Dmitry Dementiev
32f4fee41c
- Зачем: - генератор должен создавать учебно полезный визит с общим click_id, правдоподобным путём и честным тиковым бюджетом событий. - Что: - добавлена марковская цепочка страниц, запланированные метки времени и потолок GEN_MAX_SESSION_EVENTS. - добавлен набор тикового батча из нескольких визитов до рассчитанного бюджета событий. - обновлены тесты, README, KNOWN_ISSUES и статусы задач 01/02. - Проверка: - uv run --with pytest --with-requirements generator/requirements.txt pytest generator/tests -q
1176 lines
46 KiB
Python
1176 lines
46 KiB
Python
#!/usr/bin/env python3
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"""
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Автономный генератор событий для Kafka (MVP rev5).
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Режим 'steady-stream': публикуем постепенно, короткими тиками (1-10 сек),
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держим целевую интенсивность events/min без крупных минутных batch.
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"""
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import json
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import logging
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import math
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import os
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import random
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import sys
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import time
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import uuid
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from dataclasses import dataclass, field
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from datetime import datetime, timedelta, timezone
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from pathlib import Path
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from typing import Any
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# Prometheus метрики
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from prometheus_client import Counter, Gauge, Histogram, start_http_server
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# Kafka импортируем lazy для возможности тестирования без Kafka
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_kafka_imported = False
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KafkaProducer = None
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KafkaError = None
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def _import_kafka():
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global _kafka_imported, KafkaProducer, KafkaError
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if not _kafka_imported:
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from kafka import KafkaProducer
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from kafka.errors import KafkaError
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_kafka_imported = True
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return KafkaProducer, KafkaError
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# ---------------------------------------------------------------------------
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# Настройка логирования
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# ---------------------------------------------------------------------------
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logging.basicConfig(
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level=logging.INFO,
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format="%(asctime)s - %(levelname)s - %(message)s",
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datefmt="%Y-%m-%d %H:%M:%S",
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)
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logger = logging.getLogger("generator")
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# ---------------------------------------------------------------------------
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# Prometheus метрики
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# ---------------------------------------------------------------------------
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METRICS_EVENTS_TOTAL = Counter(
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"generator_events_total",
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"Total number of events sent to Kafka",
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["topic"]
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)
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METRICS_ERRORS_TOTAL = Counter(
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"generator_publish_errors_total",
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"Total number of publish errors",
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["topic"]
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)
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METRICS_TICK_DURATION = Histogram(
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"generator_tick_duration_seconds",
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"Duration of generator tick in seconds"
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)
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METRICS_LAST_SUCCESS = Gauge(
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"generator_last_success_timestamp",
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"Unix timestamp of last successful tick"
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)
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PAGE_START_DISTRIBUTION = [
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("/home", 0.59),
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("/product_a", 0.20),
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("/product_b", 0.14),
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("/cart", 0.04),
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("/payment", 0.02),
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("/confirmation", 0.01),
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]
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PAGE_TRANSITIONS = {
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"/home": [
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("/home", 0.40),
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("/product_a", 0.28),
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("/product_b", 0.18),
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("/cart", 0.04),
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(None, 0.10),
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],
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"/product_a": [
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("/home", 0.30),
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("/product_a", 0.16),
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("/product_b", 0.18),
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("/cart", 0.27),
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(None, 0.09),
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],
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"/product_b": [
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("/home", 0.32),
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("/product_a", 0.15),
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("/product_b", 0.18),
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("/cart", 0.27),
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(None, 0.08),
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],
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"/cart": [
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("/home", 0.20),
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("/product_a", 0.12),
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("/product_b", 0.10),
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("/cart", 0.10),
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("/payment", 0.42),
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(None, 0.06),
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],
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"/payment": [
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("/home", 0.12),
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("/cart", 0.24),
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("/payment", 0.12),
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("/confirmation", 0.38),
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(None, 0.14),
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],
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"/confirmation": [
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("/home", 0.35),
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("/product_a", 0.15),
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("/product_b", 0.10),
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("/confirmation", 0.05),
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(None, 0.35),
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],
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}
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# ---------------------------------------------------------------------------
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# Конфигурация через env
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# ---------------------------------------------------------------------------
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@dataclass(frozen=True)
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class Config:
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"""Конфигурация генератора из переменных окружения."""
