feat(appliance): initial release of MERICA standalone appliance v1.0.0

backend/app/main.py

@@ -0,0 +1,82 @@
+"""
+DLH Data Lakehouse - Dynamic Pipeline & Storage API
+Modular Entrypoint with FastAPI
+"""
+import logging
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.core.config import settings
+from app.routers import api_v1_router, legacy_router
+from app.schemas.pipeline import DeployRequest, DraftRequest
+from app.schemas.connection import ConnectionTestRequest, CustomConnectionRequest
+from app.services.pipeline_parser import parse_yaml_to_pipeline_dict
+from app.services.metadb_service import save_connection_to_metadb
+from app.services.dbt_service import sync_dbt_models_from_nodes
+
+# Configure root logger
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s"
+)
+logger = logging.getLogger(__name__)
+
+# Module-level variable exports for backward compatibility with existing scripts
+CONFIGS_DIR = settings.CONFIGS_DIR
+UPLOADS_DIR = settings.UPLOADS_DIR
+DOCS_DIR = settings.DOCS_DIR
+DBT_DIR = settings.DBT_DIR
+
+# FastAPI Application Factory / Instance
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    version=settings.VERSION,
+    description="Modular FastAPI Backend for MERICA Studio, Dynamic Lakehouse YAML Generation, and Airflow 3 DAG Bundles."
+)
+
+# CORS Setup
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=settings.CORS_ORIGINS,
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Mount RESTful v1 Router and Canvas v0.1 Backward Compatibility Router
+app.include_router(api_v1_router)
+app.include_router(legacy_router)
+
+
+@app.get("/api/v1/health", tags=["System"], summary="System health check probe")
+def health_check():
+    """Health check probe endpoint."""
+    return {
+        "status": "ok",
+        "service": settings.PROJECT_NAME,
+        "version": settings.VERSION
+    }
+
+# Backward compatibility health check probes (hidden from OpenAPI schema)
+@app.get("/health", include_in_schema=False)
+@app.get("/api/health", include_in_schema=False)
+def legacy_health_check():
+    return health_check()
+
+
+# Exported symbols for python imports
+__all__ = [
+    "app",
+    "settings",
+    "CONFIGS_DIR",
+    "UPLOADS_DIR",
+    "DOCS_DIR",
+    "DBT_DIR",
+    "parse_yaml_to_pipeline_dict",
+    "save_connection_to_metadb",
+    "sync_dbt_models_from_nodes",
+    "DeployRequest",
+    "DraftRequest",
+    "ConnectionTestRequest",
+    "CustomConnectionRequest",
+]