public static void Run(
[
EventHubTrigger("lowstockeventhub",
Connection = "receiverConnectionString")
]
EventData[] eventHubMessages, ILogger log)
{
foreach (var message in eventHubMessages)
{
string messagePayload = Encoding.UTF8.GetString(message.Body.Array);
LowStockRequest ticketRequestMessage = JsonConvert.DeserializeObject <LowStockRequest>(messagePayload);
log.LogWarning($" !!!!! Low Stock Alert !!!! \n\t DeviceID - {ticketRequestMessage.DeviceId} " +
$"\n\t Time - {ticketRequestMessage.CreateTime}" +
$"\n\t Current Stock Level - {ticketRequestMessage.StockLevel}");
}
}
private bool SendTLowStockMessageToCloud()
{
LowStockRequest lowStockNotification = new LowStockRequest()
{
DeviceId = this.deviceId,
DeviceType = this.deviceType,
StockLevel = this.TicketStockCount,
CreateTime = System.DateTime.UtcNow
};
var messageString = JsonConvert.SerializeObject(lowStockNotification);
SendMessageToCloud(messageString);
this.LowStockNotificationSent = true;
Console.WriteLine("{0} > Sending message: {1}", DateTime.Now, messageString);
Console.WriteLine();
return(false); // don't restart timer
}
public static void Run(
[
EventHubTrigger("%noactionneededEventhubName%",
Connection = "receiverConnectionString")
]
EventData[] eventHubMessages, ILogger log)
{
foreach (var message in eventHubMessages)
{
string messagePayload = Encoding.UTF8.GetString(message.Body.Array);
// note, this approaches parses the JSON twice, which isn't very efficient but does help
// demonstrate what we're trying to accomplish
var obj = JObject.Parse(messagePayload); // get a dynamic object based on the msg payload
string msgType = (string)obj["MessageType"];
if (message.Properties.ContainsKey("opType") && (message.Properties["opType"].ToString() == "updateTwin"))
{
log.LogInformation($" Device Twin update event.");
string deviceId = message.Properties["deviceId"].ToString();
// are there desired properties present?
if (obj["properties"]["reported"] != null)
{
if (obj["properties"]["reported"]["GateDirection"] != null)
{
string reportedGateDirection = obj["properties"]["reported"]["GateDirection"].ToString();
log.LogInformation($" Gate Direction on Device {deviceId} reported change to {reportedGateDirection}.");
}
if (obj["properties"]["reported"]["status"] != null)
{
log.LogInformation($" Desired Status of Device {deviceId} reported as {obj["properties"]["reported"]["status"].ToString()}.");
}
}
else if (obj["properties"]["desired"] != null)
{
if (obj["properties"]["desired"]["status"] != null)
{
log.LogInformation($" Desired Status of Device {deviceId} set to {obj["properties"]["desired"]["status"].ToString()}.");
}
}
}
else
{
switch (msgType)
{
case MessageType.eventLowStock:
// parse a low stock message
LowStockRequest lowStockMsg = JsonConvert.DeserializeObject <LowStockRequest>(messagePayload);
log.LogWarning($" !!!!! Low Stock Alert !!!! \n\t DeviceID - {lowStockMsg.DeviceId} " +
$"\n\t Time - {lowStockMsg.CreateTime}" +
$"\n\t Current Stock Level - {lowStockMsg.StockLevel}");
break;
case MessageType.eventTicketIssued:
// parse a ticket issued event
IssueTicketRequest ticketIssued = JsonConvert.DeserializeObject <IssueTicketRequest>(messagePayload);
log.LogInformation($" Ticket Issued by device {ticketIssued.DeviceId} ");
break;
case MessageType.eventGateOpened:
// parse a GateOpened
GateOpenedNotification gateOpenedMsg = JsonConvert.DeserializeObject <GateOpenedNotification>(messagePayload);
log.LogInformation($" Gate Opened on Device {gateOpenedMsg.DeviceId} ");
break;
default:
