static async Task PollyTest()
{
var atr = new CRL.Core.Remoting.PollyAttribute();
//atr.TimeOutTime = TimeSpan.FromMilliseconds(100);
atr.CircuitBreakerCount = 2;
atr.RetryCount = 1;
var pollyCtx = new Polly.Context();
var response = await PollyExtension.InvokeAsync <string>(atr, async() =>
{
//await Task.Delay(200);
throw new Exception("has error");
return(await Task.FromResult(new CRL.Core.Remoting.PollyExtension.PollyData <string>()
{
Data = "ok"
}));
}, "");
if (pollyCtx.ContainsKey("msg"))
{
Console.WriteLine(pollyCtx["msg"]);
}
//var str = PollyExtension.Invoke(atr, () =>
// {
// throw new Exception("has error");
// //System.Threading.Thread.Sleep(200);
// return new PollyExtension.PollyData<string>() { Error = "ok" };
// }, "test");
Console.WriteLine(response.ToJson());
}
protected T SendRequest <T>(PollyAttribute pollyAttr, Request.ImitateWebRequest request, string url, string httpMethod, string postArgs, string pollyKey, Func <string, T> dataCall)
{
//var pollyCtx = new Polly.Context();
var pollyData = PollyExtension.Invoke(pollyAttr, () =>
{
var res = request.SendData(url, httpMethod.ToString(), postArgs, out string url2);
return(new PollyExtension.PollyData <string>()
{
Data = res
});
}, pollyKey);
if (!string.IsNullOrEmpty(pollyData.Error))
{
ThrowError(pollyData.Error, "500");
}
//转换为指定的类型
return(dataCall(pollyData.Data));
}
protected async Task <T> SendRequestAsync <T>(PollyAttribute pollyAttr, Request.ImitateWebRequest request, string url, string httpMethod, string postArgs, string pollyKey, Func <string, T> dataCall)
{
var pollyCtx = new Polly.Context();
//var response = await request.SendDataAsync(url, httpMethod.ToString(), postArgs);
var pollyData = await PollyExtension.InvokeAsync(pollyAttr, async() =>
{
var res = await request.SendDataAsync(url, httpMethod.ToString(), postArgs);
return(new PollyExtension.PollyData <string>()
{
Data = res
});
}, pollyKey);
if (!string.IsNullOrEmpty(pollyData.Error))
{
ThrowError(pollyData.Error, "500");
}
//转换为指定的类型
return(dataCall(pollyData.Data));
}
public static PollyData <T> Invoke <T>(PollyAttribute atr, Func <PollyData <T> > task, string policyKey)
{
if (atr == null)
{
try
{
return(task());
}
catch (Exception ero)
{
var msg = ero.Message;
if (ero is Request.RequestException)
{
msg = (ero as Request.RequestException).ToString();
}
return(new PollyData <T>()
{
Error = $"接口调用发生错误:{msg}"
});
}
}
Policy <PollyData <T> > policy;
var a = policies.TryGetValue(policyKey, out object _policy);
if (_policy == null)
{
policy = Policy.NoOp <PollyData <T> >();
if (atr.CircuitBreakerCount > 0)//熔断
{
policy = policy.Wrap(Policy.Handle <Exception>().CircuitBreaker(atr.CircuitBreakerCount, atr.CircuitBreakerTime));
var policyFallBack = Policy <PollyData <T> > .Handle <Polly.CircuitBreaker.BrokenCircuitException>()
.Fallback(() =>
{
return(new PollyData <T>()
{
Error = "接口调用被熔断"
});
});
policy = policyFallBack.Wrap(policy);
}
if (atr.TimeOutTime > TimeSpan.Zero)//超时
{
policy = policy.Wrap(Policy.Timeout(() => atr.TimeOutTime, Polly.Timeout.TimeoutStrategy.Pessimistic));
var policyFallBack = Policy <PollyData <T> > .Handle <Polly.Timeout.TimeoutRejectedException>()
.Fallback(() =>
{
return(new PollyData <T>()
{
Error = "接口调用超时"
});
});
policy = policyFallBack.Wrap(policy);
}
if (atr.RetryCount > 0)//重试
{
policy = policy.Wrap(Policy.Handle <Exception>().WaitAndRetry(atr.RetryCount, b => atr.RetryInterval));
}
policies.TryAdd(policyKey, policy);
}
else
{
policy = _policy as Policy <PollyData <T> >;
}
try
{
return(policy.Execute(task));
}
catch (Exception ero)
{
var msg = ero.Message;
if (ero is Request.RequestException)
{
msg = (ero as Request.RequestException).ToString();
}
return(new PollyData <T>()
{
Error = $"接口调用发生错误:{msg}"
});
}
}
public static async Task <PollyData <T> > InvokeAsync <T>(PollyAttribute atr, Func <Task <PollyData <T> > > task, string policyKey)
{
if (atr == null)
{
try
{
return(await task());
}
catch (Exception ero)
{
var msg = ero.Message;
var errorCode = "";
if (ero is Request.RequestException)
{
var requestException = ero as Request.RequestException;
errorCode = requestException.ErrorCode;
msg = requestException.ToString();
}
return(new PollyData <T>()
{
Error = $"接口调用发生错误:{msg}", ErrorCode = errorCode
});
}
}
Policy <PollyData <T> > policy;
var a = policies.TryGetValue(policyKey, out object _policy);
if (_policy == null)
{
policy = Policy.NoOpAsync <PollyData <T> >();
if (atr.CircuitBreakerCount > 0)//熔断
{
policy = policy.WrapAsync(Policy.Handle <Exception>().CircuitBreakerAsync(atr.CircuitBreakerCount, atr.CircuitBreakerTime));
var policyFallBack = Policy <PollyData <T> >
.Handle <Polly.CircuitBreaker.BrokenCircuitException>()
.FallbackAsync((ctx, t) =>
{
return(Task.FromResult(new PollyData <T>()
{
Error = "接口调用被熔断"
}));
}, (ex, t) =>
{
return(Task.FromResult <PollyData <T> >(null));
});
policy = policyFallBack.WrapAsync(policy);
}
if (atr.TimeOutTime > TimeSpan.Zero)//超时
{
policy = policy.WrapAsync(Policy.TimeoutAsync(() => atr.TimeOutTime, Polly.Timeout.TimeoutStrategy.Pessimistic));
var policyFallBack = Policy <PollyData <T> >
.Handle <Polly.Timeout.TimeoutRejectedException>()
.FallbackAsync((ctx, t) =>
{
return(Task.FromResult(new PollyData <T>()
{
Error = "接口调用超时"
}));
}, (ex, t) =>
{
return(Task.FromResult <PollyData <T> >(null));
});
policy = policyFallBack.WrapAsync(policy);
}
if (atr.RetryCount > 0)//重试
{
policy = policy.WrapAsync(Policy.Handle <Exception>().WaitAndRetryAsync(atr.RetryCount, b => atr.RetryInterval));
}
policies.TryAdd(policyKey, policy);
}
else
{
policy = _policy as Policy <PollyData <T> >;
}
try
{
return(await policy.ExecuteAsync(task));
}
catch (Exception ero)
{
var msg = ero.Message;
if (ero is Request.RequestException)
{
msg = (ero as Request.RequestException).ToString();
}
return(new PollyData <T>()
{
Error = $"接口调用发生错误:{msg}"
});
}
}
