Added ReadAfterWrite

app/cache/read_after_write_cache.py

@@ -0,0 +1,20 @@
+from .cache import BaselineCache
+from database import get_user_profile
+
+class ReadAfterWriteCache(BaselineCache):
+    
+    def __init__(self, limit):
+        super().__init__( limit )
+
+    def invalidate(self, key: str) -> bool:
+        # basic delete invalidation, but after writing, we immediately read the value and add it to the cache
+        invalidated = False
+        if key in self.cache:
+            del self.cache[key]
+            invalidated = True
+        
+        newData = get_user_profile( key )
+        self.put( key, newData )
+
+        return invalidated
+