673 lines
28 KiB
Python
673 lines
28 KiB
Python
# -*- coding: utf-8 -*-
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# *****************************************************************************
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# NICOS, the Networked Instrument Control System of the MLZ
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# Copyright (c) 2009-2018 by the NICOS contributors (see AUTHORS)
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Module authors:
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# Markus Zolliker <markus.zolliker@psi.ch>
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#
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# *****************************************************************************
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"""managing SECoP server and connections
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SEC Node with added functionality for starting and stopping frappy servers
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connected to a SEC node
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"""
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import threading
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from nicos import config, session
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from nicos.core import Override, Param, Moveable, status, POLLER, SIMULATION, DeviceAlias, \
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Device, anytype, listof
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from nicos.devices.secop.devices import SecNodeDevice, NicosSecopClient
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from nicos.core.utils import USER, User, createThread
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from nicos.services.daemon.script import RequestError, ScriptRequest
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from nicos.utils.comparestrings import compare
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from nicos.devices.secop.devices import get_attaching_devices
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from nicos.commands.basic import AddSetup, CreateAllDevices, CreateDevice
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from servicemanager import FrappyManager, SeaManager
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SERVICES = FrappyManager.services
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def suggest(poi, allowed_keys):
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comp = {}
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for key in allowed_keys:
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comp[key] = compare(poi, key)
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comp = sorted(comp.items(), key=lambda t: t[1], reverse=True)
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return [m[0] for m in comp[:3] if m[1] > 2]
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def applyAliasConfig():
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"""Apply the desired aliases from session.alias_config.
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be more quiet than original
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"""
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# reimplemented from Session.applyAliasConfig
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# apply also when target dev name does not change, as the target device might have
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# be exchanged in the mean time
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for aliasname, targets in session.alias_config.items():
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if aliasname not in session.devices:
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continue # silently ignore
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aliasdev = session.getDevice(aliasname)
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for target, _ in sorted(targets, key=lambda t: -t[1]):
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if target in session.devices:
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try:
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aliasdev.alias = target
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except Exception:
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session.log.exception("could not set '%s' alias", aliasdev)
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break
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def cleanup_defunct():
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for devname, setupname in list(session.dynamic_devices.items()):
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dev = session.devices.get(devname)
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if dev and dev._defunct:
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devnames = [d.name for d, _ in get_attaching_devices(dev)]
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if devnames:
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session.log.warning('can not remove device %r due to dependencies on %s'
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% (devname, ', '.join(devnames)))
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else:
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session.destroyDevice(devname)
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session.dynamic_devices.pop(devname, None)
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def all_info(all_cfg, prefix='currently configured: '):
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addkwd = False
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info = []
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for srv in SERVICES:
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cfglist = all_cfg.get(srv)
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if cfglist is None:
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addkwd = True
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else:
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if isinstance(cfglist, str):
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cfglist = [cfglist]
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cfginfo = ','.join(c if isinstance(c, str)
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else f"<one of {', '.join(repr(v) for v in c)}>"
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for c in cfglist)
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if addkwd:
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info.append('%s=%r' % (srv, cfginfo))
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else:
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info.append(repr(cfginfo))
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return f"{prefix}frappy({', '.join(info)})"
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def get_frappy_config():
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try:
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return session.devices['frappy']
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except KeyError:
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session.log.error("the frappy device is not available - 'frappy' setup is not loaded")
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return None
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class FrappyConfig(Device):
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# respect the order: e.g. temperature_regulation must be after temperature
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# because it will not be added to envlist when temperature is the same device
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parameters = {
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'temperature': Param(
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'config for sample temperature', type=anytype, default={}),
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'temperature_regulation': Param(
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'config for temperature regulation', type=anytype, default={}),
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'magneticfield': Param(
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'config for magnetic field', type=anytype, default={}),
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'pressure': Param(
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'config for pressure', type=anytype, default={}),
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'rotation_z': Param(
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'config for sample rotation (to be used as a3)',
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type=anytype, default={}),
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'stick_rotation': Param(
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'config for stick rotation (not necessarily to be used as a3)',
