优先级队列,增加hash去重,覆盖优先级测试
continuous-integration/drone/push Build is passing Details

Test_IRC_Net8
hang 2026-04-03 16:00:24 +08:00
parent cad9eaf966
commit 5a7796939f
6 changed files with 440 additions and 73 deletions

View File

@ -7,6 +7,7 @@ using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting; using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging; using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using System; using System;
using System.Linq; using System.Linq;
using System.Threading; using System.Threading;
@ -20,40 +21,50 @@ public class SyncFileRecoveryService(IServiceScopeFactory _scopeFactory, FileSyn
private readonly int _pageSize = 500; private readonly int _pageSize = 500;
/// <summary>
/// 多个程序如果恢复同一份数据造成重复同步SCP服务不恢复任务
/// </summary>
/// <param name="stoppingToken"></param>
/// <returns></returns>
protected override async Task ExecuteAsync(CancellationToken stoppingToken) protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{ {
using var scope = _scopeFactory.CreateScope();
var fileUploadRecordRepository = scope.ServiceProvider.GetRequiredService<IRepository<FileUploadRecord>>();
// 延迟启动,保证主机快速启动 await Task.CompletedTask;
await Task.Delay(5000, stoppingToken);
int page = 0; //using var scope = _scopeFactory.CreateScope();
//var fileUploadRecordRepository = scope.ServiceProvider.GetRequiredService<IRepository<FileUploadRecord>>();
//// 延迟启动,保证主机快速启动
//await Task.Delay(5000, stoppingToken);
//int page = 0;
while (!stoppingToken.IsCancellationRequested) //while (!stoppingToken.IsCancellationRequested)
{ //{
// 分页获取未入队任务 // // 分页获取未入队任务
var pending = await fileUploadRecordRepository // var pending = await fileUploadRecordRepository
.Where(x => x.IsNeedSync == true && (x.IsSync == false || x.IsSync == null)) // .Where(x => x.IsNeedSync == true && (x.IsSync == false || x.IsSync == null))
.OrderByDescending(x => x.Priority) // .OrderByDescending(x => x.Priority)
.Select(t => new { t.Id, t.Priority }) // .Select(t => new { t.Id, t.Priority })
.Skip(page * _pageSize) // .Skip(page * _pageSize)
.Take(_pageSize) // .Take(_pageSize)
.ToListAsync(stoppingToken); // .ToListAsync(stoppingToken);
if (!pending.Any()) // if (!pending.Any())
break; // 扫描完毕,退出循环 // break; // 扫描完毕,退出循环
// foreach (var file in pending)
// {
// //file.IsQueued = true; // 避免重复入队
// _fileSyncQueue.Enqueue(file.Id, file.Priority ?? 0); // 放入队列
// }
// page++; // 下一页
// await Task.Delay(200, stoppingToken); // 缓解数据库压力
//}
foreach (var file in pending)
{
//file.IsQueued = true; // 避免重复入队
_fileSyncQueue.Enqueue(file.Id, file.Priority ?? 0); // 放入队列
}
page++; // 下一页
await Task.Delay(200, stoppingToken); // 缓解数据库压力
}
} }
} }
@ -85,12 +96,29 @@ public class FileSyncWorker(IServiceScopeFactory _scopeFactory, ILogger<FileSync
using var scope = _scopeFactory.CreateScope(); using var scope = _scopeFactory.CreateScope();
var _fileUploadRecordRepository = scope.ServiceProvider.GetRequiredService<IRepository<FileUploadRecord>>(); var _fileUploadRecordRepository = scope.ServiceProvider.GetRequiredService<IRepository<FileUploadRecord>>();
var _uploadFileSyncRecordRepository = scope.ServiceProvider.GetRequiredService<IRepository<UploadFileSyncRecord>>(); var _uploadFileSyncRecordRepository = scope.ServiceProvider.GetRequiredService<IRepository<UploadFileSyncRecord>>();
var syncConfig = (scope.ServiceProvider.GetRequiredService<IOptionsMonitor<ObjectStoreServiceOptions>>()).CurrentValue;
var oss = scope.ServiceProvider.GetRequiredService<IOSSService>(); var oss = scope.ServiceProvider.GetRequiredService<IOSSService>();
var file = await _fileUploadRecordRepository.FirstOrDefaultAsync(t => t.Id == id); var file = await _fileUploadRecordRepository.FirstOrDefaultAsync(t => t.Id == id);
if (file == null || file.IsNeedSync != true) // ✅ 不要 return
if (file == null || file.IsNeedSync != true || syncConfig.IsOpenStoreSync == false)
{
continue;
}
if (syncConfig.SyncConfigList.Any(t => t.UploadRegion == file.UploadRegion && t.IsOpenSync == false))
{
continue;
}
//如果发现系统配置某一边同步进行了关闭,那么就直接返回,不执行任务
if (syncConfig.SyncConfigList.Any(t => t.UploadRegion == file.UploadRegion && t.IsOpenSync == false))
{
return; return;
}
var log = new UploadFileSyncRecord var log = new UploadFileSyncRecord
{ {
@ -126,6 +154,11 @@ public class FileSyncWorker(IServiceScopeFactory _scopeFactory, ILogger<FileSync
{ {
_logger.LogError(ex, "Sync failed {Id}", id); _logger.LogError(ex, "Sync failed {Id}", id);
} }
finally
{
// ⭐⭐⭐ 永远执行
_fileSyncQueue.Complete(id);
}
} }

