public async Task <RemoteCallBackData> InvokeAsync(List <ServerAddress> service, string serviceIdOrPath, IDictionary <string, object> paras, string token)
{
ServerAddress desc = await _addressSelector.GetAddressAsync(service);
if (paras == null)
{
paras = new ConcurrentDictionary <string, object>();
}
if (_retryTimes < 0)
{
_retryTimes = service.Count;
}
RemoteCallBackData result = null;
Polly.Retry.RetryPolicy retryPolicy = Policy.Handle <Exception>()
.RetryAsync(_retryTimes,
async(ex, count) =>
{
desc = await _addressSelector.GetAddressAsync(service);
_logger.Debug(
$"FaultHandling,retry times: {count},serviceId: {serviceIdOrPath},Address: {desc.Code},RemoteServiceCaller excute retry by Polly for exception {ex.Message}");
});
Polly.Wrap.PolicyWrap <RemoteCallBackData> fallbackPolicy = Policy <RemoteCallBackData> .Handle <Exception>()
.FallbackAsync(new RemoteCallBackData()
{
ErrorCode = "500", ErrorMsg = "error occur when communicate with server. server maybe have been down."
})
.WrapAsync(retryPolicy);
return(await fallbackPolicy.ExecuteAsync(async() =>
{
ITransportClient client = _transportClientFactory.CreateClient(desc);
if (client == null)
{
return new RemoteCallBackData
{
ErrorCode = "400",
ErrorMsg = "服务不可用"
};
}
_logger.Debug($"invoke: serviceId:{serviceIdOrPath}, parameters count: {paras.Count()}, token:{token}");
Payload payload = new Payload();
if (!string.IsNullOrEmpty(token) && _authorizationHandler != null && desc.EnableAuthorization)
{
var authorizationContext = _authorizationHandler.GetAuthorizationContext(token, desc.Roles);
if (authorizationContext != null)
{
payload.Items = authorizationContext;
}
else
{
return new RemoteCallBackData
{
ErrorMsg = "没有权限",
ErrorCode = "401"
};
}
}
result = await client.SendAsync(new RemoteCallData
{
Payload = payload,
Parameters = paras,
ServiceId = serviceIdOrPath,
Token = token,
});
return result;
}));
}
