/// <summary>
/// Deposit
/// </summary>
/// <param name="transaction"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task <GrpcService.Account> Deposit(GrpcService.Transaction transaction, ServerCallContext context)
{
_logger.LogDebug("Enter deposit");
var state = await _daprClient.GetStateEntryAsync <Models.Account>(StoreName, transaction.Id);
state.Value ??= new Models.Account()
{
Id = transaction.Id,
};
state.Value.Balance += transaction.Amount;
await state.SaveAsync();
return(new GrpcService.Account()
{
Id = state.Value.Id, Balance = (int)state.Value.Balance,
});
}
/// <summary>
/// Withdraw
/// </summary>
/// <param name="transaction"></param>
/// <param name="context"></param>
/// <returns></returns>
public async Task <GrpcService.Account> Withdraw(GrpcService.Transaction transaction, ServerCallContext context)
{
_logger.LogDebug("Enter withdraw");
var state = await _daprClient.GetStateEntryAsync <Models.Account>(StoreName, transaction.Id);
if (state.Value == null)
{
throw new Exception($"NotFound: {transaction.Id}");
}
state.Value.Balance -= transaction.Amount;
await state.SaveAsync();
return(new GrpcService.Account()
{
Id = state.Value.Id, Balance = (int)state.Value.Balance,
});
}
/// <summary>
/// implement OnTopicEvent to handle deposit and withdraw event
/// </summary>
/// <param name="request"></param>
/// <param name="context"></param>
/// <returns></returns>
public override async Task <TopicEventResponse> OnTopicEvent(TopicEventRequest request, ServerCallContext context)
{
if (request.PubsubName == "pubsub")
{
var input = JsonSerializer.Deserialize <Models.Transaction>(request.Data.ToStringUtf8(), this.jsonOptions);
var transaction = new GrpcService.Transaction()
{
Id = input.Id, Amount = (int)input.Amount,
};
if (request.Topic == "deposit")
{
await Deposit(transaction, context);
}
else
{
await Withdraw(transaction, context);
}
}
return(await Task.FromResult(default(TopicEventResponse)));
}