Custom source adapter UI

I am currently writing a custom source adapter that extracts data from a JD Edwards OneWorld system. In the custom user interface of the source component I need to allow the user to set a query (a custom property), and then refresh a list of output columns that will be extracted based upon that query (similar to the list shown in the advanced editor).

My question is, can I apply the custom property change to the component and build my output column list without closing and restarting my custom UI form? I understand that the IDTSComponentUI interface being implemented allows for transactional editing of the component, in that the changes to the component are not applied until I have returned a result in the implemented Edit() method. However is there a way to apply changes without returning this result (and closing my UI)?

Essentially I am looking to have similar behaviour to that of the 'Refresh' button in the advanced component editor form.

Thanks

The transactional edit work by cloning the component - the UI works only with the component clone, and can use all the functionality of the component. So when the component property changes, your UI should apply the changes to the clone, the component (clone) refreshes it output columns and then UI can show refreshed list of output columns. After user closes the UI, the changes are applied to the original component.|||

great, thanks for the response

Custom Destination Adapter

Hi All,

I have built a custom flat file destination adapter but it appears that the code is not working. When I debug the process I notice that the ProcessInput section is called multiple times. The first time it looks like everything is working, then it call it again and there is no inpout from the DTSInput90.

Why would it do this?

Thanks

Mike

Data moves down the pipeline in buffers. It is not one stream, or individual rows. Obviously buffers have a limited capacity, so you will get multiple buffers depending on the number of rows. The rows per buffer depends on the size of the row essentially.

So ProcessInput gets called once per buffer. This is why you cache buffer information in PreExecute, so that you get re-use. Querying the information can be quite expensive which is why it is cached to start with.

I'm not sure what you mean by "there is no inpout from the DTSInput90", can you explain?

|||Basically what I am saying is that the second time through there is no data. So if you want to capture all the data from the buffer and write it all out in a file how would you do that?|||

That doesn't sound particularly useful, but maybe how it works. Not sure I've ever stepped through to that degree. It should not cause you any problems however, but are you getting all the data you expect? Is there actually a problem?

|||

I figured it out. The detination component takes the input stream and creates a ZIP file with some delimiter that I have defined. I needed to create a global variable for the string and keep appending until then buffers were complete and then run through the ZIP code.

Thanks

Custom Destination Adapter

Hi All,

I have built a custom flat file destination adapter but it appears that the code is not working. When I debug the process I notice that the ProcessInput section is called multiple times. The first time it looks like everything is working, then it call it again and there is no inpout from the DTSInput90.

Why would it do this?

Thanks

Mike

Data moves down the pipeline in buffers. It is not one stream, or individual rows. Obviously buffers have a limited capacity, so you will get multiple buffers depending on the number of rows. The rows per buffer depends on the size of the row essentially.

So ProcessInput gets called once per buffer. This is why you cache buffer information in PreExecute, so that you get re-use. Querying the information can be quite expensive which is why it is cached to start with.

I'm not sure what you mean by "there is no inpout from the DTSInput90", can you explain?

|||Basically what I am saying is that the second time through there is no data. So if you want to capture all the data from the buffer and write it all out in a file how would you do that?|||

That doesn't sound particularly useful, but maybe how it works. Not sure I've ever stepped through to that degree. It should not cause you any problems however, but are you getting all the data you expect? Is there actually a problem?

|||

I figured it out. The detination component takes the input stream and creates a ZIP file with some delimiter that I have defined. I needed to create a global variable for the string and keep appending until then buffers were complete and then run through the ZIP code.

Thanks

Custom Data Flow Component Column Mapping Question

Hi,

I'm having my first go at developing a destination adapter which will send data to an update Web Service.

I've got some rather big gaps in my understanding. I've been following the various samples I've found on the net and have validated my mapping and picked up all the available column names and datatypes which are appearing in the Input and Output Properties tab of the Advanced Editor but I only have a tab for "Input Columns" and not "Column Mappings".

Which method defines the availble columns for the user to map?

Let me know if I haven't given enough information.

cheers

sorry - I had searched already but somehow missed this post which answered my question: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=239126&SiteID=1

I was having the same confusion about input and output, thinking that because i was creating a *destination* adapter, that I should be creating outputs not inputs [if that makes sense].