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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
}
//
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 variables8
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 queue19
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 time24
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 loop31
}32
33
//update elapsed time34
elapsedTime = new TimeSpan(DateTime.Now.Ticks).TotalSeconds – datetimeStarting.TotalSeconds;35
}36
catch (TimeoutException) {37
38
//exit loop because no more messages are waiting39
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 orders46
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 out55
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
转载于:https://www.cnblogs.com/zhpeng/archive/2008/04/17/1157436.html
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