3/19/2023 0 Comments Taskfactory as timerTest Connection: (Test Connection before proceeding.).Use Credentials: (Select this box and proceed with your username and password if credentials are required.Server URL: (This is the domain that is hosting the file).Creating the connection manager is very easy, especially if you are not using HTTPS.Inside the Download File Task select “Create New HTTP Connection…”.Now we need to create our HTTP Connection manager.Create a new package in SSIS and pull the Task Factory Download File Task into the control flow.So in this example I am going to download a CSV File from Yahoo Finance with historical price information for Fed Ex. If you want to walk through this example and don’t currently have Task Factory you can download a free 14 day trial here: Free Trial Download Demo Time: The Download file task allows you to download files over an HTTP connection from inside an SSIS Package and it also has support for HTTPS, I will show you where to enter credentials. Using the Task Factory Download File Task I was able to dynamically download thousands of csv files with historical stock information and trends for my data warehouse. So passing the CancellationToken in the constructor is only usefull if you use the TaskFactory.Recently I wanted to download historical stock information from the internet and store this information into a data warehouse. M_defaultCreationOptions, InternalTaskOptions.None, GetDefaultScheduler(currTask), ref stackMark) Īs you can see m_defaultCancellationToken from the constructor is used when you're not using the one with the CancellationToken parameter. Return Task.StartNew(currTask, function, m_defaultCancellationToken, StackCrawlMark stackMark = StackCrawlMark.LookForM圜aller Here is an overload without the CancellationToken parameter and how it's implemented: // Methods containing StackCrawlMark local var have to be marked non-inlineable M_defaultContinuationOptions = continuationOptions M_defaultCreationOptions = creationOptions M_defaultCancellationToken = cancellationToken After all, if I'm going to explicitly pass the token to StartNew(), then what is the point of passing it to the TaskFactory constructor?Ĭonstructor: public TaskFactory(CancellationToken cancellationToken, TaskCreationOptions creationOptions, TaskContinuationOptions continuationOptions, TaskScheduler scheduler)ĬheckMultiTaskContinuationOptions(continuationOptions) So I'm not sure if I'm just seeing examples that are doing work they don't need to do, or if there is something fundamental I'm misunderstanding here. Passing the same exact token to StartNew() as the factory is allegedly configured to automatically associate with the tasks created by this factory. So that's what I thought, except I see a number of examples online that essentially look like this: TaskFactory factory = new TaskFactory(token) Of course why would I do that? It would seem to make more sense to just use the () for the one-off task (unless I had other common config I guess). ![]() now create a special task that marches to its own drummer (token)įactory.StartNew(() => DoSomeWork(differentToken), differentToken) imagine a few more tasks created just like above This leads me to believe that I can do this: TaskFactory factory = new TaskFactory(token) įactory.StartNew(() => DoSomeWork(token)) // don't need to pass token to StartNew() TaskFactory unless another CancellationToken is explicitly specified The CancellationToken that will be assigned to tasks created by this ![]() When using a TaskFactory (default constructor) and you want your tasks cancelable then you do the typical: (() => DoSomeWork(token), token) įactory.StartNew(() => DoSomeWork(token), token) Īccording to MSDN if instead of TaskFactory() you use TaskFactory(CancellationToken) then:
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