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type=anytype, default={}),
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'nodes': Param(
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'list of names of potential SEC nodes',
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type=listof(str), default=[]),
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}
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meanings = list(parameters)
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meanings.remove('nodes')
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_trigger_change = None
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_previous_shown = None
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_previous_state = None
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_initial_config = None
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_servers_loaded = False
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def doInit(self, mode):
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if mode != SIMULATION and session.sessiontype != POLLER:
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self._trigger_change = threading.Event()
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for name in self.nodes:
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secnode = session.devices.get(name)
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if secnode:
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secnode.uri = ''
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createThread('frappy change notification', self.handle_notifications)
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def handle_notifications(self):
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controller = session.daemon_device._controller
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while True:
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# we do not wait for ever here, because there might be changes
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# on an unconnected service
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self._trigger_change.wait(15)
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self._trigger_change.clear()
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while self._trigger_change.wait(2): # triggered again within 2 sec
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self._trigger_change.clear()
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try:
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cfgs = self.check_services()
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changes, state, remarks = self.to_consider(cfgs)
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if state != self._previous_state and changes:
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self._previous_state = state
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cmd = 'frappy.has_changed() # inserted automatically when frappy or sea servers changed'
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controller.new_request(ScriptRequest(cmd, None, User('guest', USER)))
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except RequestError as e:
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session.log.error(f'can not queue request {e!r}')
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def to_consider(self, cfgs):
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"""return info from sea and frappy servers
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for a potential "please consider calling frappy(...)" message
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"""
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error, proposed, state, remarks = FrappyManager().get_server_state(config.instrument, cfgs)
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changes = dict(proposed)
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for service, guess in proposed.items():
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if guess is True:
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changes.pop(service)
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disconnected = set()
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for service, info in cfgs.items():
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if info == '<disconnected>':
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disconnected.add(service)
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if not changes.get(service):
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changes[service] = ''
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return changes, (proposed,) + state, remarks
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def check_services(self):
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cfgs = {}
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for secnodename in self.nodes:
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secnode = session.devices.get(secnodename)
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if secnode:
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cfgs[secnode.service] = secnode.get_info()
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return cfgs
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def start_services(self, main=None, stick=None, addons=None):
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"""start/stop frappy servers
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for example: start_services(main='xy', stick='')
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- restart main server with cfg='xy'
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- stop stick server
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- do not touch addons server
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in addition, if a newly given cfg is already used on a running server,
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this cfg is removed from the server (remark: cfg might be a comma separated list)
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"""
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services = {'main': main, 'stick': stick, 'addons': addons}
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for service, cfg in services.items():
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if cfg == '':
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seaconn = session.devices.get(f'se_sea_{service}')
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if seaconn and seaconn._attached_secnode:
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try:
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seaconn.communicate('frappy_remove %s' % service)
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except Exception:
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pass
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used_cfg = {}
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all_cfg = {}
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new_cfg = {}
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secnodes = {}
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remove_cfg = []
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for service, cfginfo in services.items():
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secnodes[service] = secnode = session.devices.get('se_' + service)
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chkinfo = ''
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if secnode:
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all_cfg[service] = chkinfo = secnode.get_info()
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if cfginfo is not None:
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new_cfg[service] = chkinfo = cfginfo
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# check cfg is not used twice
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for cfg in chkinfo.split(','):
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cfg = cfg.strip()
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if cfg and cfg != 'restart':
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prev = used_cfg.get(cfg)
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if prev:
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raise ValueError('%r can not be used in both %s and %s' % (cfg, prev, service))
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used_cfg[cfg] = service
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for service, cfginfo in reversed(list(new_cfg.items())):
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if cfginfo != all_cfg.get(service, ''):
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secnode = secnodes[service]
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if secnode:
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secnode('') # stop previous frappy server
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if new_cfg:
