#!/usr/bin/env python import inspect import os import unittest from multiprocessing import Process, Pipe from pickle import dumps import six from six import moves from framework import VppTestCase from aenum import Enum class SerializableClassCopy(object): """ Empty class used as a basis for a serializable copy of another class. """ pass def __repr__(self): return '' % self.__dict__ class RemoteClassAttr(object): """ Wrapper around attribute of a remotely executed class. """ def __init__(self, remote, attr): self._path = [attr] if attr else [] self._remote = remote def path_to_str(self): return '.'.join(self._path) def get_remote_value(self): return self._remote._remote_exec(RemoteClass.GET, self.path_to_str()) def __repr__(self): return self._remote._remote_exec(RemoteClass.REPR, self.path_to_str()) def __str__(self): return self._remote._remote_exec(RemoteClass.STR, self.path_to_str()) def __getattr__(self, attr): if attr[0] == '_': if not (attr.startswith('__') and attr.endswith('__')): raise AttributeError('tried to get private attribute: %s ', attr) self._path.append(attr) return self def __setattr__(self, attr, val): if attr[0] == '_': if not (attr.startswith('__') and attr.endswith('__')): super(RemoteClassAttr, self).__setattr__(attr, val) return self._path.append(attr) self._remote._remote_exec(RemoteClass.SETATTR, self.path_to_str(), True, value=val) def __call__(self, *args, **kwargs): ret = True if 'vapi' in self.path_to_str() else False return self._remote._remote_exec(RemoteClass.CALL, self.path_to_str(), ret, *args, **kwargs) class RemoteClass(Process): """ This class can wrap around and adapt the interface of another class, and then delegate its execution to a newly forked child process. Usage: # Create a remotely executed instance of MyClass object = RemoteClass(MyClass, arg1='foo', arg2='bar') object.start_remote() # Access the object normally as if it was an instance of your class. object.my_attribute = 20 print object.my_attribute print object.my_method(object.my_attribute) object.my_attribute.nested_attribute = 'test' # If you need the value of a remote attribute, use .get_remote_value method. This method is automatically called when needed in the context of a remotely executed class. E.g.: if (object.my_attribute.get_remote_value() > 20): object.my_attribute2 = object.my_attribute # Destroy the instance object.quit_remote() object.terminate() """ GET = 0 # Get attribute remotely CALL = 1 # Call method remotely SETATTR = 2 # Set attribute remotely REPR = 3 # Get representation of a remote object STR = 4 # Get string representation of a remote object QUIT = 5 # Quit remote execution PIPE_PARENT = 0 # Parent end of the pipe PIPE_CHILD = 1 # Child end of the pipe DEFAULT_TIMEOUT = 2 # default timeout for an operation to execute def __init__(self, cls, *args, **kwargs): super(RemoteClass, self).__init__() self._cls = cls self._args = args self._kwargs = kwargs self._timeout = RemoteClass.DEFAULT_TIMEOUT self._pipe = Pipe() # pipe for input/output arguments def __repr__(self): return moves.reprlib.repr(RemoteClassAttr(self, None)) def __str__(self): return str(RemoteClassAttr(self, None)) def __call__(self, *args, **kwargs): return self.RemoteClassAttr(self, None)() def __getattr__(self, attr): if attr[0] == '_' or not self.is_alive(): if not (attr.startswith('__') and attr.endswith('__')): if hasattr(super(RemoteClass, self), '__getattr__'): return super(RemoteClass, self).__getattr__(attr) raise AttributeError('missing: %s', attr) return RemoteClassAttr(self, attr) def __setattr__(self, attr, val): if attr[0] == '_' or not self.is_alive(): if not (attr.startswith('__') and attr.endswith('__')): super(RemoteClass, self).__setattr__(attr, val) return setattr(RemoteClassAttr(self, None), attr, val) def _remote_exec(self, op, path=None, ret=True, *args, **kwargs): """ Execute given operation on a given, possibly nested, member remotely. """ # automatically resolve remote objects in the arguments mutable_args = list(args) for i, val in enumerate(mutable_args): if isinstance(val, RemoteClass) or \ isinstance(val, RemoteClassAttr): mutable_args[i] = val.get_remote_value() args = tuple(mutable_args) for key, val in six.iteritems(kwargs): if isinstance(val, RemoteClass) or \ isinstance(val, RemoteClassAttr): kwargs[key] = val.get_remote_value() # send request args = self._make_serializable(args) kwargs = self._make_serializable(kwargs) self._pipe[RemoteClass.PIPE_PARENT].send((op, path, args, kwargs)) if not ret: 
# Copyright (c) 2018 Cisco and/or its affiliates.
# Licensed under the Apache License, Version