Hangfire是一个开源的任务调度框架,它内置集成了控制页面,很方便我们查看,控制作业的运行;对于运行失败的作业自动重试运行。它支持永久性存储,支持存储于mssql,mysql,mongodb,redis等
想了解更多关于Hangfire,请移步hangfire官网https://www.hangfire.io/
第一步:创建WebApi项目承载任务调度
引入Hangfire和Hangfire.MySql.Core(因为我使用的mysql作为定时任务数据持久化的数据库,所以需要Hangfire.MySql.Core)
修改appsettings.json配置文件,添加持久化作业数据的数据库连接
"ConnectionStrings": {
"DiseaseJobConnection": "Server=localhost;port=3306;Database=diseasejob;User Id=root;password=root23456;Allow User Variables=True"
},
第二步、创建作业业务类
/// <summary>
/// 疫情业务类
/// </summary>
public class DiseaseService : IDiseaseService
{
private IHttpClientFactory \_httpClientFactory = null;
// private DiseaseDataContext \_diseaseDataContext = null;
/// <summary>
///
/// </summary>
/// <param name="httpClientFactory"></param>
/// <param name="diseaseDataContext"></param>
public DiseaseService(IHttpClientFactory httpClientFactory) //, DiseaseDataContext diseaseDataContext)
{
this.\_httpClientFactory = httpClientFactory;
//\_diseaseDataContext = diseaseDataContext;
}
/// <summary>
/// 同步疫情
/// </summary>
/// <returns></returns>
public async Task<string> SyncDiseaseData()
{
//TODO同步疫情数据
return "";
}
第三步、在startup.cs中注入Hangfire
ConfigureServices方法中添加
services.AddHttpClient(); //注入HttpClient
#region hangfire
var storage = new MySqlStorage(Configuration.GetConnectionString("DiseaseJobConnection")
, new MySqlStorageOptions { PrepareSchemaIfNecessary = true, TablePrefix = "Disease" });
//GlobalConfiguration.Configuration.UseStorage(new MySqlStorage(storage, new MySqlStorageOptions
//{
// TransactionIsolationLevel = IsolationLevel.ReadCommitted, // 事务隔离级别。默认值为读提交。
// QueuePollInterval = TimeSpan.FromSeconds(15), // 作业队列轮询间隔。默认值为15秒
// JobExpirationCheckInterval = TimeSpan.FromHours(1), // 作业过期检查间隔(管理过期记录)。默认为1小时
// CountersAggregateInterval = TimeSpan.FromMinutes(5), // 间隔到聚合计数器。默认为5分钟
// PrepareSchemaIfNecessary = true, // 如果设置为true,则创建数据库表。默认值为true
// DashboardJobListLimit = 50000, // 仪表板作业列表上限。默认值为50000
// TransactionTimeout = TimeSpan.FromMinutes(1), // 事务超时。默认为1分钟
//}));
services.AddHangfire(p => p.UseStorage(storage));
#endregion
services.AddScoped<DiseaseService>(); //注入业务
在Configure方法中
//hangfire
app.UseHangfireServer();
app.UseHangfireDashboard();
//作业
RecurringJob.AddOrUpdate<DiseaseService>("SyncDiseaseInformation", p => p.SyncDiseaseData(), "0 9,12,18,0 \* \* ?");
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运行程序后切换到hangfire管理页面如下图:
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