public async Task ObservableEventBatchIsPublishable()
{
await using var scope = await EventHubScope.CreateAsync(1);
await using var producer = new EventHubProducerClient(EventHubsTestEnvironment.Instance.EventHubsConnectionString, scope.EventHubName);
using var eventBatch = await producer.CreateBatchAsync();
var observableBatch = new ObservableEventDataBatch(eventBatch);
// Adding events to the batch
for (var index = 0; index < 5; ++index)
{
var eventData = new EventData($"Event #{ index }");
eventData.Properties.Add("ApplicationId", index);
if (!observableBatch.TryAdd(eventData))
{
throw new Exception($"The event at { index } could not be added.");
}
}
var contains = observableBatch.Events.Any(eventData => int.TryParse(eventData.Properties["ApplicationId"].ToString(), out var id) && id == 1);
Assert.That(contains, Is.True, "The batch should contain the event with the expected application identifier.");
Assert.That(observableBatch.Count, Is.GreaterThan(0), "Events were not successfully added to the batch");
Assert.That(observableBatch.Count, Is.EqualTo(observableBatch.Events.Count), "The observable batch events are out of sync with the event batch data");
// Check implicit casting by verifying batch can be sent using built in
// producer method
await producer.SendAsync(observableBatch);
}
public async Task Sample09_CheckingBatch()
{
await using var scope = await EventHubScope.CreateAsync(1);
#region Snippet:Sample09_CheckingBatch
#if SNIPPET
var connectionString = "<< CONNECTION STRING FOR THE EVENT HUBS NAMESPACE >>";
var eventHubName = "<< NAME OF THE EVENT HUB >>";
#else
var connectionString = EventHubsTestEnvironment.Instance.EventHubsConnectionString;
var eventHubName = scope.EventHubName;
#endif
var producer = new EventHubProducerClient(connectionString, eventHubName);
try
{
using var eventBatch = await producer.CreateBatchAsync();
var observableBatch = new ObservableEventDataBatch(eventBatch);
// Attempt to add events to the batch.
for (var index = 0; index < 5; ++index)
{
var eventData = new EventData($"Event #{ index }")
{
MessageId = index.ToString()
};
if (!observableBatch.TryAdd(eventData))
{
throw new Exception($"The event at { index } could not be added.");
}
}
// The "Events" collection can be used to validate that a specific event
// is in the batch. In this example, we'll ensure that an event with
// id "1" was added.
var contains = observableBatch.Events
.Any(eventData => eventData.MessageId == "1");
}
finally
{
await producer.CloseAsync();
}
#endregion
}
public async Task Sample09_AccessingEventData()
{
await using var scope = await EventHubScope.CreateAsync(1);
#region Snippet:Sample09_AccessingEventData
#if SNIPPET
var connectionString = "<< CONNECTION STRING FOR THE EVENT HUBS NAMESPACE >>";
var eventHubName = "<< NAME OF THE EVENT HUB >>";
#else
var connectionString = EventHubsTestEnvironment.Instance.EventHubsConnectionString;
var eventHubName = scope.EventHubName;
#endif
var producer = new EventHubProducerClient(connectionString, eventHubName);
try
{
using var eventBatch = await producer.CreateBatchAsync();
var observableBatch = new ObservableEventDataBatch(eventBatch);
// Attempt to add events to the batch.
for (var index = 0; index < 5; ++index)
{
var eventData = new EventData($"Event #{ index }");
if (!observableBatch.TryAdd(eventData))
{
throw new Exception($"The event at { index } could not be added.");
}
}
// Events in the batch can be inspected using the "Events" collection.
foreach (var singleEvent in observableBatch.Events)
{
Debug.WriteLine($"Added event { singleEvent.EventBody } at time { singleEvent.EnqueuedTime }");
}
await producer.SendAsync(observableBatch);
}
finally
{
await producer.CloseAsync();
}
#endregion
}
public async Task Sample09_CheckingBatch()
{
await using var scope = await EventHubScope.CreateAsync(1);
#region Snippet:Sample09_CheckingBatch
#if SNIPPET
var connectionString = "<< CONNECTION STRING FOR THE EVENT HUBS NAMESPACE >>";
var eventHubName = "<< NAME OF THE EVENT HUB >>";
#else
var connectionString = EventHubsTestEnvironment.Instance.EventHubsConnectionString;
var eventHubName = scope.EventHubName;
#endif
var producer = new EventHubProducerClient(connectionString, eventHubName);
try
{
using var eventBatch = await producer.CreateBatchAsync();
var newBatch = new ObservableEventDataBatch(eventBatch);
// Adding events to the batch
for (var index = 0; index < 5; ++index)
{
var eventBody = new BinaryData($"Event #{ index }");
var eventData = new EventData(eventBody);
eventData.Properties.Add("ApplicationId", index);
if (!newBatch.TryAdd(eventData))
{
throw new Exception($"The event at { index } could not be added.");
}
}
// Verify that the expected event is in the batch
var contains = newBatch.Events.Any(eventData => int.TryParse(eventData.Properties["ApplicationId"].ToString(), out var id) && id == 1);
}
finally
{
await producer.CloseAsync();
}
#endregion
}