refactor: 复用持久设备工作线程 (#110)

client/src/pdd_u2_purchase_adapter.py

@@ -18,6 +18,7 @@ from .pdd_device_service import (
     PDD_PACKAGE_NAME,
     PddDeviceError,
     PddDeviceService,
+    current_thread_device_service,
 )
 from .performance_timing import current_performance_trace
 from .pdd_purchase_adapter import (
@@ -561,9 +562,6 @@ class U2PddPurchaseAdapter(PddPurchaseAdapter):
         ) from error
 
 
-_PURCHASE_DEVICE_SERVICE = PddDeviceService()
-
-
 def create_u2_purchase_adapter(
     device_address: str, cancelled: Callable[[], bool]
 ) -> PddPurchaseAdapter:
@@ -571,7 +569,7 @@ def create_u2_purchase_adapter(
 
     return U2PddPurchaseAdapter(
         device_address,
-        device_service=_PURCHASE_DEVICE_SERVICE,
+        device_service=current_thread_device_service() or PddDeviceService(),
         cancelled=cancelled,
     )
 
@@ -625,6 +623,6 @@ def create_u2_live_purchase_adapter(
 
     return U2PddLivePurchaseAdapter(
         device_address,
-        device_service=_PURCHASE_DEVICE_SERVICE,
+        device_service=current_thread_device_service() or PddDeviceService(),
         cancelled=cancelled,
     )