private bool QueueNextNonScheduledReadyJob(int?queueId, out JobData jobData)
{
jobData = null;
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
try
{
//In order to get a table lock, we have to resort to SQL
string queueQueryString = string.Empty;
if (queueId.HasValue)
{
queueQueryString = string.Format(" AND QueueId = {0} ", queueId.Value);
}
string queryString = string.Format("SELECT TOP 1 * FROM BackgroundWorkerJobs WITH (TABLOCKX) WHERE (ScheduleType IS NULL OR ScheduleType = '') AND StatusId = {0}{1} ORDER BY [CreatedDate] Asc", "{0}", queueQueryString);
var storedJob = context.ExecuteQuery <BackgroundWorkerJob>(queryString, (int)JobStatus.Ready).FirstOrDefault();
if (storedJob != null && storedJob.StatusId == (int)JobStatus.Ready)
{
Debug.WriteLine(string.Format("L2SQL : Queueing job {0}", storedJob.Id));
storedJob.StatusId = (int)JobStatus.Queuing;
storedJob.Instance = settings.InstanceName;
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
Type jobType = Type.GetType(storedJob.Type);
if (jobType != null)
{
Debug.WriteLine(string.Format("L2SQL : Queued job {0}", storedJob.Id));
jobData = GetJobData(storedJob);
}
else
{
storedJob.StatusId = (int)JobStatus.Deleted;
storedJob.LastErrorMessage = string.Format("Could not load type '{0}.'", storedJob.Type);
context.SubmitChanges();
}
if (jobType == null)
{
return(false);
}
}
}
finally
{
ts.Complete();
}
}
}
return(true);
}
public bool DeleteAlerts(long[] ids = null)
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
try
{
var storedAlertsQuery = context.BackgroundWorkerAlerts.AsQueryable();
if (ids != null)
{
storedAlertsQuery = storedAlertsQuery.Where(a => ids.Contains(a.Id));
}
var storedAlerts = storedAlertsQuery.ToList();
if (storedAlerts != null && storedAlerts.Count > 0)
{
context.BackgroundWorkerAlerts.DeleteAllOnSubmit(storedAlerts);
context.SubmitChanges(ConflictMode.FailOnFirstConflict);
}
return(true);
}
catch (Exception ex)
{
logger.Error("DeleteAlerts failed.", ex);
}
}
return(false);
}
public Alert CreateAlert(long jobId, long?jobHistoryId, string message)
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
try
{
BackgroundWorkerAlert alert = new BackgroundWorkerAlert {
JobId = jobId, JobHistoryId = jobHistoryId, Message = message
};
context.BackgroundWorkerAlerts.InsertOnSubmit(alert);
context.SubmitChanges();
return(new Alert
{
Id = alert.Id,
JobId = alert.JobId,
JobHistoryId = alert.JobHistoryId,
Message = alert.Message,
});
}
catch (Exception ex)
{
logger.Error("CreateAlert failed.", ex);
}
}
return(null);
}
public void DequeueJob(JobData job)
{
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable, Timeout = transactionTimeout
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
try
{
//In order to get a table lock, we have to resort to SQL
var storedJob = context.ExecuteQuery <BackgroundWorkerJob>("SELECT TOP 1 * FROM BackgroundWorkerJobs WITH (ROWLOCK, XLOCK) WHERE Id = {0}", job.Id).FirstOrDefault();
if (storedJob != null && (storedJob.StatusId == (int)JobStatus.Queuing || storedJob.StatusId == (int)JobStatus.Queued))
{
storedJob.StatusId = (int)JobStatus.Ready;
storedJob.Instance = null;
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
ts.Complete();
return;
}
}
catch (Exception ex)
{
logger.Error("DequeueJob failed.", ex);
}
}
}
}
public JobExecutionHistory CreateJobExecutionHistory(JobData job)
{
BackgroundWorkerJobExecutionHistory history = new BackgroundWorkerJobExecutionHistory
{
AbsoluteTimeout = job.AbsoluteTimeout,
CreatedDate = job.CreatedDate,
Instance = job.Instance,
JobUniqueId = job.UniqueId,
Data = job.Data,
EndDateTime = job.LastEndTime,
ErrorMessage = job.LastErrorMessage,
JobId = job.Id,
MetaData = job.MetaData,
QueueId = job.QueueId,
StartDateTime = job.LastStartTime ?? DateTime.Now,
StatusId = (int)job.Status,
Success = job.Status == JobStatus.Done,
Type = job.JobType.AssemblyQualifiedName,
Application = job.Application,
Group = job.Group,
Name = job.Name,
Description = job.Description,
};
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
context.BackgroundWorkerJobExecutionHistories.InsertOnSubmit(history);
try
{
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
return(new JobExecutionHistory
{
