// This function executes the activity.
// It is highly recommended to not to block the execution of this function while executing the activity.
// All the information should be logged into the queue and the function should be returned.
// In a separate thread or on a separate machine, read the data from the queue and execute the activity.
// Once the activity action is completed the bookmark should be resumed.
// Design the activity controller to hanlde multiple activities from one workflowflow.
public override void StartResumablePSCommand(Guid jobInstanceId, Bookmark bookmark, PowerShell command, PowerShellStreams<PSObject, PSObject> streams, PSActivityEnvironment environment, PSActivity activityInstance)
{
ActivityActionData data = new ActivityActionData();
data.jobInstanceId = jobInstanceId;
data.bookmark = bookmark;
data.command = command;
data.streams = streams;
data.environment = environment;
// Add the request to the queue.
ActivityActionsQueue.TryAdd(jobInstanceId, data);
// Return the fucntion and allow the workfow do other work in parallel.
// There should be a servicing thead which gets the data from the queue and perform the action.
// To keep this sample simple, the worker thread calls the servicing function.
ThreadPool.QueueUserWorkItem(ServiceRequests, jobInstanceId);
}
/// <summary>
/// RemoteActivityResumeRequired
/// </summary>
/// <param name="activity"></param>
/// <param name="duringResumeBookmark"></param>
/// <returns></returns>
internal bool RemoteActivityResumeRequired(PSActivity activity, bool duringResumeBookmark)
{
bool activityResumeRequired = false;
if (activity is PSRemotingActivity)
{
lock (_syncObject)
{
if (_remoteRunspaceIdCollection.ContainsKey(activity.Id))
{
// if all commands are completed remove the activity instance id's entry from remoteRunspaceCollection
// otherwise restart the activity execution to reconnect to managed nodes.
Dictionary<int, Tuple<object, string>> commandRunspaceIdCollection;
_remoteRunspaceIdCollection.TryGetValue(activity.Id, out commandRunspaceIdCollection);
if (commandRunspaceIdCollection != null)
{
if (commandRunspaceIdCollection.Any(o => o.Value.Item1 is Guid))
{
activityResumeRequired = true;
}
else if (commandRunspaceIdCollection.Any(o => (o.Value.Item1 is string && o.Value.Item1.ToString().Equals("notstarted"))))
{
activityResumeRequired = true;
}
}
// This method is first time called from OnResumeBookmark, if no resume required it's entry
// needs to be removed fromt the collection as activity execution has finished.
// When an activity entry is removed, remoteActivityState will be persisted
// as part of whole workflow application persistence at the end of activity completion
if (activityResumeRequired == false)
_remoteRunspaceIdCollection.Remove(activity.Id);
}
else if (duringResumeBookmark)
{
// Activity needs to be restarted/resumed if the process got crashed/terminated just after activity is bookmarked and
// in this case there will be no entry for this activity id in _remoteRunspaceIdCollection
activityResumeRequired = true;
}
}
}
_tracer.WriteMessage(String.Format(CultureInfo.InvariantCulture, "RemoteActivityState.RemoteActivityResumeRequired returning activityResumeRequired: {0}", activityResumeRequired));
return activityResumeRequired;
}
public virtual void StartResumablePSCommand(Guid jobInstanceId, Bookmark bookmark, System.Management.Automation.PowerShell command, PowerShellStreams<PSObject, PSObject> streams, PSActivityEnvironment environment, PSActivity activityInstance)
{
throw new NotImplementedException();
}
