/// <summary>
/// Run a workflow step
/// </summary>
/// <param name="workflowMessage">Message to pass to the step class</param>
/// <param name="retryStepTimes">Times to retry on error</param>
/// <param name="workflowStep">The step to run</param>
internal void RunFrameworkStep(IWorkflowMessage workflowMessage, int retryStepTimes, ProcessorStep workflowStep, ProcessorJob currentJob, bool isCheckDepends)
{
bool impersonated = false;
if (!string.IsNullOrEmpty(workflowStep.RunAsDomain) && !string.IsNullOrEmpty(workflowStep.RunAsUser) && !string.IsNullOrEmpty(workflowStep.RunAsPassword) && workflowStep.RunMode == FrameworkStepRunMode.STA)
impersonated = impersonate.ImpersonateValidUser(workflowStep.RunAsUser, workflowStep.RunAsDomain, workflowStep.RunAsPassword);
using (IStep step = StepFactory.GetStep(workflowStep.InvokeClass))
{
try
{
workflowStep.RunStatus = FrameworkStepRunStatus.Loaded;
if (isCheckDepends)
WaitForDependents(workflowStep, currentJob);
workflowStep.StartDate = DateTime.Now;
step.RunStep(workflowMessage);
workflowStep.EndDate = DateTime.Now;
workflowStep.RunStatus = FrameworkStepRunStatus.Complete;
workflowStep.ExitMessage = "Complete";
}
catch (Exception e)
{
workflowStep.RunStatus = FrameworkStepRunStatus.CompleteWithErrors;
workflowStep.ExitMessage = e.Message;
while (e.InnerException != null)
{
e = e.InnerException;
workflowStep.ExitMessage += '|' + e.Message;
}
switch (workflowStep.OnError)
{
case OnFrameworkStepError.RetryStep:
if (workflowStep.WaitBetweenRetriesMilliseconds > 0)
Thread.Sleep(workflowStep.WaitBetweenRetriesMilliseconds);
// Try the step again
retryStepTimes++;
if (retryStepTimes <= workflowStep.RetryTimes)
RunFrameworkStep(workflowMessage, retryStepTimes, workflowStep, currentJob, isCheckDepends);
break;
default:
// If this is running from a thread, do not throw the error up
if (workflowStep.RunMode == FrameworkStepRunMode.STA)
throw e;
else
Processor.ReportJobError(e, workflowStep, workflowMessage, currentJob);
break;
}
}
}
if (impersonated)
impersonate.UndoImpersonation();
}
/// <summary>
/// Load the framework config from workflow.xml
/// </summary>
internal static void LoadFrameworkConfig(ProcessorJob processorJob)
{
XmlDocument doc = new XmlDocument();
XmlTextReader reader = new XmlTextReader(EngineConfiguration.FrameworkConfigLocation);
doc.Load(reader);
reader.Close();
// Load the job
XmlNode jobNode = doc.SelectSingleNode("//Job[@Name='" + processorJob.JobName + "']");
processorJob.MessageClass = jobNode.Attributes["MessageClass"].Value;
if (jobNode.Attributes["MessageQueue"] != null && !string.IsNullOrEmpty(jobNode.Attributes["MessageQueue"].Value))
processorJob.MessageQueue = jobNode.Attributes["MessageQueue"].Value;
if (jobNode.Attributes["ErrorQueue"] != null && !string.IsNullOrEmpty(jobNode.Attributes["ErrorQueue"].Value))
processorJob.ErrorQueue = jobNode.Attributes["ErrorQueue"].Value;
if (jobNode.Attributes["PoisonQueue"] != null && !string.IsNullOrEmpty(jobNode.Attributes["PoisonQueue"].Value))
processorJob.PoisonQueue = jobNode.Attributes["PoisonQueue"].Value;
if (jobNode.Attributes["CompletedQueue"] != null && !string.IsNullOrEmpty(jobNode.Attributes["CompletedQueue"].Value))
processorJob.CompletedQueue = jobNode.Attributes["CompletedQueue"].Value;
