Identity Maps
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What is Identity Maps?
Identity Maps is a pattern used in enterprise application development to maintain a map of objects that have been loaded from the database, keyed by their unique identifier. It is used to ensure that multiple copies of the same object are not created in memory when the same data is accessed multiple times.
The identity map pattern is typically used in conjunction with an ORM (Object-Relational Mapping) tool. When an object is loaded from the database, it is first checked against the identity map to see if it has already been loaded. If it has, the existing object is returned, instead of creating a new copy.
Free resources to learn Identity Maps
More in stage 13: Enterprise Patterns
Identity Maps: common questions
Can I learn Identity Maps in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Identity Maps in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Identity Maps tutorial for beginners?
It is lesson 85 of 94 in the free Software Design and Architecture roadmap, in stage 13, Enterprise Patterns. If you are new to Software Design and Architecture, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.