Chapter 3. Reference

3.1. Guvnor Repository Exploring Perspective

The Guvnor Repository Exploring perspective contains two views supplied by EGT – Guvnor Repositories view and Guvnor Resource History view, that will be the center of most interactions with Guvnor, and Eclipse standard views such as Properties and Resource Navigator that are also useful.

While each of these views can be opened and positioned independently within an Eclipse workbench, the Guvnor perspective provides a convenient method of getting a suggested layout. In the Eclipse workbench menu, choose Window > Open Perspective > Other to get the perspective list:

Figure 3.1. Enabling the Guvnor Repository Perspective

And then choose Guvnor Repository Exploring. This opens the Guvnor perspective.

3.2. Guvnor Connection Wizard

This wizard appears in a number of places within the EGT (as detailed below), but in this section we will cover only the two most basic entry points.

The Guvnor Connection wizard can be started in the following ways:

using the Eclipse menu File > New > Other > Guvnor > Guvnor repository location
Figure 3.2. New Guvnor Repository Location
in the Guvnor Repositories view using the drop-down menu
Figure 3.3. Adding New Guvnor Connection
using the menu button ( )

Choosing either of these will start the Guvnor Connection wizard.

Figure 3.4. Guvnor Connection Wizard

Default values appear in the Location, Port, and Repository fields (See the “Guvnor Preferences” section below for details about how to change these default values.) Of course, any of these fields can be edited by typing in the corresponding text box. Drag-and-drop or paste into the Location field of a typical Guvnor repository URL such as:

http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/webdav

Results in the URL being parsed into the respective fields as well. The authentication information (user name and password) can optionally be stored in the Eclipse workbench's key-ring file based on the selection of Save user name and password.

Note:

If the authentication information is not stored in the key-ring, then the EGT uses a session authentication, what means that the credentials supplied are used only for the lifetime of the Eclipse workbench instance.

If authentication information is not stored in the key-ring or the authentication information (key-ring or session) is not valid, the EGT will prompt for authentication information when it has to access the Guvnor repository.

If authentication fails, the EGT will retry once and then issue an authentication failure error.

Tip:

If an authentication failure error occurs, you can retry the same operation and supply different authentication information.

Note that the EGT calls the Guvnor repository at various times, such as when determining if resource updates are available. Thus if you use session authentication, the authentication dialog will appear at different times during the Eclipse workbench session, depending on what actions you take. For ease of use, we recommend saving the authentication information in the Eclipse key-ring.

Note:

The Eclipse key-ring file is distinct from key-ring files found in some platforms such as Mac OS X and many forms of Linux. Thus, sometimes if you access a Guvnor repository outside the EGT, the key-ring files might become unsynchronized and you will be unexpectedly prompted for authentication in Eclipse. This is nuisance, but your usual credentials should apply in this case.

3.3. Resource from Guvnor Wizard

In addition to the single file drag-and-drop from the Guvnor Repositories view, the EGT also includes a wizard for copying one or more files from a Guvnor repository to the local workspace (and setting the association with the Guvnor repository). This wizard is available from the File > Import > Guvnor > Resource from Guvnor and the File > New > Other > Guvnor > Resource from Guvnor menu items.

Note:

Note that the wizard is identical but appears in both locations to accommodate users who tend to view this functionality as being in either category.

The first page of the wizard asks for the selection of the source Guvnor repository and gives the choice to create a new Guvnor repository connection (in which case the second page is the same as the Guvnor Connection wizard).

Figure 3.5. Resource from Guvnor Wizard

Once the source Guvnor repository is chosen, the wizard prompts for resource selection:

Figure 3.6. Resource Selection

Finally, the target location in the local workspace should be chosen:

Figure 3.7. Choosing the Target Location

On completion the wizard copies the selected files from the Guvnor repository to the local workspace. If a file with the same name already exists in the destination, the wizard uses the Eclipse standard "prompt for rename" dialog:

Figure 3.8. Prompt for Rename Dialog

3.4. Guvnor Repositories View

The Guvnor Repositories view contains tree structures for Guvnor repository contents.

Figure 3.9. Guvnor Repositories View

You can perform the following actions under the resources in the Guvnor Repositories view:

create a new Guvnor repository connection. How to do this is describe above in the "Guvnor Connection Wizard" section.
remove a Guvnor repository connection. Use the Delete button ( ) in the tool-bar or the Delete option in the context menu to remove a repository connection.
refresh Guvnor repository resorces. Use the Refresh context menu item to reload a tree content for the selected node.
make use of "drill-into" functionality. It's represented by a number of tool-bar/context menu items such as Go Home ( ), Go Back ( ) and Go Into ( ).

Drill-down is useful when working with deeply nested tree structures and when you wish to concentrate on only branch of the tree. For example, drilling into the "defaultPackage" node changes the tree view to:

Figure 3.10. Going Into the "defaultPackage"

Clicking on the Go Home button ( ) or selecting Go Home in the context menu returns the tree to the top-level structure shown in the previous picture above.

There are a number of operations that can be performed on Guvnor repository files. Selecting a file in the Guvnor repository causes the Eclipse Properties view to update with details about that file:

Figure 3.11. Guvnor Repository Files Properties

3.5. Guvnor Resource History View

The Guvnor Resource History view should details about revision history for selected files, both local and those in Guvnor repositories. The initial state of this view is shown on the figure below.

Figure 3.12. Initial State of the Guvnor Resource History View

The Guvnor Resource History view is populated by Show History actions in either the local Guvnor context menu or in the context menu for a Guvnor repository file in the Guvnor Repositories view. Once this action is performed, the Guvnor Resource History view updates to show the revision history:

Figure 3.13. Guvnor Resource History View

Here we see that the file test.txt has seven revisions. Double clicking on a revision row (or the context menu Open (Read only)) opens an Eclipse read-only editor with the revision contents.

Figure 3.14. Eclipse Read-only Editor with the Revision Contents

Note:

You can also use the Save As... option when a file is open in a read-only editor to save a local writable copy of the contents. Doing so, however, will not associate the file created with its Guvnor source.