技能檔案

Redis Patterns

Name: Redis Patterns
Author: JuaniSarmiento

Redis usage patterns for the restaurant platform — Pub/Sub channels, Streams with consumer groups, outbox pattern, rate limiting, token blacklist, and caching strategies. Trigger: When working on Redis integration, Pub/Sub, Streams, outbox events, rate limiting, token blacklist, or cache invalidation.

JuaniSarmiento0 星標2026年3月19日

職業
分類: NoSQL 數據庫

技能內容

When to Use

Implementing or modifying Redis Pub/Sub channels or Streams
Working on the outbox pattern for guaranteed event delivery
Implementing rate limiting with Lua scripts
Managing token blacklists
Adding or modifying cache layers (sector, menu, cross-reaction)

Critical Patterns

Pub/Sub Channels

Channel Pattern	Purpose
`branch:{id}:waiters`	All waiters in a branch
`branch:{id}:kitchen`	Kitchen staff in a branch
`branch:{id}:admin`	Admins in a branch
`session:{id}:diners`	Diners in a dining session
`sector:{id}:waiters`	Waiters assigned to a sector

Message format (JSON):

相關技能

Redis Patterns | Skills Pool

{
  "type": "EVENT_TYPE",
  "tenant_id": "uuid",
  "branch_id": "uuid",
  "payload": {},
  "timestamp": "ISO-8601"
}

Column	Type	Notes
`id`	UUID	PK
`tenant_id`	UUID	Tenant scope
`event_type`	string	Event discriminator
`payload`	JSONB	Event data
`status`	enum	`PENDING` → `PROCESSING` → `PUBLISHED`
`created_at`	timestamp	Insertion time
`processed_at`	timestamp	Nullable, set on publish
`attempts`	int	Max 5

Parameter	Value
Delivery guarantee	At-least-once
Max retries	3 → then DLQ
Pending claim threshold	30s (covers crashed consumers)
On restart	Process pending messages first

Parameter	Value
Algorithm	Sliding window
Key pattern	`rate_limit:{connection_id}`
Max tracked connections	2,000
Eviction	Oldest 10% at limit

Parameter	Value
Key pattern	`blacklist:{token_jti}`
TTL	Token's remaining lifetime
Fail mode	Fail-closed — Redis unreachable → ALL tokens rejected

Cache	TTL	Max Entries	Invalidation
Sector cache	60s	1,000	TTL expiry
Menu cache	5min	—	On product/category change
Cross-reaction cache	5min	—	TTL expiry

Redis Patterns

When to Use

Critical Patterns

Pub/Sub Channels

Redis Patterns

When to Use

Critical Patterns

Pub/Sub Channels

Streams — Guaranteed Delivery

Outbox Pattern

Rate Limiting — Lua Script

Token Blacklist

Caching Strategies

Vector Index Tuning

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