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223 lines
8.4 KiB
Python
223 lines
8.4 KiB
Python
import io
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import logging
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import networkx as nx
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import os
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import threading
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import tornado.ioloop
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import tornado.web
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import tornado.websocket
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import tornado.escape
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import tornado.gen
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import yaml
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import webbrowser
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from contextlib import contextmanager
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from time import sleep
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from xml.etree.ElementTree import tostring
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logger = logging.getLogger(__name__)
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logger.setLevel(logging.INFO)
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class PageHandler(tornado.web.RequestHandler):
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""" Handler for the HTML template which holds the visualization. """
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def get(self):
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self.render('index.html', port=self.application.port,
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name=self.application.name)
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class SocketHandler(tornado.websocket.WebSocketHandler):
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""" Handler for websocket. """
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def open(self):
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if self.application.verbose:
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logger.info('Socket opened!')
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def check_origin(self, origin):
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return True
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def on_message(self, message):
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""" Receiving a message from the websocket, parse, and act accordingly. """
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msg = tornado.escape.json_decode(message)
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if msg['type'] == 'config_file':
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if self.application.verbose:
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print(msg['data'])
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self.config = list(yaml.load_all(msg['data']))
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if len(self.config) > 1:
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error = 'Please, provide only one configuration.'
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if self.application.verbose:
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logger.error(error)
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self.write_message({'type': 'error',
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'error': error})
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return
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else:
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self.config = self.config[0]
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self.send_log('INFO.' + self.application.simulator.name, 'Using config: {name}'.format(name=self.config['name']))
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if 'visualization_params' in self.config:
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self.write_message({'type': 'visualization_params',
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'data': self.config['visualization_params']})
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self.name = self.config['name']
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self.run_simulation()
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settings = []
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for key in self.config['environment_params']:
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if type(self.config['environment_params'][key]) == float or type(self.config['environment_params'][key]) == int:
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if self.config['environment_params'][key] <= 1:
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setting_type = 'number'
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else:
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setting_type = 'great_number'
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elif type(self.config['environment_params'][key]) == bool:
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setting_type = 'boolean'
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else:
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setting_type = 'undefined'
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settings.append({
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'label': key,
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'type': setting_type,
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'value': self.config['environment_params'][key]
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})
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self.write_message({'type': 'settings',
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'data': settings})
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elif msg['type'] == 'get_trial':
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if self.application.verbose:
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logger.info('Trial {} requested!'.format(msg['data']))
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self.send_log('INFO.' + __name__, 'Trial {} requested!'.format(msg['data']))
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self.write_message({'type': 'get_trial',
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'data': self.get_trial( int(msg['data']) ) })
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elif msg['type'] == 'run_simulation':
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if self.application.verbose:
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logger.info('Running new simulation for {name}'.format(name=self.config['name']))
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self.send_log('INFO.' + self.application.simulator.name, 'Running new simulation for {name}'.format(name=self.config['name']))
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self.config['environment_params'] = msg['data']
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self.run_simulation()
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elif msg['type'] == 'download_gexf':
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G = self.simulation[ int(msg['data']) ].history_to_graph()
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for node in G.nodes():
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if 'pos' in G.node[node]:
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G.node[node]['viz'] = {"position": {"x": G.node[node]['pos'][0], "y": G.node[node]['pos'][1], "z": 0.0}}
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del (G.node[node]['pos'])
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writer = nx.readwrite.gexf.GEXFWriter(version='1.2draft')
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writer.add_graph(G)
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self.write_message({'type': 'download_gexf',
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'filename': self.config['name'] + '_trial_' + str(msg['data']),
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'data': tostring(writer.xml).decode(writer.encoding) })
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elif msg['type'] == 'download_json':
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G = self.simulation[ int(msg['data']) ].history_to_graph()
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for node in G.nodes():
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if 'pos' in G.node[node]:
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G.node[node]['viz'] = {"position": {"x": G.node[node]['pos'][0], "y": G.node[node]['pos'][1], "z": 0.0}}
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del (G.node[node]['pos'])
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self.write_message({'type': 'download_json',
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'filename': self.config['name'] + '_trial_' + str(msg['data']),
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'data': nx.node_link_data(G) })
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else:
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if self.application.verbose:
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logger.info('Unexpected message!')
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def update_logging(self):
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try:
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if (not self.log_capture_string.closed and self.log_capture_string.getvalue()):
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for i in range(len(self.log_capture_string.getvalue().split('\n')) - 1):
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self.send_log('INFO.' + self.application.simulator.name, self.log_capture_string.getvalue().split('\n')[i])
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self.log_capture_string.truncate(0)
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self.log_capture_string.seek(0)
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finally:
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if self.capture_logging:
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thread = threading.Timer(0.01, self.update_logging)
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thread.start()
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def on_close(self):
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if self.application.verbose:
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logger.info('Socket closed!')
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def send_log(self, logger, logging):
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self.write_message({'type': 'log',
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'logger': logger,
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'logging': logging })
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def run_simulation(self):
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# Run simulation and capture logs
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if 'visualization_params' in self.config:
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del self.config['visualization_params']
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with self.logging(self.application.simulator.name):
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try:
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self.simulation = self.application.simulator.run(self.config)
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trials = []
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for i in range(self.config['num_trials']):
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trials.append('{}_trial_{}'.format(self.name, i))
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self.write_message({'type': 'trials',
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'data': trials })
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except:
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error = 'Something went wrong. Please, try again.'
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self.write_message({'type': 'error',
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'error': error})
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self.send_log('ERROR.' + self.application.simulator.name, error)
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def get_trial(self, trial):
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G = self.simulation[trial].history_to_graph()
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return nx.node_link_data(G)
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@contextmanager
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def logging(self, logger):
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self.capture_logging = True
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self.logger_application = logging.getLogger(logger)
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self.log_capture_string = io.StringIO()
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ch = logging.StreamHandler(self.log_capture_string)
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self.logger_application.addHandler(ch)
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self.update_logging()
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yield self.capture_logging
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sleep(0.2)
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self.log_capture_string.close()
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self.logger_application.removeHandler(ch)
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self.capture_logging = False
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return self.capture_logging
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class ModularServer(tornado.web.Application):
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""" Main visualization application. """
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port = 8001
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page_handler = (r'/', PageHandler)
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socket_handler = (r'/ws', SocketHandler)
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static_handler = (r'/(.*)', tornado.web.StaticFileHandler,
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{'path': 'templates'})
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local_handler = (r'/local/(.*)', tornado.web.StaticFileHandler,
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{'path': ''})
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handlers = [page_handler, socket_handler, static_handler, local_handler]
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settings = {'debug': True,
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'template_path': os.path.dirname(__file__) + '/templates'}
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def __init__(self, simulator, name='SOIL', verbose=True, *args, **kwargs):
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self.verbose = verbose
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self.name = name
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self.simulator = simulator
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# Initializing the application itself:
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super().__init__(self.handlers, **self.settings)
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def launch(self, port=None):
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""" Run the app. """
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if port is not None:
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self.port = port
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url = 'http://127.0.0.1:{PORT}'.format(PORT=self.port)
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print('Interface starting at {url}'.format(url=url))
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self.listen(self.port)
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# webbrowser.open(url)
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tornado.ioloop.IOLoop.instance().start()
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