add command cache

cccli/command/__init__.py

@@ -18,3 +18,4 @@ from cccli.command.vm import *
 # by command module
 from cccli.command.list import Command_list
 from cccli.command.expert import Command_expert
+from cccli.command.cache import Command_cache

cccli/command/cache.py

+#!/usr/bin/env python
+#coding=utf8
+
+'''
+CloudControl cache command
+'''
+from cccli.exception import *
+from sjrpc.core.exceptions import *
+from cccli.printer import Printer, color
+from cccli.command.command import Command
+
+class Command_cache(Command):
+    '''Show server cache statistics'''
+
+    def __call__(self, argv):
+        try:
+            d = self.cli.rpc.call("dbstats")
+            for i,v in d.items():
+                self.printer.out("%s: %s"%(i,v))
+        except RpcError as e:
+            raise cmdError("RPCError: %s"%str(e))