backend.fcmapp.Cache.hdel() - Code Metrics - Inspection of "convert queue names to enum" - dfoderick/fullcycle - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 00153b...43cb7b )

by Dave
created 2018-09-10 05:19 UTC
backend.fcmapp.Cache.hdel() A

↳ Parent: backend.fcmapp
Complexity

Conditions
Size

Total Lines	3
Code Lines	2
Duplication

Lines	0
Ratio	0 %
Importance

Changes
Metric	Value
cc	1
eloc	2
nop	3
dl	0
loc	3
rs	10
c	0
b	0
f	0
'''Application Service layer for Full Cycle Mining
Gateway into most of application functionality'''
import sys
import os
import datetime
import logging
import json
import base64
from collections import defaultdict
from colorama import init, Fore
import pika
from sqlalchemy.orm import sessionmaker
from sqlalchemy import create_engine
from domain.mining import Miner, Pool, MinerPool, AvailablePool, MinerCurrentPool, MinerStatistics, MinerStatus
from domain.rep import MinerRepository, PoolRepository, LoginRepository, RuleParametersRepository, BaseRepository
#from domain.miningrules import RuleParameters
from domain.sensors import Sensor, SensorValue
from messaging.messages import Message, MessageSchema, MinerMessageSchema, ConfigurationMessageSchema
from messaging.sensormessages import SensorValueSchema
from messaging.schema import MinerSchema, MinerStatsSchema, MinerCurrentPoolSchema, AvailablePoolSchema, PoolSchema
from helpers.queuehelper import QueueName, Queue, QueueEntry, QueueType
from helpers.camerahelper import take_picture
from helpers.antminerhelper import setminertoprivileged, privileged, setprivileged, setrestricted, waitforonline, restartmining, stopmining, restart, set_frequency
from helpers.temperaturehelper import readtemperature
from helpers.telegramhelper import sendalert, sendphoto
from backend.fcmcache import Cache, CacheKeys

class ComponentName:
    '''names of components, corresponds to queue login names'''
    fullcycle = 'fullcycle'
    rules = 'rules'

class Component(object):
    '''A component is a unit of execution of FCM'''
    def __init__(self, componentname, option=''):
        self.app = ApplicationService(component=componentname, option=option)
        #was a queue, now its a channel
        self.listeningqueue = None

    def listen(self):
        if self.listeningqueue:
            self.app.bus.listen(self.listeningqueue)

class ServiceName:
    '''names of infrastructure services'''
    messagebus = 'rabbit'
    cache = 'redis'
    database = 'mysql'
    email = 'gmail'

class InfrastructureService:
    '''configuration for a dependency'''
    name = ''
    connection = ''
    host = ''
    port = ''
    user = ''
    password = ''
    def __init__(self, name, connection, host, port, user, password):
        self.name = name
        self.connection = connection
        self.host = host
        self.port = port
        self.user = user
        self.password = password


class Antminer():
    def __init__(self, config, login):
        self.__config = config
        self.__login = login

    def set_privileged(self, miner):
        setprivileged(miner, self.__login, self.__config['provision.apiallow.privileged'])

    def setminertoprivileged(self, miner):
        return setminertoprivileged(miner, self.__login, self.__config['provision.apiallow.privileged'])

    def set_restricted(self, miner):
        setrestricted(miner, self.__login, self.__config['provision.apiallow.restricted'])

    def waitforonline(self, miner):
        return waitforonline(miner)

    def getaccesslevel(self, miner):
        return privileged(miner)

    def restart(self, miner):
        return restart(miner)

    def stopmining(self, miner):
        '''stop miner through ssh.'''
        return stopmining(miner, self.__login)

    def restartssh(self, miner):
        '''restart miner through ssh. start mining again'''
        return restartmining(miner, self.__login)

    def set_frequency(self, miner, frequency):
        return set_frequency(miner, self.__login, frequency)


class Bus:
    _connection = None
    _durable = False

    def __init__(self, servicelogin):
        self._servicelogin = servicelogin
        self._userlogin = self._servicelogin.user
        if self._userlogin is None:
            self._userlogin = 'fullcycle'

    def connection(self):
        if not self._connection:
            credentials = pika.PlainCredentials(self._userlogin, self._servicelogin.password)
            parameters = pika.ConnectionParameters(self._servicelogin.host, self._servicelogin.port, '/', credentials)
            self._connection = pika.BlockingConnection(parameters)
        return self._connection