if (jobNode.Attributes["NotifyComplete"] != null && !string.IsNullOrEmpty(jobNode.Attributes["NotifyComplete"].Value))
{
bool notifyComplete = false;
if (bool.TryParse(jobNode.Attributes["NotifyComplete"].Value, out notifyComplete))
processorJob.NotifyComplete = notifyComplete;
}
if (jobNode.Attributes["MaxRunTimeMilliseconds"] != null && !string.IsNullOrEmpty(jobNode.Attributes["MaxRunTimeMilliseconds"].Value))
{
int maxRunTimeMilliseconds = 0;
if (int.TryParse(jobNode.Attributes["MaxRunTimeMilliseconds"].Value, out maxRunTimeMilliseconds))
processorJob.MaxRunTimeMilliseconds = maxRunTimeMilliseconds;
}
if (jobNode.Attributes["MessageQueueType"] != null && !string.IsNullOrEmpty(jobNode.Attributes["MessageQueueType"].Value))
processorJob.MessageQueueType = (MessageQueueType)Enum.Parse(typeof(MessageQueueType), jobNode.Attributes["MessageQueueType"].Value, true);
//Load the Queues
XmlNode queuesNode = jobNode.SelectSingleNode("//Job[@Name='" + processorJob.JobName + "']/Queues");
if (queuesNode != null)
LoadJobQueues(processorJob, queuesNode);
//Load the steps
XmlNode stepsNode = jobNode.SelectSingleNode("//Job[@Name='" + processorJob.JobName + "']/Steps");
if (stepsNode != null)
LoadJobSteps(processorJob, stepsNode);
else // For backwards compatibility
LoadJobSteps(processorJob, jobNode);
}
/// <summary>
/// Load the Job's Queues
/// </summary>
/// <param name="processorJob">The ProcessorJob to load to</param>
/// <param name="queuesNode">The XmlNode to load from</param>
private static void LoadJobQueues(ProcessorJob processorJob, XmlNode queuesNode)
{
foreach (XmlNode queueNode in queuesNode.ChildNodes)
{
ProcessorQueue processorQueue = new ProcessorQueue();
if (!string.IsNullOrEmpty(queueNode.Attributes["MessageQueue"].Value)) //Required
processorQueue.MessageQueue = queueNode.Attributes["MessageQueue"].Value;
if (!string.IsNullOrEmpty(queueNode.Attributes["ErrorQueue"].Value)) //Required
processorQueue.ErrorQueue = queueNode.Attributes["ErrorQueue"].Value;
if (!string.IsNullOrEmpty(queueNode.Attributes["PoisonQueue"].Value)) //Required
processorQueue.PoisonQueue = queueNode.Attributes["PoisonQueue"].Value;
if (!string.IsNullOrEmpty(queueNode.Attributes["CompletedQueue"].Value)) //Required
processorQueue.CompletedQueue = queueNode.Attributes["CompletedQueue"].Value;
if (!string.IsNullOrEmpty(queueNode.Attributes["MessageQueueType"].Value)) //Required
processorQueue.MessageQueueType = (MessageQueueType)Enum.Parse(typeof(MessageQueueType), queueNode.Attributes["MessageQueueType"].Value, true);
processorJob.ProcessorQueues.Add(processorQueue);
}
}
/// <summary>
/// Block untill all steps and groups this step depends on have finished
/// </summary>
/// <param name="workflowStep"></param>
private void WaitForDependents(ProcessorStep workflowStep, ProcessorJob currentJob)
{
if (string.IsNullOrEmpty(workflowStep.DependsOn) &&
string.IsNullOrEmpty(workflowStep.DependsOnGroup))
return;
var result = from ProcessorStep in currentJob.WorkFlowSteps
where ProcessorStep.RunStatus != FrameworkStepRunStatus.Complete &&
(workflowStep.DependsOn.Split(',').Contains(ProcessorStep.StepName) ||
workflowStep.DependsOnGroup.Split(',').Contains(ProcessorStep.Group))
select ProcessorStep;
if (result.Count() > 0) //There are still steps to wait for
{
Thread.Sleep(100);
