/// <summary>
/// Given JSON-encoded events, parses the event envelope and returns an array of EventGridEvents.
/// </summary>
/// <param name="requestContent"> The JSON-encoded representation of either a single event or an array or events, encoded in the EventGridEvent schema. </param>
/// <returns> A list of <see cref="EventGridEvent"/>. </returns>
public static EventGridEvent[] Parse(string requestContent)
{
List <EventGridEventInternal> egEventsInternal = new List <EventGridEventInternal>();
List <EventGridEvent> egEvents = new List <EventGridEvent>();
JsonDocument requestDocument = JsonDocument.Parse(requestContent);
// Parse JsonElement into separate events, deserialize event envelope properties
if (requestDocument.RootElement.ValueKind == JsonValueKind.Object)
{
egEventsInternal.Add(EventGridEventInternal.DeserializeEventGridEventInternal(requestDocument.RootElement));
}
else if (requestDocument.RootElement.ValueKind == JsonValueKind.Array)
{
foreach (JsonElement property in requestDocument.RootElement.EnumerateArray())
{
egEventsInternal.Add(EventGridEventInternal.DeserializeEventGridEventInternal(property));
}
}
foreach (EventGridEventInternal egEventInternal in egEventsInternal)
{
egEvents.Add(new EventGridEvent(egEventInternal));
}
return(egEvents.ToArray());
}
/// <summary> Publishes a batch of EventGridEvents to an Azure Event Grid topic. </summary>
/// <param name="events"> An array of events to be published to Event Grid. </param>
/// <param name="async">Whether to invoke the operation asynchronously.</param>
/// <param name="cancellationToken"> The cancellation token to use. </param>
private async Task <Response> PublishEventsInternal(IEnumerable <EventGridEvent> events, bool async, CancellationToken cancellationToken = default)
{
using DiagnosticScope scope = _clientDiagnostics.CreateScope($"{nameof(EventGridPublisherClient)}.{nameof(SendEvents)}");
scope.Start();
try
{
// List of events cannot be null
Argument.AssertNotNull(events, nameof(events));
List <EventGridEventInternal> eventsWithSerializedPayloads = new List <EventGridEventInternal>();
foreach (EventGridEvent egEvent in events)
{
// Individual events cannot be null
Argument.AssertNotNull(egEvent, nameof(egEvent));
MemoryStream stream = new MemoryStream();
_dataSerializer.Serialize(stream, egEvent.Data, egEvent.Data.GetType(), cancellationToken);
stream.Position = 0;
JsonDocument data = JsonDocument.Parse(stream);
EventGridEventInternal newEGEvent = new EventGridEventInternal(
egEvent.Id,
egEvent.Subject,
data.RootElement,
egEvent.EventType,
egEvent.EventTime,
egEvent.DataVersion)
{
Topic = egEvent.Topic
};
eventsWithSerializedPayloads.Add(newEGEvent);
}
if (async)
{
// Publish asynchronously if called via an async path
return(await _serviceRestClient.PublishEventsAsync(
_hostName,
eventsWithSerializedPayloads,
cancellationToken).ConfigureAwait(false));
}
else
{
return(_serviceRestClient.PublishEvents(
_hostName,
eventsWithSerializedPayloads,
cancellationToken));
}
}
catch (Exception e)
{
scope.Failed(e);
throw;
}
}
/// <summary>
/// Given a single JSON-encoded event, parses the event envelope and returns an EventGridEvent.