AbsoluteTimeout = history.AbsoluteTimeout,
Application = history.Application,
CreatedDate = history.CreatedDate,
Data = history.Data,
Description = history.Description,
EndTime = history.EndDateTime,
ErrorMessage = history.ErrorMessage,
Group = history.Group,
Id = history.Id,
Instance = history.Instance,
JobId = history.JobId,
JobType = Type.GetType(history.Type),
JobUniqueId = history.JobUniqueId,
MetaData = history.MetaData,
Name = history.Name,
QueueId = history.QueueId,
StartTime = history.StartDateTime,
Status = (JobStatus)history.StatusId,
Success = history.Success ?? false,
});
}
catch (Exception ex)
{
logger.Error(string.Format("Failed to submit changes to the database."), ex);
}
}
return(null);
}
public bool DeleteJob(long jobId, bool deleteHistory = false)
{
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable, Timeout = transactionTimeout
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
var job = context.BackgroundWorkerJobs.FirstOrDefault(j => j.Id == jobId);
if (job != null)
{
if (deleteHistory)
{
context.BackgroundWorkerJobExecutionHistories.DeleteAllOnSubmit(context.BackgroundWorkerJobExecutionHistories.Where(jh => jh.JobId == jobId));
}
context.BackgroundWorkerJobs.DeleteOnSubmit(job);
try
{
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
ts.Complete();
return(true);
}
catch (Exception ex)
{
logger.Error(string.Format("Failed to delete job '{0}'.", jobId), ex);
}
}
}
}
return(false);
}
/// <summary>
/// Schedules (create with schedule) the job in the job store.
/// </summary>
/// <param name="jobType">Type of the job.</param>
/// <param name="data">The data.</param>
/// <param name="metaData">The meta data.</param>
/// <param name="queueId">The queue id.</param>
/// <param name="schedule">The schedule.</param>
/// <param name="name">The name.</param>
/// <param name="description">The description.</param>
/// <param name="application">The application.</param>
/// <param name="group">The group.</param>
/// <param name="absoluteTimeout">The absolute timeout.</param>
/// <param name="jobStatus">The job status.</param>
/// <param name="createdDate">The created date. Jobs are ordered by creation date for execution so it's possible to prioritize jobs for queueing.</param>
/// <param name="suppressHistory">if set to <c>true</c> no execution history records are created.</param>
/// <param name="deleteWhenDone">if set to <c>true</c> the job is deleted after a successfull (status Done) execution.</param>
/// <returns></returns>
public JobData ScheduleJob(Type jobType, string data, string metaData, byte queueId, ISchedule schedule, string name = null, string description = null, string application = null, string group = null, TimeSpan?absoluteTimeout = null, JobStatus?jobStatus = JobStatus.Ready, DateTime?createdDate = null, bool suppressHistory = false, bool deleteWhenDone = false)
{
if (jobType == null)
{
throw new ArgumentException("jobType cannot be null.");
}
BackgroundWorkerJob newJob = new BackgroundWorkerJob
{
AbsoluteTimeout = absoluteTimeout,
CreatedDate = DateTime.Now,
Data = data,
MetaData = metaData,
QueueId = queueId,
StatusId = (int?)jobStatus ?? (int)JobStatus.Ready,
Type = jobType.AssemblyQualifiedName,
ScheduleType = schedule.GetType().AssemblyQualifiedName,
Schedule = Utils.SerializeObject(schedule, schedule.GetType()),
Instance = null, //This is just a default to show that no instance has picked this up
Application = application,
Group = group,
Name = name,
Description = description,
SuppressHistory = suppressHistory,
DeleteWhenDone = deleteWhenDone,
};
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
//In order to get a table lock, we have to resort to SQL
context.ExecuteQuery <BackgroundWorkerJob>("SELECT TOP 1 * FROM BackgroundWorkerJobs").FirstOrDefault();
context.BackgroundWorkerJobs.InsertOnSubmit(newJob);
try
{
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
JobData job = GetJobData(newJob);
jobsRequiringAction.Add(job);
return(job);
}
catch (Exception ex)
{
logger.LogException(string.Format("Failed to create '{0}' with data '{1}'", jobType.AssemblyQualifiedName, data), ex);
}
finally
{
ts.Complete();
}
}
}
return(null);
}
/// <summary>
/// Updates the job with the new values.
