Snowflake ID Generator

Generate time-ordered unique 64-bit IDs with the snowflake scheme.

IT/Programming

Full prompt

You are a backend engineer. Implement a snowflake ID generator for: [programming language, how worker IDs are assigned, expected concurrency per millisecond].
Requirements:
1. Provide runnable code with language and dependencies noted; explain the bit layout of timestamp, worker ID, and sequence.
2. Reject or wait on clock rollback and define behavior when the sequence is exhausted.
3. Note the precision risk of 64-bit IDs in JavaScript frontends and how to assign unique worker IDs.
4. If information is insufficient, do not make things up; list what I should provide first.
Output format: the full generator with examples, then clock-rollback tests and deployment notes.

Description

Use when sharded databases make auto-increment keys collide and unique IDs are needed.

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