256 lines
11 KiB
Python
256 lines
11 KiB
Python
"""
|
|
Task Management System for Blog Writer API
|
|
|
|
Handles background task execution, status tracking, and progress updates
|
|
for research and outline generation operations.
|
|
Now uses database-backed persistence for reliability and recovery.
|
|
"""
|
|
|
|
import asyncio
|
|
import uuid
|
|
from datetime import datetime
|
|
from typing import Any, Dict, List
|
|
from loguru import logger
|
|
|
|
from models.blog_models import (
|
|
BlogResearchRequest,
|
|
BlogOutlineRequest,
|
|
MediumBlogGenerateRequest,
|
|
MediumBlogGenerateResult,
|
|
)
|
|
from services.blog_writer.blog_service import BlogWriterService
|
|
from services.blog_writer.database_task_manager import DatabaseTaskManager
|
|
|
|
|
|
class TaskManager:
|
|
"""Manages background tasks for research and outline generation."""
|
|
|
|
def __init__(self, db_connection=None):
|
|
# Fallback to in-memory storage if no database connection
|
|
if db_connection:
|
|
self.db_manager = DatabaseTaskManager(db_connection)
|
|
self.use_database = True
|
|
else:
|
|
self.task_storage: Dict[str, Dict[str, Any]] = {}
|
|
self.service = BlogWriterService()
|
|
self.use_database = False
|
|
logger.warning("No database connection provided, using in-memory task storage")
|
|
|
|
def cleanup_old_tasks(self):
|
|
"""Remove tasks older than 1 hour to prevent memory leaks."""
|
|
current_time = datetime.now()
|
|
tasks_to_remove = []
|
|
|
|
for task_id, task_data in self.task_storage.items():
|
|
if (current_time - task_data["created_at"]).total_seconds() > 3600: # 1 hour
|
|
tasks_to_remove.append(task_id)
|
|
|
|
for task_id in tasks_to_remove:
|
|
del self.task_storage[task_id]
|
|
|
|
def create_task(self, task_type: str = "general") -> str:
|
|
"""Create a new task and return its ID."""
|
|
task_id = str(uuid.uuid4())
|
|
|
|
self.task_storage[task_id] = {
|
|
"status": "pending",
|
|
"created_at": datetime.now(),
|
|
"result": None,
|
|
"error": None,
|
|
"progress_messages": [],
|
|
"task_type": task_type
|
|
}
|
|
|
|
return task_id
|
|
|
|
async def get_task_status(self, task_id: str) -> Dict[str, Any]:
|
|
"""Get the status of a task."""
|
|
if self.use_database:
|
|
return await self.db_manager.get_task_status(task_id)
|
|
else:
|
|
self.cleanup_old_tasks()
|
|
|
|
if task_id not in self.task_storage:
|
|
return None
|
|
|
|
task = self.task_storage[task_id]
|
|
response = {
|
|
"task_id": task_id,
|
|
"status": task["status"],
|
|
"created_at": task["created_at"].isoformat(),
|
|
"progress_messages": task.get("progress_messages", [])
|
|
}
|
|
|
|
if task["status"] == "completed":
|
|
response["result"] = task["result"]
|
|
elif task["status"] == "failed":
|
|
response["error"] = task["error"]
|
|
|
|
return response
|
|
|
|
async def update_progress(self, task_id: str, message: str, percentage: float = None):
|
|
"""Update progress message for a task."""
|
|
if self.use_database:
|
|
await self.db_manager.update_progress(task_id, message, percentage)
|
|
else:
|
|
if task_id in self.task_storage:
|
|
if "progress_messages" not in self.task_storage[task_id]:
|
|
self.task_storage[task_id]["progress_messages"] = []
|
|
|
|
progress_entry = {
|
|
"timestamp": datetime.now().isoformat(),
|
|
"message": message
|
|
}
|
|
self.task_storage[task_id]["progress_messages"].append(progress_entry)
|
|
|
|
# Keep only last 10 progress messages to prevent memory bloat
|
|
if len(self.task_storage[task_id]["progress_messages"]) > 10:
|
|
self.task_storage[task_id]["progress_messages"] = self.task_storage[task_id]["progress_messages"][-10:]
|
|
|
|
logger.info(f"Progress update for task {task_id}: {message}")
|
|
|
|
async def start_research_task(self, request: BlogResearchRequest, user_id: str = "anonymous") -> str:
|
|
"""Start a research operation and return a task ID."""
|
|
if self.use_database:
|
|
return await self.db_manager.start_research_task(request, user_id)
|
|
else:
|
|
task_id = self.create_task("research")
|
|
# Start the research operation in the background
|
|
asyncio.create_task(self._run_research_task(task_id, request))
|
|
return task_id
|
|
|
|
def start_outline_task(self, request: BlogOutlineRequest) -> str:
|
|
"""Start an outline generation operation and return a task ID."""
|
|
task_id = self.create_task("outline")
|
|
|
|
# Start the outline generation operation in the background
|
|
asyncio.create_task(self._run_outline_generation_task(task_id, request))
|
|
|
|
return task_id
|
|
|
|
def start_medium_generation_task(self, request: MediumBlogGenerateRequest) -> str:
|
|
"""Start a medium (≤1000 words) full-blog generation task."""
|
|
task_id = self.create_task("medium_generation")
|
|
asyncio.create_task(self._run_medium_generation_task(task_id, request))
|
|
return task_id
|
|
|
|
def start_content_generation_task(self, request: MediumBlogGenerateRequest) -> str:
|
|
"""Start content generation (full blog via sections) with provider parity.