View File

@ -42,6 +42,7 @@ public class FileUploadRecordAddOrEdit
public string UploadBatchId { get; set; } public string UploadBatchId { get; set; }
public BatchDataType BatchDataType { get; set; } public BatchDataType BatchDataType { get; set; }
public string StudyCode { get; set; }
public Guid? TrialId { get; set; } public Guid? TrialId { get; set; }
@ -82,7 +83,7 @@ public class FileUploadRecordService(IRepository<FileUploadRecord> _fileUploadRe
public async Task<IResponseOutput> AddOrUpdateFileUploadRecord(FileUploadRecordAddOrEdit addOrEditFileUploadRecord) public async Task<IResponseOutput> AddOrUpdateFileUploadRecord(FileUploadRecordAddOrEdit addOrEditFileUploadRecord)
{ {
@ -98,6 +99,18 @@ public class FileUploadRecordService(IRepository<FileUploadRecord> _fileUploadRe
addOrEditFileUploadRecord.TargetRegion = find.TargetRegion; addOrEditFileUploadRecord.TargetRegion = find.TargetRegion;
} }
else
{
//前后端调试的时候,上传的时候域名不对应,自动按照后端配置设置上传区域和同步区域
var apiDefalut = ObjectStoreServiceConfig.SyncConfigList.FirstOrDefault(t => t.UploadRegion == ObjectStoreServiceConfig.ApiDeployRegion);
if (apiDefalut != null)
{
addOrEditFileUploadRecord.UploadRegion = apiDefalut.UploadRegion;
addOrEditFileUploadRecord.TargetRegion = apiDefalut.TargetRegion;
}
}
} }
if (addOrEditFileUploadRecord.TrialId != null) if (addOrEditFileUploadRecord.TrialId != null)
@ -122,7 +135,9 @@ public class FileUploadRecordService(IRepository<FileUploadRecord> _fileUploadRe
} }
else else
{ {
addOrEditFileUploadRecord.TargetRegion = ""; addOrEditFileUploadRecord.IsNeedSync = false;
//addOrEditFileUploadRecord.TargetRegion = "";
} }
@ -154,40 +169,149 @@ public class FileUploadRecordService(IRepository<FileUploadRecord> _fileUploadRe
/// <summary> public sealed class FileSyncQueue
/// 同步队列 信号量
/// </summary>
public class FileSyncQueue
{ {
/// <summary>
/// 优先级队列(仅负责排序)
/// </summary>
private readonly PriorityQueue<Guid, int> _queue = new(); private readonly PriorityQueue<Guid, int> _queue = new();
/// <summary>
/// 当前等待中的任务(唯一真实数据)
/// key = Guid
/// value = 最新 priority
/// </summary>
private readonly Dictionary<Guid, int> _waiting = new();
/// <summary>
/// 正在执行的任务(防止重复执行)
/// </summary>
private readonly HashSet<Guid> _running = new();
/// <summary>
/// worker 等待信号
/// </summary>
private readonly SemaphoreSlim _signal = new(0); private readonly SemaphoreSlim _signal = new(0);
private readonly object _lock = new(); private readonly object _lock = new();
// ============================================================
// Enqueue
// ============================================================
/// <summary>
/// 入队(同 Guid 会覆盖优先级)
/// </summary>
public void Enqueue(Guid id, int priority) public void Enqueue(Guid id, int priority)
{ {
bool needSignal = false;
lock (_lock) lock (_lock)
{ {
// priority 越大越优先 // 如果正在执行,忽略(防止重复)
if (_running.Contains(id))
return;
// 是否新任务(用于减少 signal 风暴)
if (!_waiting.ContainsKey(id))
needSignal = true;
// 更新为最新优先级(最后一次为准)
_waiting[id] = priority; //等价于添加或者更新
// PriorityQueue 无法更新节点
// 允许旧节点存在Dequeue 时过滤
_queue.Enqueue(id, -priority); _queue.Enqueue(id, -priority);
} }
//类似于计数器,不会产生通知风暴,可消费资源 +1 // 只有新增任务才唤醒 worker
//if (有等待线程) 唤醒一个 else 仅增加计数 if (needSignal)
_signal.Release(); // 唤醒一个 worker _signal.Release();
} }
// ============================================================
// Dequeue
// ============================================================
/// <summary> /// <summary>
/// 如果没有任务 → 挂起等待 有任务 → 被唤醒并返回 /// 获取一个待执行任务(无任务时自动等待)
/// </summary> /// </summary>
/// <param name="ct"></param>
/// <returns></returns>
public async Task<Guid> DequeueAsync(CancellationToken ct) public async Task<Guid> DequeueAsync(CancellationToken ct)
{ {
await _signal.WaitAsync(ct); while (true)
{
await _signal.WaitAsync(ct);
lock (_lock)
{
while (_queue.Count > 0)
{
var id = _queue.Dequeue();
// 已被覆盖或取消
if (!_waiting.TryGetValue(id, out _))
continue;
// 标记为运行中
_waiting.Remove(id);
_running.Add(id);
return id;
}
}
}
}
// ============================================================
// Complete
// ============================================================
/// <summary>
/// 任务执行完成(必须调用)
/// </summary>
public void Complete(Guid id)
{
lock (_lock) lock (_lock)
{ {
return _queue.Dequeue(); _running.Remove(id);
}
}
// ============================================================
// Snapshot
// ============================================================
/// <summary>
/// 当前等待中的任务快照
/// </summary>
public Guid[] Snapshot()
{
lock (_lock)
{
return _waiting.Keys.ToArray();
}
}
// ============================================================
// 状态信息(调试用)
// ============================================================
public int WaitingCount
{
get
{
lock (_lock)
return _waiting.Count;
}
}
public int RunningCount
{
get
{
lock (_lock)
return _running.Count;
} }
} }
} }

