PetShop4也有小BUG，哈哈

在namespace PetShop.OrderProcessor.Program 的代码中：

 1 // the transaction timeout should be long enough to handle all of orders in the batch
 2            TimeSpan tsTimeout = TimeSpan.FromSeconds(Convert.ToDouble(transactionTimeout * batchSize));
 3
 4            Order order = new Order();
 5            while (true) {
 6
 7                // queue timeout variables
 8                TimeSpan datetimeStarting = new TimeSpan(DateTime.Now.Ticks);
 9                double elapsedTime = 0;
10
11                int processedItems = 0;
12
13                ArrayList queueOrders = new ArrayList();
14
15                //OrderInfo orderData = orderQueue.Receive(timeout);
16                using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, tsTimeout)) {
17                   // Console.WriteLine("begin.at:" + DateTime.Now.ToString());
18                    // Receive the orders from the queue
19                    for (int j = 0; j < batchSize; j++) {
20                       // Console.WriteLine("从消息队列中取数据.at:" + DateTime.Now.ToString());
21
22                        try {
23                            //only receive more queued orders if there is enough time
24                            if ((elapsedTime + queueTimeout + transactionTimeout) < tsTimeout.TotalSeconds) {
25                                //Console.WriteLine(string.Format("从消息队列中取数据.at:{0},{1},{2},{3},{4}", DateTime.Now.ToString(), elapsedTime, queueTimeout, transactionTimeout, tsTimeout.TotalSeconds));
26                                queueOrders.Add(order.ReceiveFromQueue(queueTimeout));
27                                
28                            }
29                            else {
30                                j = batchSize;   // exit loop
31                            }
32
33                            //update elapsed time
34                            elapsedTime = new TimeSpan(DateTime.Now.Ticks).TotalSeconds - datetimeStarting.TotalSeconds;
35                        }
36                        catch (TimeoutException) {
37
38                            //exit loop because no more messages are waiting
39                            j = batchSize;
40                            //Console.WriteLine("TimeoutException.at:" + DateTime.Now.ToString());
41                        }
42                    }
43                   // Console.WriteLine("从消息队列中取数据Over.at:" + DateTime.Now.ToString());
44
45                    //process the queued orders
46                    for (int k = 0; k < queueOrders.Count; k++) {
47                        order.Insert((OrderInfo)queueOrders[k]);
48                        processedItems++;
49                        totalOrdersProcessed++;
50
51                    } 
52                   // Console.WriteLine("上传数据.at:" + DateTime.Now.ToString());
53
54                    //batch complete or MSMQ receive timed out
55                    ts.Complete();
56                   // Console.WriteLine("Over.at:" + DateTime.Now.ToString());
57                }
58
59                Console.WriteLine("(Thread Id " + Thread.CurrentThread.ManagedThreadId + ") batch finished, " + processedItems + " items, in " + elapsedTime.ToString() + " seconds.at:"+DateTime.Now.ToString());
60            }                      

问题在于第2行：TimeSpan tsTimeout = TimeSpan.FromSeconds(Convert.ToDouble(transactionTimeout * batchSize));
如果在配置文件里设置batchSize=1，那么tsTimeout =transactionTimeout

所以在24行。if ((elapsedTime + queueTimeout + transactionTimeout) < tsTimeout.TotalSeconds) ，这个永远为False.除非queueTimeout为负数