, string key, ConsistencyMode?consistencyMode = default, IReadOnlyDictionary <string, string> metadata = default, CancellationToken cancellationToken = default)
{
ArgumentVerifier.ThrowIfNullOrEmpty(storeName, nameof(storeName));
ArgumentVerifier.ThrowIfNullOrEmpty(key, nameof(key));
if (this.State.TryGetValue(key, out var obj))
{
var b = obj as byte[];
if (b != null)
{
return(Task.FromResult(JsonSerializer.Deserialize <TValue>(b)));
}
return(Task.FromResult((TValue)obj));
}
else
{
return(Task.FromResult(default(TValue)));
}
}