private Func <BusinessData <TBusinessData> > GetCurrentBusinessData <TBusinessData, TBusinessDataUpdate>(
Func <TBusinessData> createEmptyBusinessData,
Func <TBusinessData, TBusinessDataUpdate, TBusinessData> applyUpdate)
{
var businessDataUpdates = new BusinessDataPump <TBusinessData, TBusinessDataUpdate>(
demoCredential: this.demoCredential,
createEmptyBusinessData: createEmptyBusinessData,
applyUpdate: applyUpdate,
snapshotContainerClient: this.snapshotContainerClient);
businessDataUpdates.StartUpdateProcess().Wait();
return(() => businessDataUpdates.BusinessData);
}
internal Func <BusinessData <TBusinessData> > GetCurrentBusinessData <TBusinessData, TBusinessDataUpdate>(
Func <TBusinessData> createEmptyBusinessData,
Func <TBusinessData, TBusinessDataUpdate, TBusinessData> applyUpdate)
{
var businessDataUpdates = new BusinessDataPump <TBusinessData, TBusinessDataUpdate>(
demoCredential: this.demoCredential,
createEmptyBusinessData: createEmptyBusinessData,
applyUpdate: applyUpdate,
snapshotContainerClient: new BlobContainerClient(
blobContainerUri: new Uri($"https://{this.demoCredential.BusinessDataSnapshotAccountName}.blob.core.windows.net/{this.demoCredential.BusinessDataSnapshotContainerName}/"),
credential: this.demoCredential.AADServicePrincipal));
businessDataUpdates.StartUpdateProcess().Wait();
return(() => businessDataUpdates.BusinessData);
}
// This demo shows how you can consume business data.
private static async Task Main(string[] args)
{
Console.Title = "Business Data User";
IDistributedSearchConfiguration demoCredential = new DemoCredential();
var cts = new CancellationTokenSource();
var businessDataPump = new BusinessDataPump <FashionBusinessData, FashionBusinessDataUpdate>(
demoCredential: demoCredential,
createEmptyBusinessData: newFashionBusinessData,
applyUpdate: FashionBusinessDataExtensions.ApplyFashionUpdate,
snapshotContainerClient: new BlobContainerClient(
blobContainerUri: new Uri($"https://{demoCredential.BusinessDataSnapshotAccountName}.blob.core.windows.net/{demoCredential.BusinessDataSnapshotContainerName}/"),
credential: demoCredential.AADServicePrincipal));
Func <BusinessData <FashionBusinessData>, string> bdToStr = bd => string.Join(" ",
bd.Data.Markup.Select(kvp => $"{kvp.Key}={kvp.Value}").ToArray());
bool demoObservable = true;
if (demoObservable)
{
// This code observes business data changes and only prints when there have been changes.
// One line oer change, only when something changes.
var businessDataObservable = await businessDataPump.CreateObservable(cts.Token);
businessDataObservable.Subscribe(onNext: async bd =>
{
await Console.Out.WriteLineAsync(bdToStr(bd));
}, token: cts.Token);
_ = await Console.In.ReadLineAsync();
cts.Cancel();
}
else
{
// This code runs in an endless loop, and prints the business data (regardless whether it changed or not)
// Prints out the same message, if there are no changes.
await businessDataPump.StartUpdateProcess(cts.Token);
while (true)
{
await Console.Out.WriteLineAsync(bdToStr(businessDataPump.BusinessData));
}
}
}
private static async Task Main()
{
Console.Title = "Update Configuration";
IDistributedSearchConfiguration demoCredential = new DemoCredential();
var businessDataUpdates = new BusinessDataPump <FashionBusinessData, FashionBusinessDataUpdate>(
demoCredential: demoCredential,
createEmptyBusinessData: newFashionBusinessData,
applyUpdate: FashionBusinessDataExtensions.ApplyFashionUpdate,
snapshotContainerClient: new BlobContainerClient(
blobContainerUri: new Uri($"https://{demoCredential.BusinessDataSnapshotAccountName}.blob.core.windows.net/{demoCredential.BusinessDataSnapshotContainerName}/"),
credential: demoCredential.AADServicePrincipal));
while (true)
{
await Console.Out.WriteAsync($"Please enter an item and a price, separated by a space: ");
var input = await Console.In.ReadLineAsync();
var values = input.Split(" ");
if (values.Length != 2)
{
continue;
}
var item = values[0];
if (!decimal.TryParse(values[1], out var newMarkup))
{
continue;
}
var update = FashionBusinessDataUpdate.NewMarkupUpdate(
fashionType: item,
markupPrice: newMarkup);
// Here, we're directly dropping the update in Kafka.
// This must be replaced with a secured HTTP request.
var watermark = await businessDataUpdates.SendUpdate(update);
await Console.Out.WriteLineAsync($"Update sent for {newMarkup} (#{watermark.Item})");
}
}
private static async Task Main()
{
Console.Title = "Snapshot Generator Service";
IDistributedSearchConfiguration demoCredential = new DemoCredential();
var businessDataPump = new BusinessDataPump <FashionBusinessData, FashionBusinessDataUpdate>(
demoCredential: demoCredential,
createEmptyBusinessData: newFashionBusinessData,
applyUpdate: FashionBusinessDataExtensions.ApplyFashionUpdate,
snapshotContainerClient: new BlobContainerClient(
blobContainerUri: new Uri($"https://{demoCredential.BusinessDataSnapshotAccountName}.blob.core.windows.net/{demoCredential.BusinessDataSnapshotContainerName}/"),
credential: demoCredential.AADServicePrincipal));
var cts = new CancellationTokenSource();
IObservable <BusinessData <FashionBusinessData> > businessDataObservable = await businessDataPump.CreateObservable(cts.Token);
businessDataObservable
.Sample(interval: TimeSpan.FromSeconds(5))
.Subscribe(
onNext: async bd =>
{
await Console.Out.WriteLineAsync($"{bd.AsJSON()}");
var snapshotName = await businessDataPump.WriteBusinessDataSnapshot(bd);
await Console.Out.WriteLineAsync($"wrote snapshot {snapshotName}");
},
onError: ex => Console.Error.WriteLine($"ERROR: {ex.Message}"),
onCompleted: () => Console.Out.WriteLine($"Completed"),
token: cts.Token);
await Console.Out.WriteAsync("Press <return> to stop snapshot generation");
_ = await Console.In.ReadLineAsync();
cts.Cancel();
}
public BusinessDataUpdateController(BusinessDataPump <FashionBusinessData, FashionBusinessDataUpdate> businessDataProvider)
{
this.businessDataProvider = businessDataProvider;
}