/// </summary>
/// <param name="binaryData"> Specifies the instance of <see cref="BinaryData"/>. </param>
/// <returns> An <see cref="EventGridEvent"/>. </returns>
public static EventGridEvent ToEventGridEvent(this BinaryData binaryData)
{
// Deserialize JsonElement to single event, parse event envelope properties
JsonDocument requestDocument = JsonDocument.Parse(binaryData.ToMemory());
EventGridEventInternal egEventInternal = EventGridEventInternal.DeserializeEventGridEventInternal(requestDocument.RootElement);
EventGridEvent egEvent = new EventGridEvent(egEventInternal);
return(egEvent);
}
internal EventGridEvent(EventGridEventInternal eventGridEventInternal)
{
Argument.AssertNotNull(eventGridEventInternal.Subject, nameof(eventGridEventInternal.Subject));
Argument.AssertNotNull(eventGridEventInternal.EventType, nameof(eventGridEventInternal.EventType));
Argument.AssertNotNull(eventGridEventInternal.DataVersion, nameof(eventGridEventInternal.DataVersion));
Argument.AssertNotNull(eventGridEventInternal.Id, nameof(eventGridEventInternal.Id));
Subject = eventGridEventInternal.Subject;
EventType = eventGridEventInternal.EventType;
DataVersion = eventGridEventInternal.DataVersion;
EventTime = eventGridEventInternal.EventTime;
Id = eventGridEventInternal.Id;
Topic = eventGridEventInternal.Topic;
Data = new BinaryData(eventGridEventInternal.Data);
}
/// <inheritdoc cref="JsonConverter{EventGridEvent}.Write(Utf8JsonWriter, EventGridEvent, JsonSerializerOptions)"/>
public override void Write(Utf8JsonWriter writer, EventGridEvent value, JsonSerializerOptions options)
{
JsonDocument data = JsonDocument.Parse(value.Data.ToStream());
var eventGridEventInternal = new EventGridEventInternal(
value.Id,
value.Subject,
data.RootElement,
value.EventType,
value.EventTime,
value.DataVersion)
{
Topic = value.Topic
};
((IUtf8JsonSerializable)eventGridEventInternal).Write(writer);
}
/// <summary>
/// Given a single JSON-encoded event, parses the event envelope and returns an EventGridEvent.
/// </summary>
/// <param name="binaryData"> Specifies the instance of <see cref="BinaryData"/>. </param>
/// <returns> An <see cref="EventGridEvent"/>. </returns>
public static EventGridEvent ToEventGridEvent(this BinaryData binaryData)
{
// Deserialize JsonElement to single event, parse event envelope properties
JsonDocument requestDocument = JsonDocument.Parse(binaryData.ToBytes());
EventGridEventInternal egEventInternal = EventGridEventInternal.DeserializeEventGridEventInternal(requestDocument.RootElement);
EventGridEvent egEvent = new EventGridEvent(
egEventInternal.Data,
egEventInternal.Subject,
egEventInternal.EventType,
egEventInternal.DataVersion,
egEventInternal.EventTime,
egEventInternal.Id);
return(egEvent);
}
/// <summary>
/// Given a single JSON-encoded event, parses the event envelope and returns an EventGridEvent.
/// </summary>
/// <param name="binaryData"> Specifies the instance of <see cref="BinaryData"/>. </param>
/// <returns> An <see cref="EventGridEvent"/>. </returns>
public static EventGridEvent ToEventGridEvent(this BinaryData binaryData)
{
// Deserialize JsonElement to single event, parse event envelope properties
JsonDocument requestDocument = JsonDocument.Parse(binaryData.Bytes);
EventGridEventInternal egEventInternal = EventGridEventInternal.DeserializeEventGridEventInternal(requestDocument.RootElement);
EventGridEvent egEvent = new EventGridEvent()
{
Subject = egEventInternal.Subject,
EventType = egEventInternal.EventType,
DataVersion = egEventInternal.DataVersion,
Id = egEventInternal.Id,
EventTime = egEventInternal.EventTime,
SerializedData = egEventInternal.Data
};
return(egEvent);
}
/// <summary>
/// Given JSON-encoded events, parses the event envelope and returns an array of EventGridEvents.
/// If the content is not valid JSON, or events are missing required properties, an exception is thrown.