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# Подключение к Kafka
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kafka_bootstrap_servers: str = field(
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default_factory=lambda: os.getenv("KAFKA_BOOTSTRAP_SERVERS", "kafka:29092")
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)
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# Параметры генерации
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tick_seconds: int = field(
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default_factory=lambda: int(os.getenv("GEN_TICK_SECONDS", "5"))
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)
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lambda_base_per_min: int = field(
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default_factory=lambda: int(os.getenv("GEN_LAMBDA_BASE_PER_MIN", "200"))
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)
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jitter_pct: int = field(
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default_factory=lambda: int(os.getenv("GEN_JITTER_PCT", "20"))
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)
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min_events_per_tick: int = field(
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default_factory=lambda: int(os.getenv("GEN_MIN_EVENTS_PER_TICK", "5"))
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)
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max_events_per_tick: int = field(
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default_factory=lambda: int(os.getenv("GEN_MAX_EVENTS_PER_TICK", "50"))
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)
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max_session_events: int = field(
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default_factory=lambda: int(os.getenv("GEN_MAX_SESSION_EVENTS", "30"))
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)
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# Пути к данным
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data_dir: Path = field(
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default_factory=lambda: Path(os.getenv("GEN_DATA_DIR", "/data"))
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)
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# Сид для воспроизводимости
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seed: int | None = field(
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default_factory=lambda: int(os.getenv("GEN_SEED"))
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if os.getenv("GEN_SEED")
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else None
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)
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# Включение/выключение генерации
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enabled: bool = field(
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default_factory=lambda: os.getenv("GEN_ENABLED", "true").lower() == "true"
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)
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# Порт для Prometheus метрик
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metrics_port: int = field(
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default_factory=lambda: int(os.getenv("GEN_METRICS_PORT", "9109"))
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)
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# Управление сохранением состояния
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state_enabled: bool = field(
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default_factory=lambda: os.getenv("GEN_STATE_ENABLED", "true").lower() == "true"
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)
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state_reset: bool = field(
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default_factory=lambda: os.getenv("GEN_STATE_RESET", "false").lower() == "true"
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)
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def __post_init__(self):
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# Валидация параметров
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if self.tick_seconds < 1:
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raise ValueError("GEN_TICK_SECONDS must be >= 1")
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if self.lambda_base_per_min < 1:
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raise ValueError("GEN_LAMBDA_BASE_PER_MIN must be >= 1")
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if self.max_session_events < 1:
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raise ValueError("GEN_MAX_SESSION_EVENTS must be >= 1")
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if not self.data_dir.exists():
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raise ValueError(f"Data directory does not exist: {self.data_dir}")
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# ---------------------------------------------------------------------------
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# Загрузка базового словаря событий
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# ---------------------------------------------------------------------------
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@dataclass
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class EventDictionary:
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"""Базовый словарь событий из JSONL файлов."""
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browser_events: list[dict[str, Any]]
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location_events: list[dict[str, Any]]
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device_events: list[dict[str, Any]]
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geo_events: list[dict[str, Any]]
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# Индексы для быстрого поиска
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browser_by_click_id: dict[str, list[dict]] = field(default_factory=dict)
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location_by_event_id: dict[str, dict] = field(default_factory=dict)
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device_by_click_id: dict[str, dict] = field(default_factory=dict)
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geo_by_click_id: dict[str, dict] = field(default_factory=dict)
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def __post_init__(self):
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# Строим индексы для связности
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for browser in self.browser_events:
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self.browser_by_click_id.setdefault(browser["click_id"], []).append(browser)
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for loc in self.location_events:
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self.location_by_event_id[loc["event_id"]] = loc
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for dev in self.device_events:
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self.device_by_click_id[dev["click_id"]] = dev
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for geo in self.geo_events:
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self.geo_by_click_id[geo["click_id"]] = geo
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@classmethod
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def load(cls, data_dir: Path) -> "EventDictionary":
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"""Загружает события из JSONL файлов."""
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logger.info(f"Loading event dictionary from {data_dir}")
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def load_jsonl(filename: str) -> list[dict]:
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path = data_dir / filename
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events = []
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with open(path, "r", encoding="utf-8") as f:
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for line in f:
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line = line.strip()
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if line:
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events.append(json.loads(line))
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logger.info(f" Loaded {len(events)} events from {filename}")
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return events
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browser_events = load_jsonl("browser_events.jsonl")
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location_events = load_jsonl("location_events.jsonl")
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device_events = load_jsonl("device_events.jsonl")
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geo_events = load_jsonl("geo_events.jsonl")
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if not browser_events:
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raise ValueError("browser_events.jsonl is empty or missing")
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return cls(
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browser_events=browser_events,
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location_events=location_events,
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device_events=device_events,
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geo_events=geo_events,
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)
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# ---------------------------------------------------------------------------
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# Генерация событий
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# ---------------------------------------------------------------------------
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class EventGenerator:
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"""Генератор событий с сохранением связности."""
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def __init__(self, dictionary: EventDictionary, config: Config):
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self.dictionary = dictionary
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self.config = config
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self.rng = random.Random(config.seed)
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def _new_uuid(self) -> str:
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"""Генерирует новый UUID."""
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return str(uuid.uuid4())
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def _current_timestamp(self) -> str:
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"""Возвращает текущую метку времени в формате JSONL."""
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return datetime.now(timezone.utc).strftime("%Y-%m-%d %H:%M:%S.%f")
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def _format_timestamp(self, timestamp: datetime) -> str:
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"""Форматирует запланированную метку времени для JSONL."""
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return timestamp.strftime("%Y-%m-%d %H:%M:%S.%f")
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def _weighted_choice(self, choices: list[tuple[Any, float]]) -> Any:
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"""Разыгрывает значение по списку весов."""
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point = self.rng.random()
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cumulative = 0.0
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for value, weight in choices:
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cumulative += weight
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if point < cumulative:
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return value
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return choices[-1][0]
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def _generate_visit_path(self, max_events: int, min_events: int = 1) -> list[str]:
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"""Генерирует путь визита по страницам с защитой от бесконечных петель."""
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page = self._weighted_choice(PAGE_START_DISTRIBUTION)
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path = []
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while page is not None and len(path) < max_events:
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path.append(page)
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page = self._weighted_choice(PAGE_TRANSITIONS[page])
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while len(path) < min_events and len(path) < max_events:
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transitions = [
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(next_page, weight)
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for next_page, weight in PAGE_TRANSITIONS[path[-1]]
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if next_page is not None
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]
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path.append(self._weighted_choice(transitions))
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return path
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def _visit_pause_seconds(self) -> float:
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"""Разыгрывает паузу между событиями визита."""
