Getting Started

Storage

Hangfire 會將所有相關資訊會被序列化後保存到儲存區，如類型、方法或參數等。

儲存模型官方預設有以下幾種

	Sql Server 2008+	Redis 2.6.12+	In-Memory	Price
Open	✔		✔	free
Startup	✔	✔	✔	$500 / per year
Business	✔	✔	✔	$1,500 / per year
Enterprise	✔	✔	✔	$4,500 / per year

資料來源日期: 2024/03/12

// Hangfire 1.8
GlobalConfiguration
    .Configuration
    .SetDataCompatibilityLevel(CompatibilityLevel.Version_180)
    .UseSimpleAssemblyNameTypeSerializer()
    .UseRecommendedSerializerSettings()
    .UseSqlServerStorage("Database=Hangfire.Sample; Integrated Security=True;");

// Hangfire 1.7
GlobalConfiguration
    .Configuration
    .SetDataCompatibilityLevel(CompatibilityLevel.Version_170)
    .UseSimpleAssemblyNameTypeSerializer()
    .UseRecommendedSerializerSettings()
    .UseSqlServerStorage("Database=Hangfire.Sample; Integrated Security=True;", new SqlServerStorageOptions
    {
        CommandBatchMaxTimeout = TimeSpan.FromMinutes(5),
        SlidingInvisibilityTimeout = TimeSpan.FromMinutes(5),
        QueuePollInterval = TimeSpan.Zero,
        UseRecommendedIsolationLevel = true,
        DisableGlobalLocks = true, // Migration to Schema 7 is required
    });

// Hangfire SQLite
GlobalConfiguration
    .Configuration
    .UseSQLiteStorage("HangfireExample.db"));

Server

啟動 Hangfire 伺服器

services.AddHangfireServer();

Using Dashboard UI

開啟 Dashboard 功能

app.UseHangfireDashboard();

• Configuring Authorization

設定自定義驗證

app.UseHangfireDashboard("hangfire", new DashboardOptions
{
    Authorization = [new DashboardAuthorizationFilter()],
});

• Read-only view

設定 UI 為 ReadOnly

app.UseHangfireDashboard("hangfire", new DashboardOptions
{
    IsReadOnlyFunc = (DashboardContext context) => true,
});

• Change URL Mapping

修改 Dashboard UI 的預設根路由

app.UseHangfireDashboard("hangfire");

• Change Back to site Link

修改返回按鈕的路由

app.UseHangfireDashboard("hangfire", new DashboardOptions
{
    AppPath = "/swagger", // 導向到 Swagger UI
});

• Multiple Dashboards

設定不同資料來源的 Dashboard

app.UseHangfireDashboard(configuration.GetValue<string>("DashboardRoot"), new DashboardOptions
{
    Authorization = [new DashboardAuthorizationFilter()],
    // 指定 Dashboard 指定讀取，不能操作，如重新執行、再次加入排程與刪除任務等
    IsReadOnlyFunc = (DashboardContext context) => true,
    // 指定 Back to site 的連結
    AppPath = "/swagger",
}, new SQLiteStorage("HangfireExample2.db"));

Background Methods

排程可以直接執行特定方法，Hangfire 會將方法(可使用非同步)、類型與參數序列化後保存到資料庫，Hangfire 依照排程類型，分為以下四種

• Fire-and-Forget jobs: 將任務丟入執行佇列，直接執行

BackgroundJob.Enqueue(() => Console.WriteLine("Fire-and-Forget"));

• Delayed jobs: 延遲指定時間後，將任務丟入執行佇列

BackgroundJob.Schedule(() => Console.WriteLine("Delayed"), TimeSpan.FromDays(1));

• Recurring jobs: 依照指定間隔，將任務丟入執行佇列

Cron Expression 測試

秒	分	時	月中的日	週中的日	年	說明
0/30	*	*	*	*	*	每30秒執行一次
30	9	*	*	*	*	每日早上09:30執行一次(UTC)
30	9	*	*	MON-FRI	*	每週一到週五早上09:30執行一次(UTC)
30	09	*	1	*	*	每月1號早上09:30執行一次(UTC)
0/30	0-30	9	*	*	*	每日早上09:00~09:30，每30秒執行一次(UTC)
0/30	*	9-12	*	*	*	每日早上09:00~12:00，每30秒執行一次(UTC)
0/30	*	9-12	1-5	*	*	每月1號到5號早上09:00~12:00，每30秒執行一次(UTC)

RecurringJob.AddOrUpdate("job_id", () => Console.Write("Recurring By CRON"), Cron.Daily);

RecurringJob.AddOrUpdate("job_id", () => Console.Write("Recurring By CRON expressions"), "* 0/1 * * ? *");

移除已存在的排程任務

RecurringJob.RemoveIfExists("job_id");

手動觸發已存在的排程任務

RecurringJob.Trigger("job_id");

• Continuations: 指定的任務完成後，才丟入執行佇列

var jobId = BackgroundJob.Enqueue(() => Console.WriteLine("Fire-and-Forget"));

BackgroundJob.ContinueJobWith(jobid, () => Console.WriteLine("Continuations"));