Chapter 8: Converting Legacy Installations Using the Repackager Interface
Isolating Windows Installer Packages
AdminStudio 9.5 User Guide
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About Application Isolation
Application isolation, which is a technique used to minimize the dependencies of an application on system
components or dynamic elements, is one solution to component versioning conflicts. Isolation reduces versioning
conflicts by modifying an application so it always loads the versions of components and dynamic elements with
which it was originally developed and tested.
Isolation is accomplished by:
•
Providing DLLs and other shared components for specific applications,
and
•
Placing information traditionally stored in the Registry into other files that specify the locations of these isolated
components.
Application isolation provides increased stability and reliability for applications because they are unaffected by
changes caused by installation and ongoing maintenance of other applications on the system.
Depending on the isolation options chosen, you can partially or totally isolate an application. When using
assemblies and manifests to isolate applications for Windows XP systems, the assemblies can be updated
following deployment without necessitating application reinstallation.
Reasons to Isolate Applications
You would want to isolate an application if:
•
You want to resolve incompatibilities between different versions of shared components.
•
You want to reduce the complexity of the installation by storing COM activation data in a manifest instead of
the registry.
•
You want to insulate the application from changes to shared components.
Reasons Not to Isolate an Application
You would not want to isolate an application if, following application isolation, you discover that the application no
longer works because of an internal dependency on a component that has been moved during the isolation
process.
Tip •
Following isolation, you can use the Dynamic Dependency Scanner in InstallShield Editor to verify isolated
files are loaded from a different directory.
Isolating Windows Installer Packages Using Application Isolation Wizard
In addition to being able to generate an isolated version of a repackaged setup immediately after the build step in
Repackager, you can also use Application Isolation Wizard to isolate a Windows Installer package.
Application Isolation Wizard is a stand-alone tool which accepts a Windows Installer package as input and outputs
a new, isolated Windows Installer package.
Summary of Contents for ADMINSTUDIO 9.5
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