public void ComputeHashCode_ReturnsExpected()
{
Application app1 = new Application("app1");
app1.Add(new InstanceInfo()
{
AppName = "app1", InstanceId = "id1", VipAddress = "vapp1", SecureVipAddress = "svapp1", Status = InstanceStatus.DOWN
});
app1.Add(new InstanceInfo()
{
AppName = "app1", InstanceId = "id2", VipAddress = "vapp1", SecureVipAddress = "svapp1", Status = InstanceStatus.DOWN
});
Application app2 = new Application("app2");
app2.Add(new InstanceInfo()
{
AppName = "app2", InstanceId = "id1", VipAddress = "vapp2", SecureVipAddress = "svapp2", Status = InstanceStatus.UP
});
app2.Add(new InstanceInfo()
{
AppName = "app2", InstanceId = "id2", VipAddress = "vapp2", SecureVipAddress = "svapp2", Status = InstanceStatus.OUT_OF_SERVICE
});
var apps = new Applications();
apps.Add(app1);
apps.Add(app2);
var delta = new Applications();
Application app3 = new Application("app3");
app3.Add(new InstanceInfo()
{
AppName = "app3", InstanceId = "id1", VipAddress = "vapp3", SecureVipAddress = "svapp3", Actiontype = ActionType.ADDED, Status = InstanceStatus.STARTING
});
delta.Add(app3);
apps.UpdateFromDelta(delta);
string hashcode = apps.ComputeHashCode();
Assert.Equal("DOWN_2_OUT_OF_SERVICE_1_STARTING_1_UP_1_", hashcode);
}
internal protected async Task <Applications> FetchRegistryDeltaAsync()
{
long startingCounter = _registryFetchCounter;
Applications delta = null;
EurekaHttpResponse <Applications> resp = await HttpClient.GetDeltaAsync();
_logger?.LogDebug("FetchRegistryDelta returned: {0}", resp.StatusCode);
if (resp.StatusCode == HttpStatusCode.OK)
{
delta = resp.Response;
}
if (delta == null)
{
// Log
return(await FetchFullRegistryAsync());
}
if (Interlocked.CompareExchange(ref _registryFetchCounter, ((startingCounter + 1) % long.MaxValue), startingCounter) == startingCounter)
{
_localRegionApps.UpdateFromDelta(delta);
string hashCode = _localRegionApps.ComputeHashCode();
if (!hashCode.Equals(delta.AppsHashCode))
{
_logger?.LogWarning("FetchRegistryDelta discarding delta, hashcodes mismatch: {0}!={1}", hashCode, delta.AppsHashCode);
return(await FetchFullRegistryAsync());
}
else
{
_localRegionApps.AppsHashCode = delta.AppsHashCode;
LastGoodDeltaRegistryFetchTimestamp = DateTime.UtcNow.Ticks;
return(_localRegionApps);
}
}
_logger?.LogDebug("FetchRegistryDelta failed");
return(null);
}
