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09fa60b a3c3ef2 09fa60b a3c3ef2 09fa60b a3c3ef2 09fa60b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 | """Generation endpoints."""
from typing import Any
from uuid import UUID
import structlog
from fastapi import APIRouter, Depends, HTTPException, BackgroundTasks, Query
from fastapi.responses import FileResponse
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select, func
from pathlib import Path
from app.db.database import get_db
from app.db.models import Generation
from app.schemas.generation import (
GenerationRequest,
GenerationResponse,
GenerationListResponse,
)
from app.services.orchestrator import get_orchestrator
from app.core.metrics import http_requests_total, http_request_duration
from app.core.config import settings
logger = structlog.get_logger(__name__)
router = APIRouter()
@router.post("/", response_model=GenerationResponse, status_code=202)
async def create_generation(
request: GenerationRequest,
background_tasks: BackgroundTasks,
db: AsyncSession = Depends(get_db),
) -> GenerationResponse:
"""
Create a new music generation request.
Returns immediately with generation ID, processing happens in background.
"""
with http_request_duration.labels(method="POST", endpoint="/generations").time():
try:
# Create generation record
generation = Generation(
prompt=request.prompt,
lyrics=request.lyrics,
style=request.style,
duration=request.duration or settings.MUSICGEN_DURATION,
status="pending",
)
db.add(generation)
await db.commit()
await db.refresh(generation)
# Start background processing
background_tasks.add_task(process_generation_task, generation.id, request)
http_requests_total.labels(
method="POST", endpoint="/generations", status="202"
).inc()
logger.info(
"generation_created",
generation_id=str(generation.id),
prompt=request.prompt[:100],
)
return GenerationResponse(
id=generation.id,
status="pending",
prompt=generation.prompt,
created_at=generation.created_at,
)
except Exception as e:
logger.error("failed_to_create_generation", exc_info=e)
http_requests_total.labels(
method="POST", endpoint="/generations", status="500"
).inc()
raise HTTPException(status_code=500, detail="Failed to create generation")
@router.get("/{generation_id}", response_model=GenerationResponse)
async def get_generation(
generation_id: UUID,
db: AsyncSession = Depends(get_db),
) -> GenerationResponse:
"""Get generation by ID."""
with http_request_duration.labels(
method="GET", endpoint="/generations/{id}"
).time():
result = await db.execute(
select(Generation).where(Generation.id == generation_id)
)
generation = result.scalar_one_or_none()
if not generation:
http_requests_total.labels(
method="GET", endpoint="/generations/{id}", status="404"
).inc()
raise HTTPException(status_code=404, detail="Generation not found")
http_requests_total.labels(
method="GET", endpoint="/generations/{id}", status="200"
).inc()
audio_url = None
if generation.audio_path and generation.status == "completed":
audio_url = f"/api/v1/generations/{generation.id}/audio"
logger.info("debug_get_generation", audio_url=audio_url, original_path=generation.audio_path)
return GenerationResponse(
id=generation.id,
status=generation.status,
prompt=generation.prompt,
audio_path=audio_url,
metadata=generation.generation_metadata,
processing_time_seconds=generation.processing_time_seconds,
error_message=generation.error_message,
created_at=generation.created_at,
completed_at=generation.completed_at,
)
@router.get("/{generation_id}/audio")
async def get_generation_audio(
generation_id: UUID,
db: AsyncSession = Depends(get_db),
) -> FileResponse:
"""Get generated audio file."""
result = await db.execute(
select(Generation).where(Generation.id == generation_id)
)
generation = result.scalar_one_or_none()
if not generation:
raise HTTPException(status_code=404, detail="Generation not found")
if not generation.audio_path:
raise HTTPException(
status_code=404, detail="Audio not yet generated"
)
audio_path = Path(generation.audio_path)
if not audio_path.exists():
raise HTTPException(status_code=404, detail="Audio file not found")
return FileResponse(
path=str(audio_path),
media_type="audio/wav",
filename=f"generation-{generation_id}.wav",
)
@router.get("/", response_model=GenerationListResponse)
async def list_generations(
page: int = Query(1, ge=1),
page_size: int = Query(20, ge=1, le=100),
db: AsyncSession = Depends(get_db),
) -> GenerationListResponse:
"""List generations with pagination."""
with http_request_duration.labels(method="GET", endpoint="/generations").time():
# Get total count
count_result = await db.execute(select(func.count(Generation.id)))
total = count_result.scalar_one()
# Get paginated results
offset = (page - 1) * page_size
result = await db.execute(
select(Generation)
.order_by(Generation.created_at.desc())
.offset(offset)
.limit(page_size)
)
generations = result.scalars().all()
http_requests_total.labels(
method="GET", endpoint="/generations", status="200"
).inc()
return GenerationListResponse(
items=[
GenerationResponse(
id=g.id,
status=g.status,
prompt=g.prompt,
audio_path=f"/api/v1/generations/{g.id}/audio" if g.audio_path and g.status == "completed" else None,
metadata=g.generation_metadata,
processing_time_seconds=g.processing_time_seconds,
error_message=g.error_message,
created_at=g.created_at,
completed_at=g.completed_at,
)
for g in generations
],
total=total,
page=page,
page_size=page_size,
)
async def process_generation_task(generation_id: UUID, request: GenerationRequest) -> None:
"""Background task to process generation."""
from app.db.database import AsyncSessionLocal
async with AsyncSessionLocal() as db:
try:
# Get generation record
result = await db.execute(
select(Generation).where(Generation.id == generation_id)
)
generation = result.scalar_one()
# Update status
generation.status = "processing"
await db.commit()
# Run orchestrator
orchestrator = get_orchestrator()
await orchestrator.generate(request, generation)
# Commit final state
await db.commit()
except Exception as e:
logger.error(
"background_generation_failed",
generation_id=str(generation_id),
exc_info=e,
)
# Update error status
try:
result = await db.execute(
select(Generation).where(Generation.id == generation_id)
)
generation = result.scalar_one()
generation.status = "failed"
generation.error_message = str(e)
await db.commit()
except Exception:
pass
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