feat(archive-cache): implement more usage stats for later easier evictions

rhodecode/lib/rc_cache/archive_cache/fanout_cache.py

@@ -78,10 +78,13 b' class FileSystemCache:'
         # STORE METADATA
         _metadata = {
             "version": "v1",
-            "timestamp": time.time(),
             "filename": filename,
             "full_path": full_path,
             "key_file": key_file,
+            "store_time": time.time(),
+            "access_count": 1,
+            "access_time": 0,
+            "size": 0
         }
         if metadata:
             _metadata.update(metadata)
@@ -90,6 +93,7 b' class FileSystemCache:'
 
         iterator = iter(reader, b'')
         size = self._write_file(full_path, iterator, 'xb')
+        metadata['size'] = size
 
         # after archive is finished, we create a key to save the presence of the binary file
         with open(key_file, 'wb') as f:
@@ -107,7 +111,15 b' class FileSystemCache:'
 
         filename = metadata['filename']
 
-        return open(os.path.join(self._directory, filename), 'rb'), metadata
+        try:
+            return open(os.path.join(self._directory, filename), 'rb'), metadata
+        finally:
+            # update usage stats, count and accessed
+            metadata["access_count"] = metadata.get("access_count", 0) + 1
+            metadata["access_time"] = time.time()
+
+            with open(key_file, 'wb') as f:
+                f.write(json.dumps(metadata))
 
     def random_filename(self):
         """Return filename and full-path tuple for file storage.
@@ -169,6 +181,9 b' class FanoutCache:'
         self._count = settings.pop('cache_shards')
         self._locking_url = settings.pop('locking_url')
 
+        self._eviction_policy = settings['cache_eviction_policy']
+        self._cache_size_limit = settings['cache_size_limit']
+
         self._shards = tuple(
             FileSystemCache(
                 index=num,
@@ -261,4 +276,3 b' def get_archival_cache_store(config):'
     )
     cache_meta = d_cache
     return cache_meta
-

rhodecode/lib/rc_cache/archive_cache/utils.py

@@ -15,6 +15,7 b''
 # This program is dual-licensed. If you wish to learn more about the
 # RhodeCode Enterprise Edition, including its added features, Support services,
 # and proprietary license terms, please see https://rhodecode.com/licenses/
+
 import os