事件存储重复提交异常

本文关键字:提交 异常 存储 事件 | 更新日期: 2023-09-27 17:55:54

更新:我们越来越System.Data.SqlClient.SqlException.消息是:

违反主键约束"PK_Commits"。无法在对象 'dbo 中插入重复键。提交。''r'语句已终止

似乎EventStore正在使用streamid和commitid作为唯一ID。

我们使用事件存储来追加事件,如下所示。

public bool TryAppend(object[] content)
{
    if (content == null)
        throw new ArgumentNullException("content");
    try
    {
        using (var stream = m_storage.OpenStream(m_streamID, 0, int.MaxValue))
        {
            var versionInStore = stream.StreamRevision;
            content.ToList().ForEach(m =>
            {
                var version = ++versionInStore;
                var key = string.Format("{0}-{1:00000000}", m.GetType().Name, version);
                var savedMessage = new SavedRecord(key, version, m);
                stream.Add(new EventMessage { Body = savedMessage });
            });
            stream.CommitChanges(Guid.NewGuid());
        }
        return true;
    }
    catch (Exception e)
    {
        m_logger.LogError(e);
        return false;
    }
}

事件存储的配置如下。我们使用 Sql Serer 2008 作为持久性存储。

return Wireup.Init()
    .LogToOutputWindow()
        .UsingSqlPersistence(m_connectionName)
        .WithDialect(new MsSqlDialect())
        .EnlistInAmbientTransaction() // two-phase commit
    .InitializeStorageEngine()
    .UsingJsonSerialization()
        .Compress()
    .UsingSynchronousDispatchScheduler()
        .DispatchTo(new DelegateMessageDispatcher(DispatchCommit))
    .Build();

任何想法为什么会得到重复提交异常?

谢谢

事件存储重复提交异常

遇到了同样的问题;就我而言,这可能是因为不同的线程同时向具有相同 id 的流中添加了不同的事件。已编写以下代码以便能够重试添加事件:

private void TryAddEvent(IStoreEvents storeEvents, IUserEvent anEvent, Guid streamId)
{
    var isCommitSuccessful = false;
    for (var i = 0; i < 10 && !isCommitSuccessful; i++)
    {
        try
        {
            using (var stream = storeEvents.OpenStream(streamId, 0, int.MaxValue))
            {
                stream.Add(new EventMessage {Body = anEvent});
                if (stream.UncommittedEvents.All(e => e.Body != anEvent))
                {
                    stream.Add(new EventMessage {Body = anEvent});
                }
                stream.CommitChanges(Guid.NewGuid());
            }
            isCommitSuccessful = true;
        }
        catch (Exception ex)
        {
            if (!(ex is SqlException) && !(ex is ConcurrencyException))
            {
                throw;
            }
            using (var stream = storeEvents.OpenStream(streamId, 0, int.MaxValue))
            {
                if (stream.CommittedEvents.Any(e => e.Body == anEvent))
                {
                    isCommitSuccessful = true;
                }
            }
        }
    }
    if (!isCommitSuccessful)
    {
        throw new ConcurrencyException(String.Format("Cannot add {0} to event store", anEvent.GetType()));
    }
}

希望它能有所帮助。