To enable cleanup, use as a context manager

src/documents/consumer.py

@@ -426,8 +426,8 @@ class ConsumerPlugin(
                     ProgressStatusOptions.WORKING,
                     ConsumerStatusShortMessage.PARSE_DATE,
                 )
-                date_parser = get_date_parser()
+                with get_date_parser() as date_parser:
-                date = next(date_parser.parse(self.filename, text), None)
+                    date = next(date_parser.parse(self.filename, text), None)
             archive_path = document_parser.get_archive_path()
             page_count = document_parser.get_page_count(self.working_copy, mime_type)
 

src/documents/plugins/date_parsing/base.py

@@ -4,6 +4,12 @@ from abc import ABC
 from abc import abstractmethod
 from collections.abc import Iterator
 from dataclasses import dataclass
+from types import TracebackType
+
+try:
+    from typing import Self
+except ImportError:
+    from typing_extensions import Self
 
 import dateparser
 
@@ -28,6 +34,7 @@ class DateParserConfig:
     reference_time: datetime.datetime
 
     # Settings for the default RegexDateParser
+    # Other plugins should use or consider these, but it is not required
     filename_date_order: str | None
     content_date_order: str
 
@@ -45,6 +52,28 @@ class DateParserPluginBase(ABC):
         """
         self.config = config
 
+    def __enter__(self) -> Self:
+        """
+        Enter the runtime context related to this object.
+
+        Subclasses can override this to acquire resources (connections, handles).
+        """
+        return self
+
+    def __exit__(
+        self,
+        exc_type: type[BaseException] | None,
+        exc_val: BaseException | None,
+        exc_tb: TracebackType | None,
+    ) -> None:
+        """
+        Exit the runtime context related to this object.
+
+        Subclasses can override this to release resources.
+        """
+        # Default implementation does nothing.
+        # Returning None implies exceptions are propagated.
+
     def _parse_string(
         self,
         date_string: str,

src/documents/views.py

@@ -1023,17 +1023,17 @@ class DocumentViewSet(
 
             dates = []
             if settings.NUMBER_OF_SUGGESTED_DATES > 0:
-                date_parser = get_date_parser()
+                with get_date_parser() as date_parser:
-                gen = date_parser.parse(doc.filename, doc.content)
+                    gen = date_parser.parse(doc.filename, doc.content)
-                dates = sorted(
+                    dates = sorted(
-                    {
+                        {
-                        i
+                            i
-                        for i in itertools.islice(
+                            for i in itertools.islice(
-                            gen,
+                                gen,
-                            settings.NUMBER_OF_SUGGESTED_DATES,
+                                settings.NUMBER_OF_SUGGESTED_DATES,
-                        )
+                            )
-                    },
+                        },
-                )
+                    )
 
             resp_data = {
                 "correspondents": [