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for service, cfginfo in new_cfg.items():
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nodename = 'se_' + service
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secnode = secnodes[service]
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prev = all_cfg.get(service)
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if cfginfo != prev:
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if cfginfo == 'restart':
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cfginfo = prev
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if not cfginfo:
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continue
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if not secnode:
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if not cfginfo:
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continue
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AddSetup('frappy_' + service)
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secnode = session.devices[nodename]
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secnode(cfginfo)
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all_cfg[service] = secnode.get_info()
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CreateDevice(nodename)
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cleanup_defunct()
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CreateAllDevices()
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self.set_envlist()
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for secnode in remove_cfg:
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secnode.disable()
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self._cache.put(self, 'config', all_cfg)
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return all_cfg
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def __call__(self, *args, main=None, stick=None, addons=None, force=False):
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"""(re)start frappy server(s) with given configs and load setup if needed
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- without argument: list running frappy servers, restart failed frappy servers
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- frappy('<cfg>'): if available, the standard stick is added too
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- frappy(''): the stick is removed too
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- addons are not changed when not given
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- frappy(main='<cfg>') # main cfg is changed, but stick is kept
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- frappy('restart') # restart all frappy servers
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- frappy(stick='restart') # restart stick frappy server
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"""
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stickarg = stick
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confirmed = SeaManager().get_cfg(config.instrument, 'sea', True).split('/', 1)[0]
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if args:
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if main is not None:
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raise TypeError('got multiple values for main')
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main = args[0]
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if len(args) == 1: # special case: main given as single argument
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if main == 'restart':
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stick = 'restart'
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addons = 'restart'
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elif stick is None: # auto stick
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if main == '':
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stick = '' # remove stick with main
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else:
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stickcfg = main + 'stick'
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if FrappyManager().is_cfg(config.instrument, 'stick', stickcfg):
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# if a default stick is available, start this also
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stick = stickcfg
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else:
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stick = '' # remove stick when main has changed
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else:
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if stick is not None:
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raise TypeError('got multiple values for stick')
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stick, *alist = args[1:]
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if alist:
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if addons is not None:
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raise TypeError('got multiple values for addons')
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addons = ','.join(alist)
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elif main is None and stick is None and addons is None: # bare frappy() command
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self.show_config(self.check_services(), True)
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return
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if confirmed and confirmed != main and main not in (None, 'restart') and not force:
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session.log.warning('%r is plugged to the cryostat control rack', confirmed)
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cmd = all_info({'main': main, 'stick': stickarg, 'addons': addons}, '')[:-1] + ', force=True)'
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session.log.warning(f'if you are sure, use: %s', cmd)
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raise TypeError('refuse to override plugged device')
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self.show_config(self.start_services(main, stick, addons))
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def show_config(self, allcfg, show_server_state=False):
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changes, state, remarks = self.to_consider(allcfg)
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if show_server_state == 'auto':
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show_server_state = state != self._previous_shown
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if show_server_state:
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proposed, frappycfgs, seacfgs = state
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rows = [['server', 'frappy', 'sea', '']]
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for key, remark in remarks.items():
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rows.append([key if key in ('main', 'stick') else 'addons',
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frappycfgs.get(key, ''), seacfgs.get(key, ''), remark])
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wid = [max(len(v) for v in column) for column in zip(*rows)]
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# insert title underlines
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rows.insert(1, ['-' * w for w in wid[:-1]] + [''])
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for row in rows:
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session.log.info('%s', ' '.join(v.ljust(w) for w, v in zip(wid, row)))
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session.log.info('')
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# remove 'frappy.has_changed()' commands in script queue
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controller = session.daemon_device._controller
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controller.block_requests(r['reqid'] for r in controller.get_queue()
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if r['script'].startswith('frappy.has_changed()'))
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self._previous_state = self._previous_shown = state
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session.log.info(all_info(allcfg))
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if changes:
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info = all_info(changes, 'proposed cfg changes: ')
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session.log.info(info)
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session.log.warning('please consider to call: frappy.update() for doing above changes')
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if '?' in info:
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session.log.warning("but create cfg files first for items marked with '?'")
