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In-memory database for managing user identities

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go-identity

Overview

This purpose is a library for the managing user identities for applications. The core of the library is User and Database data structures.

The User data structure captures the dynamics of user identities in the United States.

The Database data strcuture allows managing these identities. Currently, the Database provides a way of managing local users for a web application.

The key concurrency features of the Database are:

  • Only one Go routine is allowed making modifications to users at a time. During that time, the entire database locks.
  • Keeps user identities in Users slice of the Database data structure. The elements of the slice are pointers of User data structure The slice only grows in size.
  • Keeps references to user identities in a number hashes for faster lookup. The keys in the hashes are strings and the value is either a single pointer to User or a slice of pointers to User instances. If a reference keeps unique values, then it is a single pointer, e.g. username. Otherwise, e.g. in the case of being a part of a company, it is a slice.

The following keys are unique across the database:

  • ID
  • Username
  • EmailAddress: a user can have multiple emails, but the emails must be unique across the database.