    def close(self):
        if self._connection:
            self._connection.close()

    def sleep(self, seconds):
        if self._connection:
            self._connection.sleep(seconds)

    def get_queue_name(self, queue_name):
        name_of_q = queue_name
        if isinstance(queue_name, QueueName):
            name_of_q = QueueName.value(queue_name)
        return name_of_q

    def publish(self, queue_name, msg, exchange=''):
        """Publishes message on new channel"""
        localchannel = self.connection().channel()
        localchannel.queue_declare(queue=self.get_queue_name(queue_name), durable=self._durable)
        localchannel.basic_publish(exchange=exchange, routing_key=name_of_q, body=msg)

        localchannel.close()

    def broadcast(self, exchange_name, msg):
        '''broadcast a message to anyone that is listening'''
        localchannel = self.connection().channel()
        localchannel.exchange_declare(exchange=self.get_queue_name(exchange_name), exchange_type='fanout')
        localchannel.basic_publish(exchange=self.get_queue_name(exchange_name), routing_key='', body=msg)
        localchannel.close()

    def subscribe(self, name, callback, no_acknowledge=True, prefetch_count=1):
        """basic subscribe messages from one queue
        remember to listen to channel to get messages
        """
        localchannel = self.connection().channel()
        localchannel.queue_declare(queue=self.get_queue_name(name))
        localchannel.basic_qos(prefetch_count=prefetch_count)
        localchannel.basic_consume(callback, queue=self.get_queue_name(name), no_ack=no_acknowledge)
        return localchannel

    def subscribe_broadcast(self, name, callback, no_acknowledge=True, prefetch_count=1):
        """Consumes messages from one queue"""
        localchannel = self.connection().channel()
        localchannel.exchange_declare(exchange=self.get_queue_name(name), exchange_type='fanout')

        result = localchannel.queue_declare(exclusive=True)
        queue_name = result.method.queue
        localchannel.queue_bind(exchange=self.get_queue_name(name), queue=queue_name)

        localchannel.basic_qos(prefetch_count=prefetch_count)
        localchannel.basic_consume(callback, queue=queue_name, no_ack=no_acknowledge)
        return localchannel

    def listen(self, channel):
        '''listen to queue. this is a blocking call'''
        channel.start_consuming()

    def acknowledge(self, channel, delivery_tag):
        '''acknowledge that message was processed'''
        channel.basic_ack(delivery_tag)

    def reject(self, channel, delivery_tag):
        '''tell queue that message was not processed'''
        channel.basic_nack(delivery_tag)



class ApplicationService:
    '''Application Services'''
    programnamefull = ''
    programname = ''
    component = ComponentName.fullcycle
    loglevel = 0
    #true if user passed in -now command line argument
    isrunnow = False
    #dictionary of queues managed by this app
    _queues = {}
    _channels = []
    #the startup directory
    homedirectory = None
    __cache = None
    __bus = None
    __config = {}
    __logger = None
    __logger_debug = None
    __logger_error = None
    antminer = None

    def __init__(self, component=ComponentName.fullcycle, option=None, announceyourself=False):
        if self.component == ComponentName.fullcycle:
            self.print('Starting FCM Init')
        self.component = component
        self.initargs(option)
        self.startupstuff()
        if self.component == ComponentName.fullcycle:
            self.print('Starting FCM Configuration')
        self.setup_configuration()
        self.initlogger()
        self.initmessaging()
        #this is slow. should be option to opt out of cache?
        if self.component == ComponentName.fullcycle:
            self.loginfo('Starting FCM Cache')
        self.initcache()
        self.initbus()
        self.init_application()
        self.init_sensors()

        if announceyourself:
            self.sendqueueitem(QueueEntry(QueueName.Q_LOG, self.stamp('Started {0}'.format(self.component)), QueueType.broadcast))

    def initargs(self, option):
        '''process command line arguments'''
        if sys.argv:
            self.programnamefull = sys.argv[0]
            self.programname = os.path.basename(self.programnamefull)
        firstarg = option
        if len(sys.argv) > 1:
            firstarg = sys.argv[1]
        if firstarg is not None:
            if firstarg == '-now':
                self.isrunnow = True

    def startupstuff(self):
        '''start up the application'''
        self.homedirectory = os.path.dirname(__file__)
        #used with colorama on windows
        init(autoreset=True)

    def initmessaging(self):
        '''start up messaging'''
        self._schemamsg = MessageSchema()

    def initcache(self):
        '''start up cache'''
        try:
            cachelogin = self.getservice(ServiceName.cache)
            self.__cache = Cache(cachelogin)
        except Exception as ex:
            #cache is offline. try to run in degraded mode
            self.logexception(ex)

    def startup(self):
        self.initminercache()
        self.initpoolcache()

    def initbus(self):
        '''start up message bus'''
        login = self.getservice(ServiceName.messagebus)
        self.__bus = Bus(login)

