Added first version of DebugManager. Implemented draft of the rule engine

src/cache/FastCache.py

@@ -0,0 +1,43 @@
+class FastCache:
+    """
+    Simplest LRU cache
+    """
+
+    def __init__(self, max_size=256):
+        self.max_size = max_size
+        self.cache = {}
+        self.lru = []
+
+    def put(self, key, value):
+        if len(self.cache) == self.max_size:
+            del self.cache[self.lru.pop(0)]
+
+        if key in self.cache:
+            self.lru.remove(key)
+
+        self.cache[key] = value
+        self.lru.append(key)
+
+    def get(self, key):
+        try:
+            return self.cache[key]
+        except KeyError:
+            return None
+
+    def evict_by_key(self, predicate):
+        to_remove = []
+
+        for k, v in self.cache.items():
+            if predicate(k):
+                to_remove.append(k)
+
+        for k in to_remove:
+            self.lru.remove(k)
+            del self.cache[k]
+
+    def copy(self):
+        return self.cache.copy()
+
+    def clear(self):
+        self.cache.clear()
+        self.lru.clear()