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Palantír: Raising Awareness among Configuration Management Workspaces

This presentation discusses the importance of awareness among developers in configuration management workspaces, including topics such as good vs. bad isolation, optimistic vs. pessimistic locking, and direct vs. indirect conflicts. The Palantír tool is introduced as a non-intrusive solution that integrates with existing SCM systems, providing notification of others' changes and promoting good isolation.

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Palantír: Raising Awareness among Configuration Management Workspaces

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  1. Palantír: Raising Awareness among Configuration Management Workspaces Anita Sarma, Zahra Noroozi, André van der Hoek (Presented by Justin Erenkrantz)

  2. Introduction • How do other people’s pending changes affect me? • Awareness amongst developers • Good vs. bad isolation • Optimistic vs. pessimistic locking • Direct vs. indirect conflicts

  3. Approach • Notification of others’ changes • Not a SCM replacement • Plugs-in to existing SCMs • RCS and CVS prototypes created • Designed to be non-intrusive • Inverts information from pull to push • Reliance upon event-based architecture

  4. Populated Unpopulated Synchronized ChangesInProgress ChangesReverted ChangesCommitted Added Removed Renamed Moved SeverityChanged Event model

  5. Specifics • Written in Java • Uses Siena as event platform • Severity factor • How much has changed • Computed by contextual diff • Visualization ability

  6. Non-obtrusive Multiple SCM systems Scalable Promotes good isolation Non-modelable events? CVS renames Dealing with changeset SCMs? Indirect conflicts? Strength and Weaknesses

  7. Observations • Initial step in right direction • Good separation from the SCM • Hints at general applicability • What happens when someone does not use the tool? • Does this promote the right type of awareness?

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