    @property
    def bus(self):
        return self.__bus

    def init_sensors(self):
        self.sensor = Sensor('controller', 'DHT22', 'controller')

    def init_application(self):
        self.antminer = Antminer(self.__config, self.sshlogin())

    @property
    def isdebug(self):
        return sys.flags.debug

    def getconfigfilename(self, configfilename):
        '''get the contents of a config file'''
        return os.path.join(self.homedirectory, configfilename)

    def setup_configuration(self):
        '''configuration is loaded once at startup'''
        raw = BaseRepository().readrawfile(self.getconfigfilename('config/fullcycle.conf'))
        self.__config = json.loads(raw)
        self.applicationid = self.configuration('applicationid')
        self.loglevel = self.configuration('loglevel')

    def configuration(self, key):
        if not key in self.__config: return None
        return self.__config[key]

    def is_enabled_configuration(self, key):
        lookupkey = '{0}.enabled'.format(key)
        if not lookupkey in self.__config:
            return False
        value = self.__config[lookupkey]
        if isinstance(value, str):
            return value == 'true' or value == 'True'
        return value

    def initpoolcache(self):
        if self.__cache.get(CacheKeys.pools) is None:
            spools = PoolRepository().readrawfile(self.getconfigfilename('config/pools.conf'))
            self.tryputcache(CacheKeys.pools, spools)
        for pool in self.pools():
            #pool isinstance of Pool
            availablepool = AvailablePool(pool.pool_type, pool, pool.url, pool.user, pool.password, pool.priority)
            minerpool = MinerPool(miner=None, priority=0, pool=availablepool)
            self.putpool(pool)
            self.add_pool(minerpool)

    def initminercache(self):
        '''put known miners into cache'''
        if self.__cache.get(CacheKeys.miners) is None:
            sminers = MinerRepository().readrawfile(self.getconfigfilename('config/miners.conf'))
            self.tryputcache(CacheKeys.miners, sminers)

        for miner in self.miners():
            #status is not persisted yet so init from name
            if miner.is_manually_disabled():
                miner.status = MinerStatus.Disabled
            if self.getminer(miner) is None:
                self.putminer(miner)

    def cacheclear(self):
        '''clear the cache'''
        self.__cache.purge()

    def initlogger(self):
        '''set up logging application info'''
        self.__logger = self.setup_logger('fcmapp', 'fcm.log', logging.INFO)

        self.__logger_debug = self.setup_logger('fcmdebug', 'fcm.bug', logging.DEBUG)

        self.__logger_error = self.setup_logger('fcmerror', 'fcm.err', logging.ERROR)

    def setup_logger(self, logger_name, log_file, level=logging.INFO):
        '''start logger'''
        logr = logging.getLogger(logger_name)
        formatter = logging.Formatter('%(asctime)s %(levelname)s %(message)s')
        #by default will append. use mode='w' to overwrite
        file_handler = logging.FileHandler(log_file)
        file_handler.setFormatter(formatter)
        logr.addHandler(file_handler)
        # is setting stream necessary
        stream_handler = logging.StreamHandler()
        stream_handler.setFormatter(formatter)
        logr.setLevel(level)
        return logr

    def loginfo(self, message):
        '''log informational message'''
        logmsg = '{0}: {1}'.format(self.programname, message)
        self.__logger.info(logmsg)
        print(message)

    def logerror(self, message):
        '''log error'''
        logmsg = '{0}: {1}'.format(self.programname, message)
        self.__logger_error.error(logmsg)
        print(Fore.RED+logmsg)

    def logdebug(self, message):
        '''log debug message'''
        if not self.loglevel or self.loglevel == 0:
            return
        logmsg = '{0}: {1}'.format(self.programname, message)
        self.__logger_debug.debug(logmsg)
        print(Fore.GREEN+logmsg)

    def print(self, message):
        '''echo message to screen'''
        print('{0}: {1}'.format(self.now(), message))

    def now(self):
        '''current time formatted as friendly string'''
        return self.formattime(datetime.datetime.now())

    def formattime(self, time):
        '''standard format for time'''
        return time.strftime('%Y-%m-%d %H:%M:%S')