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def update(self):
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changes = self.to_consider(self.check_services())[0]
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self.show_config(self.start_services(**changes))
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def initial_restart_cfg(self, service):
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"""get cfg for (re)start of the service
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returns:
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cfg, when the server has to (re)started with a new cfg
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True, when the server is running and does not need a restart
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None, when the server is not running, but does not need a restart
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"""
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if self._servers_loaded:
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return None
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if self._initial_config is None:
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# we do this only once for all services
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fm = FrappyManager()
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running = fm.get_cfg(config.instrument, None)
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cache = self._getCache()
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cfgs = {}
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for serv, secnode in zip(fm.services, self.nodes):
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cfg = running.get(serv)
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if not cfg and cache:
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cfg = cache.get(secnode, 'value')
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if cfg:
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cfgs[serv] = cfg
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running_main = running.get('main')
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if running_main and running_main != cfgs.get('main'):
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# new main device: clear old stick
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running_stick = running.get('stick')
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if running_stick:
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cfgs['stick'] = running_stick
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else:
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cfgs.pop('stick', None)
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error, proposed, state, remarks = fm.get_server_state(config.instrument, cfgs)
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self._initial_config = proposed
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if not error:
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# do not show server state on startup
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self._previous_state = self._previous_shown = state
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return self._initial_config.get(service)
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def has_changed(self, show_server_state='auto'):
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self._servers_loaded = True
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self.show_config(self.check_services(), show_server_state)
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def remove_aliases(self):
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for meaning in self.meanings:
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info = getattr(self, meaning)
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aliasnames = info.get('alias', [])
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if isinstance(aliasnames, str):
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aliasnames = [aliasnames]
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for aliasname in aliasnames:
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aliasdev = session.devices.get(aliasname)
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if aliasdev:
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session.destroyDevice(aliasname)
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session.configured_devices.pop(aliasname, None)
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session.dynamic_devices.pop(aliasname, None)
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def get_se_aliases(self):
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result = {}
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for meaning in self.meanings:
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info = getattr(self, meaning)
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aliasnames = info.get('alias', [])
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if isinstance(aliasnames, str):
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aliasnames = [aliasnames]
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for aliasname in aliasnames:
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aliasdev = session.devices.get(aliasname)
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if isinstance(aliasdev, DeviceAlias):
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result[aliasname] = aliasdev
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return result