/// </summary>
/// <param name="json">An instance of <see cref="BinaryData"/> containing the JSON for one or more EventGridEvents.</param>
/// <returns> An array of <see cref="EventGridEvent"/> instances.</returns>
public static EventGridEvent[] ParseMany(BinaryData json)
{
Argument.AssertNotNull(json, nameof(json));
EventGridEvent[] egEvents = null;
using JsonDocument requestDocument = JsonDocument.Parse(json);
// Parse JsonElement into separate events, deserialize event envelope properties
if (requestDocument.RootElement.ValueKind == JsonValueKind.Object)
{
egEvents = new EventGridEvent[1];
egEvents[0] = (new EventGridEvent(EventGridEventInternal.DeserializeEventGridEventInternal(requestDocument.RootElement)));
}
else if (requestDocument.RootElement.ValueKind == JsonValueKind.Array)
{
egEvents = new EventGridEvent[requestDocument.RootElement.GetArrayLength()];
int i = 0;
foreach (JsonElement property in requestDocument.RootElement.EnumerateArray())
{
egEvents[i++] = new EventGridEvent(EventGridEventInternal.DeserializeEventGridEventInternal(property));
}
}
return(egEvents ?? Array.Empty <EventGridEvent>());
}
private static List <EventGridEvent> DeserializeRequest(Request request)
{
var content = request.Content;
var stream = new MemoryStream();
content.WriteTo(stream, CancellationToken.None);
stream.Position = 0;
JsonDocument requestDocument = JsonDocument.Parse(stream);
var egEvents = new List <EventGridEvent>();
// Parse JsonElement into separate events, deserialize event envelope properties
if (requestDocument.RootElement.ValueKind == JsonValueKind.Object)
{
egEvents.Add(new EventGridEvent(EventGridEventInternal.DeserializeEventGridEventInternal(requestDocument.RootElement)));
}
else if (requestDocument.RootElement.ValueKind == JsonValueKind.Array)
{
foreach (JsonElement property in requestDocument.RootElement.EnumerateArray())
{
egEvents.Add(new EventGridEvent(EventGridEventInternal.DeserializeEventGridEventInternal(property)));
}
}
return(egEvents);
}
/// <summary>
/// Gets or sets the serializer to use for the data portion of the <see cref="EventGridEvent"/>. If not specified,
/// JsonObjectSerializer is used.
/// </summary>
/// <inheritdoc cref="JsonConverter{EventGridEvent}.Read(ref Utf8JsonReader, Type, JsonSerializerOptions)"/>
public override EventGridEvent Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
JsonDocument requestDocument = JsonDocument.ParseValue(ref reader);
return(new EventGridEvent(EventGridEventInternal.DeserializeEventGridEventInternal(requestDocument.RootElement)));
}
private async Task <EventGridEvent[]> DeserializeEventGridEventsInternal(string requestContent, bool async, CancellationToken cancellationToken = default)
{
List <EventGridEventInternal> egInternalEvents = new List <EventGridEventInternal>();
List <EventGridEvent> egEvents = new List <EventGridEvent>();
// Deserialize raw JSON string into separate events, deserialize event envelope properties
JsonDocument requestDocument = await ParseJsonToDocument(requestContent, async, cancellationToken).ConfigureAwait(false);
foreach (JsonElement property in requestDocument.RootElement.EnumerateArray())
{
egInternalEvents.Add(EventGridEventInternal.DeserializeEventGridEventInternal(property));
}
// Deserialize 'Data' property from JsonElement for each event
foreach (EventGridEventInternal egEventInternal in egInternalEvents)
{
JsonElement dataElement = egEventInternal.Data;
object egEventData = null;
// Reserialize JsonElement to stream
MemoryStream dataStream = SerializePayloadToStream(dataElement, cancellationToken);
// First, let's attempt to find the mapping for the event type in the custom event mapping.
if (_customEventTypeMappings.TryGetValue(egEventInternal.EventType, out Type typeOfEventData))
{
if (!TryGetPrimitiveFromJsonElement(dataElement, out egEventData))
{
if (async)
{
egEventData = await _dataSerializer.DeserializeAsync(dataStream, typeOfEventData, cancellationToken).ConfigureAwait(false);
}
else
{
egEventData = _dataSerializer.Deserialize(dataStream, typeOfEventData, cancellationToken);
}
}
}
// If a custom mapping doesn't exist, let's attempt to find the mapping for the deserialization function in the system event type mapping.
else if (SystemEventTypeMappings.SystemEventDeserializers.TryGetValue(egEventInternal.EventType, out Func <JsonElement, object> systemDeserializationFunction))
{
egEventData = systemDeserializationFunction(dataElement);
}
else
{
// If event data is not a primitive/string, return as BinaryData
if (!TryGetPrimitiveFromJsonElement(dataElement, out egEventData))
{
egEventData = BinaryData.FromStream(dataStream);
}
}
egEvents.Add(new EventGridEvent(
egEventInternal.Subject,
egEventData,
egEventInternal.EventType,
egEventInternal.DataVersion)
{
Id = egEventInternal.Id,
EventTime = egEventInternal.EventTime
});
}
return(egEvents.ToArray());
}