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pause = self.rng.lognormvariate(math.log(45.0), 1.0)
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return max(1.0, min(pause, 29 * 60.0))
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def _hour_factor(self) -> float:
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"""Возвращает коэффициент интенсивности в зависимости от часа дня."""
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hour = datetime.now(timezone.utc).hour
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# Дневное окно (9-18): 1.2
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# Ночное окно (0-5): 0.7
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# Остальное время: 1.0
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if 9 <= hour <= 18:
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return 1.2
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elif 0 <= hour <= 5:
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return 0.7
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return 1.0
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def _calculate_events_count(self) -> int:
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"""Вычисляет количество событий для текущего тика (Poisson + jitter)."""
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# Базовая интенсивность с учётом часа
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lambda_minute = self.config.lambda_base_per_min * self._hour_factor()
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# Масштабируем на длительность тика
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lambda_tick = lambda_minute * (self.config.tick_seconds / 60.0)
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# Генерируем Poisson
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count = 0
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L = math.exp(-lambda_tick)
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p = 1.0
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while p > L:
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p *= self.rng.random()
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count += 1
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count -= 1
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# Применяем jitter (вариативность)
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if self.config.jitter_pct > 0:
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jitter_factor = 1.0 + self.rng.uniform(
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-self.config.jitter_pct / 100.0,
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self.config.jitter_pct / 100.0
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)
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count = int(count * jitter_factor)
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# Применяем границы
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count = max(self.config.min_events_per_tick, min(count, self.config.max_events_per_tick))
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return count
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def generate_batch(self, batch_size: int) -> dict[str, list[dict]]:
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"""
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Генерирует один визит с сохранением связей.
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Возвращает словарь {topic: [events]}
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"""
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if not self.dictionary.browser_events:
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logger.warning("Event dictionary is empty, skipping batch generation")
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return {
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"browser_events": [],
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"location_events": [],
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"device_events": [],
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"geo_events": [],
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}
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batch = {
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"browser_events": [],
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"location_events": [],
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"device_events": [],
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"geo_events": [],
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}
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if batch_size <= 0:
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return batch
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max_visit_events = min(batch_size, self.config.max_session_events)
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min_visit_events = min(2, max_visit_events)
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visit_path = self._generate_visit_path(max_visit_events, min_visit_events)
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visit_candidates = [
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click_id for click_id, browser_events in self.dictionary.browser_by_click_id.items()
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if (
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len(browser_events) >= len(visit_path)
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and click_id in self.dictionary.device_by_click_id
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and click_id in self.dictionary.geo_by_click_id
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and all(
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event["event_id"] in self.dictionary.location_by_event_id
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for event in browser_events[:len(visit_path)]
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)
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)
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]
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if visit_candidates:
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base_click_id = self.rng.choice(visit_candidates)
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base_browser_events = self.dictionary.browser_by_click_id[base_click_id][:len(visit_path)]
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else:
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# Крайний случай для очень малого сида: сохраняем форму визита,
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# даже если приходится брать события с повторением.
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base_browser = self.rng.choice(self.dictionary.browser_events)
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base_click_id = base_browser["click_id"]
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base_browser_events = [base_browser for _ in range(len(visit_path))]
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base_device = self.dictionary.device_by_click_id.get(base_click_id)
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base_geo = self.dictionary.geo_by_click_id.get(base_click_id)
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new_click_id = self._new_uuid()
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planned_timestamp = datetime.now(timezone.utc)
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for base_browser, page_url_path in zip(base_browser_events, visit_path):
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base_location = self.dictionary.location_by_event_id.get(base_browser["event_id"])
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# Генерируем новые ID
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new_event_id = self._new_uuid()
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new_timestamp = self._format_timestamp(planned_timestamp)
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# Создаём новое браузерное событие
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browser_event = {
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**base_browser,
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"event_id": new_event_id,
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"click_id": new_click_id,
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"event_timestamp": new_timestamp,
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}
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batch["browser_events"].append(browser_event)
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# Связанное location событие
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if base_location:
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location_event = {
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**base_location,
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"event_id": new_event_id,
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"page_url": f"http://www.dummywebsite.com{page_url_path}",
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"page_url_path": page_url_path,
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}
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batch["location_events"].append(location_event)
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# Связанное device событие
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if base_device:
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device_event = {
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**base_device,
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"click_id": new_click_id,
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}
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batch["device_events"].append(device_event)
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# Связанное geo событие
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if base_geo:
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geo_event = {
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**base_geo,
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"click_id": new_click_id,
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}
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batch["geo_events"].append(geo_event)
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planned_timestamp += timedelta(seconds=self._visit_pause_seconds())
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return batch
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def generate_tick_batch(self, event_budget: int) -> dict[str, list[dict]]:
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"""
|
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Генерирует батч тика из одного или нескольких визитов.
|
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`generate_batch()` остаётся публичным срезом одного визита. Для тика
|
||
нужно набрать рассчитанный бюджет событий, поэтому здесь несколько
|
||
визитов объединяются в один набор записей для публикации.
|
||
"""
|
||
tick_batch = {
|
||
"browser_events": [],
|
||
"location_events": [],
|
||
"device_events": [],
|
||
"geo_events": [],
|
||
}
|
||
|
||
remaining_events = event_budget
|
||
while remaining_events > 0:
|
||
visit_batch = self.generate_batch(remaining_events)
|
||
generated_events = len(visit_batch["browser_events"])
|
||
if generated_events == 0:
|
||
break
|
||
|
||
for topic, events in visit_batch.items():
|
||
tick_batch[topic].extend(events)
|
||
remaining_events -= generated_events
|
||
|
||
return tick_batch
|
||
|
||
|
||
# ---------------------------------------------------------------------------
|
||
# Batch record для истории
|
||
# ---------------------------------------------------------------------------
|
||
@dataclass
|
||
class BatchRecord:
|
||
"""Запись об отправленном батче."""
