mirror of
https://github.com/GNS3/gns3-server
synced 2024-10-10 09:58:55 +00:00
125 lines
3.3 KiB
Python
125 lines
3.3 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import asyncio
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from .vm_error import VMError
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from ..config import Config
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import logging
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log = logging.getLogger(__name__)
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class BaseVM:
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def __init__(self, name, identifier, port_manager):
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self._loop = asyncio.get_event_loop()
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self._queue = asyncio.Queue()
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self._name = name
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self._id = identifier
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self._created = asyncio.Future()
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self._port_manager = port_manager
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self._config = Config.instance()
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self._worker = asyncio.async(self._run())
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log.info("{type} device {name} [id={id}] has been created".format(type=self.__class__.__name__,
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name=self._name,
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id=self._id))
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@property
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def id(self):
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"""
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Returns the unique ID for this VM.
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:returns: id (integer)
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"""
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return self._id
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@property
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def name(self):
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"""
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Returns the name for this VM.
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:returns: name (string)
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"""
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return self._name
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@asyncio.coroutine
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def _execute(self, command):
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"""
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Called when we receive an event.
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"""
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raise NotImplementedError
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@asyncio.coroutine
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def _create(self):
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"""
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Called when the run loop start
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"""
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raise NotImplementedError
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@asyncio.coroutine
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def _run(self, timeout=60):
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try:
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yield from self._create()
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self._created.set_result(True)
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except VMError as e:
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self._created.set_exception(e)
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return
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while True:
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future, command = yield from self._queue.get()
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try:
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try:
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yield from asyncio.wait_for(self._execute(command), timeout=timeout)
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except asyncio.TimeoutError:
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raise VMError("{} has timed out after {} seconds!".format(command, timeout))
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future.set_result(True)
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except Exception as e:
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future.set_exception(e)
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def wait_for_creation(self):
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return self._created
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@asyncio.coroutine
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def start(self):
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"""
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Starts the VM process.
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"""
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raise NotImplementedError
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def put(self, *args):
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"""
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Add to the processing queue of the VM
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:returns: future
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"""
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future = asyncio.Future()
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try:
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args.insert(0, future)
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self._queue.put_nowait(args)
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except asyncio.qeues.QueueFull:
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raise VMError("Queue is full")
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return future
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