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def set_envlist(self):
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"""create aliases and envlist for SECoP devices
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depending on their meaning
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"""
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previous_aliases = self.get_se_aliases()
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# self.remove_aliases()
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nodedevs = filter(None, [session.devices.get(devname) for devname in self.nodes])
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sample_devices = {}
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for nodedev in nodedevs:
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secnode = nodedev._secnode
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if not secnode:
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continue
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for devname, (_, desc) in nodedev.setup_info.items():
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secop_module = desc['secop_module']
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try:
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meaning = secnode.modules[secop_module]['properties'].get('meaning')
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except KeyError:
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meaning = None
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if meaning:
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meaning_name, importance = meaning
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sample_devices.setdefault(meaning_name, []).append((importance, devname))
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newenv = {} # to be added to envlist (dict [devname] of aliasname)
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to_remove = set() # items to be removed from previous envlist, if present
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for meaning in self.meanings:
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info = getattr(self, meaning)
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aliasnames = info.get('alias')
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if aliasnames is None:
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aliasnames = []
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elif isinstance(aliasnames, str):
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aliasnames = [aliasnames]
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aliascfg = info.get('targets', {})
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predefined_alias = info.get('predefined_alias')
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if predefined_alias:
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aliases = [a for a in predefined_alias
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if isinstance(session.devices.get(a), DeviceAlias)]
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if aliases:
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if len(aliases) > 1:
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raise TypeError(f'do know to which of {aliases} {meaning} to assign to')
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alias_config = session.alias_config.setdefault(aliases[0], [])
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alias_config.extend(list(aliascfg.items()))
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elif not aliasnames:
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session.log.warn("neither 'predefined_alias' nor 'alias' configured. skip %s", meaning)
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continue
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importance_list = sample_devices.get(meaning, [])
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importance_list.extend([(nr, nam) for nam, nr in aliascfg.items() if nam in session.devices])
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importance_list = sorted(importance_list, reverse=True)
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session.log.debug('%s: %r', meaning, importance_list)
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for _, devname, in importance_list:
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dev = session.devices.get(devname)
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if dev is None or info.get('drivable_only', False) and not isinstance(dev, Moveable):
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continue
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for aliasname in aliasnames:
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devcfg = ('nicos.core.DeviceAlias', {})
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session.configured_devices[aliasname] = devcfg
|
|
session.dynamic_devices[aliasname] = 'frappy' # assign to frappy setup
|
|
aliasdev = previous_aliases.pop(aliasname, None)
|
|
if aliasdev:
|
|
if aliasdev.alias != devname:
|
|
session.log.debug('change alias %r -> %r', aliasname, devname)
|
|
else:
|
|
session.log.debug('create alias %r -> %r', aliasname, devname)
|
|
aliasdev = session.createDevice(aliasname, recreate=True, explicit=True)
|
|
aliasdev.alias = devname
|
|
if aliasnames:
|
|
# only the first item of aliasnames is added to the envlist
|
|
aliasname = aliasnames[0]
|
|
to_remove.add(devname)
|
|
to_remove.add(aliasname)
|
|
if devname not in newenv and info.get('envlist', True):
