Video: Windows Workflow Foundation: Cancellation Handlers

Presenter:Mike Taulty

At times, Workflow may have to cancel your executing code. When it does so, you can receive notification in the form of a cancellation handler. This session explores cancellation handlers.

The following text is a software generated transcript of the video. Click on a minute link to jump to a location within the video


Minute 0

Oh Northern In a concession of innocence in four sessions once than 10 minutes or so unconvincing to visual studio net framework my I told her work and the developer and platform group in Microsoft in the UK the seventh of Windows workflow foundation as part of the vaccinated technologies which acts at the time of Windows with their position for Windows XP service back to an server 2003 for a number develop the foundation this particular section with a photo of their council handlers in which we can declare their cultivars that is executing a council and we can take some action around s assertion and working with just 20 005 with a fair February preview and weather fax out of the February

Minute 1

Be here are visual studio and the session I learned the parallel activity a little workflow have a further look at their successes and go to work low qualifier here this parallel activity to have anxious Ivanhoe in England to Lucas as little as encounter lives up to 10 and it has been something to the console and then the first on the left delays for one second on the right delay to two seconds has fulfilled a watch the hour long video that we made its issue of the sure you are so than technical ministers watch that one and and life in undertook on And I can live with vertically tough enough to overflow nothing exciting happens we are

Minute 2

Are no the on runs of over the other way and effort into different messages are into in surveillance and so they have different delays assigned to them to t right handed left hander is winning because he sleeps running on second second under about losing because he donated two seconds and was done by a little complete and would so distinctly what happens in a circumstance where one of these parallel branches causes a problem so at the moment of those run by happily into the scandal of outside projects and have a problem 25th and throw an

Minute 3

Coping here with so little condition says that if to assert the council has gone to the properties here are threatening a condition with his earlier rule conditions within using the past were goalless and cause problem and will know that there along an enclosed problem little say that if right hand count which is look at is different to them and their cause a problem that occurred at to abandon the current workforce are exceptions who have kept their listeners with a coachload here the go ahead set the properties are piece of code and execute that throw an exception to a slower numeral application exception here so caused the problem about a no longer than

Minute 4

Moved in parallel and Sir and businesses of religious listeners were predicting a the on the right hand side as a troublemaker at second iteration is better at this than this exception arms with Alice worth up and running up with an elbow of working life in parallel and the the right hand side of his clothes dealer in the guise day to do with a little founder and at that point because of the humble exception of Iraq

Minute 5

It is tears than the other unfaithfulness downloads of its consumers were modestly as his collapse at a so overwrite is tearing down the one on the left my example will doing anything very important s activity on the left was doing something important and began a cause it to be cancelled and it gets no way of knowing land important that activity over here are some kind of tidying up before it had cancelled telescope about the got his activities it has a cancellation handle on it other than his composite activities have cancellation and the sullen and set alight if this profligate councils so if it was terminating cities executing a word of this is how something that there definitely is that I in the life and times of workflow to a leisure club

Minute 6

A cut activity on here and will look at the properties that are too executing code and if they didn t would will learn cancellation and in a code over the boat went on a those are his airline where this activities council will obviously be run in Kosovo Council Bert Ellis had a chance to do something before we are cancelled gunrunner that point I will ever behave well other than his violent productivity of the right within the same illustrations and fellow exceptions not handled so envelopes with the exception If cancellation code from the right hand side to status of the product cancellation here

Minute 7

Such that went unheeded along one of his other parallel punches in other areas where you ve got things going on in at the same time we can compensate in some ways that we can take some action to tidy up and of imported realises that the workflow itself also has a cancellation handler at a time in the middle of year film a cancellation handler for the workflow code on their sofa s council then can you convince and 32 incentives cancellation handler is actually going on a frequent a second time again in the branch left hand side change things so lifeboat on the sequence of her cancellation handler to go in there

Minute 8

Little than cancellation and liver in a sequence of us will just into code rice out in a sequence in sequence to as a workload while little is that I ll have a look at the Council house will and s code and this will allow the killers go ahead and configure that and we would write while the and once again in Slovakia are resolutely out of sequence here and that the council had run their own was encoding their and I guess disguising out of sequence just the writer had to sequence

Minute 9

Little to a hotel for the Polo committee alone as good that it has a council handler it was very little is the leader s linear and Gundry these occurred into their first front to hear this is the lamb parallel have finally does go to work herself look at its council handler and legacy code into their Annandale writer will work on so full that it was on his methods all of our five different councillors and handlers

Minute 10

Amateur is if leading this new translation on superbus then had a councillor shall allow the her cancellation of out of sequence at is only considered essentially we are back to the main sequential worth other hand than his power O Shea if anything was happening is that the sister of a sequence back rather than a cancellation and was a

Minute 11

Is died the will tell you is that he though that was actually executing is being cancelled so we thought that this must have cancelled their wildest cancelled the second council but how doesn t the power of the view that as s cancellation of the powered sale s cancellation of his one round here and also opposed in the workload is in a council gardener is now of the anti war councils and other photo than they got notified when so there was even a short session who is it sooner we can have cancellation handles on composite activities have you got us into executing it is the chance that you will council numeral code executes their missing into the workflow level so that you can develop a composite activity of

Minute 12

Oh things stand to realise is that hierarchy that we saw in the last example where on leadership strategy executing at cancellation coal and a final thing to realise is that the combatant of about transactions on how we can compensate the transactions and his council handles and are meant to be transactional compensation will in a subsequent session peso ego draws more information on the windows were of the foundation of the Christian developers enter up embassy in Microsoft com when effects are not lead you to information on all the effects presentation communication and workflow orders and you dedicated site at www windowsworth net which is purely about the windows with the foundation is lots of examples and examples of their should feel free to mail me my e mail address is there on the screen and

Minute 13

Their provide feedback and so on under the digital listening a lot to catch it on a site

Click here to go to original video page