log.LogError($" Unknown message recieved !!!! \n\t {messagePayload} ");
break;
}
}
}
}
public void TestLowStock()
{
FakeDeviceClient fakeDeviceClient = new FakeDeviceClient();
FakeEventScheduler fakeScheduler = new FakeEventScheduler();
TestContext.WriteLine(">> Testing the Kiosk Device's Low Stock notification..");
PurchaseTicketPayload approvePurchaseMethodkRequest = new PurchaseTicketPayload()
{
DeviceId = deviceconfig.DeviceId,
DeviceType = deviceconfig.DeviceType,
MessageType = MessageType.cmdPurchaseTicket,
IsApproved = true
};
// create our test device
KioskDevice device = new KioskDevice(deviceconfig, fakeDeviceClient, fakeScheduler);
device.InitializeAsync().Wait();
TestContext.WriteLine(string.Empty);
TestContext.WriteLine(">> Purchasing tickets, shouldn't throw event");
string requestString = JsonConvert.SerializeObject(approvePurchaseMethodkRequest);
MethodRequest methodRequest = new MethodRequest("ReceivePurchaseTicketResponse", Encoding.UTF8.GetBytes(requestString));
// fire events to bring the count down to right at threshold
for (long count = this.deviceconfig.InitialStockCount; count > this.deviceconfig.LowStockThreshold; count--)
{
MethodResponse myresult = fakeDeviceClient.directMethods[0](methodRequest, null).Result;
TestContext.WriteLine(">> Current stock level: " + device.CurrentStockLevel);
}
// now that we're at the threshold, lets clear all previous events
fakeDeviceClient.sendMessageLog.Clear(); // clear out all messages to this point
TestContext.WriteLine(string.Empty);
TestContext.WriteLine(">> Purchasing 1 more ticket. Should send low stock notification");
// purchase one more ticket.
MethodResponse methodresult = fakeDeviceClient.directMethods[0](methodRequest, null).Result;
// we expect 2 messages to have been sent
Assert.AreEqual(fakeDeviceClient.sendMessageLog.Count, 2);
// second message should make expected result
LowStockRequest expectedRequest = new LowStockRequest()
{
DeviceId = deviceconfig.DeviceId,
DeviceType = deviceconfig.DeviceType,
StockLevel = (deviceconfig.LowStockThreshold - 1),
};
// get actual message into an object so we can compare it
LowStockRequest actualRequest = JsonConvert.DeserializeObject <LowStockRequest>(fakeDeviceClient.sendMessageLog[1]);
TestContext.WriteLine(fakeDeviceClient.sendMessageLog[1]);
// compare properties to make sure they're valid.
Assert.AreEqual(actualRequest.DeviceId, expectedRequest.DeviceId);
Assert.AreEqual(actualRequest.DeviceType, expectedRequest.DeviceType);
Assert.AreEqual(actualRequest.MessageType, expectedRequest.MessageType);
Assert.AreEqual(actualRequest.StockLevel, expectedRequest.StockLevel);
TestContext.WriteLine(string.Empty);
TestContext.WriteLine(">> Testing to make sure we don't have a second low stock warning ..");
// make sure we don't throw the low stock warning again
fakeDeviceClient.sendMessageLog.Clear(); // clear out all messages to this point
// purchase one more ticket.
methodresult = fakeDeviceClient.directMethods[0](methodRequest, null).Result;
// we expect 2 messages to have been sent
Assert.AreEqual(fakeDeviceClient.sendMessageLog.Count, 1);
// reset the device to make sure ticket stock is reset using the desired property callback option
device.SetDeviceStatusAsync(DeviceStatus.disabled).Wait(); // disable the device
device.SetDeviceStatusAsync(DeviceStatus.enabled).Wait(); // enable the device
// check the stock level
Assert.AreEqual(deviceconfig.InitialStockCount, device.CurrentStockLevel, "Device stock levels were not reset back to initial after device rest");
}
