IReadOnlyDictionary <Type, MessageSubscriberAttribute> GetAttributeMapping(Type messageType, string defaultGroupName, int defaultTopicQueueCount)
{
var attributes = new Dictionary <Type, MessageSubscriberAttribute>();
foreach (var type in typeFinder.GetTypesBySpecifiedType(messageType, assemblies))
{
var attribute = type.GetTypeInfo().GetCustomAttribute <MessageSubscriberAttribute>(true);
if (attribute != null)
{
if (string.IsNullOrWhiteSpace(attribute.Topic))
{
throw new Exception($"订阅者主题不能为空。 [SubscriberType = {type}]");
}
if (string.IsNullOrWhiteSpace(attribute.GroupName) && !string.IsNullOrWhiteSpace(defaultGroupName))
{
attribute.GroupName = defaultGroupName;
}
if (attribute.TopicQueueCount <= 0)
{
if (defaultTopicQueueCount <= 0)
{
throw new Exception($"默认主题队列数量小于 1 。");
}
attribute.TopicQueueCount = defaultTopicQueueCount;
}
attributes.Add(type, attribute);
}
}
return(attributes);
}
