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Essentials of Rational ClearCase Module 5: Working with Snapshot Views

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Objectives Upon completing this module, you should be able to:  Create a snapshot view  Work in a snapshot view  Resolve hijacked files  Edit load rules

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Types of Views — Review

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Use a Snapshot View When  You are using ClearCase LT  Your computer OS does not support dynamic views  You want to work offline  You want to access a view from a computer that is not a ClearCase host  You want to optimize build performance  Your project does not require ClearCase build auditing and build avoidance features

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Structure of a Snapshot View — Review

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Locating Your View Storage Directory  Company may have policies about where to locate view storage directories  If you are going to disconnect from the network, the view storage directory must be located on a machine that remains connected to the network

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Load Rules  Part of the config spec  Determine which elements are copied into the snapshot view

Base config spec selects particular versions of the loaded elements

Load rules select elements to load

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Updating a Snapshot View Periodically update your snapshot view to load the most recent versions of elements.

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Developer Workflow: Working Offline

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Creating a Snapshot View

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Creating a Snapshot View (cont.) 1 Enter the directory where the view will be located. 2 Click to change the location of the view storage directory.

3 Type path or browse for view storage location, and then click OK.

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Creating a Snapshot View (cont.)

5 (Optional) Click to view and edit the view config spec.

4 Click Finish.

6 Click OK to launch the VOB namespace browser, which allows you to load the view. 12

Creating a Snapshot View: Loading Elements

Select the elements you want to load to the view, and then click Add or Add All. You can load directories or individual files.

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Updating the Snapshot View Update your view before you disconnect to load the most up-to-date versions of elements.

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Checking Out Files Check out the files you want to work on.

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Disconnecting from the Network Before disconnecting, disable the ClearCase shortcut from Windows Explorer.

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Working on Files Read-only copies of loaded files are on your local drive. When checked out, the copies become read/write.

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Hijacking Files  A hijacked file is a loaded file that you modify without checking out  To hijack a file, clear the read-only attribute in file Properties dialog box

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Reconnecting to the Network When you reconnect to the network, reactivate the Windows Explorer integration.

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Updating the View Update your view before you check in files.

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Snapshot View Update Window

The Snapshot View Update window provides an update report.

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Resolving Hijacked Files When you update the view, you are alerted to any hijacked files.

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Resolving Hijacked Files (cont.) When resolving hijacked files, you can: • Check out the hijacked file to save the modifications made while disconnected • Undo the hijack to restore the loaded version and OVERWRITE offline modifications • Compare the hijacked file with another version

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Resolving Hijacked Files (cont.) You can also configure the Update Tool to automatically deal with hijacked files.

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Checking In Files after Resolving Hijacked Files Once you have resolved hijacked files, check in files.

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Changing Elements Loaded into a Snapshot View Edit load rules from the Load Rules tab of View Properties.

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Working in a Snapshot View While Connected Snapshot views can also be used while you are connected to the network.  Hijacking files is unnecessary  Remember to update the view regularly

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Module Review  When might you choose to use a snapshot view?  What are load rules?  What does it mean to update a view?  What is a hijacked file?  How do you resolve hijacked files?  How do you change the elements loaded into your snapshot view?

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Module Lab  In this lab, you perform the following tasks:  Create a snapshot view and load elements  Work in a snapshot view  Disconnect from the network  Hijack a file  Update view  Resolve a hijacked file

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