View File

@ -20,6 +20,11 @@ public class SyncFileRecoveryService(IServiceScopeFactory _scopeFactory, FileSyn
private readonly int _pageSize = 500; private readonly int _pageSize = 500;
/// <summary>
/// 多个程序如果恢复同一份数据造成重复同步SCP服务不恢复任务
/// </summary>
/// <param name="stoppingToken"></param>
/// <returns></returns>
protected override async Task ExecuteAsync(CancellationToken stoppingToken) protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{ {
using var scope = _scopeFactory.CreateScope(); using var scope = _scopeFactory.CreateScope();
@ -73,7 +78,6 @@ public class FileSyncWorker(IServiceScopeFactory _scopeFactory, ILogger<FileSync
return Task.CompletedTask; return Task.CompletedTask;
} }
private async Task WorkerLoop(CancellationToken stoppingToken) private async Task WorkerLoop(CancellationToken stoppingToken)
{ {
while (!stoppingToken.IsCancellationRequested) while (!stoppingToken.IsCancellationRequested)
@ -92,8 +96,16 @@ public class FileSyncWorker(IServiceScopeFactory _scopeFactory, ILogger<FileSync
var file = await _fileUploadRecordRepository.FirstOrDefaultAsync(t => t.Id == id); var file = await _fileUploadRecordRepository.FirstOrDefaultAsync(t => t.Id == id);
// ✅ 不要 return
if (file == null || file.IsNeedSync != true || syncConfig.IsOpenStoreSync == false) if (file == null || file.IsNeedSync != true || syncConfig.IsOpenStoreSync == false)
return; {
continue;
}
if (syncConfig.SyncConfigList.Any(t => t.UploadRegion == file.UploadRegion && t.IsOpenSync == false))
{
continue;
}
//如果发现系统配置某一边同步进行了关闭,那么就直接返回,不执行任务 //如果发现系统配置某一边同步进行了关闭,那么就直接返回,不执行任务
if (syncConfig.SyncConfigList.Any(t => t.UploadRegion == file.UploadRegion && t.IsOpenSync == false)) if (syncConfig.SyncConfigList.Any(t => t.UploadRegion == file.UploadRegion && t.IsOpenSync == false))
@ -116,7 +128,7 @@ public class FileSyncWorker(IServiceScopeFactory _scopeFactory, ILogger<FileSync
await oss.SyncFileAsync(file.Path.TrimStart('/'), file.UploadRegion == "CN" ? ObjectStoreUse.AliyunOSS : ObjectStoreUse.AWS, file.UploadRegion == "CN" ? ObjectStoreUse.AWS : ObjectStoreUse.AliyunOSS); await oss.SyncFileAsync(file.Path.TrimStart('/'), file.UploadRegion == "CN" ? ObjectStoreUse.AliyunOSS : ObjectStoreUse.AWS, file.UploadRegion == "CN" ? ObjectStoreUse.AWS : ObjectStoreUse.AliyunOSS);
file.IsSync = true; file.IsSync = true;
file.SyncFinishedTime = DateTime.UtcNow; file.SyncFinishedTime = DateTime.Now;
log.JobState = jobState.SUCCESS; log.JobState = jobState.SUCCESS;
} }
@ -127,7 +139,7 @@ public class FileSyncWorker(IServiceScopeFactory _scopeFactory, ILogger<FileSync
log.Msg = ex.Message[..300]; log.Msg = ex.Message[..300];
