sharepoint - 在具有多个 WFE 的服务器场环境中部署计时器作业的最佳实践

Question

我有一个定时器工作，我想每天只运行一次，用于整个农场。我如何能

1. 在多 WFE 环境中部署它？我是在每个 WFE 中运行 stsadm -o deploysolution 命令，还是只在我想运行的地方运行它？
2. 我应该在哪里激活该功能？是否应该仅从特定的 WFE 激活？
3. SPJobLockType 的值应该是多少。

Answer 1

看起来您需要一个农场范围的功能，它安装一个运行此作业的服务。这是我的做法（老实说，使用同事编写的代码，但他不在 SO 中）。

使用功能事件接收器创建一个 feature.xml 文件。

<Feature
  Id="..."
  Title="..."
  Description="..."
  Scope="Farm"
  Version="1.0.0.0"
  Hidden="FALSE"
  ReceiverAssembly="XXX.FarmService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=xxx"
  ReceiverClass="XXX.FarmService.XXXFarmFeatureEventReceiver"
  xmlns="http://schemas.microsoft.com/sharepoint/">
</Feature>

在事件接收器内部：

public override void OnFeatureActivated(SPFeatureReceiverProperties properties)
    {
        try
        {
            SPFarm farm = SPFarm.Local;

            // Get Service, if it already exists
            JobService myService = null; // JobService is a subclass of SPService
            foreach (SPService service in farm.Services)
            {
                if (String.Compare(service.Name, JobService.XXXServiceName, true) == 0)
                {
                    myService = (service as JobService);
                    break;
                    }
                }

                if (cegService == null)
                {
                    // Create service
                    myService = new JobService(farm);
                    myService.Update();

                    // Create service instances
                    JobServiceInstance myServiceInstance; // JobServiceInstance is a subclas of SPServiceInstance
                    foreach (SPServer server in farm.Servers)
                    {
                        myServiceInstance = new JobServiceInstance(server, myService);
                        myServiceInstance.Update();
                    }
                }

                // Dayly schedule 
                SPDailySchedule schedule = new SPDailySchedule();
                schedule.BeginHour = 1;
                schedule.EndHour = 1;
                schedule.BeginMinute = 0;
                schedule.EndMinute = 59;

                // Our own job; JobCheckDocDates is a subclass of SPJobDefinition
                JobCheckDocDates newJob = new JobCheckDocDates(cegService, null, SPJobLockType.Job);
                newJob.Schedule = schedule;
                newJob.Update();
                myService.JobDefinitions.Add(newJob);
                myService.Update();
            }
            catch (Exception e)
            {
                Logger.Error("[" + properties.Feature.Definition.DisplayName + "] Error during feature activation", e);
            }
        }        

这会在场中的每台服务器上创建一个可用的服务。

有关子类的更多详细信息：

public class JobCheckDocDates: Common.BaseJob
{
    /// <summary>
    /// The job name
    /// </summary>
    public static string JobName = "XXX job";

    /// <summary>
    /// Constructor
    /// </summary>
    public JobCheckDocDates() : base() { }

    /// <summary>
    /// Constructor
    /// </summary>
    /// <param name="service"></param>
    /// <param name="server"></param>
    /// <param name="lockType"></param>
    public JobCheckDocDates(SPService service, SPServer server, SPJobLockType lockType)
            : base(JobName, service, server, lockType) { }

...

当然还有 Execute 方法。

public class JobService : SPService 
{
    public static string XXXServiceName = "XXX Service";

    public override string DisplayName
    {
        get
        {
            return XXXServiceName;
        }
    }

    public override string TypeName
    {
        get
        {
            return "XXX Service Type";
        }
    }

    /* An empty public constructor required for serialization. */
    public JobService() { }

    public JobService(SPFarm farm)
          : base(XXXServiceName, farm)
    {         
    }
}


    public class JobServiceInstance : SPServiceInstance
    {
        /// <summary>
        /// Eos Service Instance Name
        /// </summary>
        public static string XXXServiceInstanceName = "XXXServiceInstance";

        /// <summary>
        /// Manage Link
        /// </summary>
        private SPActionLink _manageLink;

        /// <summary>
        /// Provision Link
        /// </summary>
        private SPActionLink _provisionLink;

        /// <summary>
        /// Unprovision Link
        /// </summary>
        private SPActionLink _unprovisionLink;

        /// <summary>
        /// Roles
        /// </summary>
        private ICollection<string> _roles;

        /// <summary>
        /// Manage Link
        /// </summary>
        public override SPActionLink ManageLink
        {
            get
            {
                if (_manageLink == null)
                {
                    _manageLink = new SPActionLink(SPActionLinkType.None);
                }
                return _manageLink;
            }
        }

        /// <summary>
        /// Provision Link
        /// </summary>
        public override SPActionLink ProvisionLink
        {
            get
            {
                if (_provisionLink == null)
                {
                    _provisionLink = new SPActionLink(SPActionLinkType.ObjectModel);
                }
                return _provisionLink;
            }
        }

        /// <summary>
        /// Unprovision Link
        /// </summary>
        public override SPActionLink UnprovisionLink
        {
            get
            {
                if (_unprovisionLink == null)
                {
                    _unprovisionLink = new SPActionLink(SPActionLinkType.ObjectModel);
                }
                return _unprovisionLink;
            }
        }

        /// <summary>
        /// Roles
        /// </summary>
        public override ICollection<string> Roles
        {
            get
            {
                if (_roles == null)
                {
                    _roles = new string[1] { "Custom" };
                }
                return _roles;
            }
        }

        /// <summary>
        /// Empty constructor
        /// </summary>
        public JobServiceInstance() : base() { }

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="server">The server</param>
        /// <param name="service">The Eos service</param>
        public JobServiceInstance(SPServer server, JobService service)
            : base(XXXServiceInstanceName, server, service)
        {
        }

现在，在 Central Admin 中，转到服务器上的操作/服务。选择所需的服务器并启动服务。

要回答您的问题列表： 1. 只需部署一次解决方案，独立于 WFE。2. 由于该功能是场范围的，因此应在 Central Admin 中激活。3. SPJobLockType 是 SPJobLockType.Job

这与您想象的不完全一样，但它的优点是可以让您轻松选择作业的运行位置，即使在您安装了该功能很久之后（例如，如果服务器因其他东西而过载）。

OnFeatureActivated 方法可以更智能，并检查每个服务器是否存在服务并在需要时添加它。但是从 OnFeatureDeactivated 中的每个服务中删除该服务更简单。因此，如果您添加新服务器，请停用然后重新激活该功能。