public void Execute(IJobExecutionContext context)
{
try
{
JobInfo jobInfo = context.JobDetail.JobDataMap.Get("jobInfo") as JobInfo ?? new JobInfo();
//从job池中查找逻辑job
JobRuntimeInfo jobRuntimeInfo = SchedulerManager.Singleton.GetJobFromPool(jobInfo.Id);
try
{
if (jobRuntimeInfo != null)
{
try
{
bool runRes = jobRuntimeInfo.Job.Run();
if (runRes == false)
{
Exception ex = new Exception("作业内部发生异常");
LogWriter.WriteLog(ex, $"作业名称 : {jobInfo.JobName}");
}
}
//如果因为某种原因 appdomain 被卸载会进入catch块,重新创建 appdomain
catch (AppDomainUnloadedException ex)
{
LogWriter.WriteLog(ex, "appdomain 被卸载,准备重新加载");
SchedulerManager.Singleton.ReplaceJobRuntimeInfo(jobRuntimeInfo);
}
}
//如果job池没有该job
//TODO:注意,逻辑走到这里一般都是宕机了,因为job池是在内存中,所以重启调度服务后,肯定是没有的.而jobDetail和trigger是在数据库中,用的是官方的持久化方案.
else
{
try
{
bool creRes = SchedulerManager.Singleton.CreateJob(jobInfo);
//重新创建job成功后,需要手动执行一次.
if (creRes == true)
{
jobRuntimeInfo = SchedulerManager.Singleton.GetJobFromPool(jobInfo.Id);
jobRuntimeInfo.Job.Run();
}
}
catch (Exception ex)
{
LogWriter.WriteLog(ex, $"重新创建job失败:{JsonConvert.SerializeObject(jobInfo)}");
}
}
}
catch (Exception ex)
{
//写日志，job调用失败,或者job执行的wcf程序抛出异常
LogWriter.WriteLog(ex, $"job执行失败 : {JsonConvert.SerializeObject(jobInfo)}");
}
}
catch (Exception ex)
{
//TODO:调用的时候失败属于系统级错误,非常重要,写日志!
LogWriter.WriteLog(ex, $"系统级错误,{nameof(Execute)}");
}
}
/// <summary>
/// 更换版本
/// </summary>
/// <param name="jobInfo"></param>
/// <returns></returns>
public bool Upgrade(JobInfo jobInfo)
{
lock (Locker)
{
Remove(jobInfo);
JobRuntimeInfo jobRuntimeInfo = CreateJobRuntimeInfo(jobInfo);
return(Add(jobRuntimeInfo));
}
}
/// <summary>
/// 恢复job
/// </summary>
/// <param name="jobInfo"></param>
public bool Resume(JobInfo jobInfo)
{
//TODO:这里有两种可能
/*
* 1.调度服务正常状态时恢复
* 2.调度服务挂了,重启之后,恢复job.这种情况,job池是没有job的.但是jobDetail和trigger是有的,因为我们采用的是持久化调度器,因此要特殊处理.很重要
*
*/
lock (Locker)
{
//这是第2种情况,job池没有job,属于暂停后,宕机
JobRuntimeInfo jobRuntimeInfo = null;
if (!JobPool.ContainsKey(jobInfo.Id))
{
//如果调度任务中没有该jobDetail,那么直接返回
IJobDetail jobDetail = GetJobDetail(jobInfo, out JobKey jobKey);
if (jobDetail == null)
{
return(false);
}
jobRuntimeInfo = CreateJobRuntimeInfo(jobInfo);
//如果该job实例添加失败,卸载appdomain,然后返回.
if (!JobPool.TryAdd(jobInfo.Id, jobRuntimeInfo))
{
AppDomainLoader.UnLoad(jobRuntimeInfo.AppDomain);
return(false);
}
else
{
//添加成功后,和下面那种情况一起操作了.
}
}
//job池有job,这属于正常恢复,走下面的逻辑.
