///<inheritdoc/>
public override async Task PublishAsync <TIntegrationEvent>(
TIntegrationEvent @event,
string topic = null,
string prefix = null)
{
if (@event is null)
{
throw new ArgumentNullException(nameof(@event));
}
var topicName = GetTopicName(@event.GetType(), topic, prefix);
if (_daprEventBusSchemaOptions.Value.UseSchemaRegistry)
{
// Get schema
var schema = await _schemaRegistry.GetSchema(topicName);
if (schema == null)
{
if (!_daprEventBusSchemaOptions.Value.AddSchemaOnPublish)
{
_logger.LogError("No schema registered for {TopicName}", topicName);
throw new SchemaNotRegisteredException(topicName);
}
// Generate schema
var content = _schemaGenerator.GenerateSchema(typeof(TIntegrationEvent));
if (string.IsNullOrWhiteSpace(content))
{
_logger.LogError("Schema generation failed for {TopicName}", topicName);
throw new Exception($"Schema generation failed for {topicName}");
}
// Register schema
schema = new Schema
{
Topic = topicName,
Content = content
};
await _schemaRegistry.AddSchema(schema);
_logger.LogInformation("Schema registered for {TopicName}", topicName);
}
// Validate message with schema
var message = JsonSerializer.Serialize(@event, typeof(TIntegrationEvent), DaprClient.JsonSerializerOptions);
var isValid = _schemaValidator.ValidateMessage(message, schema.Content, out var errorMessages);
if (!isValid)
{
_logger.LogError("Schema validation failed for {TopicName}", topicName);
foreach (var errorMessage in errorMessages)
{
_logger.LogError("Schema validation error: {ErrorMessage}", errorMessage);
}
throw new SchemaValidationException(topicName);
}
}
await DaprClient.PublishEventAsync(DaprEventBusOptions.Value.PubSubName, topicName, @event);
}
public async Task <IActionResult> AddSchema([FromRoute] string topic, [FromBody] JsonElement element)
{
var content = element.ToString();
var schema = new Schema
{
Topic = topic,
Content = content
};
var result = await _schemaRegistry.AddSchema(schema);
return(!result?BadRequest() : CreatedAtAction(nameof(GetSchema),
new { topic }, schema));
}