/// </summary>
/// <param name="job">The job.</param>
/// <param name="triggerJobActionRequired">if set to <c>true</c>, cause <see cref="JobActionRequired"/> event to be raised.</param>
/// <returns></returns>
public bool UpdateJob(JobData job, bool triggerJobActionRequired = false)
{
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
//In order to get a table lock, we have to resort to SQL
var storedJob = context.ExecuteQuery <BackgroundWorkerJob>("SELECT TOP 1 * FROM BackgroundWorkerJobs WITH (TABLOCKX) WHERE Id = {0}", job.Id).FirstOrDefault();
if (storedJob != null)
{
storedJob.AbsoluteTimeout = job.AbsoluteTimeout;
storedJob.CreatedDate = job.CreatedDate;
storedJob.Data = job.Data;
storedJob.Instance = job.Instance;
storedJob.LastErrorMessage = job.LastErrorMessage;
storedJob.LastExecutionEndDateTime = job.LastEndTime;
storedJob.LastExecutionStartDateTime = job.LastStartTime;
storedJob.MetaData = job.MetaData;
storedJob.QueueId = job.QueueId;
storedJob.StatusId = (int)job.Status;
storedJob.Application = job.Application;
storedJob.Group = job.Group;
storedJob.SuppressHistory = job.SuppressHistory;
storedJob.DeleteWhenDone = job.DeleteWhenDone;
if (job.Schedule != null)
{
storedJob.ScheduleType = job.Schedule.GetType().AssemblyQualifiedName;
storedJob.Schedule = Utils.SerializeObject(job.Schedule, job.Schedule.GetType());
}
try
{
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
if (triggerJobActionRequired)
{
jobsRequiringAction.Add(GetJobData(storedJob));
}
return(true);
}
catch (Exception ex)
{
logger.LogException(string.Format("Failed to submit changes to the database."), ex);
}
finally
{
ts.Complete();
}
return(false);
}
}
}
return(false);
}
public JobData CreateJob(Type jobType, string data, string metaData, byte queueId, ISchedule schedule = null, Guid?uniqueId = null, string name = null, string description = null, string application = null, string group = null, TimeSpan?absoluteTimeout = null, JobStatus?jobStatus = null, DateTime?createdDate = null, bool suppressHistory = false, bool deleteWhenDone = false)
{
if (jobType == null)
{
throw new ArgumentException("jobType cannot be null.");
}
BackgroundWorkerJob newJob = new BackgroundWorkerJob
{
UniqueId = uniqueId ?? Guid.NewGuid(),
AbsoluteTimeout = absoluteTimeout,
CreatedDate = DateTime.Now,
Data = data,
MetaData = metaData,
QueueId = queueId,
StatusId = (int?)jobStatus ?? (schedule == null ? (int)JobStatus.Ready : (int)JobStatus.Scheduled),
Type = jobType.AssemblyQualifiedName,
ScheduleType = schedule != null?schedule.GetType().AssemblyQualifiedName : null,
Schedule = schedule != null?Utils.SerializeObject(schedule, schedule.GetType()) : null,
Instance = null, //This is just a default to show that no instance has picked this up
Application = application,
Group = group,
Name = name,
Description = description,
SuppressHistory = suppressHistory,
DeleteWhenDone = deleteWhenDone,
NextExecutionStartDateTime = (schedule != null ? schedule.GetNextOccurrence() : null),
};
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable, Timeout = transactionTimeout
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
context.BackgroundWorkerJobs.InsertOnSubmit(newJob);
try
{
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
ts.Complete();
JobData job = GetJobData(newJob);
return(job);
}
catch (Exception ex)
{
logger.Error(string.Format("Failed to create '{0}' with data '{1}'", jobType.AssemblyQualifiedName, data), ex);
}
}
}
return(null);
}
public ReadOnlyCollection <JobData> QueueReadyJobs(byte?queueId, uint take)
{
List <JobData> jobData = new List <JobData>();
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable, Timeout = transactionTimeout
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
try
{
//In order to get a table lock, we have to resort to SQL