workflowStep.RunStatusTime += 100;
if (workflowStep.RunStatusTime <= workflowStep.WaitForDependsOnMilliseconds)
WaitForDependents(workflowStep, currentJob);
}
}
/// <summary>
/// Load the Job's steps
/// </summary>
/// <param name="processorJob">The ProcessorJob to load to</param>
/// <param name="queuesNode">The XmlNode to load from</param>
private static void LoadJobSteps(ProcessorJob processorJob, XmlNode stepsNode)
{
foreach (XmlNode stepNode in stepsNode.ChildNodes)
{
ProcessorStep workFlowStep = new ProcessorStep();
if (!string.IsNullOrEmpty(stepNode.Attributes["Name"].Value)) //Required
workFlowStep.StepName = stepNode.Attributes["Name"].Value;
if (!string.IsNullOrEmpty(stepNode.Attributes["Group"].Value)) //Required
workFlowStep.Group = stepNode.Attributes["Group"].Value;
if (!string.IsNullOrEmpty(stepNode.Attributes["InvokeClass"].Value)) //Required
workFlowStep.InvokeClass = stepNode.Attributes["InvokeClass"].Value;
if (stepNode.Attributes["OnError"] != null && !string.IsNullOrEmpty(stepNode.Attributes["OnError"].Value))
workFlowStep.OnError = (OnFrameworkStepError)Enum.Parse(typeof(OnFrameworkStepError), stepNode.Attributes["OnError"].Value, true);
if (stepNode.Attributes["RetryTimes"] != null && !string.IsNullOrEmpty(stepNode.Attributes["RetryTimes"].Value))
{
int retryTimes = 0;
int.TryParse(stepNode.Attributes["RetryTimes"].Value, out retryTimes);
workFlowStep.RetryTimes = retryTimes;
}
if (stepNode.Attributes["WaitBetweenRetriesMilliseconds"] != null && !string.IsNullOrEmpty(stepNode.Attributes["WaitBetweenRetriesMilliseconds"].Value))
{
int waitBetweenRetriesMilliseconds = 0;
int.TryParse(stepNode.Attributes["WaitBetweenRetriesMilliseconds"].Value, out waitBetweenRetriesMilliseconds);
workFlowStep.WaitBetweenRetriesMilliseconds = waitBetweenRetriesMilliseconds;
}
if (stepNode.Attributes["RunMode"] != null && !string.IsNullOrEmpty(stepNode.Attributes["RunMode"].Value))
workFlowStep.RunMode = (FrameworkStepRunMode)Enum.Parse(typeof(FrameworkStepRunMode), stepNode.Attributes["RunMode"].Value, true);
if (stepNode.Attributes["DependsOn"] != null && !string.IsNullOrEmpty(stepNode.Attributes["DependsOn"].Value))
workFlowStep.DependsOn = stepNode.Attributes["DependsOn"].Value;
if (stepNode.Attributes["DependsOnGroup"] != null && !string.IsNullOrEmpty(stepNode.Attributes["DependsOnGroup"].Value))
workFlowStep.DependsOnGroup = stepNode.Attributes["DependsOnGroup"].Value;
if (stepNode.Attributes["WaitForDependsOnMilliseconds"] != null && !string.IsNullOrEmpty(stepNode.Attributes["WaitForDependsOnMilliseconds"].Value))
{
int waitForDependsOnMilliseconds = int.MaxValue;
if (!string.IsNullOrEmpty(stepNode.Attributes["WaitForDependsOnMilliseconds"].Value))
int.TryParse(stepNode.Attributes["WaitForDependsOnMilliseconds"].Value, out waitForDependsOnMilliseconds);
workFlowStep.WaitForDependsOnMilliseconds = waitForDependsOnMilliseconds;
}
if (stepNode.Attributes["RunAsDomain"] != null && !string.IsNullOrEmpty(stepNode.Attributes["RunAsDomain"].Value))
workFlowStep.RunAsDomain = Utils.GetDecryptedString(stepNode.Attributes["RunAsDomain"].Value);
if (stepNode.Attributes["RunAsUser"] != null && !string.IsNullOrEmpty(stepNode.Attributes["RunAsUser"].Value))
workFlowStep.RunAsUser = Utils.GetDecryptedString(stepNode.Attributes["RunAsUser"].Value);
