public void TestFailureOnRetryTransientError()
{
var attempt = 0;
var server = SampleApiMock.CreateLocalServer(() =>
{
attempt++;
return(null);
});
server.Start();
try
{
var serverUrl = GrpcServerUtil.GetServerUrl(server);
var channelManager = new GrpcChannelManager(
new string[] { serverUrl },
timeout: TimeSpan.FromMilliseconds(200),
maxRetry: 3);
var lbCallInvoker = channelManager.GetCallInvoker();
var client = new SampleApi.SampleApiClient(lbCallInvoker);
Assert.Throws <RpcException>(() => client.SampleRpcMethod(new SampleRequest()
{
Payload = ""
}));
Assert.AreEqual(3, attempt);
}
finally
{
server.ShutdownAsync().Wait();
}
}
public void TestOnErrorAsync()
{
var channelManager = new GrpcChannelManager(new string[] { "randomhost" }, TimeSpan.FromMilliseconds(10), maxRetry: 3);
var callInvoker = channelManager.GetCallInvoker();
var client = new SampleApi.SampleApiClient(callInvoker);
var attemptList = new List <int>();
var errorList = new List <Exception>();
channelManager.OnError += (obj, args) =>
{
attemptList.Add(args.AttemptCount);
errorList.Add(args.Error);
};
Assert.ThrowsAsync <RpcException>(async() => await client.SampleRpcMethodAsync(new SampleRequest()
{
Payload = ""
}));
Assert.AreEqual(attemptList, new List <int>()
{
1, 2, 3
});
Assert.IsTrue(errorList.All(e => e is RpcException));
}
public void TestNullTimeoutNotFail()
{
var server = SampleApiMock.CreateLocalServer(() =>
{
return(Task.FromResult(new SampleResponse()
{
Payload = "success"
}));
});
server.Start();
try
{
var serverUrl = GrpcServerUtil.GetServerUrl(server);
var channelManager = new GrpcChannelManager(
new string[] { serverUrl },
timeout: null,
maxRetry: 3);
var lbCallInvoker = channelManager.GetCallInvoker();
var client = new SampleApi.SampleApiClient(lbCallInvoker);
var result = client.SampleRpcMethod(new SampleRequest()
{
Payload = ""
});
Assert.AreEqual("success", result.Payload);
}
finally
{
server.ShutdownAsync().Wait();
}
}
public void TestUpdateResourcesOnClient()
{
var server1 = SampleApiMock.CreateLocalServer(() =>
{
return(Task.FromResult(new SampleResponse()
{
Payload = "server1"
}));
});
var server2 = SampleApiMock.CreateLocalServer(() =>
{
return(Task.FromResult(new SampleResponse()
{
Payload = "server2"
}));
});
server1.Start();
server2.Start();
try
{
var server1Url = GrpcServerUtil.GetServerUrl(server1);
var server2Url = GrpcServerUtil.GetServerUrl(server2);
var channelManager = new GrpcChannelManager(
new string[] { server1Url },
timeout: TimeSpan.FromMilliseconds(200));
var lbCallInvoker = channelManager.GetCallInvoker();
var client = new SampleApi.SampleApiClient(lbCallInvoker);
var result1 = client.SampleRpcMethod(new SampleRequest()
{
Payload = ""
});
Assert.AreEqual(result1.Payload, "server1");
channelManager.UpdateResources(new string[] { server2Url });
var result2 = client.SampleRpcMethod(new SampleRequest()
{
Payload = ""
});
Assert.AreEqual(result2.Payload, "server2");
}
finally
{
server1.ShutdownAsync().Wait();
server2.ShutdownAsync().Wait();
}
}
public async Task TestSuccessOnRetryAsync()
{
var attempt = 0;
var server = SampleApiMock.CreateLocalServer(() =>
{
if (attempt == 2)
{
return(Task.FromResult(new SampleResponse()
{
Payload = "success!"
}));
}
else
{
attempt++;
return(null);
}
});
server.Start();
try
{
var serverUrl = GrpcServerUtil.GetServerUrl(server);
var channelManager = new GrpcChannelManager(
new string[] { serverUrl },
timeout: TimeSpan.FromMilliseconds(200),
maxRetry: 3);
var lbCallInvoker = channelManager.GetCallInvoker();
var client = new SampleApi.SampleApiClient(lbCallInvoker);
var result = await client.SampleRpcMethodAsync(new SampleRequest()
{
Payload = ""
}).ResponseAsync;
Assert.AreEqual(2, attempt);
Assert.AreEqual("success!", result.Payload);
}
finally
{
server.ShutdownAsync().Wait();
}
}
public void TestRetryOnDeadlineExceeded()
{
var attempt = 0;
var server = SampleApiMock.CreateLocalServer(async() =>
{
attempt++;
await Task.Delay(5000);
return(new SampleResponse()
{
Payload = ""
});
});
server.Start();
try
{
var serverUrl = GrpcServerUtil.GetServerUrl(server);
var channelManager = new GrpcChannelManager(
new string[] { serverUrl },
timeout: TimeSpan.FromMilliseconds(200),
maxRetry: 3);
var lbCallInvoker = channelManager.GetCallInvoker();
var client = new SampleApi.SampleApiClient(lbCallInvoker);
var e = Assert.Throws <RpcException>(() => client.SampleRpcMethod(new SampleRequest()
{
Payload = ""
}));
Assert.IsTrue(e is RpcException);
Assert.AreEqual((e as RpcException).StatusCode, StatusCode.DeadlineExceeded);
Assert.AreEqual(3, attempt);
}
finally
{
server.ShutdownAsync().Wait();
}
}
