kiarina-lib-redis 1.4.0

Redis client library for kiarina namespace

kiarina-lib-redis

A Python client library for Redis with configuration management and connection pooling.

Features

• Configuration Management: Use pydantic-settings-manager for flexible configuration
• Connection Pooling: Automatic connection caching and reuse
• Retry Support: Built-in retry mechanism for connection failures
• Sync & Async: Support for both synchronous and asynchronous operations
• Type Safety: Full type hints and Pydantic validation

Installation

pip install kiarina-lib-redis

Quick Start

Basic Usage (Sync)

from kiarina.lib.redis import get_redis

# Get a Redis client with default settings
redis = get_redis()

# Basic operations
redis.set("key", "value")
value = redis.get("key")
print(value)  # b'value'

# With decode_responses=True for string values
redis = get_redis(decode_responses=True)
redis.set("key", "value")
value = redis.get("key")
print(value)  # 'value'

Async Usage

from kiarina.lib.redis.asyncio import get_redis

async def main():
    # Get an async Redis client
    redis = get_redis(decode_responses=True)

    # Basic operations
    await redis.set("key", "value")
    value = await redis.get("key")
    print(value)  # 'value'

Configuration

This library uses pydantic-settings-manager for flexible configuration management.

Environment Variables

Configure the Redis connection using environment variables:

# Redis connection URL
export KIARINA_LIB_REDIS_URL="redis://localhost:6379"

# Enable retry mechanism
export KIARINA_LIB_REDIS_USE_RETRY="true"

# Timeout settings
export KIARINA_LIB_REDIS_SOCKET_TIMEOUT="6.0"
export KIARINA_LIB_REDIS_SOCKET_CONNECT_TIMEOUT="3.0"

# Retry settings
export KIARINA_LIB_REDIS_RETRY_ATTEMPTS="3"
export KIARINA_LIB_REDIS_RETRY_DELAY="1.0"

Programmatic Configuration

from kiarina.lib.redis import settings_manager

# Configure for multiple environments
settings_manager.user_config = {
    "development": {
        "url": "redis://localhost:6379",
        "use_retry": True,
        "retry_attempts": 3
    },
    "production": {
        "url": "redis://prod-server:6379",
        "use_retry": True,
        "retry_attempts": 5,
        "socket_timeout": 10.0
    }
}

# Switch to production configuration
settings_manager.active_key = "production"
redis = get_redis()

Runtime Overrides

from kiarina.lib.redis import get_redis

# Override settings at runtime
redis = get_redis(
    url="redis://custom-server:6379",
    use_retry=True,
    decode_responses=True
)

Advanced Usage

Connection Caching

from kiarina.lib.redis import get_redis

# These will return the same cached connection
redis1 = get_redis()
redis2 = get_redis()
assert redis1 is redis2

# Use different cache keys for separate connections
redis3 = get_redis(cache_key="secondary")
assert redis1 is not redis3

Custom Configuration Keys

from kiarina.lib.redis import settings_manager, get_redis

# Configure multiple named configurations
settings_manager.user_config = {
    "cache": {
        "url": "redis://cache-db:6379",
        "socket_timeout": 5.0
    },
    "session": {
        "url": "redis://session-db:6379",
        "socket_timeout": 10.0
    }
}

# Use specific configurations
cache_redis = get_redis("cache")
session_redis = get_redis("session")

Error Handling and Retries

from kiarina.lib.redis import get_redis
import redis

# Enable automatic retries for connection issues
redis_client = get_redis(use_retry=True)

try:
    redis_client.set("key", "value")
    value = redis_client.get("key")
except redis.ConnectionError as e:
    print(f"Connection failed: {e}")
except redis.TimeoutError as e:
    print(f"Operation timed out: {e}")

Configuration Reference

Setting	Environment Variable	Default	Description
url	KIARINA_LIB_REDIS_URL	"redis://localhost:6379"	Redis connection URL
use_retry	KIARINA_LIB_REDIS_USE_RETRY	false	Enable automatic retries
socket_timeout	KIARINA_LIB_REDIS_SOCKET_TIMEOUT	6.0	Socket timeout in seconds
socket_connect_timeout	KIARINA_LIB_REDIS_SOCKET_CONNECT_TIMEOUT	3.0	Connection timeout in seconds
health_check_interval	KIARINA_LIB_REDIS_HEALTH_CHECK_INTERVAL	60	Health check interval in seconds
retry_attempts	KIARINA_LIB_REDIS_RETRY_ATTEMPTS	3	Number of retry attempts
retry_delay	KIARINA_LIB_REDIS_RETRY_DELAY	1.0	Delay between retries in seconds

URL Formats

Redis URLs support the following formats:

• redis://localhost:6379 - Basic connection
• redis://username:password@localhost:6379 - With authentication
• rediss://localhost:6379 - SSL/TLS connection
• rediss://username:password@localhost:6379 - SSL/TLS with authentication
• redis://localhost:6379/0 - Specify database number
• unix:///path/to/socket.sock - Unix socket connection

Development

Prerequisites

• Python 3.12+
• Docker (for running Redis in tests)

Setup

# Clone the repository
git clone https://github.com/kiarina/kiarina-python.git
cd kiarina-python

# Setup development environment (installs tools, syncs dependencies, downloads test data)
mise run setup

# Start Redis for testing
docker compose up -d redis

Running Tests

# Run format, lint, type checks and tests
mise run package kiarina-lib-redis

# Coverage report
mise run package:test kiarina-lib-redis --coverage

# Run specific tests
uv run --group test pytest packages/kiarina-lib-redis/tests/test_sync.py
uv run --group test pytest packages/kiarina-lib-redis/tests/test_async.py

Dependencies

• redis - Redis client for Python
• pydantic-settings - Settings management
• pydantic-settings-manager - Advanced settings management

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contributing

This is a personal project, but contributions are welcome! Please feel free to submit issues or pull requests.

Related Projects

• kiarina-python - The main monorepo containing this package
• Redis - The in-memory data structure store this library connects to
• pydantic-settings-manager - Configuration management library used by this package