|
||
|
||
batch_id: str
|
||
started_at: datetime
|
||
finished_at: datetime
|
||
sent_total: int
|
||
sent_browser: int
|
||
sent_location: int
|
||
sent_device: int
|
||
sent_geo: int
|
||
status: str # 'success', 'partial', 'error'
|
||
error_message: str | None = None
|
||
|
||
def to_dict(self) -> dict:
|
||
"""Конвертирует в словарь для сериализации."""
|
||
return {
|
||
"batch_id": self.batch_id,
|
||
"started_at": self.started_at.isoformat(),
|
||
"finished_at": self.finished_at.isoformat(),
|
||
"sent_total": self.sent_total,
|
||
"sent_browser": self.sent_browser,
|
||
"sent_location": self.sent_location,
|
||
"sent_device": self.sent_device,
|
||
"sent_geo": self.sent_geo,
|
||
"status": self.status,
|
||
"error_message": self.error_message,
|
||
}
|
||
|
||
|
||
# ---------------------------------------------------------------------------
|
||
# State record для сохранения состояния генератора
|
||
# ---------------------------------------------------------------------------
|
||
def _nested_list_to_tuple(obj):
|
||
"""Рекурсивно преобразует list в tuple (для восстановления RNG state после JSON)."""
|
||
if isinstance(obj, list):
|
||
return tuple(_nested_list_to_tuple(x) for x in obj)
|
||
return obj
|
||
|
||
|
||
@dataclass
|
||
class GeneratorState:
|
||
"""Состояние генератора для восстановления после рестарта.
|
||
|
||
Используем JSON-safe сериализацию:
|
||
- rng_state от random.getstate() - кортеж из простых типов (int, tuple),
|
||
безопасно сериализуется в JSON напрямую без pickle
|
||
"""
|
||
|
||
tick: int
|
||
rng_state: tuple # результат random.getstate() - JSON-serializable
|
||
last_batch_id: str
|
||
last_timestamp: datetime
|
||
version: str = "1.0"
|
||
|
||
def to_dict(self) -> dict:
|
||
"""Конвертирует в словарь для JSON-сериализации."""
|
||
return {
|
||
"tick": self.tick,
|
||
"rng_state": self.rng_state, # tuple из int - JSON-serializable
|
||
"last_batch_id": self.last_batch_id,
|
||
"last_timestamp": self.last_timestamp.isoformat(),
|
||
"version": self.version,
|
||
}
|
||
|
||
@classmethod
|
||
def from_dict(cls, data: dict) -> "GeneratorState":
|
||
"""Создаёт состояние из словаря (JSON-only, без pickle).
|
||
|
||
При невалидном rng_state логирует предупреждение и возвращает None
|
||
(вызывающий код должен обработать как "начать с чистого листа").
|
||
"""
|
||
try:
|
||
rng_state_raw = data.get("rng_state")
|
||
if not rng_state_raw:
|
||
logger.warning("State missing rng_state field")
|
||
raise ValueError("rng_state is missing")
|
||
|
||
rng_state = _nested_list_to_tuple(rng_state_raw)
|
||
|
||
# Валидация: rng_state должен быть tuple и иметь минимальную структуру
|
||
if not isinstance(rng_state, tuple):
|
||
logger.warning(f"rng_state is not tuple: {type(rng_state)}")
|
||
raise ValueError("rng_state must be tuple")
|
||
|
||
if len(rng_state) < 2:
|
||
logger.warning(f"rng_state has insufficient length: {len(rng_state)}")
|
||
raise ValueError("rng_state has insufficient length")
|
||
|
||
# Проверка что можем создать RNG и вызвать setstate (тестовая валидация)
|
||
test_rng = random.Random()
|
||
test_rng.setstate(rng_state)
|
||
|
||
return cls(
|
||
tick=data.get("tick", 0),
|
||
rng_state=rng_state,
|
||
last_batch_id=data.get("last_batch_id", ""),
|
||
last_timestamp=datetime.fromisoformat(data.get("last_timestamp", "1970-01-01T00:00:00+00:00")),
|
||
version=data.get("version", "1.0"),
|
||
)
|
||
except Exception as e:
|
||
logger.warning(f"Invalid state format, will start fresh: {e}")
|
||
raise ValueError(f"Invalid state: {e}")
|
||
|
||
@classmethod
|
||
def from_dict_safe(cls, data: dict) -> "GeneratorState | None":
|
||
"""Безопасная загрузка state с graceful degradation.
|
||
|
||
Returns:
|
||
GeneratorState если данные валидны, иначе None (начать с чистого листа).
|
||
"""
|
||
try:
|
||
return cls.from_dict(data)
|
||
except Exception:
|
||
# Уже залогировано в from_dict
|
||
return None
|
||
|
||
|
||
# ---------------------------------------------------------------------------
|
||
# Kafka state manager - сохраняет/восстанавливает состояние генератора
|
||
# ---------------------------------------------------------------------------
|
||
class KafkaStateManager:
|
||
"""Управление состоянием генератора в Kafka (compact topic)."""
