# Lambda function עם environment-aware configuration
import json
import boto3
import os
from functools import lru_cache

# Warm cache — נטען פעם אחת לכל container lifecycle
@lru_cache(maxsize=1)
def get_db_connection():
    """Connection pool שנשמר בין invocations חמות"""
    import psycopg2
    return psycopg2.connect(
        host=os.environ["DB_HOST"],
        database=os.environ["DB_NAME"],
        user=os.environ["DB_USER"],
        password=get_secret("db-password"),
        connect_timeout=5
    )

def get_secret(secret_name: str) -> str:
    client = boto3.client("secretsmanager")
    response = client.get_secret_value(SecretId=secret_name)
    return response["SecretString"]

def handler(event, context):
    """
    Lambda handler — API Gateway proxy integration
    """
    http_method = event.get("httpMethod", "")
    path = event.get("path", "")
    body = json.loads(event.get("body") or "{}")

    try:
        conn = get_db_connection()
        with conn.cursor() as cur:
            cur.execute(
                "SELECT id, name, email FROM users WHERE id = %s",
                (body.get("user_id"),)
            )
            user = cur.fetchone()

        if not user:
            return {"statusCode": 404, "body": json.dumps({"error": "User not found"})}

        return {
            "statusCode": 200,
            "headers": {"Content-Type": "application/json"},
            "body": json.dumps({"id": user[0], "name": user[1], "email": user[2]})
        }

    except Exception as e:
        print(f"Error: {e}")
        return {"statusCode": 500, "body": json.dumps({"error": "Internal error"})}
Compute — EC2, Lambda, Cloud Functions, App Engine

Compute — EC2, Lambda, Cloud Functions, App Engine

Compute — EC2, Lambda, Cloud Functions, App Engine
