Hosted Services+Quartz实现定时任务调度
背景
之前.net core使用quartz.net时,总感觉非常变扭,百度和谷歌了N久都没解决以下问题,造成代码丑陋,非常不优雅:
1.项目启动时,要立刻恢复执行quartz.net中的任务
2.quartz.net中的Job任务无法使用ioc注入,要额外写一套
直到最近看到这篇文章.Net Core小技巧 - Hosted Services + Quartz实现定时任务调度,终于解决了我的问题,特此记录一下
前后代码对比
Program.cs
前
查看详细内容
public class Program
{
public static void Main(string[] args)
{
var host = CreateWebHostBuilder(args).Build();
QuartzFactory.StartSpider();
host.Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>();
}
后
查看详细内容
class Program
{
static async Task Main(string[] args)
{
var host = new HostBuilder()
.ConfigureHostConfiguration(configHost =>
{
// 配置根目录
configHost.SetBasePath(Path.GetDirectoryName(typeof(Program).Assembly.Location));
// 读取环境变量,Asp.Net core默认的环境变量是以ASPNETCORE_作为前缀的,这里也采用此前缀以保持一致
configHost.AddEnvironmentVariables("ASPNETCORE_");
// 读取启动host的时候之前可传入参数
configHost.AddCommandLine(args);
})
.ConfigureAppConfiguration((hostContext, configApp) =>
{
// 读取应用的配置json
configApp.AddJsonFile("appsettings.json", true);
// 读取应用特定环境下的配置json
configApp.AddJsonFile($"appsettings.{hostContext.HostingEnvironment.EnvironmentName}.json", true);
// 读取环境变量
configApp.AddEnvironmentVariables();
})
.ConfigureServices((hostContext, services) =>
{
// 添加日志Service
services.AddLogging();
// 设置efcore连接字符串
services.AddDbContext<EFContext>(options => options.UseSqlite(hostContext.Configuration.GetConnectionString("demoConnection")));
services.AddSingleton<IJobFactory, JobFactory>();
services.AddSingleton(provider =>
{
StdSchedulerFactory factory = new StdSchedulerFactory();
var scheduler = factory.GetScheduler().ConfigureAwait(false).GetAwaiter().GetResult();
scheduler.JobFactory = provider.GetService<IJobFactory>();
return scheduler;
});
// 添加自定义的HostedService
services.AddHostedService<DBHostedService>();
services.AddHostedService<QuartzHostedService>();
services.AddSingleton<TestJob, TestJob>();
})
.ConfigureLogging((hostContext, configLogging) =>
{
// 输出控制台日志
configLogging.AddConsole();
// 输出Debug日志
configLogging.AddDebug();
})
// 使用控制台生命周期
.UseConsoleLifetime()
.Build();
await host.RunAsync();
}
}
Job
前
查看详细内容
public class SpiderJob : IJob
{
public async Task Execute(IJobExecutionContext context)
{
using (var ctx = new EfContext())
{
var list = await ctx.Goods.AsNoTracking().ToListAsync();
}
}
}
后
查看详细内容
public class TestJob : IJob
{
private readonly ILogger _logger;
private readonly IConfiguration _config;
private readonly EFContext _context;
public TestJob(ILogger<TestJob> logger, IConfiguration config, EFContext context)
{
_logger = logger;
_config = config;
_context = context;
}
public async Task Execute(IJobExecutionContext context)
{
_logger.LogInformation(string.Format("[{0:yyyy-MM-dd hh:mm:ss:ffffff}]任务执行!", DateTime.Now));
// 读取配置
Console.WriteLine($"读取配置{ _config["test"] }");
// 读取数据库
var model = await _context.QuartInfo.FirstOrDefaultAsync();
if (model != null)
{
Console.WriteLine($"读取数据库 { model.jobName }");
}
}
}