    #region lookups
    #todo: move to configurations section
    def miners(self):
        '''configured miners'''
        miners = MinerRepository().readminers(self.getconfigfilename('config/miners.conf'))
        return miners

    def knownminers(self):
        '''for now just return a list of miners
        later should consider returning a list that is easily searched and filtered
        '''
        dknownminers = self.__cache.gethashset(CacheKeys.knownminers)
        if dknownminers is not None and dknownminers:
            #get list of miners from cache
            return self.deserializelistofstrings(list(dknownminers.values()))
        knownminers = self.miners()
        return knownminers

    def allminers(self):
        '''combined list of discovered miners and configured miners'''
        allminers = self.knownminers()
        for miner in self.miners():
            foundminer = [x for x in allminers if x.key() == miner.key()]
            if not foundminer:
                allminers.append(miner)
        return allminers

    def knownsensors(self):
        dknownsensors = self.__cache.gethashset(CacheKeys.knownsensors)
        if dknownsensors is not None and dknownsensors:
            return self.deserializelist_withschema(SensorValueSchema(), list(dknownsensors.values()))
        return None

    def knownpools(self):
        dknownpools = self.__cache.gethashset(CacheKeys.knownpools)
        if dknownpools:
            return self.deserializelist_withschema(AvailablePoolSchema(), list(dknownpools.values()))
        return None

    def addknownsensor(self, sensorvalue):
        val = self.jsonserialize(SensorValueSchema(), sensorvalue)
        self.__cache.putinhashset(CacheKeys.knownsensors, sensorvalue.sensorid, val)

    def minersummary(self, max_number=10):
        '''show a summary of known miners
        '''
        mode = self.configuration('summary')
        if not mode: mode = 'auto'
        knownminers = self.knownminers()
        if len(knownminers) <= max_number:
            return '\n'.join([m.summary() for m in knownminers])
        groupbystatus = defaultdict(list)
        for miner in knownminers:
            groupbystatus[miner.status].append(miner)
        return '\n'.join(['{0}: {1}'.format(s, self.summary_by_status(s, groupbystatus[s])) for s in groupbystatus])

    def summary_by_status(self, key, minerlist):
        if key == 'online':
            return '{0} miners hash {1}'.format(self.summarize_count(minerlist), self.summarize_hash(minerlist))
        return self.summarize_count(minerlist)

    def summarize_count(self, minerlist):
        return len(minerlist)

    def summarize_hash(self, minerlist):
        return sum(miner.minerstats.currenthash for miner in minerlist)

    def addknownminer(self, miner):
        '''add miner to known miners list'''
        val = self.serialize(miner)
        self.__cache.putinhashset(CacheKeys.knownminers, miner.key(), val)

    def updateknownminer(self, miner):
        '''update known miner in cache'''
        sminer = self.__cache.getfromhashset(CacheKeys.knownminers, miner.key())
        memminer = self.deserialize(MinerSchema(), self.safestring(sminer))
        if memminer is None:
            memminer = miner
        else:
            #merge new values
            memminer.updatefrom(miner)
        val = self.serialize(memminer)
        self.__cache.putinhashset(CacheKeys.knownminers, miner.key(), val)

    #region Pools
    def pools(self):
        '''configured pools'''
        pools = PoolRepository().readpools(self.getconfigfilename('config/pools.conf'))
        return pools

    def findpool(self, minerpool):
        '''find a pool in list'''
        if minerpool is None: return None
        for pool in self.pools():
            if minerpool.currentpool == pool.url and minerpool.currentworker.startswith(pool.user):
                return pool
        return None

    def getpool(self, miner: Miner):
        '''get pool from cache'''
        valu = self.trygetvaluefromcache(miner.name + '.pool')
        if valu is None: return None
        entity = MinerCurrentPool(miner, **self.deserialize(MinerCurrentPoolSchema(), valu))
        return entity

    def add_pool(self, minerpool: MinerPool):
        '''see if pool is known or not, then add it'''
        knownpool = self.__cache.getfromhashset(CacheKeys.knownpools, minerpool.pool.key)
        if not knownpool:
            val = self.jsonserialize(AvailablePoolSchema(), minerpool.pool)
            self.__cache.putinhashset(CacheKeys.knownpools, minerpool.pool.key, val)