} }
log.EndTime = DateTime.UtcNow; log.EndTime = DateTime.Now;
await _uploadFileSyncRecordRepository.SaveChangesAsync(stoppingToken); await _uploadFileSyncRecordRepository.SaveChangesAsync(stoppingToken);
} }
@ -135,6 +147,11 @@ public class FileSyncWorker(IServiceScopeFactory _scopeFactory, ILogger<FileSync
{ {
_logger.LogError(ex, "Sync failed {Id}", id); _logger.LogError(ex, "Sync failed {Id}", id);
} }
finally
{
// ⭐⭐⭐ 永远执行
_fileSyncQueue.Complete(id);
}
} }

View File

@ -1577,23 +1577,54 @@
<param name="inQuery"></param> <param name="inQuery"></param>
<returns></returns> <returns></returns>
</member> </member>
<member name="T:IRaCIS.Core.Application.Service.FileSyncQueue"> <member name="M:IRaCIS.Core.Application.Service.FileUploadRecordService.BatchAddSyncFileTask(IRaCIS.Core.Application.ViewModel.BatchAddSyncFileCommand)">
<summary> <summary>
同步队列 信号量 批量设置为需要同步,并且设置优先级
</summary>
<param name="inComand"></param>
<returns></returns>
</member>
<member name="F:IRaCIS.Core.Application.Service.FileSyncQueue._queue">
<summary>
优先级队列(仅负责排序)
</summary>
</member>
<member name="F:IRaCIS.Core.Application.Service.FileSyncQueue._waiting">
<summary>
当前等待中的任务(唯一真实数据)
key = Guid
value = 最新 priority
</summary>
</member>
<member name="F:IRaCIS.Core.Application.Service.FileSyncQueue._running">
<summary>
正在执行的任务(防止重复执行)
</summary>
</member>
<member name="F:IRaCIS.Core.Application.Service.FileSyncQueue._signal">
<summary>
worker 等待信号
</summary>
</member>
<member name="M:IRaCIS.Core.Application.Service.FileSyncQueue.Enqueue(System.Guid,System.Int32)">
<summary>
入队(同 Guid 会覆盖优先级)
</summary> </summary>
</member> </member>
<member name="M:IRaCIS.Core.Application.Service.FileSyncQueue.DequeueAsync(System.Threading.CancellationToken)"> <member name="M:IRaCIS.Core.Application.Service.FileSyncQueue.DequeueAsync(System.Threading.CancellationToken)">
<summary> <summary>
如果没有任务 → 挂起等待 有任务 → 被唤醒并返回 获取一个待执行任务(无任务时自动等待)
</summary>
</member>
<member name="M:IRaCIS.Core.Application.Service.FileSyncQueue.Complete(System.Guid)">
<summary>
任务执行完成(必须调用)
</summary> </summary>
<param name="ct"></param>
<returns></returns>
</member> </member>
<member name="M:IRaCIS.Core.Application.Service.FileSyncQueue.Snapshot"> <member name="M:IRaCIS.Core.Application.Service.FileSyncQueue.Snapshot">
<summary> <summary>
获取队列任务Id 当前等待中的任务快照
</summary> </summary>
<returns></returns>
</member> </member>
<member name="M:IRaCIS.Core.Application.Service.SyncQueueUseChannel.Enqueue(System.Guid,System.Int32)"> <member name="M:IRaCIS.Core.Application.Service.SyncQueueUseChannel.Enqueue(System.Guid,System.Int32)">
<summary> <summary>

