protected override async Task <EventPosition> GetLastEventPosition(CancellationToken cancellationToken)
{
// Subscription metrics are sampled each 60 sec, so we need to use an extended period
var interval = new TimeInterval {
StartTime = Timestamp.FromDateTime(DateTime.UtcNow - TimeSpan.FromMinutes(2)),
EndTime = Timestamp.FromDateTime(DateTime.UtcNow)
};
var undelivered = await GetPoint(_undeliveredCountRequest);
var oldestAge = await GetPoint(_oldestAgeRequest);
var age = oldestAge == null ? DateTime.UtcNow : DateTime.UtcNow.AddSeconds(-oldestAge.Value.Int64Value);
return(new EventPosition((ulong?)undelivered?.Value?.Int64Value, age));
async Task <Point?> GetPoint(ListTimeSeriesRequest request)
{
request.Interval = interval;
var result = _metricClient.ListTimeSeriesAsync(request);
var page = await result.ReadPageAsync(1, cancellationToken);
return(page.FirstOrDefault()?.Points?.FirstOrDefault());
}
}
public async ValueTask <SubscriptionGap> GetSubscriptionGap(CancellationToken cancellationToken)
{
if (!_monitoringEnabled)
{
return(new SubscriptionGap(_subscriptionId, 0, TimeSpan.Zero));
}
var now = DateTime.UtcNow;
// Subscription metrics are sampled each 60 sec, so we need to use an extended period
var interval = new TimeInterval {
StartTime = Timestamp.FromDateTime(now - TimeSpan.FromMinutes(2)),
EndTime = Timestamp.FromDateTime(now)
};
var undelivered = await GetPoint(_undeliveredCountRequest).NoContext();
var oldestAge = await GetPoint(_oldestAgeRequest).NoContext();
var age = oldestAge == null
? TimeSpan.Zero
: TimeSpan.FromSeconds(oldestAge.Value.Int64Value);
return(new SubscriptionGap(_subscriptionId, (ulong)(undelivered?.Value?.Int64Value ?? 0), age));
async Task <Point?> GetPoint(ListTimeSeriesRequest request)
{
request.Interval = interval;
var result = _metricClient.ListTimeSeriesAsync(request);
var page = await result.ReadPageAsync(1, cancellationToken).NoContext();
return(page.FirstOrDefault()?.Points?.FirstOrDefault());
}
}
/// <summary>Snippet for ListTimeSeriesAsync</summary>
public async Task ListTimeSeriesAsync_RequestObject()
{
// Snippet: ListTimeSeriesAsync(ListTimeSeriesRequest,CallSettings)
// Create client
MetricServiceClient metricServiceClient = await MetricServiceClient.CreateAsync();
// Initialize request argument(s)
ListTimeSeriesRequest request = new ListTimeSeriesRequest
{
ProjectName = new ProjectName("[PROJECT]"),
Filter = "",
Interval = new TimeInterval(),
View = ListTimeSeriesRequest.Types.TimeSeriesView.Full,
};
// Make the request
PagedAsyncEnumerable <ListTimeSeriesResponse, TimeSeries> response =
metricServiceClient.ListTimeSeriesAsync(request);
// Iterate over all response items, lazily performing RPCs as required
await response.ForEachAsync((TimeSeries item) =>
{
// Do something with each item
Console.WriteLine(item);
});
// Or iterate over pages (of server-defined size), performing one RPC per page
await response.AsRawResponses().ForEachAsync((ListTimeSeriesResponse page) =>
{
// Do something with each page of items
Console.WriteLine("A page of results:");
foreach (TimeSeries item in page)
{
Console.WriteLine(item);
}
});
// Or retrieve a single page of known size (unless it's the final page), performing as many RPCs as required
int pageSize = 10;
Page <TimeSeries> singlePage = await response.ReadPageAsync(pageSize);
// Do something with the page of items
Console.WriteLine($"A page of {pageSize} results (unless it's the final page):");
foreach (TimeSeries item in singlePage)
{
Console.WriteLine(item);
}
// Store the pageToken, for when the next page is required.
string nextPageToken = singlePage.NextPageToken;
// End snippet
}
public async Task ListTimeSeriesAsync()
{
// Snippet: ListTimeSeriesAsync(string,string,TimeInterval,ListTimeSeriesRequest.Types.TimeSeriesView,string,int?,CallSettings)
// Create client
MetricServiceClient metricServiceClient = MetricServiceClient.Create();
// Initialize request argument(s)
string formattedName = MetricServiceClient.FormatProjectName("[PROJECT]");
string filter = "";
TimeInterval interval = new TimeInterval();
ListTimeSeriesRequest.Types.TimeSeriesView view = ListTimeSeriesRequest.Types.TimeSeriesView.Full;
// Make the request
IPagedAsyncEnumerable <ListTimeSeriesResponse, TimeSeries> response =
metricServiceClient.ListTimeSeriesAsync(formattedName, filter, interval, view);
// Iterate over all response items, lazily performing RPCs as required
await response.ForEachAsync((TimeSeries item) =>
{
// Do something with each item
Console.WriteLine(item);
});
// Or iterate over fixed-sized pages, lazily performing RPCs as required
int pageSize = 10;
IAsyncEnumerable <FixedSizePage <TimeSeries> > fixedSizePages = response.AsPages().WithFixedSize(pageSize);
await fixedSizePages.ForEachAsync((FixedSizePage <TimeSeries> page) =>
{
// Do something with each page of items
Console.WriteLine("A page of results:");
foreach (TimeSeries item in page)
{
Console.WriteLine(item);
}
});
// End snippet
}