if (stepNode.Attributes["RunAsPassword"] != null && !string.IsNullOrEmpty(stepNode.Attributes["RunAsPassword"].Value))
workFlowStep.RunAsPassword = Utils.GetDecryptedString(stepNode.Attributes["RunAsPassword"].Value);
processorJob.WorkFlowSteps.Add(workFlowStep);
}
}
/// <summary>
/// Reports a job error
/// </summary>
/// <param name="e">The exception to report</param>
/// <param name="step">The step the exception accrued</param>
/// <param name="workflowMessage">The original message pulled from the queue</param>
public static void ReportJobError(Exception e, ProcessorStep workflowStep, IWorkflowMessage workflowMessage, ProcessorJob currentJob)
{
// Push an error message to the error Queue
WorkflowErrorMessage errorMessage = new WorkflowErrorMessage() { ExceptionMessage = e.Message, JobName = currentJob.JobName, StepName = workflowStep.StepName };
//if e contains inner exceptions, add those messages
while (e.InnerException != null)
{
//assign e to the inner exception - recursive
e = e.InnerException;
errorMessage.ExceptionMessage += '|' + e.Message;
}
FrameworkManager.AddFrameworkError(currentJob, workflowMessage, errorMessage);
}
/// <summary>
/// This method starts the framework and blocks.
/// Call this from an exe or a windows service on a new thread.
/// </summary>
/// <param name="jobName">The workflow job name</param>
public void StartFramework(string jobName)
{
processorJob = new ProcessorJob();
processorJob.JobName = jobName;
pool = new Semaphore(EngineConfiguration.FrameworkMaxThreads, EngineConfiguration.FrameworkMaxThreads);
JobsRunning = 0;
// Load the config file and start processing jobs
WorkflowConfiguration.LoadFrameworkConfig(processorJob);
FrameworkOn = true;
LoadActiveQueue();
ProcessorQueue.ProcessorQueueChanged += new ProcessorQueue.ProcessorQueueEventHandler(ProcessorQueue_ProcessorQueueChanged);
executor.ProcessorJob = processorJob;
RunFramework(5, 0, 5);
FrameworkOn = false;
}
public static void ReportJobComplete(IWorkflowMessage workflowMessage, ProcessorJob currentJob)
{
if (currentJob.NotifyComplete &&
currentJob.WorkFlowSteps.Where(s => s.RunStatus == FrameworkStepRunStatus.Complete).Count() == currentJob.WorkFlowSteps.Count())
FrameworkManager.AddFrameworkJobComplete(currentJob, workflowMessage);
}
/// <summary>
/// Add a job for the framework to process
/// </summary>
/// <param name="jobName">The name of the job in the framework's workflow file</param>
/// <param name="message">A class containing the message data</param>
public static void AddFrameworkJob(string jobName, IWorkflowMessage message)
{
// Add a message to the Queue
ProcessorJob processorJob = new ProcessorJob() { JobName = jobName, CreatedDate = DateTime.Now };
WorkflowConfiguration.LoadFrameworkConfig(processorJob);
ProcessorQueue processorQueue = GetActiveQueue(processorJob, QueueOperationType.Delivery);
MessageQueue workflowQueue = new MessageQueue(processorQueue.MessageQueue);
MessageQueueTransaction transaction = new MessageQueueTransaction();
try
{
if (processorQueue.MessageQueueType == MessageQueueType.Transactional)
{
transaction.Begin();
workflowQueue.Send(message, jobName, transaction);
transaction.Commit();
}
else
{
workflowQueue.Send(message, jobName);
}
}
catch (Exception e)
{
if (processorQueue.MessageQueueType == MessageQueueType.Transactional &&