|
||
|
||
STATE_TOPIC = "generator_state"
|
||
STATE_KEY = "default" # Для возможности нескольких генераторов в будущем
|
||
|
||
def __init__(self, bootstrap_servers: str):
|
||
self.bootstrap_servers = bootstrap_servers
|
||
KafkaProducerCls, _ = _import_kafka()
|
||
|
||
logger.info(f"Connecting to Kafka for state management at {self.bootstrap_servers}")
|
||
self.producer = KafkaProducerCls(
|
||
bootstrap_servers=self.bootstrap_servers,
|
||
value_serializer=lambda v: json.dumps(v).encode("utf-8"),
|
||
key_serializer=lambda k: k.encode("utf-8") if k else None,
|
||
retries=3,
|
||
retry_backoff_ms=1000,
|
||
)
|
||
logger.info("Connected to Kafka for state management successfully")
|
||
|
||
def save(self, state: GeneratorState) -> None:
|
||
"""Сохраняет состояние в топик (compact topic - только последнее значение).
|
||
|
||
Использует retry при сбоях подключения к Kafka.
|
||
"""
|
||
value = state.to_dict()
|
||
|
||
def _do_send():
|
||
self.producer.send(self.STATE_TOPIC, key=self.STATE_KEY, value=value)
|
||
|
||
_with_retry(_do_send, max_retries=3, base_delay=0.5)
|
||
|
||
def flush(self) -> None:
|
||
"""Сбрасывает буфер с retry."""
|
||
def _do_flush():
|
||
self.producer.flush()
|
||
|
||
_with_retry(_do_flush, max_retries=3, base_delay=0.5)
|
||
|
||
def close(self) -> None:
|
||
"""Закрывает соединение."""
|
||
try:
|
||
self.producer.close()
|
||
except Exception as e:
|
||
logger.debug(f"Error closing producer (ignored): {e}")
|
||
|
||
def load(self) -> GeneratorState | None:
|
||
"""Загружает последнее состояние из топика.
|
||
|
||
Для compact topic хранится только последнее значение для ключа,
|
||
поэтому читаем все сообщения и берём последнее с нужным ключом.
|
||
Использует retry при сбоях подключения к Kafka.
|
||
"""
|
||
from kafka import KafkaConsumer
|
||
|
||
logger.info(f"Loading state from topic {self.STATE_TOPIC}")
|
||
|
||
def _do_load():
|
||
consumer = KafkaConsumer(
|
||
self.STATE_TOPIC,
|
||
bootstrap_servers=self.bootstrap_servers,
|
||
auto_offset_reset="earliest",
|
||
enable_auto_commit=False,
|
||
consumer_timeout_ms=5000,
|
||
value_deserializer=lambda v: json.loads(v.decode("utf-8")),
|
||
)
|
||
|
||
last_state = None
|
||
for message in consumer:
|
||
if message.key and message.key.decode("utf-8") == self.STATE_KEY:
|
||
last_state = message.value
|
||
|
||
consumer.close()
|
||
return last_state
|
||
|
||
try:
|
||
last_state = _with_retry(_do_load, max_retries=3, base_delay=0.5)
|
||
|
||
if last_state:
|
||
logger.info(f"Restored state: tick={last_state.get('tick')}, "
|
||
f"last_batch_id={last_state.get('last_batch_id')}")
|
||
# Используем from_dict_safe для graceful degradation при битом state
|
||
restored = GeneratorState.from_dict_safe(last_state)
|
||
if restored is None:
|
||
logger.warning("State data was invalid, starting fresh")
|
||
return restored
|
||
else:
|
||
logger.info("No previous state found, starting fresh")
|
||
return None
|
||
|
||
except Exception as e:
|
||
logger.warning(f"Failed to load state: {e}, starting fresh")
|
||
return None
|
||
|
||
|
||
# ---------------------------------------------------------------------------
|
||
# Утилиты для работы с Kafka с retry/backoff
|
||
# ---------------------------------------------------------------------------
|
||
def _with_retry(operation, max_retries: int = 5, base_delay: float = 1.0, max_delay: float = 30.0):
|
||
"""Выполняет операцию с экспоненциальным backoff и ограниченным числом попыток.
|
||
|
||
Args:
|
||
operation: функция для выполнения
|
||
max_retries: максимальное число попыток
|
||
base_delay: начальная задержка между попытками (сек)
|
||
max_delay: максимальная задержка между попытками (сек)
|
||
|
||
Returns:
|
||
результат операции
|
||
|
||
Raises:
|
||
последнее исключение после исчерпания попыток
|
||
"""
|
||
import time
|
||
|
||
last_exception = None
|
||
for attempt in range(max_retries):
|
||
try:
|
||
return operation()
|
||
except Exception as e:
|
||
last_exception = e
|
||
if attempt < max_retries - 1:
|
||
delay = min(base_delay * (2 ** attempt), max_delay)
|
||
logger.warning(f"Operation failed (attempt {attempt + 1}/{max_retries}): {e}. Retrying in {delay:.1f}s...")
|
||
time.sleep(delay)
|
||
else:
|
||
logger.error(f"Operation failed after {max_retries} attempts: {e}")
|
||
raise last_exception
|
||
|
||
|
||
# ---------------------------------------------------------------------------
|
||
# Создание топиков для истории и состояния
|
||
# ---------------------------------------------------------------------------
|
||
def ensure_topics(bootstrap_servers: str) -> None:
|
||
"""Создаёт необходимые топики если они не существуют (с retry на подключение)."""