    def update_pool(self, key, pool: AvailablePool):
        self.__cache.hdel(CacheKeys.knownpools, key)
        knownpool = self.__cache.getfromhashset(CacheKeys.knownpools, pool.key)
        if not knownpool:
            val = self.jsonserialize(AvailablePoolSchema(), pool)
            self.__cache.putinhashset(CacheKeys.knownpools, pool.key, val)
    #endregion

    def sshlogin(self):
        '''return contents of login file'''
        return self.readlogin('ftp.conf')

    def readlogin(self, filename):
        '''read login file configuration'''
        login = LoginRepository().readlogins(self.getconfigfilename('config/'+filename))
        return login

    def ruleparameters(self):
        '''rules parameters'''
        return RuleParametersRepository().readrules(self.getconfigfilename('config/'+'rules.conf'))

    def getservice(self, servicename):
        '''get a service by name. should be repository'''
        file_name = self.getconfigfilename('config/services.conf')
        with open(file_name, encoding='utf-8-sig') as config_file:
            content = json.loads(config_file.read())
        services = [InfrastructureService(**s) for s in content]
        return next((s for s in services if s.name == servicename), None)


    def getservice_useroverride(self, servicename):
        service = self.getservice(servicename)
        service.user = self.component
        return service
    #endregion lookups

    def listen(self, qlisten):
        """Goes into listening mode on a queue"""
        try:
            self.bus.listen(qlisten)
        except KeyboardInterrupt:
            self.shutdown()
        except BaseException as unhandled:
            self.unhandledexception(unhandled)

    def registerqueue(self, qregister: Queue):
        '''register a queue'''
        self.logdebug(self.stamp('Registered queue {0}'.format(qregister.queue_name)))
        if qregister.queue_name not in self._queues.keys():
            self._queues[qregister.queue_name] = qregister

    def shutdown(self, exitstatus=0):
        '''shut down app services'''
        self.loginfo('Shutting down fcm app...')
        self.close_channels()
        self.closequeues()
        if self.__bus:
            self.bus.close()
        if self.__cache is not None:
            self.__cache.close()
        sys.exit(exitstatus)

    def closequeue(self, thequeue):
        '''close the queue'''
        if not thequeue: return
        try:
            if thequeue is not None:
                self.logdebug(self.stamp('closing queue {0}'.format(thequeue.queue_name)))
                thequeue.close()
            del self._queues[thequeue.queue_name]
        except Exception as ex:
            self.logexception(ex)

    def closequeues(self):
        '''close a bunch of queues'''
        for k in list(self._queues):
            self.closequeue(self._queues[k])

    def close_channel(self, chan):
        if not chan: return
        try:
            if chan.name in self._channels:
                self.logdebug(self.stamp('closing channel {0}'.format(chan.name)))
                chan.close()
                del self._channels[chan.name]
        except Exception as ex:
            self.logexception(ex)

    def close_channels(self):
        '''close all channels'''
        for chan in list(self._channels):
            self.close_channel(self._channels[chan])

    def unhandledexception(self, unhandled):
        '''what to do when there is an exception that app cannot handle'''
        self.logexception(unhandled)

    def exceptionmessage(self, ex):
        '''gets exception message even when it doesnt have one'''
        exc_type, _, exc_tb = sys.exc_info()
        exmsg = getattr(ex, 'message', repr(ex))
        return '{0}:{1}:{2}'.format(exc_type, exc_tb.tb_lineno, exmsg)

    def logexception(self, ex):
        '''log an exception'''
        self.logerror(self.exceptionmessage(ex))

    def sendlog(self, logmessage):
        '''send message to log queue'''
        item = QueueEntry(QueueName.Q_LOG, logmessage, 'broadcast')
        self.sendqueueitem(item)
        print(logmessage)

    def subscribe(self, name, callback, no_acknowledge=True, prefetch=1):
        '''subscribe to a queue'''
        chan = self.bus.subscribe(name, callback, no_acknowledge=no_acknowledge, prefetch_count=prefetch)
        print('Waiting for messages on {0}. To exit press CTRL+C'.format(name))
        return chan

