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# Superclient Python

A Python library for automatically optimizing Kafka producer configurations based on topic-specific recommendations.

## Overview

Superstream Clients works as a Python import hook that intercepts Kafka producer creation and applies optimized configurations without requiring any code changes in your application. It dynamically retrieves optimization recommendations from Superstream and applies them based on impact analysis.

## Supported Libraries

Works with any Python library that implements Kafka producers, including:

- kafka-python
- aiokafka
- confluent-kafka
- Faust
- FastAPI event publishers
- Celery Kafka backends
- Any custom wrapper around these Kafka clients

## Features

- **Zero-code integration**: No code changes required in your application
- **Dynamic configuration**: Applies optimized settings based on topic-specific recommendations
- **Intelligent optimization**: Identifies the most impactful topics to optimize
- **Graceful fallback**: Falls back to default settings if optimization fails
- **Minimal overhead**: Uses a single lightweight background thread (or async coroutine for aiokafka)

## Important: Producer Configuration Requirements

When initializing your Kafka producers, please ensure you pass the configuration as a mutable object. The Superstream library needs to modify the producer configuration to apply optimizations. The following initialization patterns are supported:

✅ **Supported (Recommended)**:
```python
# Using kafka-python
from kafka import KafkaProducer
producer = KafkaProducer(
    bootstrap_servers=['localhost:9092'],
    compression_type='snappy',
    batch_size=16384
)

# Using aiokafka
from aiokafka import AIOKafkaProducer
producer = AIOKafkaProducer(
    bootstrap_servers='localhost:9092',
    compression_type='snappy',
    batch_size=16384
)

# Using confluent-kafka
from confluent_kafka import Producer
producer = Producer({
    'bootstrap.servers': 'localhost:9092',
    'compression.type': 'snappy',
    'batch.size': 16384
})
```

❌ **Not Supported**:
```python
# Using frozen dictionaries or immutable configurations
from types import MappingProxyType
config = MappingProxyType({
    'bootstrap.servers': 'localhost:9092'
})
producer = KafkaProducer(**config)
```

### Why This Matters
The Superstream library needs to modify your producer's configuration to apply optimizations based on your cluster's characteristics. This includes adjusting settings like compression, batch size, and other performance parameters. When the configuration is immutable, these optimizations cannot be applied.

## Installation

```bash
pip install superclient && python -m superclient install_pth
```

That's it! Superclient will now automatically load and optimize all Kafka producers in your Python environment.

## Usage

After installation, superclient works automatically. Just use your Kafka clients as usual:

```python
# kafka-python
from kafka import KafkaProducer
producer = KafkaProducer(bootstrap_servers='localhost:9092')
# Automatically optimized!

# confluent-kafka
from confluent_kafka import Producer
producer = Producer({'bootstrap.servers': 'localhost:9092'})
# Automatically optimized!

# aiokafka
from aiokafka import AIOKafkaProducer
producer = AIOKafkaProducer(bootstrap_servers='localhost:9092')
# Automatically optimized!
```

### Docker Integration

When using Superstream Clients with containerized applications, include the package in your Dockerfile:

```dockerfile
FROM python:3.8-slim

# Install superclient
RUN pip install superclient
RUN python -m superclient install_pth

# Your application code
COPY . /app
WORKDIR /app

# Run your application
CMD ["python", "your_app.py"]
```

### Required Environment Variables

- `SUPERSTREAM_TOPICS_LIST`: Comma-separated list of topics your application produces to

### Optional Environment Variables

- `SUPERSTREAM_LATENCY_SENSITIVE`: Set to "true" to prevent any modification to linger.ms values
- `SUPERSTREAM_DISABLED`: Set to "true" to disable optimization
- `SUPERSTREAM_DEBUG`: Set to "true" to enable debug logs

Example:
```bash
export SUPERSTREAM_TOPICS_LIST=orders,payments,user-events
export SUPERSTREAM_LATENCY_SENSITIVE=true
```

## Prerequisites

- Python 3.8 or higher
- Kafka cluster that is connected to the Superstream's console
- Read and write permissions to the `superstream.*` topics

## License

Apache License 2.0 