|
||
from kafka import KafkaAdminClient
|
||
from kafka.admin import NewTopic
|
||
from kafka.errors import TopicAlreadyExistsError
|
||
|
||
def _create_topics():
|
||
admin_client = KafkaAdminClient(bootstrap_servers=bootstrap_servers)
|
||
try:
|
||
# Топик для истории батчей (обычный, с retention)
|
||
history_topic = NewTopic(
|
||
name=KafkaBatchHistory.HISTORY_TOPIC,
|
||
num_partitions=1,
|
||
replication_factor=1,
|
||
)
|
||
|
||
# Топик для состояния (compact - храним только последнее значение)
|
||
state_topic = NewTopic(
|
||
name=KafkaStateManager.STATE_TOPIC,
|
||
num_partitions=1,
|
||
replication_factor=1,
|
||
topic_configs={
|
||
"cleanup.policy": "compact",
|
||
"min.cleanable.dirty.ratio": "0.1",
|
||
"delete.retention.ms": "100",
|
||
},
|
||
)
|
||
|
||
for topic in [history_topic, state_topic]:
|
||
try:
|
||
admin_client.create_topics([topic])
|
||
logger.info(f"Created topic: {topic.name}")
|
||
except TopicAlreadyExistsError:
|
||
logger.debug(f"Topic already exists: {topic.name}")
|
||
finally:
|
||
admin_client.close()
|
||
|
||
_with_retry(_create_topics, max_retries=5, base_delay=1.0)
|
||
|
||
|
||
# ---------------------------------------------------------------------------
|
||
# Kafka history - пишет историю в отдельный топик
|
||
# ---------------------------------------------------------------------------
|
||
class KafkaBatchHistory:
|
||
"""Хранение истории batch в Kafka (отдельный топик) с retry."""
|
||
|
||
HISTORY_TOPIC = "generator_batch_history"
|
||
|
||
def __init__(self, bootstrap_servers: str):
|
||
self.bootstrap_servers = bootstrap_servers
|
||
self.producer = None
|
||
self._connect()
|
||
|
||
def _connect(self):
|
||
"""Устанавливает соединение с Kafka с retry."""
|
||
KafkaProducerCls, KafkaErrorCls = _import_kafka()
|
||
|
||
def _do_connect():
|
||
logger.info(f"Connecting to Kafka for history at {self.bootstrap_servers}")
|
||
self.producer = KafkaProducerCls(
|
||
bootstrap_servers=self.bootstrap_servers,
|
||
value_serializer=lambda v: json.dumps(v).encode("utf-8"),
|
||
key_serializer=lambda k: k.encode("utf-8") if k else None,
|
||
retries=3,
|
||
retry_backoff_ms=1000,
|
||
)
|
||
logger.info("Connected to Kafka for history successfully")
|
||
|
||
_with_retry(_do_connect, max_retries=5, base_delay=1.0)
|
||
|
||
def add(self, record: BatchRecord):
|
||
"""Добавляет запись в историю (топик Kafka) с retry и реконнектом."""
|
||
key = record.batch_id
|
||
value = record.to_dict()
|
||
|
||
def _do_send():
|
||
self.producer.send(self.HISTORY_TOPIC, key=key, value=value)
|
||
|
||
try:
|
||
_with_retry(_do_send, max_retries=3, base_delay=0.5)
|
||
except Exception as e:
|
||
logger.warning(f"Failed to send history record after retries: {e}, attempting reconnect")
|
||
self._connect()
|
||
# Повторная попытка после реконнекта
|
||
_with_retry(_do_send, max_retries=2, base_delay=0.5)
|
||
|
||
def flush(self):
|
||
"""Сбрасывает буфер с retry."""
|
||
def _do_flush():
|
||
self.producer.flush()
|
||
|
||
_with_retry(_do_flush, max_retries=3, base_delay=0.5)
|
||
|
||
def close(self):
|
||
"""Закрывает соединение."""
|
||
try:
|
||
if self.producer:
|
||
self.producer.close()
|
||
except Exception as e:
|
||
logger.debug(f"Error closing history producer (ignored): {e}")
|
||
|
||
|
||
# ---------------------------------------------------------------------------
|
||
# Kafka publisher
|
||
# ---------------------------------------------------------------------------
|
||
class KafkaPublisher:
|
||
"""Публикация событий в Kafka с retry и реконнектом."""
|
||
|
||
def __init__(self, bootstrap_servers: str):
|
||
self.bootstrap_servers = bootstrap_servers
|
||
self.producer = None
|
||
self._connect()
|
||
|
||
def _connect(self):
|
||
"""Устанавливает соединение с Kafka с retry."""
|
||
KafkaProducerCls, KafkaErrorCls = _import_kafka()
|
||
|
||
def _do_connect():
|
||
logger.info(f"Connecting to Kafka at {self.bootstrap_servers}")
|
||
self.producer = KafkaProducerCls(
|
||
bootstrap_servers=self.bootstrap_servers,
|
||
value_serializer=lambda v: json.dumps(v).encode("utf-8"),
|
||
key_serializer=lambda k: k.encode("utf-8") if k else None,
|
||
batch_size=16384,
|
||
linger_ms=100,
|
||
retries=3,
|
||
retry_backoff_ms=1000,
|
||
)
|
||
logger.info("Connected to Kafka successfully")
|
||
|
||
_with_retry(_do_connect, max_retries=5, base_delay=1.0)
|
||
|
||
def _publish_with_retry(self, topic: str, events: list[dict]) -> tuple[int, int]:
|
||
"""Внутренняя функция публикации с retry на уровне batch."""