View File

@ -228,4 +228,6 @@ public class UploadFileSyncRecordQuery : PageInput
public class BatchAddSyncFileCommand public class BatchAddSyncFileCommand
{ {
public List<Guid> FileUploadRecordIdList { get; set; } public List<Guid> FileUploadRecordIdList { get; set; }
public int? Priority { get; set; }
} }

View File

@ -150,12 +150,25 @@ public class FileUploadRecordService(IRepository<FileUploadRecord> _fileUploadRe
} }
/// <summary>
/// 批量设置为需要同步,并且设置优先级
/// </summary>
/// <param name="inComand"></param>
/// <returns></returns>
public async Task<IResponseOutput> BatchAddSyncFileTask(BatchAddSyncFileCommand inComand) public async Task<IResponseOutput> BatchAddSyncFileTask(BatchAddSyncFileCommand inComand)
{ {
await _fileUploadRecordRepository.BatchUpdateNoTrackingAsync(t => inComand.FileUploadRecordIdList.Contains(t.Id), u => new FileUploadRecord() { IsNeedSync = true, Priority = inComand.Priority });
foreach (var item in inComand.FileUploadRecordIdList)
{
_fileSyncQueue.Enqueue(item, inComand.Priority ?? 0);
}
await _fileUploadRecordRepository.SaveChangesAsync();
return ResponseOutput.Ok(); return ResponseOutput.Ok();
} }
@ -253,59 +266,206 @@ public class FileUploadRecordService(IRepository<FileUploadRecord> _fileUploadRe
#region 同步队列 #region 同步队列
public sealed class FileSyncQueue
/// <summary>
/// 同步队列 信号量
/// </summary>
public class FileSyncQueue
{ {
/// <summary>
/// 优先级队列(仅负责排序)
/// </summary>
private readonly PriorityQueue<Guid, int> _queue = new(); private readonly PriorityQueue<Guid, int> _queue = new();
/// <summary>
/// 当前等待中的任务(唯一真实数据)
/// key = Guid
/// value = 最新 priority
/// </summary>
private readonly Dictionary<Guid, int> _waiting = new();
/// <summary>
/// 正在执行的任务(防止重复执行)
/// </summary>
private readonly HashSet<Guid> _running = new();
/// <summary>
/// worker 等待信号
/// </summary>
private readonly SemaphoreSlim _signal = new(0); private readonly SemaphoreSlim _signal = new(0);
private readonly object _lock = new(); private readonly object _lock = new();
// ============================================================
// Enqueue
// ============================================================
/// <summary>
/// 入队(同 Guid 会覆盖优先级)
/// </summary>
public void Enqueue(Guid id, int priority) public void Enqueue(Guid id, int priority)
{ {
bool needSignal = false;
lock (_lock) lock (_lock)
{ {
// priority 越大越优先 // 如果正在执行,忽略(防止重复)
if (_running.Contains(id))
return;
// 是否新任务(用于减少 signal 风暴)
if (!_waiting.ContainsKey(id))
needSignal = true;
// 更新为最新优先级(最后一次为准)
_waiting[id] = priority; //等价于添加或者更新
// PriorityQueue 无法更新节点
// 允许旧节点存在Dequeue 时过滤
_queue.Enqueue(id, -priority); _queue.Enqueue(id, -priority);
} }
//类似于计数器,不会产生通知风暴,可消费资源 +1 // 只有新增任务才唤醒 worker
//if (有等待线程) 唤醒一个 else 仅增加计数 if (needSignal)
_signal.Release(); // 唤醒一个 worker _signal.Release();
} }
// ============================================================
// Dequeue
