mi
253 lines
9.8 KiB
Python
253 lines
9.8 KiB
Python
from __future__ import annotations
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import asyncio
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import logging
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import random
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import signal
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import time
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from datetime import UTC, datetime, timedelta
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import httpx
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import structlog
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from opentelemetry import trace
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from prometheus_client import start_http_server
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from sqlalchemy import and_, func, or_, select, update
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from app.db import Database, SendStatus, SmsOutboundMessage
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from app.logging_security import redact_event
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from app.metrics import (
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JOURNAL_ROWS,
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PENDING_AGE,
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PROVIDER_LATENCY,
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SEND_TOTAL,
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SETTINGS_VALID,
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UNCERTAIN_TOTAL,
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)
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from app.provider import IdgtlClient, IdgtlConfig
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from app.service import RuntimeSettings, load_runtime_settings
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from app.settings import Settings, get_settings
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from app.telemetry import add_trace_context, init_telemetry
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log = structlog.get_logger()
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MAX_CONNECT_ATTEMPTS = 3
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def configure_logging(level: str) -> None:
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logging.basicConfig(level=level, format="%(message)s")
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structlog.configure(
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processors=[
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structlog.contextvars.merge_contextvars,
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add_trace_context,
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redact_event,
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structlog.processors.TimeStamper(fmt="iso", utc=True, key="timestamp"),
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structlog.stdlib.add_log_level,
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structlog.processors.JSONRenderer(),
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]
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)
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async def reconcile_expired_leases(db: Database) -> int:
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now = datetime.now(UTC)
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async with db.sessions.begin() as session:
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result = await session.execute(
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update(SmsOutboundMessage)
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.where(
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SmsOutboundMessage.send_status == SendStatus.PENDING,
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SmsOutboundMessage.attempt_count > 0,
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SmsOutboundMessage.worker_locked_until < now,
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)
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.values(
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send_status=SendStatus.UNCERTAIN,
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worker_locked_until=None,
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next_attempt_at=None,
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updated_at=now,
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provider_error_code="worker_lease_expired",
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provider_error_message="provider_result_uncertain",
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)
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.returning(SmsOutboundMessage.id)
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)
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ids = list(result.scalars())
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for message_id in ids:
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SEND_TOTAL.labels("idgtl", SendStatus.UNCERTAIN.value).inc()
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UNCERTAIN_TOTAL.labels("idgtl").inc()
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log.error("worker.lease_expired", sms_message_id=str(message_id))
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return len(ids)
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async def lease_message(db: Database, runtime: RuntimeSettings) -> SmsOutboundMessage | None:
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now = datetime.now(UTC)
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eligible = or_(
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and_(
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SmsOutboundMessage.send_status == SendStatus.PENDING,
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SmsOutboundMessage.attempt_count == 0,
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),
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and_(
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SmsOutboundMessage.send_status == SendStatus.FAILED,
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SmsOutboundMessage.attempt_count < MAX_CONNECT_ATTEMPTS,
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),
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)
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async with db.sessions.begin() as session:
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message = await session.scalar(
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select(SmsOutboundMessage)
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.where(
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eligible,
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SmsOutboundMessage.next_attempt_at <= now,
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or_(
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SmsOutboundMessage.worker_locked_until.is_(None),
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SmsOutboundMessage.worker_locked_until < now,
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),
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)
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.order_by(SmsOutboundMessage.next_attempt_at, SmsOutboundMessage.created_at)
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.with_for_update(skip_locked=True)
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.limit(1)
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)
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if message:
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message.send_status = SendStatus.PENDING
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message.attempt_count += 1
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message.last_attempt_at = now
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message.worker_locked_until = now + timedelta(seconds=runtime.lease_seconds)
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message.updated_at = now
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return message
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async def save_result(db: Database, message_id, result, attempt_count: int) -> None:
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now = datetime.now(UTC)
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status = result.send_status
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next_attempt = None
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if result.retry_safe and attempt_count < MAX_CONNECT_ATTEMPTS:
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next_attempt = now + timedelta(seconds=(2**attempt_count) + random.uniform(0, 1)) # noqa: S311
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async with db.sessions.begin() as session:
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values = {
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"send_status": status,
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"provider_http_status": result.http_status,
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"provider_message_id": result.message_uuid,
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"provider_external_id": result.external_id,
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"provider_error_code": result.error_code,
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"provider_error_message": result.error_message,
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"worker_locked_until": None,
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"next_attempt_at": next_attempt,
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"updated_at": now,
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}
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if status == SendStatus.ACCEPTED:
