ArcGIS Engine Developer Guide

APPLICATION DEVELOPMENT AND LICENSE INITIALIZATION
EXAMPLE B—MINIMUM LICENSE IS ARCGIS ENGINE WITH
GEODATABASE UPDATE AND SPATIAL EXTENSIONS
In the next example, the application is an enterprise geodatabase editing application
and, therefore, requires the minimum of an ArcGIS Engine with
Geodatabase Update extension license. Additionally, this developer has decided
that if an ArcGIS Engine with Geodatabase Update extension license is not
available, the application could run with an ArcEditor or ArcInfo license instead.
The application also requires spatial extension functionality for it to run successfully,
so the extension needs to be checked out for the duration of the application.
In this case, the application will first attempt to initialize against the ArcGIS
Engine with Geodatabase Update extension product license. If that fails, it will
attempt to initialize against an ArcEditor license, and if still unsuccessful, the
application will finally attempt to initialize against the ArcInfo product license.
The following sections outline the steps taken to initialize the application with a
license.
Step 1: Check product license
availability
Step 2: Check extension license
availability
Step 3: Initialize the application
Step 4: Check extensions in and
out
Step 5: Shutdown
Attempting initialization with the ArcGIS Engine with Geodatabase
Update product license
As noted above, to run successfully the application requires at minimum an
ArcGIS Engine with Geodatabase Update extension product license along with
the corresponding Spatial extension license. The application’s first attempt at
initialization should be against this minimal level of product licensing.
The application’s attempts at initialization follow the process discussed earlier:
1. Check whether an ArcGIS Engine with Geodatabase Update extension product
license is available. If yes, proceed to the next step in the initialization
process.
If not, discontinue this attempt and restart initialization with any secondary
level of allowable product licensing.
2. Check whether an Spatial extension license is available with the ArcGIS
Engine with Geodatabase Update extension product license. If yes, proceed
to the next step in the initialization process. If not, discontinue this attempt
and restart initialization with any secondary level of allowable product licensing.
3. Check out the ArcGIS Engine with Geodatabase Update extension product
license by initializing the application. If the license checked out, proceed to
the next step in the initialization process. If the license failed to check out,
discontinue this attempt and restart initialization with any secondary level of
allowable product licensing.
4. Check out the Spatial extension. Since no other extension licenses are needed,
if the license checked out, the application has been successfully configured
with licenses.
If the license failed to check out, discontinue this attempt and restart initialization
with any secondary level of allowable product licensing.
5. The final step in the initialization process is ensuring that the licenses are
released when the application is shut down.
268 • ArcGIS Engine Developer Guide