将属性注入 QuartzJobObject

Question

我是否正确地认为我的 QuartzJobObject 不能注入任何 DAO 或其他 Spring 管理的对象？

希望我可以做这样的事情（orderService 是我想要注入的）：

<object name="checkPendingOrdersJob" type="Spring.Scheduling.Quartz.JobDetailObject, Spring.Scheduling.Quartz">
  <property name="JobType" value="Munch.ScheduledTasks.CheckPendingOrdersJob" />
  <!-- We can inject values through JobDataMap -->
  <property name="JobDataAsMap">
    <dictionary>
      <!--entry key="UserName" value="Alexandre" /-->
    </dictionary>      
  </property>
  <property name="orderService" ref="orderService"/>
</object>

...我知道由于它的类型而没有意义。但是，我可以通过某种方式注入一些 DAO、服务等。但我无法弄清楚。我该怎么做？

Answer 1

这就是我最终得到的结果，它工作得很好（希望对其他人有用）

了解 Spring 上下文的作业工厂

/// <summary>
/// A custom job factory that is aware of the spring context
/// </summary>
public class ContextAwareJobFactory : AdaptableJobFactory, IApplicationContextAware
{
    /// <summary>
    /// The spring app context
    /// </summary>
    private IApplicationContext m_Context;

    /// <summary>
    /// Set the context
    /// </summary>
    public IApplicationContext ApplicationContext
    {
        set
        {
            m_Context = value;
        }
    }

    /// <summary>
    /// Overrides the default version and sets the context
    /// </summary>
    /// <param name="bundle"></param>
    /// <returns></returns>
    protected override object CreateJobInstance(TriggerFiredBundle bundle)
    {
        return m_Context.GetObject(bundle.JobDetail.JobType.Name, bundle.JobDetail.JobType);
    }
}

作业本身（检查数据库中的情况）记录，如果至少有 HomeManyMenuItemsIsOK 个，则一切都很好）。注意：menuService 是一个注入的 spring 管理对象，它本身有几个 DAO）。 HowManyMenuItemsIsOK 是通过作业数据映射传入的静态属性。

public class CheckMenuIsHealthyJob : QuartzJobObject 
{
    private static readonly ILog log = LogManager.GetLogger(typeof(CheckMenuIsHealthyJob));

    public IMenuService menuService { get; set; }
    public int HowManyMenuItemsIsOK { get; set; }

    /// <summary>
    /// Check how healthy the menu is by seeing how many menu items are stored in the database. If there
    /// are more than 'HowManyMenuItemsIsOK' then we're ok.
    /// </summary>
    /// <param name="context"></param>
    protected override void ExecuteInternal(JobExecutionContext context)
    {
        IList<MenuItem> items = menuService.GetAllMenuItems();
        if (items != null && items.Count >= HowManyMenuItemsIsOK)
        {
            log.Debug("There are " + items.Count + " menu items. Menu is healthy!");
        }
        else
        {
            log.Warn("Menu needs some menu items adding!");
        }

    }
}

最后是 Spring 配置

<!-- Scheduled Services using Quartz -->
  <!-- This section contains Quartz config that can be reused by all our Scheduled Tasks ---->  
  <!-- The Quartz scheduler factory -->
  <object id="quartzSchedulerFactory" type="Spring.Scheduling.Quartz.SchedulerFactoryObject, Spring.Scheduling.Quartz">
    <!-- Tell Quartz to use our custom (context-aware) job factory -->
    <property name="JobFactory" ref="contextAwareJobFactory"/>

    <!-- Register the triggers -->
    <property name="triggers">
      <list>
        <ref object="frequentTrigger" />
      </list>
    </property>
  </object>  

  <!-- Funky new context-aware job factory -->
  <object name="contextAwareJobFactory" type="Munch.Service.ScheduledTasks.ContextAwareJobFactory" />

  <!-- A trigger that fires every 10 seconds (can be reused by any jobs that want to fire every 10 seconds) -->
  <object id="frequentTrigger" type="Spring.Scheduling.Quartz.CronTriggerObject, Spring.Scheduling.Quartz" lazy-init="true">
    <property name="jobDetail" ref="checkMenuIsHealthyJobDetail" />
    <property name="cronExpressionString" value="0/10 * * * * ?" />
  </object>  

  <!-- Now the job-specific stuff (two object definitions per job; 1) the job and 2) the job detail) --> 
  <!-- Configuration for the 'check menu is healthy job' -->
  <!-- 1) The job -->
  <object name="checkMenuIsHealthyJob" type="Munch.Service.ScheduledTasks.CheckMenuIsHealthyJob" singleton="false">
    <property name="menuService" ref="menuService"/>
  </object>

  <!-- 2) The job detail -->
  <object name="checkMenuIsHealthyJobDetail" type="Spring.Scheduling.Quartz.JobDetailObject, Spring.Scheduling.Quartz">
    <property name="JobType" value="Munch.Service.ScheduledTasks.CheckMenuIsHealthyJob"/>
    <property name="JobDataAsMap">
      <dictionary>
        <entry key="HowManyMenuItemsIsOK" value="20" />
      </dictionary>
    </property>    
  </object>

Answer 2

您可以通过覆盖 CreateJobInstance 来将属性/构造函数注入到您的作业中
AdaptableJobFactory 并注册新的 JobFactory 而不是默认的 JobFactory。

传入的 TriggerFiredBundle 为您提供了足够的信息来向上下文请求匹配的作业（基于约定）。 bundle.JobDetail.JobType.Name 和 bundle.JobDetail.JobType 满足了我的需求，所以早在 2008 年我就得到了一些东西。像这样（该类是从 AdaptableJobFactory 派生的，并实现 IApplicationContextAware 来注入上下文）：

public class ContextAwareJobFactory : AdaptableJobFactory, IApplicationContextAware
{
  private IApplicationContext m_Context;

  public IApplicationContext ApplicationContext
  {
    set
    {
      m_Context = value;
    }
  }

  protected override object CreateJobInstance( TriggerFiredBundle bundle )
  {
    return m_Context.GetObject( bundle.JobDetail.JobType.Name, bundle.JobDetail.JobType );
  }
}

您需要使用以下配置注册 ContextAwareJobFactory：

<objects xmlns="http://www.springframework.net">
  <!-- Some simple dependency -->
  <object name="SomeDependency" type="Namespace.SomeDependency, Assembly" />

  <!-- The scheduled job, gets the dependency. -->
  <object name="ExampleJob" type="Namespace.ExampleJob, Assembly" singleton="false">
    <constructor-arg name="dependency" ref="SomeDependency"/>
  </object>

  <!-- The JobDetail is configured as usual. -->
  <object name="ExampleJobDetail" type="Spring.Scheduling.Quartz.JobDetailObject, Spring.Scheduling.Quartz">
    <property name="JobType" value="Namespace.ExampleJob, Assembly"/>        
  </object>

  <!-- The new JobFactory. -->
  <object name="ContextAwareJobFactory" type="Namespace.ContextAwareJobFactory, Assembly" />

  <!-- Set the new JobFactory onto the scheduler factory. -->
  <object id="quartzSchedulerFactory" type="Spring.Scheduling.Quartz.SchedulerFactoryObject, Spring.Scheduling.Quartz">
    <property name="JobFactory" ref="ContextAwareJobFactory"/>
  </object>      
</objects>

我不知道是否有某事。 ootb 因为它是在 2008 年开发的，所以我没有关注quartz.net 的集成进度。