//如果调度任务中没有该jobDetail 的 trigger,那么直接返回
ITrigger trigger = GetTrigger(jobInfo, out TriggerKey triKey);
if (trigger == null)
{
return(false);
}
Scheduler.ResumeTrigger(triKey).Wait();
return(true);
//TODO:记录日志
}
}
/// <summary>
/// job池没有该job时,创建 job,并开始调度
/// TODO:注意,虽然job池没有该job,但是trigger和jobDetail是有的
/// </summary>
/// <param name="jobInfo"></param>
public bool CreateJob(JobInfo jobInfo)
{
if (jobInfo == null)
{
return(false);
}
if (JobPool.ContainsKey(jobInfo.Id))
{
return(false);
}
lock (Locker)
{
if (JobPool.ContainsKey(jobInfo.Id))
{
return(false);
}
JobRuntimeInfo jobRuntimeInfo = CreateJobRuntimeInfo(jobInfo);
return(Add(jobRuntimeInfo));
}
}
/// <summary>
/// 创建新的应用程序域,返回运行时的Job数据
/// </summary>
/// <param name="jobInfo"></param>
internal JobRuntimeInfo CreateJobRuntimeInfo(JobInfo jobInfo)
{
lock (Locker)
{
//JobRuntimeInfo jobRuntimeInfo = null;
//if (JobPool.ContainsKey(jobInfo.Id))
//{
// jobRuntimeInfo = GetJobFromPool(jobInfo.Id);
// return jobRuntimeInfo;
//}
AppDomain app = Thread.GetDomain();
BaseJob.BaseJob job = AppDomainLoader.Load(jobInfo.AssemblyPath, jobInfo.ClassType, out app);
JobRuntimeInfo jobRuntimeInfo = new JobRuntimeInfo
{
JobInfo = jobInfo,
Job = job,
AppDomain = app,
};
//TODO:日志记录
return(jobRuntimeInfo);
}
}
/// <summary>
/// 线程池有job,但是该job的应用程序域已经卸载(一般都是宕机),替换job池中的jobRuntimeInfo,并重新调度该job
/// </summary>
/// <param name="jobRuntimeInfo"></param>
/// <returns></returns>
internal bool ReplaceJobRuntimeInfo(JobRuntimeInfo jobRuntimeInfo)
{
//TODO:有BUG,没有地方还原 _flag 的值
//if (_flag)
//{
// return true;
//}
lock (Locker)
{
//if (_flag)
//{
// return true;
//}
AppDomain app = Thread.GetDomain();
jobRuntimeInfo.Job = AppDomainLoader.Load(jobRuntimeInfo.JobInfo.AssemblyPath, jobRuntimeInfo.JobInfo.ClassType, out app);
jobRuntimeInfo.AppDomain = app;
JobPool[jobRuntimeInfo.JobInfo.Id] = jobRuntimeInfo;
//_flag = true;
return(true);
}
}
/// <summary>
/// 添加job到job池,同时加入到调度任务中.
/// </summary>
/// <param name="jobRuntimeInfo"></param>
/// <returns></returns>
internal bool Add(JobRuntimeInfo jobRuntimeInfo)
{
lock (Locker)
{
try
{
//如果该job实例添加失败,卸载该job的appdomain,然后返回.
if (!JobPool.TryAdd(jobRuntimeInfo.JobInfo.Id, jobRuntimeInfo))
{
AppDomainLoader.UnLoad(jobRuntimeInfo.AppDomain);
return(false);
}
//如果调度任务中已经有该jobDetail,则直接删掉
IJobDetail jobDetail = GetJobDetail(jobRuntimeInfo.JobInfo, out JobKey jobKey);
if (jobDetail != null)
{
Scheduler.DeleteJob(jobKey).Wait();
}
jobDetail = CreateJobDetail(jobRuntimeInfo.JobInfo);
ITrigger trigger = CreateTrigger(jobRuntimeInfo.JobInfo);
Scheduler.ScheduleJob(jobDetail, trigger).Wait();
//TODO:记录日志
return(true);
}
catch (Exception ex)
{
//异常了,直接从job池移除该job,不再考虑移除失败的情况.考虑不到那么多了
if (JobPool.TryRemove(jobRuntimeInfo.JobInfo.Id, out JobRuntimeInfo jri))
{
//成功移除后,再卸载掉应用程序域,失败则不移除,保留.
AppDomainLoader.UnLoad(jobRuntimeInfo.AppDomain);
}
throw ex;
}
}
}