117 lines
5.4 KiB
C#
117 lines
5.4 KiB
C#
// Admin.NET 项目的版权、商标、专利和其他相关权利均受相应法律法规的保护。使用本项目应遵守相关法律法规和许可证的要求。
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//
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// 本项目主要遵循 MIT 许可证和 Apache 许可证(版本 2.0)进行分发和使用。许可证位于源代码树根目录中的 LICENSE-MIT 和 LICENSE-APACHE 文件。
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//
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// 不得利用本项目从事危害国家安全、扰乱社会秩序、侵犯他人合法权益等法律法规禁止的活动!任何基于本项目二次开发而产生的一切法律纠纷和责任,我们不承担任何责任!
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namespace Admin.NET.Core.Service;
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/// <summary>
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/// 作业集群控制
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/// </summary>
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public class JobClusterServer : IJobClusterServer
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{
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private readonly IServiceScopeFactory _serviceScopeFactory;
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private readonly Random _random = new(DateTime.Now.Millisecond);
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public JobClusterServer(IServiceScopeFactory serviceScopeFactory)
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{
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_serviceScopeFactory = serviceScopeFactory;
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}
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/// <summary>
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/// 当前作业调度器启动通知
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/// </summary>
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/// <param name="context">作业集群服务上下文</param>
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public void Start(JobClusterContext context)
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{
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using var scope = _serviceScopeFactory.CreateScope();
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var db = scope.ServiceProvider.GetRequiredService<ISqlSugarClient>().CopyNew();
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// 在作业集群表中,如果 clusterId 不存在,则新增一条(否则更新一条),并设置 status 为 ClusterStatus.Waiting
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if (db.Queryable<SysJobCluster>().Any(u => u.ClusterId == context.ClusterId))
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{
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db.Updateable<SysJobCluster>().SetColumns(u => u.Status == ClusterStatus.Waiting).Where(u => u.ClusterId == context.ClusterId).ExecuteCommand();
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}
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else
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{
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db.Insertable(new SysJobCluster { ClusterId = context.ClusterId, Status = ClusterStatus.Waiting }).ExecuteCommand();
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}
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}
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/// <summary>
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/// 等待被唤醒
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/// </summary>
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/// <param name="context">作业集群服务上下文</param>
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/// <returns><see cref="Task"/></returns>
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public async Task WaitingForAsync(JobClusterContext context)
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{
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var clusterId = context.ClusterId;
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while (true)
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{
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// 控制集群心跳频率(放在头部为了防止 IsAnyAsync continue 没sleep占用大量IO和CPU)
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await Task.Delay(3000 + _random.Next(500, 1000)); // 错开集群同时启动
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try
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{
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ICache cache = App.GetRequiredService<ICacheProvider>().Cache;
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// 使用分布式锁
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using (cache.AcquireLock("lock:JobClusterServer:WaitingForAsync", 1000))
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{
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// 在这里查询数据库,根据以下两种情况处理
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// 1) 如果作业集群表已有 status 为 ClusterStatus.Working 则继续循环
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// 2) 如果作业集群表中还没有其他服务或只有自己,则插入一条集群服务或调用 await WorkNowAsync(clusterId); 之后 return;
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// 3) 如果作业集群表中没有 status 为 ClusterStatus.Working 的,调用 await WorkNowAsync(clusterId); 之后 return;
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using var scope = _serviceScopeFactory.CreateScope();
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var db = scope.ServiceProvider.GetRequiredService<ISqlSugarClient>().CopyNew();
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var sysJobClusterRep = App.GetRequiredService<SqlSugarRepository<SysJobCluster>>();
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if (await db.Queryable<SysJobCluster>().AnyAsync(u => u.Status == ClusterStatus.Working)) continue;
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await WorkNowAsync(clusterId);
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return;
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}
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}
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catch
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{
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}
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}
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}
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/// <summary>
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/// 当前作业调度器停止通知
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/// </summary>
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/// <param name="context">作业集群服务上下文</param>
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public void Stop(JobClusterContext context)
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{
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// 在作业集群表中,更新 clusterId 的 status 为 ClusterStatus.Crashed
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using var scope = _serviceScopeFactory.CreateScope();
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var db = scope.ServiceProvider.GetRequiredService<ISqlSugarClient>().CopyNew();
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db.Updateable(new SysJobCluster { Status = ClusterStatus.Crashed }).Where(u => u.ClusterId == context.ClusterId).ExecuteCommand();
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}
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/// <summary>
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/// 当前作业调度器宕机
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/// </summary>
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/// <param name="context">作业集群服务上下文</param>
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public void Crash(JobClusterContext context)
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{
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// 在作业集群表中,更新 clusterId 的 status 为 ClusterStatus.Crashed
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using var scope = _serviceScopeFactory.CreateScope();
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var db = scope.ServiceProvider.GetRequiredService<ISqlSugarClient>().CopyNew();
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db.Updateable(new SysJobCluster { Status = ClusterStatus.Crashed }).Where(u => u.ClusterId == context.ClusterId).ExecuteCommand();
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}
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/// <summary>
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/// 指示集群可以工作
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/// </summary>
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/// <param name="clusterId">集群 Id</param>
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/// <returns></returns>
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private async Task WorkNowAsync(string clusterId)
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{
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// 在作业集群表中,更新 clusterId 的 status 为 ClusterStatus.Working
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using var scope = _serviceScopeFactory.CreateScope();
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var db = scope.ServiceProvider.GetRequiredService<ISqlSugarClient>().CopyNew();
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await db.Updateable(new SysJobCluster { Status = ClusterStatus.Working }).Where(u => u.ClusterId == clusterId).ExecuteCommandAsync();
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}
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} |