    def listen_to_broadcast(self, broadcast_name, callback, no_acknowledge=True):
        thebroadcast = self.bus.subscribe_broadcast(broadcast_name, callback, no_acknowledge)
        print('Waiting for messages on {0}. To exit press CTRL+C'.format(broadcast_name))
        self.bus.listen(thebroadcast)
        #never returns becuase listen is blocking
        return thebroadcast

    def trypublish(self, queue_name, msg: str):
        '''publish a message to the queue'''
        try:
            self.bus.publish(queue_name, msg)
            return True
        except pika.exceptions.ConnectionClosed as ex:
            logmessage = 'Error publishing to {0} {1}'.format(queue_name, self.exceptionmessage(ex))
            self.logerror(logmessage)
            return False

    def trybroadcast(self, exchange_name, msg):
        '''broadcast a message to all queue listeners'''
        try:
            self.bus.broadcast(exchange_name, msg)
            return True
        except pika.exceptions.ConnectionClosed as conxex:
            self.logerror('Error broadcasting to {0} {1}'.format(exchange_name, self.exceptionmessage(conxex)))
            return False

    def queuestatus(self):
        """TODO:print queue status"""
        pass
        #for q in self._queues.values():
        #    print(q.queue_name,str(q._connection))

    def putpool(self, pool: Pool):
        '''put pool in cache'''
        if pool and pool.name:
            valu = self.serialize(pool)
            self.tryputcache('pool.{0}'.format(pool.name), valu)

    def putminer(self, miner: Miner):
        '''put miner in cache'''
        if miner and miner.key():
            valu = self.serialize(miner)
            self.tryputcache('miner.{0}'.format(miner.key()), valu)

    def getminer(self, miner: Miner) -> Miner:
        '''strategies for getting miner from cache
        originally was key=miner.name but that was not good
        changed to key='miner.'+minerid
        '''
        valu = self.trygetvaluefromcache('miner.{0}'.format(miner.key()))
        if valu is None:
            return None
        minerfromstore = self.deserialize(MinerSchema(), self.safestring(valu))
        if not minerfromstore.key():
            #do not allow entry with no key
            return None
        minerfromstore.store = 'mem'
        return minerfromstore

    def getknownminer(self, miner: Miner) -> Miner:
        '''get a known miner'''
        return self.getknownminerbykey(miner.key())

    def getminerbyname(self, minername):
        filtered = [x for x in self.miners() if x.name == minername]
        if filtered: return filtered[0]
        return None

    def getknownminerbykey(self, minername):
        str_miner = self.__cache.getfromhashset(CacheKeys.knownminers, minername)
        if str_miner is None:
            return None
        return self.deserialize(MinerSchema(), self.safestring(str_miner))

    def getknownminerbyname(self, minername):
        '''this could be slow if there are lots of miners'''
        known = self.knownminers()
        for miner in known:
            if miner.name == minername:
                return miner
        return None

    def tryputcache(self, key, value):
        '''put value in cache key'''
        if value is None: return
        try:
            if self.__cache is not None:
                self.__cache.set(key, value)
        except redis.exceptions.ConnectionError as ex:

            self.logexception(ex)

    def putminerandstats(self, miner: Miner, minerstats, minerpool):
        '''put miner and status in cache'''
        self.putminer(miner)
        schema = MinerStatsSchema()
        valstats = schema.dumps(minerstats).data
        self.tryputcache(miner.key() + '.stats', valstats)
        schema = MinerCurrentPoolSchema()
        valpool = schema.dumps(minerpool).data
        self.tryputcache(miner.key() + '.pool', valpool)

    def trygetvaluefromcache(self, key):
        '''get value from cache'''
        if self.__cache is not None:
            try:
                return self.__cache.get(key)
            except Exception as ex:
                self.logexception(ex)
        return None

    def getstats(self, miner: Miner):
        '''get stats entity'''
        valu = self.trygetvaluefromcache(miner.name + '.stats')
        if valu is None: return None
        entity = MinerStatistics(miner, **self.deserialize(MinerStatsSchema(), valu))
        return entity

    def safestring(self, thestring):
        '''safely convert anything into string'''
        if thestring is None: return None
        if isinstance(thestring, str): return thestring
        return str(thestring, "utf-8")

    def getminerstatscached(self):
        '''iterator for cached stats'''
        for miner in self.miners():
            yield (self.getminer(miner), self.getstats(miner), self.getpool(miner))