string queueQueryString = string.Empty;
if (queueId.HasValue)
{
queueQueryString = string.Format(" AND QueueId = {0} ", queueId.Value);
}
string queryString = string.Format("SELECT TOP {2} * FROM BackgroundWorkerJobs WITH (ROWLOCK, XLOCK) WHERE StatusId = {0}{1} ORDER BY [LastExecutionStartDateTime] ASC", (int)JobStatus.Ready, queueQueryString, take);
var storedJobs = context.ExecuteQuery <BackgroundWorkerJob>(queryString).ToList();
foreach (var storedJob in storedJobs)
{
storedJob.StatusId = (int)JobStatus.Queuing;
storedJob.Instance = settings.InstanceName;
Type jobType = Type.GetType(storedJob.Type);
if (jobType != null)
{
jobData.Add(GetJobData(storedJob));
}
else
{
storedJob.StatusId = (int)JobStatus.Deleted;
storedJob.LastErrorMessage = string.Format("Could not load type '{0}.'", storedJob.Type);
}
}
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
ts.Complete();
}
catch (Exception ex)
{
logger.Error(string.Format("Failed to submit changes to the database."), ex);
}
}
}
return(jobData.AsReadOnly());
}
public bool SetJobStatuses(long[] jobIds, JobStatus?oldStatus, JobStatus newStatus, string errorMessage = null, string instance = "Not Specified")
{
if (jobIds == null || jobIds.Length == 0)
{
return(true);
}
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable, Timeout = transactionTimeout
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
try
{
//Unfortunately, can't use a single update statement here, as we need to know the exact records that were updated to trigger the requiresaction event.
var storedJobs = context.ExecuteQuery <BackgroundWorkerJob>(string.Format("SELECT * FROM BackgroundWorkerJobs WITH (ROWLOCK, XLOCK) WHERE Id IN ({0})", string.Join(",", jobIds))).ToList();
foreach (var storedJob in storedJobs)
{
if (oldStatus.HasValue ? storedJob.StatusId == (int)oldStatus.Value : true)
{
storedJob.StatusId = (int)newStatus;
if (errorMessage != null)
{
storedJob.LastErrorMessage = errorMessage;
}
if (instance != "Not Specified")
{
storedJob.Instance = instance;
}
}
}
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
ts.Complete();
return(true);
}
catch (Exception ex)
{
logger.Error(string.Format("Failed to submit changes to the database."), ex);
}
}
}
return(false);
}
/// <summary>
/// Tries to set the job status of the specified job.
/// </summary>
/// <param name="jobId">The job id.</param>
/// <param name="oldStatus">The old status. This is used to ensure that job status change is what the caller expects. Use null if you don't care what the current job status is.</param>
/// <param name="newStatus">The new status.</param>
/// <param name="errorMessage">The optional error message.</param>
/// <param name="metaData">The optional meta data.</param>
/// <returns></returns>
public bool SetJobStatus(long jobId, JobStatus?oldStatus, JobStatus newStatus, string errorMessage = null, string metaData = null)
{
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
try
{
//In order to get a table lock, we have to resort to SQL
var storedJob = context.ExecuteQuery <BackgroundWorkerJob>("SELECT TOP 1 * FROM BackgroundWorkerJobs WITH (TABLOCKX) WHERE Id = {0}", jobId).FirstOrDefault();
if (storedJob != null && (oldStatus.HasValue ? storedJob.StatusId == (int)oldStatus.Value : true))
{
storedJob.StatusId = (int)newStatus;
if (errorMessage != null)
{
storedJob.LastErrorMessage = errorMessage;
}
if (metaData != null)
{
storedJob.MetaData = metaData;
}
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
jobsRequiringAction.Add(GetJobData(storedJob));
return(true);
}
}
catch (Exception ex)
{
logger.LogException(string.Format("Failed to submit changes to the database."), ex);
}
finally
{
ts.Complete();
}
}
}
return(false);
}
/// <summary>
/// Deletes the job permanently from the job store.
