private void LogPublishedDate <T>(object sender, T e) where T : DataUpdateEventArgs
{
var publishedDate = pipeline
.GetElement <DeviceDetectionHashEngine>()
.DataFiles
.Single()
.DataPublishedDateTime;
if (e is DataUpdateCompleteArgs completeArgs)
{
Console.WriteLine($"Update completed. Status {completeArgs.Status}");
// Set the event wait handler once the update is completed.
ewh.Set();
}
else
{
Console.WriteLine($"Update started for {e.DataFile.DataFilePath}");
}
Console.WriteLine($"Data file published date: {publishedDate}");
}
TElement IPipeline.GetElement <TElement>()
{
return(_pipeline.GetElement <TElement>());
}
public void Run(string originalDataFile, string licenseKey)
{
// Copy the original data file to another location as we do not
// want to preserve the original for other examples.
File.Copy(originalDataFile, dataFile, true);
// Create an event wait handler to wait for the update complete
//event so that the example runs during the update process.
ewh = new EventWaitHandle(false, EventResetMode.AutoReset);
FileInfo f = new FileInfo(dataFile);
Console.WriteLine($"Using data file at '{f.FullName}'");
// Construct our own data update service so we can monitor update events.
var loggerFactory = new LoggerFactory();
var httpClient = new HttpClient();
var dataUpdateService = new DataUpdateService(loggerFactory.CreateLogger <DataUpdateService>(), httpClient);
// Bind a method to the CheckForUpdateComplete event and
// the CheckForUpdateStarted event which
// prints the published date of the data file.
dataUpdateService.CheckForUpdateComplete += LogPublishedDate;
dataUpdateService.CheckForUpdateStarted += LogPublishedDate;
// Build a new Pipeline to use an on-premise Hash engine and
// configure automatic updates.
pipeline = new DeviceDetectionPipelineBuilder(loggerFactory, httpClient, dataUpdateService)
// Use the On-Premise engine (aka Hash engine) and pass in
// the path to the data file, your license key and whether
// to use a temporary file.
// A license key is required otherwise automatic updates will
// remain disabled.
.UseOnPremise(dataFile, licenseKey, true)
// Enable automatic updates.
.SetAutoUpdate(true)
// Watch the data file on disk and refresh the engine
// as soon as that file is updated.
.SetDataFileSystemWatcher(true)
// Disable update on startup
.SetDataUpdateOnStartUp(false)
// Set the frequency in seconds that the pipeline should
// check for updates to data files. A recommended
// polling interval in a production environment is
// around 30 minutes or 1800 seconds.
.SetUpdatePollingInterval(30)
// Set the max ammount of time in seconds that should be
// added to the polling interval. This is useful in datacenter
// applications where mulitple instances may be polling for
// updates at the same time. A recommended ammount in production
// environments is 600 seconds.
.SetUpdateRandomisationMax(10)
.Build();
// Get the published date of the data file from the Hash engine
// after building the pipeline.
var publishedDate = pipeline
.GetElement <DeviceDetectionHashEngine>()
.DataFiles
.Single()
.DataPublishedDateTime;
Console.WriteLine($"Initial data file published date: {publishedDate}");
Console.WriteLine($"The pipeline has now been set up to poll for updates every {updatePollingInterval} seconds, " +
$"a random ammount of time up to {pollingIntervalRandomisation} seconds will be added.");
// Wait for the update complete event.
ewh.WaitOne();
}
