BatchBlock的BatchSize异常怎么捕获？

batchBlock.Completion

using System;
using System.Linq;
using System.Threading.Tasks;
using System.Threading.Tasks.Dataflow;

public class BatchProcessor
{
    public static async Task RunProcessing()
    {
        var batchBlock = new BatchBlock<int>(5); // 批处理大小为5
        var processBlock = new ActionBlock<int[]>(async batch =>
        {
            Console.WriteLine($"处理批次 (大小: {batch.Length}): {string.Join(", ", batch)}");
            // 模拟一个下游处理可能抛出的异常
            if (batch.Contains(13))
            {
                throw new InvalidOperationException("哎呀，批次里有不吉利的数字！");
            }
            await Task.Delay(100); // 模拟异步处理
        }, new ExecutionDataflowBlockOptions { MaxDegreeOfParallelism = 2 });

        // 将BatchBlock连接到处理块，并传播完成和异常
        batchBlock.LinkTo(processBlock, new DataflowLinkOptions { PropagateCompletion = true });

        // 异步发送数据
        _ = Task.Run(async () =>
        {
            for (int i = 0; i < 15; i++) // 发送15个数据，故意让尾部不完整
            {
                if (i == 13) // 故意插入一个会触发异常的数据
                {
                    await batchBlock.SendAsync(i);
                }
                else
                {
                    await batchBlock.SendAsync(i);
                }
                await Task.Delay(50);
            }
            batchBlock.Complete(); // 数据发送完毕，通知BatchBlock完成
        });

        try
        {
            // 等待整个数据流处理完成
            await processBlock.Completion;
            Console.WriteLine("所有批次处理完毕，流程正常结束。");
        }
        catch (AggregateException ae)
        {
            Console.WriteLine("\n捕获到异常！");
            foreach (var ex in ae.Flatten().InnerExceptions)
            {
                Console.WriteLine($"错误类型: {ex.GetType().Name}, 消息: {ex.Message}");
            }
            Console.WriteLine("批处理流程因错误终止。");
        }
        catch (Exception ex)
        {
            Console.WriteLine($"捕获到未知异常: {ex.Message}");
        }
    }

    // public static async Task Main(string[] args)
    // {
    //     await RunProcessing();
    // }
}

ActionBlock

TransformBlock

int[]

ArgumentException

// 假设你有一个方法，负责将数据发送到BatchBlock
public async Task SendDataToBatchBlock(BatchBlock<string> batchBlock, IEnumerable<string> dataItems)
{
    foreach (var item in dataItems)
    {
        await batchBlock.SendAsync(item);
    }
    batchBlock.Complete(); // 关键一步：告诉BatchBlock所有数据都已发送
}

// 在使用时：
// var myBatchBlock = new BatchBlock<string>(10);
// var myProcessBlock = new ActionBlock<string[]>(batch => { /* 处理批次 */ });
// myBatchBlock.LinkTo(myProcessBlock, new DataflowLinkOptions { PropagateCompletion = true });

// var allMyData = new List<string> { "item1", "item2", "item3", "item4", "item5", "item6", "item7" }; // 7个数据，批大小10
// await SendDataToBatchBlock(myBatchBlock, allMyData);
// await myProcessBlock.Completion; // 等待所有处理完成
// 此时，即使只有7个数据，也会形成一个大小为7的批次被处理。

myBatchBlock

PropagateCompletion

true

AggregateException.InnerExceptions

using System;
using System.Linq;
using System.Threading.Tasks;
using System.Threading.Tasks.Dataflow;

public class GracefulExceptionHandling
{
    public static async Task RunWithErrorHandling()
    {
        var batchBlock = new BatchBlock<int>(5);
        var transformBlock = new TransformBlock<int[], string[]>(batch =>
        {
            // 模拟一个处理逻辑，可能会根据批次内容抛出异常
            if (batch.Any(x => x % 7 == 0)) // 如果批次里有7的倍数，就抛异常
            {
                throw new ApplicationException($"批次中包含7的倍数，无法处理: {string.Join(",", batch)}");
            }
            return batch.Select(x => $"Processed:{x}").ToArray();
        }, new ExecutionDataflowBlockOptions { MaxDegreeOfParallelism = 2 });

        var actionBlock = new ActionBlock<string[]>(processedBatch =>
        {
            Console.WriteLine($"成功处理并输出批次: {string.Join(", ", processedBatch)}");
        });

        batchBlock.LinkTo(transformBlock, new DataflowLinkOptions { PropagateCompletion = true });
        transformBlock.LinkTo(actionBlock, new DataflowLinkOptions { PropagateCompletion = true });

        // 模拟数据输入
        _ = Task.Run(async () =>
        {
            for (int i = 0; i < 20; i++)
            {
                await batchBlock.SendAsync(i);
                await Task.Delay(50);
            }
            batchBlock.Complete(); // 通知完成
        });

        try
        {
            // 等待最终的ActionBlock完成，它会反映整个数据流的状态
            await actionBlock.Completion;
            Console.WriteLine("所有数据流处理完成，没有异常。");
        }
        catch (AggregateException ae)
        {
            Console.WriteLine("\n捕获到数据流异常！");
            foreach (var innerEx in ae.Flatten().InnerExceptions)
            {
                Console.WriteLine($"错误详情: {innerEx.GetType().Name} - {innerEx.Message}");
                // 这里可以进行日志记录、报警等操作
            }
            Console.WriteLine("数据流因异常而终止。");
        }
        catch (Exception ex)
        {
            Console.WriteLine($"捕获到非AggregateException: {ex.Message}");
        }
    }

    // public static async Task Main(string[] args)
    // {
    //     await RunWithErrorHandling();
    // }
}