/// </summary>
/// <param name="jobId">The job id.</param>
/// <param name="deleteHistory">If set to true, the history will also be deleted.</param>
/// <returns></returns>
public bool DeleteJob(long jobId, bool deleteHistory = false)
{
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
//In order to get a table lock, we have to resort to SQL
context.ExecuteQuery <BackgroundWorkerJob>("SELECT TOP 1 * FROM BackgroundWorkerJobs").FirstOrDefault();
var job = context.BackgroundWorkerJobs.FirstOrDefault(j => j.Id == jobId);
if (job != null)
{
if (deleteHistory)
{
context.BackgroundWorkerJobExecutionHistories.DeleteAllOnSubmit(context.BackgroundWorkerJobExecutionHistories.Where(jh => jh.JobId == jobId));
}
context.BackgroundWorkerJobs.DeleteOnSubmit(job);
try
{
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
return(true);
}
catch (Exception ex)
{
logger.LogException(string.Format("Failed to delete job '{0}'.", jobId), ex);
}
finally
{
ts.Complete();
deletedJobs.Add(GetJobData(job));
}
}
}
}
return(false);
}
public ReadOnlyCollection <JobExecutionHistory> GetJobExecutionHistories(uint skip = 0, uint take = 1, long[] jobHistoryIds = null, Guid[] jobUniqueIds = null, long[] jobIds = null, JobStatus[] jobStatuses = null, byte[] queueIds = null, string[] typeNames = null, string[] applications = null, string[] groups = null)
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
try
{
var query = context.BackgroundWorkerJobExecutionHistories.OrderByDescending(j => j.Id).AsQueryable();
if (jobHistoryIds != null && jobHistoryIds.Length > 0)
{
query = query.Where(j => jobHistoryIds.Contains(j.Id));
}
if (jobUniqueIds != null && jobUniqueIds.Length > 0)
{
query = query.Where(j => jobUniqueIds.Contains(j.JobUniqueId));
}
if (jobIds != null && jobIds.Length > 0)
{
query = query.Where(j => jobIds.Contains(j.JobId));
}
if (jobStatuses != null && jobStatuses.Length > 0)
{
query = query.Where(j => jobStatuses.Contains((JobStatus)j.StatusId));
}
if (queueIds != null && queueIds.Length > 0)
{
query = query.Where(j => queueIds.Select(q => (int)q).Contains(j.QueueId));
}
if (typeNames != null && typeNames.Length > 0)
{
query = query.Where(j => typeNames.Contains(j.Type));
}
if (applications != null && applications.Length > 0)
{
query = query.Where(j => applications.Contains(j.Application));
}
if (groups != null && groups.Length > 0)
{
query = query.Where(j => groups.Contains(j.Group));
}
List <JobExecutionHistory> jobHistories = new List <JobExecutionHistory>();
var storedJobHistories = query.Skip((int)skip).Take((int)take).ToList();
foreach (var storedJobHistory in storedJobHistories)
{
Type jobType = Type.GetType(storedJobHistory.Type);
if (jobType != null)
{
jobHistories.Add(new JobExecutionHistory
{
Id = storedJobHistory.Id,
JobId = storedJobHistory.JobId,
Success = storedJobHistory.Success ?? false,
AbsoluteTimeout = storedJobHistory.AbsoluteTimeout,
CreatedDate = storedJobHistory.CreatedDate,
Instance = storedJobHistory.Instance,
Data = storedJobHistory.Data,
EndTime = storedJobHistory.EndDateTime,
ErrorMessage = storedJobHistory.ErrorMessage,
MetaData = storedJobHistory.MetaData,
QueueId = storedJobHistory.QueueId,
StartTime = storedJobHistory.StartDateTime,
Status = (JobStatus)storedJobHistory.StatusId,
JobType = jobType,
Application = storedJobHistory.Application,
Group = storedJobHistory.Group,
Name = storedJobHistory.Name,
Description = storedJobHistory.Description,
JobUniqueId = storedJobHistory.JobUniqueId,
});
}
else
{
storedJobHistory.StatusId = (int)JobStatus.Deleted;
storedJobHistory.ErrorMessage = string.Format("Could not load type '{0}.'", storedJobHistory.Type);
context.SubmitChanges();
}
}
return(jobHistories.AsReadOnly());
}
catch (Exception ex)
{
logger.Error(string.Format("Failed to get job histories from the database."), ex);
}
}
return(null);
}
public ReadOnlyCollection <JobData> GetJobs(uint skip = 0, uint take = 1, Guid[] jobUniqueIds = null, long[] jobIds = null, JobStatus[] jobStatuses = null, byte[] queueIds = null, string[] typeNames = null, string[] applications = null, string[] groups = null)
{
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable, Timeout = transactionTimeout
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
try
{
//In order to get a table lock, we have to resort to SQL. Yeah, I said table lock. Want to get the real actual values here.