// ============================================================
/// <summary> /// <summary>
/// 如果没有任务 → 挂起等待 有任务 → 被唤醒并返回 /// 获取一个待执行任务(无任务时自动等待)
/// </summary> /// </summary>
/// <param name="ct"></param>
/// <returns></returns>
public async Task<Guid> DequeueAsync(CancellationToken ct) public async Task<Guid> DequeueAsync(CancellationToken ct)
{ {
await _signal.WaitAsync(ct); while (true)
lock (_lock)
{ {
return _queue.Dequeue(); await _signal.WaitAsync(ct);
lock (_lock)
{
while (_queue.Count > 0)
{
var id = _queue.Dequeue();
// 已被覆盖或取消 如果这个任务已经不是“当前最新版任务”,那它只是 PriorityQueue 里的垃圾数据,直接跳过。
if (!_waiting.TryGetValue(id, out _)) //能从等待任务中取到,那么就是有效的,不能取到那么就是覆盖的
continue;
// 标记为运行中
_waiting.Remove(id);
_running.Add(id);
return id;
}
}
} }
} }
// ============================================================
// Complete
// ============================================================
/// <summary> /// <summary>
/// 获取队列任务Id /// 任务执行完成(必须调用)
/// </summary>
public void Complete(Guid id)
{
lock (_lock)
{
_running.Remove(id);
}
}
// ============================================================
// Snapshot
// ============================================================
/// <summary>
/// 当前等待中的任务快照
/// </summary> /// </summary>
/// <returns></returns>
public Guid[] Snapshot() public Guid[] Snapshot()
{ {
lock (_lock) lock (_lock)
{ {
return _queue.UnorderedItems return _waiting.Keys.ToArray();
.Select(x => x.Element) }
.ToArray(); }
// ============================================================
// 状态信息(调试用)
// ============================================================
public int WaitingCount
{
get
{
lock (_lock)
return _waiting.Count;
}
}
public int RunningCount
{
get
{
lock (_lock)
return _running.Count;
} }
} }
} }
///// <summary>
///// 同步队列 信号量
///// </summary>
//public class FileSyncQueue
//{
// private readonly PriorityQueue<Guid, int> _queue = new();
// private readonly SemaphoreSlim _signal = new(0);
// private readonly object _lock = new();
// public void Enqueue(Guid id, int priority)
// {
// lock (_lock)
// {
// // priority 越大越优先
// _queue.Enqueue(id, -priority);
// }
// //类似于计数器,不会产生通知风暴,可消费资源 +1
// //if (有等待线程) 唤醒一个 else 仅增加计数
// _signal.Release(); // 唤醒一个 worker
// }
// /// <summary>
// /// 如果没有任务 → 挂起等待 有任务 → 被唤醒并返回
// /// </summary>
// /// <param name="ct"></param>
// /// <returns></returns>
// public async Task<Guid> DequeueAsync(CancellationToken ct)
// {
// await _signal.WaitAsync(ct);
// lock (_lock)
// {
// return _queue.Dequeue();
// }
// }
// /// <summary>
// /// 获取队列任务Id
// /// </summary>
// /// <returns></returns>
// public Guid[] Snapshot()
// {
// lock (_lock)
// {
// return _queue.UnorderedItems
// .Select(x => x.Element)
// .ToArray();
// }
// }
//}
#region 这里不用 SyncQueueUseChannel 和调度器 SyncScheduler #region 这里不用 SyncQueueUseChannel 和调度器 SyncScheduler
public class SyncQueueUseChannel public class SyncQueueUseChannel
{ {