|
||
if not self.producer:
|
||
raise RuntimeError("Producer not connected")
|
||
|
||
sent = 0
|
||
errors = 0
|
||
futures = []
|
||
|
||
for event in events:
|
||
key = event.get("event_id") or event.get("click_id")
|
||
try:
|
||
future = self.producer.send(topic, key=key, value=event)
|
||
futures.append(future)
|
||
except Exception as e:
|
||
logger.error(f"Failed to send message to {topic}: {e}")
|
||
errors += 1
|
||
METRICS_ERRORS_TOTAL.labels(topic=topic).inc()
|
||
|
||
# Ждём подтверждений
|
||
for future in futures:
|
||
try:
|
||
future.get(timeout=10)
|
||
sent += 1
|
||
METRICS_EVENTS_TOTAL.labels(topic=topic).inc()
|
||
except Exception as e:
|
||
logger.error(f"Failed to confirm message delivery: {e}")
|
||
errors += 1
|
||
METRICS_ERRORS_TOTAL.labels(topic=topic).inc()
|
||
|
||
return sent, errors
|
||
|
||
def publish(self, topic: str, events: list[dict]) -> tuple[int, int]:
|
||
"""
|
||
Публикует события в топик с retry и автоматическим реконнектом.
|
||
|
||
Returns:
|
||
(sent_count, error_count)
|
||
"""
|
||
def _do_publish():
|
||
return self._publish_with_retry(topic, events)
|
||
|
||
try:
|
||
return _with_retry(_do_publish, max_retries=3, base_delay=0.5)
|
||
except Exception as e:
|
||
logger.warning(f"Publish failed after retries: {e}, attempting reconnect")
|
||
self._connect()
|
||
# Повторная попытка после реконнекта
|
||
return _with_retry(_do_publish, max_retries=2, base_delay=0.5)
|
||
|
||
def flush(self):
|
||
"""Сбрасывает буфер с retry."""
|
||
def _do_flush():
|
||
if self.producer:
|
||
self.producer.flush()
|
||
|
||
_with_retry(_do_flush, max_retries=3, base_delay=0.5)
|
||
|
||
def close(self):
|
||
"""Закрывает соединение."""
|
||
try:
|
||
if self.producer:
|
||
self.producer.close()
|
||
except Exception as e:
|
||
logger.debug(f"Error closing producer (ignored): {e}")
|
||
|
||
|
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# ---------------------------------------------------------------------------
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# Основной цикл генератора
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# ---------------------------------------------------------------------------
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class GeneratorService:
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"""Основной сервис генератора."""
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def __init__(self, config: Config):
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self.config = config
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self.dictionary = EventDictionary.load(config.data_dir)
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self.generator = EventGenerator(self.dictionary, config)
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self.publisher: KafkaPublisher | None = None
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self.history: KafkaBatchHistory | None = None
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self.state_manager: KafkaStateManager | None = None
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self._running = False
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self._tick = 0 # Текущий номер тика (восстанавливается из стейта)
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def start(self):
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"""Запускает основной цикл."""
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if not self.config.enabled:
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logger.warning("Generator is disabled (GEN_ENABLED=false)")
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return
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# Запускаем HTTP-сервер для Prometheus метрик
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logger.info(f"Starting metrics server on port {self.config.metrics_port}")
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start_http_server(self.config.metrics_port)
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logger.info("Starting generator service...")
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logger.info(f"Configuration: tick={self.config.tick_seconds}s, "
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f"lambda_base={self.config.lambda_base_per_min}/min, "
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f"jitter={self.config.jitter_pct}%, "
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f"state_enabled={self.config.state_enabled}, "
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f"state_reset={self.config.state_reset}")
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# Подключаемся к Kafka для публикации событий и истории
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# Сначала создаём топики если нужно
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ensure_topics(self.config.kafka_bootstrap_servers)
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self.publisher = KafkaPublisher(self.config.kafka_bootstrap_servers)
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self.history = KafkaBatchHistory(self.config.kafka_bootstrap_servers)
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# Инициализируем state manager если включено
|
||
if self.config.state_enabled:
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self.state_manager = KafkaStateManager(self.config.kafka_bootstrap_servers)
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|
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# Восстанавливаем стейт если не требуется сброс
|
||
if not self.config.state_reset:
|
||
restored_state = self.state_manager.load()
|
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if restored_state:
|
||
self._tick = restored_state.tick
|
||
self.generator.rng.setstate(restored_state.rng_state)
|
||
logger.info(f"Restored state: continuing from tick {self._tick}, "
|
||
f"last_batch_id={restored_state.last_batch_id}")
|
||
else:
|
||
logger.info("State reset requested, starting fresh")
|
||
else:
|
||
logger.info("State management disabled")
|
||
|
||
self._running = True
|
||
|
||
try:
|
||
self._main_loop()
|
||
except KeyboardInterrupt:
|
||
logger.info("Received shutdown signal")
|
||
finally:
|
||
self.stop()
|
||
|
||
def stop(self):
|
||
"""Останавливает сервис."""
|
||
logger.info("Stopping generator service...")
|
||
self._running = False
|
||
if self.publisher:
|
||
self.publisher.close()
|
||
if self.history:
|
||
self.history.close()
|
||
if self.state_manager:
|
||
self.state_manager.close()
|
||
|
||
def _save_state(self, batch_id: str) -> None:
|
||
"""Сохраняет текущее состояние генератора."""