|
|
|
|
Internally reuses medium generator pipeline for now but tracked under
|
|
distinct task_type 'content_generation' and same polling contract.
|
|
"""
|
|
task_id = self.create_task("content_generation")
|
|
asyncio.create_task(self._run_medium_generation_task(task_id, request))
|
|
return task_id
|
|
|
|
async def _run_research_task(self, task_id: str, request: BlogResearchRequest):
|
|
"""Background task to run research and update status with progress messages."""
|
|
try:
|
|
# Update status to running
|
|
self.task_storage[task_id]["status"] = "running"
|
|
self.task_storage[task_id]["progress_messages"] = []
|
|
|
|
# Send initial progress message
|
|
await self.update_progress(task_id, "🔍 Starting research operation...")
|
|
|
|
# Check cache first
|
|
await self.update_progress(task_id, "📋 Checking cache for existing research...")
|
|
|
|
# Run the actual research with progress updates
|
|
result = await self.service.research_with_progress(request, task_id)
|
|
|
|
# Check if research failed gracefully
|
|
if not result.success:
|
|
await self.update_progress(task_id, f"❌ Research failed: {result.error_message or 'Unknown error'}")
|
|
self.task_storage[task_id]["status"] = "failed"
|
|
self.task_storage[task_id]["error"] = result.error_message or "Research failed"
|
|
else:
|
|
await self.update_progress(task_id, f"✅ Research completed successfully! Found {len(result.sources)} sources and {len(result.search_queries or [])} search queries.")
|
|
# Update status to completed
|
|
self.task_storage[task_id]["status"] = "completed"
|
|
self.task_storage[task_id]["result"] = result.dict()
|
|
|
|
except Exception as e:
|
|
await self.update_progress(task_id, f"❌ Research failed with error: {str(e)}")
|
|
# Update status to failed
|
|
self.task_storage[task_id]["status"] = "failed"
|
|
self.task_storage[task_id]["error"] = str(e)
|
|
|
|
# Ensure we always send a final completion message
|
|
finally:
|
|
if task_id in self.task_storage:
|
|
current_status = self.task_storage[task_id]["status"]
|
|
if current_status not in ["completed", "failed"]:
|
|
# Force completion if somehow we didn't set a final status
|
|
await self.update_progress(task_id, "⚠️ Research operation completed with unknown status")
|
|
self.task_storage[task_id]["status"] = "failed"
|
|
self.task_storage[task_id]["error"] = "Research completed with unknown status"
|
|
|
|
async def _run_outline_generation_task(self, task_id: str, request: BlogOutlineRequest):
|
|
"""Background task to run outline generation and update status with progress messages."""
|
|
try:
|
|
# Update status to running
|
|
self.task_storage[task_id]["status"] = "running"
|
|
self.task_storage[task_id]["progress_messages"] = []
|
|
|
|
# Send initial progress message
|
|
await self.update_progress(task_id, "🧩 Starting outline generation...")
|
|
|
|
# Run the actual outline generation with progress updates
|
|
result = await self.service.generate_outline_with_progress(request, task_id)
|
|
|
|
# Update status to completed
|
|
await self.update_progress(task_id, f"✅ Outline generated successfully! Created {len(result.outline)} sections with {len(result.title_options)} title options.")
|
|
self.task_storage[task_id]["status"] = "completed"
|
|
self.task_storage[task_id]["result"] = result.dict()
|
|
|
|
except Exception as e:
|
|
await self.update_progress(task_id, f"❌ Outline generation failed: {str(e)}")
|
|
# Update status to failed
|
|
self.task_storage[task_id]["status"] = "failed"
|
|
self.task_storage[task_id]["error"] = str(e)
|
|
|
|
async def _run_medium_generation_task(self, task_id: str, request: MediumBlogGenerateRequest):
|
|
"""Background task to generate a medium blog using a single structured JSON call."""
|
|
try:
|
|
self.task_storage[task_id]["status"] = "running"
|
|
self.task_storage[task_id]["progress_messages"] = []
|
|
|
|
await self.update_progress(task_id, "📦 Packaging outline and metadata...")
|
|
|
|
# Basic guard: respect global target words
|
|
total_target = int(request.globalTargetWords or 1000)
|
|
if total_target > 1000:
|
|
raise ValueError("Global target words exceed 1000; medium generation not allowed")
|
|
|
|
result: MediumBlogGenerateResult = await self.service.generate_medium_blog_with_progress(
|
|
request,
|
|
task_id,
|
|
)
|
|
|
|
if not result or not getattr(result, "sections", None):
|
|
raise ValueError("Empty generation result from model")
|
|
|
|
# Check if result came from cache
|
|
cache_hit = getattr(result, 'cache_hit', False)
|
|
if cache_hit:
|
|
await self.update_progress(task_id, "⚡ Found cached content - loading instantly!")
|
|
else:
|
|
await self.update_progress(task_id, "🤖 Generated fresh content with AI...")
|
|
await self.update_progress(task_id, "✨ Post-processing and assembling sections...")
|
|
|
|
# Mark completed
|
|
self.task_storage[task_id]["status"] = "completed"
|
|
self.task_storage[task_id]["result"] = result.dict()
|
|
await self.update_progress(task_id, f"✅ Generated {len(result.sections)} sections successfully.")
|
|
|
|
except Exception as e:
|
|
await self.update_progress(task_id, f"❌ Medium generation failed: {str(e)}")
|
|
self.task_storage[task_id]["status"] = "failed"
|
|
self.task_storage[task_id]["error"] = str(e)
|
|
|
|
|
|
# Global task manager instance
|
|
task_manager = TaskManager()
|