当您创建带有有限容量的批处理块并在同时发布新项目时调用triggerBatch-在触发批处理执行期间,发布新项目将失败。
调用Trigger batch(每隔X时间)是为了确保数据不会在块中延迟太长时间,在传入数据流暂停或减慢的情况下。
以下代码将输出一些“发布失败”事件。例如:
public static void Main(string[] args)
{
var batchBlock = new BatchBlock<int>(10, new GroupingDataflowBlockOptions() { BoundedCapacity = 10000000 });
var actionBlock = new ActionBlock<int[]>(x => ProcessBatch(x), new ExecutionDataflowBlockOptions() { MaxDegreeOfParallelism = 1 });
batchBlock.LinkTo(actionBlock);
var producerTask = Task.Factory.StartNew(() =>
{
//Post 10K Items
for (int i = 0; i < 10000; i++)
{
var postResult = batchBlock.Post(i);
if (!postResult)
Console.WriteLine("Failed to Post");
}
});
var triggerBatchTask = Task.Factory.StartNew(() =>
{
//Trigger Batch..
for (int i = 0; i < 1000000; i++)
batchBlock.TriggerBatch();
});
producerTask.Wait();
triggerBatchTask.Wait();
}
public static void ProcessBatch(int[] batch)
{
Console.WriteLine("{0} - {1}", batch.First(), batch.Last());
}
请注意,只有当batchBlock是有界的时,才能重现此情况。
我是否遗漏了什么或者这是batchBlock的一个问题?