Re: Binding Directory question

Jon Paris wrote:

On 26-Jan-09, at 8:55 AM, midrange-l-request@xxxxxxxxxxxx wrote:

After having changed from 1 big bound pgm to one smaller pgm bound to several srvpgm, won't there be differences in behaviour?
What about things like Static variables, files staying open, etc?

Nope - why would there be?

That's true if there's only 1 big bound program, but if there's several big bound programs changed into several small programs calling several service programs, there might be differences.

If the same module is currently bound to several programs, and the module opens a file, then there might be a behaviour difference if all those bound modules were changed to be bound to a single service program.

In the bound module case, each module would have a separate independent open of the file. When these bound modules are replaced by a single bound service program, there's only one open per activation group. That can lead to inadvertent file "sharing" between programs. Not necessarily a bad thing, but I think it requires investigation for each module.

This is one of the scenarios where file parameters (new for RPG in V6R1) can be useful. The programs all call the same service programs, but instead of the service program having the F spec for the file, each program has the F spec and passes the file as a parameter to the service program. So the programs are independent the same way they would be if they were using bound modules.