ArcGIS Engine Developer Guide

APPLICATION DEVELOPMENT AND LICENSE INITIALIZATION
Step 4: Check extensions in and
out
Step 5: Shutdown
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
In this example, no licenses beyond the ArcGIS Engine product license need
to be checked out, so if that license checked out, the application has been
successfully configured with licenses.
4. The final step in the initialization process is ensuring that the licenses are
released when the application is shut down.
Attempting initialization with the ArcInfo product license
If the first (ArcGIS Engine), second (ArcView), and third (ArcEditor) product
levels fail to initialize correctly, one final level of licensing—ArcInfo—is available.
The application makes a final attempt to initialize by following the defined
process.
1. Check whether an ArcInfo 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 fourth level of allowable product licensing.
2. Check whether an ArcGIS Network extension license is available with the
ArcInfo product license. If yes, proceed to the next step in the initialization
process. If not, discontinue this attempt and restart initialization with any
fourth level of allowable product licensing.
3. Check out the ArcInfo 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 fourth level of allowable product licensing.
Since this application dynamically checks out the ArcGIS Network extension,
this step is not performed at this time. Instead, the license will be checked out
during usage of Network functionality. See the section ‘Using Network
functionality’ below for details on this process.
In this example, no licenses beyond the ArcGIS Engine product license need
to be checked out, so if that license checked out, the application has been
successfully configured with licenses.
4. The final step in the initialization process is ensuring that the licenses are
released when the application is shut down.
Using Network functionality
During each of the initialization attempts in this example, the checkout of the
Network extension did not occur during application startup. Instead, the checkout
occurs dynamically when the Network functions are accessed within the
application. This means that the Network license continues to be available to
other users when not in use by this application.
As discussed earlier in the chapter, the extension license must be of the same
product type as the base license. If the application initialized with an ArcGIS
Engine product license, then the Network functionality cannot be initialized
unless an ArcGIS Engine extension license for Network is available. When the
application user attempts to perform any Network functions, the application
performs the following steps to activate the needed functions:
272 • ArcGIS Engine Developer Guide