    def messagedecodeminer(self, body) -> Miner:
        '''deserialize a miner message'''
        message_envelope = self.deserializemessageenvelope(self.safestring(body))
        schema = MinerMessageSchema()
        minermessage_dict = schema.load(message_envelope.bodyjson()).data
        minermessage_entity = schema.make_minermessage(minermessage_dict)
        miner = minermessage_entity.miner
        return miner

    def messagedecodeminerstats(self, body):
        '''deserialize miner stats'''
        message_envelope = self.deserializemessageenvelope(self.safestring(body))
        schema = MinerMessageSchema()
        minermessage_dict = schema.load(message_envelope.bodyjson()).data
        minermessage_entity = schema.make_minermessage(minermessage_dict)
        return minermessage_entity

    def messagedecodeminercommand(self, body):
        '''deserialize  miner command'''
        message_envelope = self.deserializemessageenvelope(self.safestring(body))
        schema = MinerMessageSchema()
        minermessage_dict = schema.load(message_envelope.bodyjson()).data
        minermessage_entity = schema.make_minermessage(minermessage_dict)
        return minermessage_entity

    def messagedecodesensor(self, body):
        '''deserialize sensor value '''
        message_envelope = self.deserializemessageenvelope(self.safestring(body))
        schema = SensorValueSchema()
        #minermessage_dict = schema.load(message_envelope.bodyjson()).data
        entity = schema.load(message_envelope.bodyjson()).data
        return message_envelope, entity

    def messagedecode_configuration(self, body):
        '''deserialize  configuration command'''
        message_envelope = self.deserializemessageenvelope(self.safestring(body))
        schema = ConfigurationMessageSchema()
        configurationmessage_dict = schema.load(message_envelope.bodyjson()).data
        configurationmessage_entity = schema.make_configurationmessage(configurationmessage_dict)
        return configurationmessage_entity

    def createmessageenvelope(self):
        '''create message envelope'''
        return Message(timestamp=datetime.datetime.utcnow(), sender=self.component)

    def serializemessageenvelope(self, msg):
        '''serialize message envelope'''
        return self._schemamsg.dumps(msg).data

    def jsonserialize(self, sch, msg):
        '''serialize a message with schema. returns string'''
        smessage = sch.dumps(msg)
        #json.dumps(jmessage)
        return smessage.data

    def serialize(self, entity):
        '''serialize any entity
        only need schema, message class not needed
        '''
        if isinstance(entity, Miner):
            schema = MinerSchema()
            return schema.dumps(entity).data

        if isinstance(entity, Pool):
            schema = PoolSchema()
            return schema.dumps(entity).data
        return None

    def serializelist(self, listofentities):
        '''serialize a list of entities'''
        json_list = json.dumps([e.__dict__ for e in listofentities])
        return json_list

    def deserializelistofstrings(self, the_list):
        '''deserialize list of strings into list of miners'''
        results = []
        for item in the_list:
            miner = self.deserialize(MinerSchema(), self.safestring(item))
            results.append(miner)
        return results

    def deserializelist_withschema(self, schema, the_list):
        '''deserialize list of strings into entities'''
        results = []
        for item in the_list:
            entity = self.deserialize(schema, self.safestring(item))
            #todo:for pools the entry is a list
            results.append(entity)
        return results

    def deserialize(self, sch, msg):
        '''Output should be entity, not python json object
        msg parameter should be string
        '''
        if msg is None: return None
        return sch.loads(msg).data

    def deserializemessageenvelope(self, body):
        '''serialize message envelope'''
        return self._schemamsg.load(json.loads(self.safestring(body))).data

    def createmessagestats(self, miner, minerstats, minerpool):
        #always save the miner so the next guy can get latest changes
        #only put in cache if it came from cache
        if miner.store == 'mem':
            self.putminer(miner)
        message = self.createmessageenvelope()
        message = message.make_minerstats(miner, minerstats, minerpool)
        return self.serializemessageenvelope(message)

    def createmessagecommand(self, miner, command):
        '''create message command'''
        if miner.store == 'mem':
            self.putminer(miner)
        message = self.createmessageenvelope()
        message = message.make_minercommand(miner, command)
        return self.serializemessageenvelope(message)

    def messageencode(self, miner: Miner):
        '''command is optional, however should convert this call into minercommand'''
        #always save the miner so the next guy can get latest changes
        if miner.store == 'mem':
            self.putminer(miner)
        message = self.createmessageenvelope()
        message = message.make_minerstats(miner, minerstats=None, minerpool=None)
        return self._schemamsg.dumps(message).data