|
|
# example: when 'temperature' and 'temperature_regulation' are the
|
|
# same device, the first one is kept
|
|
newenv[devname] = aliasname
|
|
break
|
|
else:
|
|
to_remove.update(aliasnames)
|
|
|
|
for aliasname in previous_aliases:
|
|
session.destroyDevice(aliasname)
|
|
session.configured_devices.pop(aliasname, None)
|
|
session.dynamic_devices.pop(aliasname, None)
|
|
|
|
applyAliasConfig() # for other aliases
|
|
|
|
envlist = [k for k in session.experiment.envlist if k not in to_remove] + list(newenv.values())
|
|
if envlist != session.experiment.envlist:
|
|
removed = set(session.experiment.envlist).difference(envlist)
|
|
session.experiment.setEnvironment(envlist)
|
|
if removed:
|
|
session.log.info('removed %s from environment', ', '.join(removed))
|
|
if newenv:
|
|
session.log.info('added %s to environment', ', '.join(newenv.values()))
|
|
|
|
|
|
class FrappyNode(SecNodeDevice, Moveable):
|
|
"""SEC node device
|
|
|
|
with ability to start / restart / stop the frappy server
|
|
"""
|
|
|
|
parameter_overrides = {
|
|
'target': Override(description='configuration for the frappy server or host:port',
|
|
type=str, default=''),
|
|
}
|
|
parameters = {
|
|
'service': Param('frappy service name (main, stick or addons)', type=str, default=''),
|
|
'param_category': Param("category of parameters\n\n"
|
|
"set to 'general' if all parameters should appear in the datafile header",
|
|
type=str, default='', settable=True),
|
|
}
|
|
|
|
_cfgvalue = None
|
|
_lastcfg = None
|
|
|
|
def doStart(self, value):
|
|
if value == 'None':
|
|
value = None
|
|
self.restart(value)
|
|
|
|
def doInit(self, mode):
|
|
if mode == SIMULATION or session.sessiontype == POLLER:
|
|
super().doInit(mode)
|
|
else:
|
|
fc = session.devices.get('frappy')
|
|
if fc:
|
|
cfg = fc.initial_restart_cfg(self.service)
|
|
if isinstance(cfg, str): # may also be None or True
|
|
self.restart(cfg)
|
|
if cfg is None: # None means: server is not running, and does not need to be restarted
|
|
self._disconnect()
|
|
return
|
|
try:
|
|
self._connect()
|
|
except Exception:
|
|
pass
|
|
|
|
def doStop(self):
|
|
"""never busy"""
|
|
|
|
def doRead(self, maxage=0):
|
|
return self._cfgvalue or ''
|
|
|
|
def createDevices(self):
|
|
cfg = self.read()
|
|
super().createDevices()
|
|
if cfg != self._lastcfg:
|
|
fc = get_frappy_config()
|
|
if fc:
|
|
fc._trigger_change.set()
|
|
if self.param_category:
|
|
for devname, (_, devcfg) in self.setup_info.items():
|
|
params_cfg = devcfg['params_cfg']
|
|
dev = session.devices[devname]
|
|
for pname, pargs in params_cfg.items():
|
|
pinfo = dev.parameters[pname]
|
|
if not pinfo.category:
|
|
pinfo.category = self.param_category
|
|
|
|
def nodeStateChange(self, online, state):
|
|
super().nodeStateChange(online, state)
|
|
if online:
|
|
if self._cfgvalue is None:
|
|
self._cfgvalue = FrappyManager().get_cfg(config.instrument, self.service)
|
|
if not self._cfgvalue:
|
|
self._cfgvalue = self.uri
|
|
else:
|
|
self._cfgvalue = None
|
|
cfg = self.read()
|
|
if self._lastcfg != cfg:
|
|
self._lastcfg = cfg
|
|
fc = get_frappy_config()
|
|
if fc:
|
|
fc._trigger_change.set()
|
|
|
|
def disable(self):
|
|
seaconn = session.devices.get('sea_%s' % self.service)
|
|
if seaconn and seaconn._attached_secnode:
|
|
seaconn.communicate('frappy_remove %s' % self.service)
|
|
self._set_status(*self._status)
|
|
|
|
def _set_status(self, code, text):
|
|
if self.uri == '':
|
|
code, text = status.DISABLED, 'disabled'
|
|
SecNodeDevice._set_status(self, code, text)
|
|
|
|
def restart(self, cfg=None):
|
|
"""restart frappy server
|
|
|
|
:param cfg: config for frappy server, if not given, restart with the same config
|
|
"""
|
|
if cfg is None:
|
|
cfg = self._cfgvalue
|
|
ins = config.instrument
|
|
fm = FrappyManager()
|
|
info = fm.get_ins_info(ins)
|
|
running_cfg = fm.get_cfg(ins, self.service) or ''
|
|
if cfg is None:
|
|
self.log.error('can not restart - previous cfg unknown')
|
|
return
|
|
if cfg != running_cfg:
|
|
self.disable()
|
|
if running_cfg:
|
|
self._disconnect()
|
|
fm.do_stop(ins, self.service)
|
|
is_cfg = cfg and ':' not in cfg
|
|
if is_cfg:
|
|
available_cfg = None
|
|
for cfgitem in cfg.split(','):
|
|
if not fm.is_cfg(config.instrument, self.service, cfgitem):
|
|
if available_cfg is None:
|
|
available_cfg = fm.all_cfg(config.instrument, self.service)
|
|
suggestions = suggest(cfgitem, available_cfg)
|
|
if suggestions:
|
|
session.log.error('%s unknown, did you mean: %s' % (cfgitem, ', '.join(suggestions)))
|
|
if available_cfg is not None:
|
|
raise ValueError('use "frappy_list()" to get a list of valid frappy configurations')
|
|
uri = 'localhost:%d' % info[self.service]
|
|
else:
|
|
uri = cfg
|
|
if uri != self.uri:
|
|
self.uri = '' # disconnect
|
|
if uri:
|
|
if is_cfg:
|
|
fm.do_start(ins, self.service, cfg, logger=self.log)
|
|
self.uri = uri # connect
|
|
self._cfgvalue = cfg
|
|
if self._cache:
|
|
self._cache.put(self, 'value', cfg)
|
|
self._setROParam('target', cfg)
|
|
|
|
def _disconnect(self):
|
|
super()._disconnect()
|
|
self._setROParam('target', '')
|
|
|
|
def get_info(self):
|
|
result = self.doRead() or ''
|
|
code, text = self.status()
|
|
if not result and self.target:
|
|
return '<disconnected>'
|
|
if code == status.OK or result == '':
|
|
return result
|
|
if (code, text) == (status.ERROR, 'reconnecting'):
|
|
return '%s (frappy not running)' % result
|
|
return '%s (%s)' % (result, text)
|
|
|
|
def doFinish(self):
|
|
return False # avoid warning in finish() when target does not match
|