private async Task <string> CreateUrlMapping(UrlMappingEntity entity)
{
var beforeEntity = await _urlMappingRepository.FindAndExtend(entity);
if (beforeEntity != null)
{
return(beforeEntity.ShortLink);
}
await _urlMappingRepository.AddAsync(entity);
return(entity.ShortLink);
}
public async Task <string> Handle(CreateUrlMappingCommand request, CancellationToken cancellationToken)
{
ValidationResult results = _validator.Validate(request);
if (!results.IsValid)
{
throw new CustomValidationException(results.Errors.First().ErrorMessage);
}
var attempts = 0;
string _out;
do
{
var code = await _codeService.GenerateCodeAsync();
var entity = new UrlMappingEntity(
code,
Path.Combine(clientEndpoint, code),
request.LongUrl,
_dateProvider.Now.AddMinutes(intervalMinutes));
try
{
attempts++;
_out = await CreateUrlMapping(entity);
break;
}
catch (Exception ex)
{
if (attempts == 3)
{
throw new CreateUrlMappingException("Error: create url mapping service not available", ex);
}
}
} while (true);
return(_out);
}