    def stamp(self, message):
        return '{0}:{1}: {2}'.format(self.now(), self.applicationid, message)

    def alert(self, message):
        '''send alert message'''
        return self.sendqueueitem(QueueEntry(QueueName.Q_ALERT, self.stamp(message), QueueType.broadcast))

    def send(self, q_name, message):
        '''send message to queue'''
        success = self.trypublish(q_name, message)
        return success

    def enqueue(self, queuelist):
        '''send a list of queue messages'''
        if queuelist is None:
            return
        if not queuelist.hasentries():
            return
        #todo: group by queuename
        for entry in queuelist.entries:
            self.sendqueueitem(entry)

    def sendqueueitem(self, entry):
        '''send one queue item'''
        if entry.eventtype == 'broadcast':
            send_result = self.trybroadcast(entry.queuename, entry.message)
            return send_result
        return self.send(entry.queuename, entry.message)

    def take_picture(self, file_name='fullcycle_camera.png'):
        pic = take_picture(file_name,
                           self.configuration('camera.size'),
                           self.configuration('camera.quality'),
                           self.configuration('camera.brightness'),
                           self.configuration('camera.contrast'))
        return pic

    def store_picture_cache(self, file_name):
        if os.path.isfile(file_name):
            with open(file_name, 'rb') as photofile:
                picdata = photofile.read()
            reading = SensorValue('fullcyclecamera', base64.b64encode(picdata), 'camera')
            #reading.sensor = self.sensor
            #self.sendsensor(reading)
            message = self.createmessageenvelope()
            sensorjson = message.jsonserialize(SensorValueSchema(), reading)
            self.tryputcache(CacheKeys.camera, sensorjson)

    def readtemperature(self):
        try:
            sensor_humid, sensor_temp = readtemperature()
            if sensor_temp is not None:
                reading = SensorValue('fullcycletemp', sensor_temp, 'temperature')
                reading.sensor = self.sensor
                self.sendsensor(reading)
            if sensor_humid is not None:
                reading = SensorValue('fullcyclehumid', sensor_humid, 'humidity')
                reading.sensor = self.sensor
                self.sendsensor(reading)
            return sensor_humid, sensor_temp
        except BaseException as ex:
            self.logexception(ex)
        return None, None

    def sendsensor(self, reading):
        message = self.createmessageenvelope()
        sensorjson = message.jsonserialize(SensorValueSchema(), reading)
        self.sendqueueitem(QueueEntry(QueueName.Q_SENSOR, self.serializemessageenvelope(message.make_any('sensorvalue', sensorjson)), QueueType.broadcast))

    def sendtelegrammessage(self, message):
        if self.is_enabled_configuration('telegram'):
            sendalert(message, self.getservice('telegram'))

    def sendtelegramphoto(self, file_name):
        if os.path.isfile(file_name) and os.path.getsize(file_name) > 0:
            if self.is_enabled_configuration('telegram'):
                sendphoto(file_name, self.getservice('telegram'))

    def getsession(self):
        service = self.getservice(ServiceName.database)
        engine = create_engine(service.connection, echo=False)
        Session = sessionmaker(bind=engine)
        return Session()

    def log_mineractivity(self, minerlog):
        try:
            session = self.getsession()
            session.add(minerlog)
            session.commit()
            return True
        except BaseException as ex:
            self.logexception(ex)
        return False

    def save_miner(self, miner: Miner):
        found = self.getknownminer(miner)
        if found is None:
            self.addknownminer(miner)
            #miners = MinerRepository()
            #todo:add the miner to the json config
        else:
            found.updatefrom(miner)
            self.putminer(found)

    def save_pool(self, pool: Pool):
        sch = PoolSchema()
        pools = PoolRepository()
        pools.add(pool, self.getconfigfilename('config/pools.conf'), sch)

        #update the known pools
        for known in self.knownpools():
            if pool.is_same_as(known):
                oldkey = known.key
                known.named_pool = pool
                #this changes the pool key!
                known.user = pool.user
                #update the known pool (with new key)
                self.update_pool(oldkey, known)

def main():
    full_cycle = ApplicationService()
    full_cycle.loginfo('Full Cycle was run in a script')
    full_cycle.shutdown()

if __name__ == "__main__":
    main()

dfoderick / fullcycle

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backend.fcmapp.Cache.hdel() A

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