|
||
if not self.state_manager or not self.config.state_enabled:
|
||
return
|
||
|
||
try:
|
||
state = GeneratorState(
|
||
tick=self._tick,
|
||
rng_state=self.generator.rng.getstate(),
|
||
last_batch_id=batch_id,
|
||
last_timestamp=datetime.now(timezone.utc),
|
||
)
|
||
self.state_manager.save(state)
|
||
self.state_manager.flush()
|
||
logger.debug(f"Saved state: tick={self._tick}, batch_id={batch_id}")
|
||
except Exception as e:
|
||
logger.warning(f"Failed to save state: {e}")
|
||
METRICS_ERRORS_TOTAL.labels(topic="state").inc()
|
||
|
||
def _main_loop(self):
|
||
"""Основной цикл тиков."""
|
||
while self._running:
|
||
self._tick += 1
|
||
tick_start = time.time()
|
||
batch_id = str(uuid.uuid4())[:8]
|
||
|
||
with METRICS_TICK_DURATION.time():
|
||
logger.info(f"=== Tick {self._tick} (batch_id={batch_id}) ===")
|
||
|
||
try:
|
||
# Вычисляем количество событий
|
||
events_count = self.generator._calculate_events_count()
|
||
logger.info(f"Generating ~{events_count} base events")
|
||
|
||
# Генерируем тиковый батч из одного или нескольких визитов
|
||
gen_start = time.time()
|
||
batch = self.generator.generate_tick_batch(events_count)
|
||
gen_duration = time.time() - gen_start
|
||
|
||
# Публикуем в Kafka
|
||
pub_start = time.time()
|
||
total_sent = 0
|
||
total_errors = 0
|
||
|
||
sent_counts = {}
|
||
for topic, events in batch.items():
|
||
if events:
|
||
sent, errors = self.publisher.publish(topic, events)
|
||
sent_counts[topic] = {"sent": sent, "errors": errors}
|
||
total_sent += sent
|
||
total_errors += errors
|
||
|
||
# Определяем статус
|
||
if total_errors == 0:
|
||
status = "success"
|
||
elif total_sent > 0:
|
||
status = "partial"
|
||
else:
|
||
status = "error"
|
||
|
||
# Обновляем метрику последнего успешного тика и сохраняем стейт
|
||
if status in ("success", "partial"):
|
||
METRICS_LAST_SUCCESS.set_to_current_time()
|
||
self._save_state(batch_id)
|
||
|
||
# Флашим публикацию событий
|
||
self.publisher.flush()
|
||
pub_duration = time.time() - pub_start
|
||
|
||
# Сохраняем в историю (best-effort: ошибки не валят тик)
|
||
try:
|
||
batch_record = BatchRecord(
|
||
batch_id=batch_id,
|
||
started_at=datetime.fromtimestamp(tick_start, tz=timezone.utc),
|
||
finished_at=datetime.now(timezone.utc),
|
||
sent_total=total_sent,
|
||
sent_browser=sent_counts.get("browser_events", {}).get("sent", 0),
|
||
sent_location=sent_counts.get("location_events", {}).get("sent", 0),
|
||
sent_device=sent_counts.get("device_events", {}).get("sent", 0),
|
||
sent_geo=sent_counts.get("geo_events", {}).get("sent", 0),
|
||
status=status,
|
||
error_message=None if status == "success" else f"Errors: {total_errors}",
|
||
)
|
||
self.history.add(batch_record)
|
||
self.history.flush()
|
||
except Exception as hist_err:
|
||
logger.warning(f"Failed to write batch history: {hist_err}")
|
||
METRICS_ERRORS_TOTAL.labels(topic="history").inc()
|
||
|
||
# Логируем результат
|
||
tick_duration = time.time() - tick_start
|
||
logger.info(
|
||
f"Batch {batch_id} completed: "
|
||
f"sent={total_sent}, errors={total_errors}, "
|
||
f"gen_time={gen_duration:.3f}s, pub_time={pub_duration:.3f}s, "
|
||
f"total_time={tick_duration:.3f}s"
|
||
)
|
||
|
||
for topic, counts in sent_counts.items():
|
||
if counts["sent"] > 0:
|
||
logger.info(f" {topic}: {counts['sent']} sent")
|
||
|
||
except Exception as e:
|
||
logger.exception(f"Error in tick {self._tick}: {e}")
|
||
# Пытаемся записать ошибку в историю (best-effort)
|
||
try:
|
||
self.history.add(
|
||
BatchRecord(
|
||
batch_id=batch_id,
|
||
started_at=datetime.fromtimestamp(tick_start, tz=timezone.utc),
|
||
finished_at=datetime.now(timezone.utc),
|
||
sent_total=0,
|
||
sent_browser=0,
|
||
sent_location=0,
|
||
sent_device=0,
|
||
sent_geo=0,
|
||
status="error",
|
||
error_message=str(e),
|
||
)
|
||
)
|
||
self.history.flush()
|
||
except Exception as hist_err:
|
||
logger.warning(f"Failed to write error to history: {hist_err}")
|
||
|
||
# Ждём до следующего тика
|
||
elapsed = time.time() - tick_start
|
||
sleep_time = max(0, self.config.tick_seconds - elapsed)
|
||
if sleep_time > 0:
|
||
logger.debug(f"Sleeping for {sleep_time:.1f}s until next tick")
|
||
time.sleep(sleep_time)
|
||
|
||
|
||
# ---------------------------------------------------------------------------
|
||
# Точка входа
|
||
# ---------------------------------------------------------------------------
|
||
def main():
|
||
try:
|
||
config = Config()
|
||
service = GeneratorService(config)
|
||
service.start()
|
||
except Exception as e:
|
||
logger.exception(f"Fatal error: {e}")
|
||
sys.exit(1)
|
||
|
||
|
||
if __name__ == "__main__":
|
||
main()
|