transaction.Status == MessageQueueTransactionStatus.Pending)
transaction.Abort();
throw new WorkflowException("Error adding message to Queue", e);
}
finally
{
transaction.Dispose();
workflowQueue.Dispose();
}
}
internal static void AddFrameworkJobComplete(ProcessorJob processorJob, IWorkflowMessage message)
{
try
{
WorkflowConfiguration.LoadFrameworkConfig(processorJob);
ProcessorQueue processorQueue = GetActiveQueue(processorJob, QueueOperationType.Delivery);
QueueOperationsHandler.HandleComplete(processorQueue, message);
}
catch (Exception)
{
}
}
/// <summary>
/// Add a message containing the error to the error queue and the original message to the poison queue
/// </summary>
/// <param name="jobName"></param>
/// <param name="message"></param>
internal static void AddFrameworkError(ProcessorJob processorJob, IWorkflowMessage message, WorkflowErrorMessage errorMessage)
{
try
{
WorkflowConfiguration.LoadFrameworkConfig(processorJob);
ProcessorQueue processorQueue = GetActiveQueue(processorJob, QueueOperationType.Delivery);
MsmqPoisonMessageException error = new MsmqPoisonMessageException() { Source = processorJob.JobName };
error.Data["processorQueue"] = processorQueue;
error.Data["message"] = message;
error.Data["errorMessage"] = errorMessage;
QueueOperationsHandler.HandleError(error);
}
catch (Exception)
{
}
}
/// <summary>
/// Get the currently active Queue to pickup or deliver messages
/// </summary>
/// <param name="processorJob">The current loaded configuration</param>
/// <param name="queueOperationType">The type of operation to execute on the Queue</param>
/// <returns>The current active ProcessorQueue for the Operation Type</returns>
public static ProcessorQueue GetActiveQueue(ProcessorJob processorJob, QueueOperationType queueOperationType)
{
// For backward compatibility if the master Queue is present return it
if (!string.IsNullOrEmpty(processorJob.MessageQueue) && !string.IsNullOrEmpty(processorJob.ErrorQueue))
return new ProcessorQueue()
{
MessageQueue = processorJob.MessageQueue,
ErrorQueue = processorJob.ErrorQueue,
PoisonQueue = processorJob.PoisonQueue,
CompletedQueue = processorJob.CompletedQueue,
MessageQueueType = processorJob.MessageQueueType
};
//If this is a delivery, deliver to the first available queue
//If this is a pickup, pick it from the queues in a reverse order
// Get the first queue with messages
ProcessorQueue queue = new ProcessorQueue();
lock (activeQueueSearchLock)
{
if (queueOperationType == QueueOperationType.Pickup)
processorJob.ProcessorQueues.Reverse();
foreach (ProcessorQueue processorQueue in processorJob.ProcessorQueues)
{
MessageQueue workflowQueue = new MessageQueue(processorQueue.MessageQueue);
queue = processorQueue;
try
{
using (MessageQueue msmq = new MessageQueue(processorQueue.MessageQueue))
{
msmq.Peek(new TimeSpan(0));
break;
}
}
catch (MessageQueueException e)
{
if (e.MessageQueueErrorCode == MessageQueueErrorCode.IOTimeout)
{
// The queue is is available and empty it can be used for delivery
if (queueOperationType == QueueOperationType.Delivery)
break;
}
}
catch (Exception) { }
}
// Reverse the queue list back to the original order
if (queueOperationType == QueueOperationType.Pickup)
processorJob.ProcessorQueues.Reverse();
}
return queue;
}
