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| QSA ToolWorks Public Feedback Forum > What if Helix Can No Longer...? > Publish and Subscribe | You are not logged in. Login or Register. |
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| Author: | Topic: Publish and Subscribe | |||
Matt Posts: 107 Registered: 2003-02-16  mstrange@mac.com  |
 Posted: Feb 21, 2003 4:45:43 pm    
The Publish and Subscribe technology is only available under the Classic Mac OS. It isn't available under OS X or any of the other target platforms. We want to know if this will adversely impact your Helix applications. We also want to attempt to list all of the technical hurdles that must be dealt with in order to effect this change. If you can think of an area where pub/sub touches Helix, but isn't listed, please add a note about it. -- Custom User Menus: the pub/sub items will be removed from the User definitions during Update Collection. After update, those menus will simply have a few less items than they did before. -- Sequences: the pub/sub items will be removed from the sequences during Update Collection. After update, those sequences will simply have a few less items than they did before. (This may result in some meaningless constuctions.) -- Import/Export: Subscribing to data is analogous to importing. Forms that were set as subscribers, and would therefore initiate an import when opened, will no longer do so. Publishing data is analogous to exporting. Forms that were set as publishers, and would therefore initiate an export at certain times (publish now, etc.), will no longer do so. Summary of discussion to date: (Thanks: Sven, Paul, Chuck, Bill, Lee, Dan)
Lee's comment remains below, as it does suggest that an alternative needs to be found. We don't know the answer to this one yet. (Anybody know if there is a similar OS X technology?) Answers needed. - Edited by Matt on: Apr 10, 2003 5:43:47 pm - Edited by Matt on: Apr 11, 2003 9:23:11 am
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lucidlee Posts: 18 Registered: 2003-04-09 |
 Posted: Apr 10, 2003 12:04:15 pm
I would miss the functionality of P&S if not the P&S implementation itself, which is to say an automated way of communicating with external applications. In other words if P&S were replaced with XML and CRON then I would be happy. Lee
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Michael S. Scaramella, Esq. Posts: 7 Registered: 2003-04-09 |
 Posted: May 19, 2003 3:49:08 pm
A new data transfer utility like PowerMover, or a way to read data stored in one Helix collection from another, would substantially offset the loss of Publish & Subscribe. Flexibility, reliability, and ease in moving or reading data in the context of multiple Helix based applications is more important than sharing data with applications outside of the Helix family of products. Read-only access to data stored in separate collection files would be very useful. If this were possible, posting could be used to powerful effect. For years we have been publishing a companion application named Data Clerk that shares data stored in Managing Partner or Managing Director via Publish & Subscribe. This enables us to leave our main commercial applications consistent and closed, which is essential to sustaining commercial viability. Custom features that may be needed to fulfill particular requirements of licensees are added to Data Clerk. After the loss of Publish & Subscribe, it will still be possible to transfer or update data manually using export and import operations, but this is a bit too crude to seem professional.
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| Fred Posts: 57 Registered: 2003-04-10 |
Posted: May 20, 2003 8:08:40 am
quote: This can be done using Appleevents. There are currently 2 possibilities available 1) Write your own solution using CallHelix/ RealBasic/Qilan/Java/ C - the basic code already exists at the FTP site for the last 2 options. 2) Get someone else to write it for you Fred |
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| Michael S. Scaramella, Esq. Posts: 7 Registered: 2003-04-09 |
Posted: May 20, 2003 1:28:24 pm
Fred wrote: quote: It is true that Helix Apple Events used in conjunction with a third-party application can perform the functions I mentioned. My continuing concern is about what can be done exclusively within the Helix environment. This is especially important to those who are not comfortable with Apple Event code. Also, a continued reliance on Apple Events for basic data transfer or external data access will prevent feature parity across multiple platforms. I expect all of us would like to see the unrealized potential of the long gone Access icon finally realized in an OS X native Helix.
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| Fred Posts: 57 Registered: 2003-04-10 |
Posted: May 21, 2003 3:04:57 am
Michael S. Scaramella, Esq. wrote : quote: Unfortunately Appleevents will be the only option remaining untill.......... quote: There are ways and means of "wrapping" appleevents into comfortable front ends. These can be included in Collections and run as documents (visible and invisble). I'll stop here as everyone probably realises that I am a Helix AEEA freak  quote: Yes parity across multiple platforms would almost certainly exclude apple events or require or some sort of conditional platform instructions. For the time being I am not even imagining it as I don't have the vaguest idea of when a multiple platform will see the light of day. Especially not if you want to cover the varying OS'es of other platforms. quote: ahhhh... I remember having the Tape (still have it somewhere) but couldn't find anyone with a VAX that would let me play on it  Fred |
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| Matt Posts: 107 Registered: 2003-02-16 mstrange@mac.com |
Posted: May 24, 2003 6:35:33 pm
quote: Keep in mind that Helix Technologies is committed to not undercutting the third party solutions that exist. We have no plans to build anything into Helix that would replace Osmosis, Qilan, CallHelix, or any similar product. Our reasoning is simple: Those third parties were extending Helix while the company itself was floundering. Building functionality into Helix that would eliminate their markets would be unkind, to say the least. Beside, there are a lot of other things - things that Helix can't do with or without third party extensions - for us to focus on.
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| Matt Posts: 107 Registered: 2003-02-16 mstrange@mac.com |
Posted: Jul 21, 2003 11:31:45 am
End of the line: the Publish and Subscribe code has been removed from the Helix 6 code.
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