some progress on classes

src/bucketresources.py

@@ -0,0 +1,28 @@
+from enum import Enum
+
+
+class BucketResourceType(Enum):
+    NetworkLink = 'network_link'
+    CpuResource = 'cpu_resource'
+
+
+class BucketResource:
+    type: BucketResourceType = BucketResourceType.NetworkLink
+    currentUsage: int = 0
+    capacity: int = 0
+
+    def reserve(self, resource: int) -> bool:
+        if self.capacity == self.currentUsage or resource > self.capacity - self.currentUsage:
+            return False
+        else:
+            return True
+
+    def release(self, resource: int) -> bool:
+        if self.currentUsage == 0 or self.currentUsage - resource < 0:
+            return False
+        else:
+            return True
+
+    def releaseAll(self) -> bool:
+        self.currentUsage = 0
+        return True