public static CloudEvent ToCloudEvent(this Message <string, byte[]> message,
ICloudEventFormatter eventFormatter = null, params ICloudEventExtension[] extensions)
{
if (!IsCloudEvent(message))
{
throw new InvalidOperationException();
}
var contentType = ExtractContentType(message);
CloudEvent cloudEvent;
if (!string.IsNullOrEmpty(contentType) &&
contentType.StartsWith(CloudEvent.MediaType, StringComparison.InvariantCultureIgnoreCase))
{
// structured mode
if (eventFormatter == null)
{
if (contentType.EndsWith(JsonEventFormatter.MediaTypeSuffix, StringComparison.InvariantCultureIgnoreCase))
{
eventFormatter = _jsonFormatter;
}
else
{
throw new InvalidOperationException("Not supported CloudEvents media formatter.");
}
}
cloudEvent = _jsonFormatter.DecodeStructuredEvent(message.Value, extensions);
}
else
{
// binary mode
var specVersion = ExtractVersion(message);
cloudEvent = new CloudEvent(specVersion, extensions);
var attributes = cloudEvent.GetAttributes();
var cloudEventHeaders = message.Headers.Where(h => h.Key.StartsWith(KafkaCloudEventMessage.KafkaHeaderPerfix));
foreach (var header in cloudEventHeaders)
{
if (string.Equals(header.Key, SpecVersionKafkaHeader1, StringComparison.InvariantCultureIgnoreCase) ||
string.Equals(header.Key, SpecVersionKafkaHeader2, StringComparison.InvariantCultureIgnoreCase))
{
continue;
}
var attributeName = header.Key.Substring(KafkaCloudEventMessage.KafkaHeaderPerfix.Length);
attributes.Add(attributeName,
eventFormatter.DecodeAttribute(specVersion, attributeName, header.GetValueBytes(), extensions));
}
cloudEvent.DataContentType = contentType != null ? new ContentType(contentType) : null;
cloudEvent.Data = message.Value;
}
InitPartitioningKey(message, cloudEvent);
return(cloudEvent);
}
public static MotorCloudEvent <byte[]> ExtractCloudEvent <T>(this IBasicProperties self,
IApplicationNameService applicationNameService, ICloudEventFormatter cloudEventFormatter,
ReadOnlyMemory <byte> body,
IReadOnlyCollection <ICloudEventExtension> extensions)
{
var specVersion = CloudEventsSpecVersion.V1_0;
var attributes = new Dictionary <string, object>();
IDictionary <string, object> headers = new Dictionary <string, object>();
if (self.IsHeadersPresent() && self.Headers != null)
{
headers = self.Headers;
}
foreach (var header in headers
.Where(t => t.Key.StartsWith(CloudEventPrefix))
.Select(t =>
new KeyValuePair <string, object>(
t.Key.Substring(CloudEventPrefix.Length),
t.Value)))
{
if (string.Equals(header.Key, CloudEventAttributes.DataContentTypeAttributeName(specVersion),
StringComparison.InvariantCultureIgnoreCase) ||
string.Equals(header.Key, CloudEventAttributes.SpecVersionAttributeName(specVersion),
StringComparison.InvariantCultureIgnoreCase))
{
continue;
}
attributes.Add(header.Key, header.Value);
}
if (attributes.Count == 0)
{
return(new MotorCloudEvent <byte[]>(applicationNameService, body.ToArray(), typeof(T).Name,
new Uri("rabbitmq://notset"), extensions: extensions.ToArray()));
}
var cloudEvent = new MotorCloudEvent <byte[]>(applicationNameService, body.ToArray(), extensions);
foreach (var attribute in attributes)
{
cloudEvent.GetAttributes().Add(attribute.Key, cloudEventFormatter.DecodeAttribute(
cloudEvent.SpecVersion, attribute.Key, (byte[])attribute.Value, extensions));
}
return(cloudEvent);
}