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values["accepted_at"] = now
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await session.execute(
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update(SmsOutboundMessage)
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.where(
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SmsOutboundMessage.id == message_id,
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SmsOutboundMessage.send_status == SendStatus.PENDING,
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SmsOutboundMessage.attempt_count == attempt_count,
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)
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.values(**values)
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)
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SEND_TOTAL.labels("idgtl", status.value).inc()
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if status == SendStatus.UNCERTAIN:
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UNCERTAIN_TOTAL.labels("idgtl").inc()
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if result.contract_violation:
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log.error("provider.contract_violation", sms_message_id=str(message_id))
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def provider_config(settings: Settings, runtime: RuntimeSettings) -> IdgtlConfig:
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if settings.idgtl_api_key is None:
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raise RuntimeError("IDGTL_SMS_API_KEY is required by sms-worker")
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return IdgtlConfig(
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base_url=str(settings.idgtl_base_url),
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api_key=settings.idgtl_api_key.get_secret_value(),
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callback_url=str(settings.callback_public_url),
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callback_username=settings.callback_username.get_secret_value(),
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callback_password=settings.callback_password.get_secret_value(),
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connect_timeout_ms=runtime.connect_timeout_ms,
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request_timeout_ms=runtime.request_timeout_ms,
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callback_enabled=runtime.callback_enabled,
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)
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async def update_queue_metrics(db: Database) -> None:
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async with db.sessions() as session:
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oldest = await session.scalar(
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select(func.min(SmsOutboundMessage.created_at)).where(
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SmsOutboundMessage.send_status == SendStatus.PENDING
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)
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)
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count = await session.scalar(select(func.count(SmsOutboundMessage.id)))
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age = max(0.0, (datetime.now(UTC) - oldest).total_seconds()) if oldest else 0.0
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PENDING_AGE.set(age)
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JOURNAL_ROWS.set(count or 0)
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async def worker_loop(stop: asyncio.Event) -> None:
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settings = get_settings()
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telemetry = init_telemetry("sms-worker")
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configure_logging(settings.log_level)
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structlog.contextvars.bind_contextvars(**{"service.name": "sms-worker"})
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metrics_server, metrics_thread = start_http_server(
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settings.metrics_port,
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addr="0.0.0.0", # noqa: S104 - internal Docker-network listener
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)
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tracer = trace.get_tracer("han.sms.worker")
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db = Database(settings.database_url)
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async with httpx.AsyncClient() as http:
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try:
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while not stop.is_set():
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try:
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await reconcile_expired_leases(db)
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async with db.sessions() as session:
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runtime = await load_runtime_settings(session)
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SETTINGS_VALID.set(1)
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claim_started_ns = time.time_ns()
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message = await lease_message(db, runtime)
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claim_finished_ns = time.time_ns()
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if message is None:
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await update_queue_metrics(db)
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await asyncio.wait_for(stop.wait(), timeout=runtime.poll_interval_ms / 1000)
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continue
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process_span = tracer.start_span("sms.process", start_time=claim_started_ns)
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with trace.use_span(process_span, end_on_exit=True):
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claim_span = tracer.start_span("sms.claim", start_time=claim_started_ns)
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claim_span.set_attribute("sms.claimed", True)
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claim_span.end(end_time=claim_finished_ns)
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span = trace.get_current_span()
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span.set_attribute("messaging.operation.name", "send")
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span.set_attribute("messaging.system", "idgtl")
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span.set_attribute("sms.attempt", message.attempt_count)
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client = IdgtlClient(http, provider_config(settings, runtime))
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with tracer.start_as_current_span("sms.provider"):
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started = time.monotonic()
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result = await client.send(message)
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PROVIDER_LATENCY.labels("idgtl").observe(time.monotonic() - started)
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span.set_attribute("sms.outcome", result.send_status.value)
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with tracer.start_as_current_span("sms.save_result"):
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await save_result(db, message.id, result, message.attempt_count)
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except TimeoutError:
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continue
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except Exception as exc:
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SETTINGS_VALID.set(0)
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log.error(
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"worker.iteration_failed",
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error_type=type(exc).__name__,
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)
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try:
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await asyncio.wait_for(stop.wait(), timeout=5)
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except TimeoutError:
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pass
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finally:
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await db.close()
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metrics_server.shutdown()
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metrics_thread.join(timeout=5)
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if telemetry:
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telemetry.shutdown()
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def run() -> None:
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stop = asyncio.Event()
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loop = asyncio.new_event_loop()
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asyncio.set_event_loop(loop)
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for name in (signal.SIGINT, signal.SIGTERM):
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try:
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loop.add_signal_handler(name, stop.set)
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except NotImplementedError:
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pass
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try:
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loop.run_until_complete(worker_loop(stop))
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finally:
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loop.close()
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