/// <summary>
/// <see cref="SendApplicationMetadata" /> sends
/// <see cref="applicationMetadataEvent" /> to the Event Hub instance
/// associated with <see cref="eventHubClient" />.
/// </summary>
/// <param name="eventHubClient">
/// <see cref="eventHubClient" /> is the Event Hub client proxy.
/// </param>
/// <param name="applicationMetadataEvent">
/// <see cref="ApplicationMetadataEvent" /> is an event that contains metadata
/// originating from an imaginary up-stream web application.
/// </param>
/// <param name="partitionKey">
/// <see cref="partitionKey" /> is the Event Hub Partition Key that determines
/// the Event Hub Partition to which
/// <see cref="applicationMetadataEvent" /> will be sent.
/// </param>
private static void SendApplicationMetadata(EventHubClient eventHubClient,
ApplicationMetadataEvent applicationMetadataEvent, string partitionKey)
{
var serialisedApplicationMetadata = JsonConvert.SerializeObject(applicationMetadataEvent);
var eventData = new EventData(Encoding.UTF8.GetBytes(serialisedApplicationMetadata))
{
PartitionKey = partitionKey
};
eventHubClient.Send(eventData);
}
/// <summary>
/// <see cref="SendRandomApplicationMetadataEvents" /> sends randomly-generated
/// <see cref="ApplicationMetadataEvent" /> instances to Event Hub.
/// </summary>
private static void SendRandomApplicationMetadataEvents()
{
EventHubClient eventHubClient;
try
{
var eventHubName = ConfigurationManager.AppSettings["EventHubName"];
var eventHubConnectionString = ConfigurationManager.AppSettings["EventHubConnectionString"];
eventHubClient = EventHubClient
.CreateFromConnectionString(eventHubConnectionString, eventHubName);
}
catch (Exception exception)
{
Console.WriteLine("A problem occurred connecting to Event Hub: " + exception);
return;
}
var random = new Random();
var values = Enum.GetValues(typeof(Device));
const int eventCount = 250;
for (var j = 0; j < eventCount; j++)
{
foreach (var partitionKey in _partitionKeys)
{
try
{
var applicationMetadata = new ApplicationMetadataEvent
{
IPAddress = GenerateRandomIPAddress(random),
Time = DateTime.UtcNow,
Device = (Device)values.GetValue(random.Next(1, values.Length))
};
SendApplicationMetadata(eventHubClient, applicationMetadata, partitionKey);
}
catch (Exception exception)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("{0} > Exception: {1}", DateTime.Now, exception.Message);
Console.ResetColor();
}
}
}
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Sent {0} events.", eventCount * _partitionKeys.Count);
Console.ResetColor();
Console.ReadLine();
}