context.ExecuteQuery <BackgroundWorkerJob>("SELECT TOP 1 * FROM BackgroundWorkerJobs WITH (TABLOCKX)");
var query = context.BackgroundWorkerJobs.OrderBy(j => j.CreatedDate).AsQueryable();
if (jobUniqueIds != null && jobUniqueIds.Length > 0)
{
query = query.Where(j => jobUniqueIds.Contains(j.UniqueId));
}
if (jobIds != null && jobIds.Length > 0)
{
query = query.Where(j => jobIds.Contains(j.Id));
}
if (jobStatuses != null && jobStatuses.Length > 0)
{
query = query.Where(j => jobStatuses.Contains((JobStatus)j.StatusId));
}
if (queueIds != null && queueIds.Length > 0)
{
query = query.Where(j => queueIds.Select(q => (int)q).Contains(j.QueueId));
}
if (typeNames != null && typeNames.Length > 0)
{
query = query.Where(j => typeNames.Contains(j.Type));
}
if (applications != null && applications.Length > 0)
{
query = query.Where(j => applications.Contains(j.Application));
}
if (groups != null && groups.Length > 0)
{
query = query.Where(j => groups.Contains(j.Group));
}
List <JobData> jobs = new List <JobData>();
var storedJobs = query.Skip((int)skip).Take((int)take).ToList();
foreach (var storedJob in storedJobs)
{
Type jobType = Type.GetType(storedJob.Type);
if (jobType != null)
{
var jobData = GetJobData(storedJob);
jobs.Add(jobData);
}
else
{
storedJob.StatusId = (int)JobStatus.Deleted;
storedJob.LastErrorMessage = string.Format("Could not load type '{0}.'", storedJob.Type);
}
}
context.SubmitChanges();
ts.Complete();
return(jobs.AsReadOnly());
}
catch (Exception ex)
{
logger.Error(string.Format("Failed to get jobs from the database."), ex);
}
}
}
return(null);
}
public bool UpdateJob(JobData job)
{
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {
IsolationLevel = IsolationLevel.Serializable
}))
{
using (Linq2SqlJobStoreDalDataContext context = new Linq2SqlJobStoreDalDataContext(connectionString))
{
//If the record we're trying to update is locked (some other thread or service is writing to it), this will return false.
var storedJob = context.ExecuteQuery <BackgroundWorkerJob>("SELECT TOP 1 * FROM BackgroundWorkerJobs WITH (ROWLOCK, XLOCK) WHERE Id = {0}", job.Id).FirstOrDefault();
if (storedJob != null)
{
storedJob.AbsoluteTimeout = job.AbsoluteTimeout;
storedJob.CreatedDate = job.CreatedDate;
storedJob.Data = job.Data;
storedJob.Instance = job.Instance;
storedJob.LastErrorMessage = job.LastErrorMessage;
storedJob.LastExecutionEndDateTime = job.LastEndTime;
storedJob.LastExecutionStartDateTime = job.LastStartTime;
storedJob.MetaData = job.MetaData;
storedJob.QueueId = job.QueueId;
storedJob.StatusId = (int)job.Status;
storedJob.Application = job.Application;
storedJob.Group = job.Group;
storedJob.SuppressHistory = job.SuppressHistory;
storedJob.DeleteWhenDone = job.DeleteWhenDone;
storedJob.UniqueId = job.UniqueId;
storedJob.NextExecutionStartDateTime = job.NextStartTime;
storedJob.Name = job.Name;
storedJob.Description = job.Description;
if (job.Schedule != null)
{
storedJob.ScheduleType = job.Schedule.GetType().AssemblyQualifiedName;
//This bit is a temporary hack. Will change later to move this out of jobstore.
string newSchedule = Utils.SerializeObject(job.Schedule, job.Schedule.GetType());
if (newSchedule != storedJob.Schedule)
{
storedJob.NextExecutionStartDateTime = job.Schedule.GetNextOccurrence(storedJob.LastExecutionStartDateTime.HasValue ? storedJob.LastExecutionStartDateTime.Value : DateTime.Now);
}
storedJob.Schedule = newSchedule;
}
else
{
storedJob.ScheduleType = null;
storedJob.Schedule = null;
storedJob.NextExecutionStartDateTime = null;
}
try
{
context.SubmitChanges(System.Data.Linq.ConflictMode.FailOnFirstConflict);
ts.Complete();
return(true);
}
catch (Exception ex)
{
logger.Error(string.Format("Failed to submit changes to the database."), ex);
}
return(false);
}
}
}
return(false);
}