/// <summary>
/// 接入事件，也就是收到对方的调用事件
/// </summary>
/// <param name="event"></param>
public static void Accept(DTObject @event)
{
var key = EventEntry.GetEventKey(@event);
var args = @event.GetObject("args");
var source = EventFactory.GetLocalEvent(key.EventName, args, true);
var queueId = key.EventId;
EventRestorer.UseQueue(queueId, true, (callback) =>
{
EventTrigger.Start(key.EventId, source, true, callback); //我们把调用方指定的事件编号作为本地的事件队列编号
},
(ex) =>
{
//发生了错误就发布出去，通知失败了
EventTrigger.PublishRaiseFailed(AppContext.Identity, key, ex.GetCompleteInfo()); //再恢复
});
}
private static void Reverse(EventQueue queue, EventEntry entry)
{
if (entry.IsEmpty() ||
entry.Status == EventStatus.Reversed)//已回逆的不用回逆，保证幂等性
{
return;
}
var args = entry.GetArgs();
if (entry.IsLocal)
{
ReverseLocalEvent(entry, args);
}
else
{
var identity = queue.GetIdentity();
ReverseRemoteEvent(entry, identity, args);
}
}
/// <summary>
///
/// </summary>
/// <param name="owner"></param>
/// <param name="ownerEntry"></param>
/// <param name="entries"></param>
/// <param name="idCount"></param>
private void FillPreEntries(DomainEvent source, EventEntry sourceEntry, List <EventEntry> entries, ref int idCount)
{
const string argsCode = ""; //条目事件的参数在队列没执行的时候，是空的
foreach (var eventName in source.PreEvents)
{
var local = EventFactory.GetLocalEvent(eventName, DTObject.Empty, false);
if (local == null)
{
idCount++;
var entry = new EventEntry(sourceEntry, idCount, eventName, Guid.NewGuid(), argsCode);
entries.Add(entry);
}
else
{
//将本地事件转为条目
idCount++;
var localEntry = new EventEntry(sourceEntry, idCount, eventName, Guid.NewGuid(), argsCode);
FillPreEntries(local, localEntry, entries, ref idCount);
entries.Add(localEntry);
}
}
}
/// <summary>
/// 根据事件条目获取对应的本地定义的事件
/// </summary>
/// <param name="entry"></param>
/// <returns></returns>
public static DomainEvent GetLocalEvent(EventEntry entry, DTObject args, bool throwError)
{
return(GetLocalEvent(entry.EventName, args, throwError));
}