import os.path from data_provider import DataProvider from data_preprocessor import data_preprocessor import json import pandas as pd import logging from urllib.parse import urlparse import config logger = logging.getLogger('analytic_toolset') def anomalies_to_timestamp(anomalies): for anomaly in anomalies: anomaly['start'] = int(anomaly['start'].timestamp() * 1000) anomaly['finish'] = int(anomaly['finish'].timestamp() * 1000) return anomalies class AnomalyModel: def __init__(self, anomaly_name): self.anomaly_name = anomaly_name self.load_anomaly_config() parsedUrl = urlparse(self.anomaly_config['panelUrl']) origin = parsedUrl.scheme + '://' + parsedUrl.netloc datasource = self.anomaly_config['datasource'] datasource['origin'] = origin metric_name = self.anomaly_config['metric']['targets'][0] target_filename = os.path.join(config.METRICS_FOLDER, metric_name + ".json") dataset_filename = os.path.join(config.DATASET_FOLDER, metric_name + ".csv") augmented_path = os.path.join(config.DATASET_FOLDER, metric_name + "_augmented.csv") with open(target_filename, 'r') as file: target = json.load(file) self.data_prov = DataProvider(datasource, target, dataset_filename) self.preprocessor = data_preprocessor(self.data_prov, augmented_path) self.model = None self.__load_model() def anomalies_box(self, anomalies): max_time = 0 min_time = float("inf") for anomaly in anomalies: max_time = max(max_time, anomaly['finish']) min_time = min(min_time, anomaly['start']) min_time = pd.to_datetime(min_time, unit='ms') max_time = pd.to_datetime(max_time, unit='ms') return min_time, max_time def learn(self, anomalies): logger.info("Start to learn for anomaly_name='%s'" % self.anomaly_name) confidence = 0.02 dataframe = self.data_prov.get_dataframe() start_index, stop_index = 0, len(dataframe) if len(anomalies) > 0: confidence = 0.0 min_time, max_time = self.anomalies_box(anomalies) dataframe = dataframe[dataframe['timestamp'] <= max_time] dataframe = dataframe[dataframe['timestamp'] >= min_time] train_augmented = self.preprocessor.get_augmented_data( dataframe.index[0], dataframe.index[-1], anomalies ) self.model = self.create_algorithm() self.model.fit(train_augmented, confidence) if len(anomalies) > 0: last_dataframe_time = dataframe.iloc[- 1]['timestamp'] last_prediction_time = int(last_dataframe_time.timestamp() * 1000) else: last_prediction_time = 0 self.__save_model() logger.info("Learning is finished for anomaly_name='%s'" % self.anomaly_name) return last_prediction_time def predict(self, last_prediction_time): logger.info("Start to predict for anomaly type='%s'" % self.anomaly_name) last_prediction_time = pd.to_datetime(last_prediction_time, unit='ms') start_index = self.data_prov.get_upper_bound(last_prediction_time) stop_index = self.data_prov.size() last_prediction_time = int(last_prediction_time.timestamp() * 1000) predicted_anomalies = [] if start_index < stop_index: max_chunk_size = 50000 predicted = pd.Series() for index in range(start_index, stop_index, max_chunk_size): chunk_start = index chunk_finish = min(index + max_chunk_size, stop_index) predict_augmented = self.preprocessor.get_augmented_data(chunk_start, chunk_finish) assert(len(predict_augmented) == chunk_finish - chunk_start) predicted_current = self.model.predict(predict_augmented) predicted = pd.concat([predicted, predicted_current]) predicted_anomalies = self.preprocessor.inverse_transform_anomalies(predicted) last_row = self.data_prov.get_data_range(stop_index - 1, stop_index) last_dataframe_time = last_row.iloc[0]['timestamp'] predicted_anomalies = anomalies_to_timestamp(predicted_anomalies) last_prediction_time = int(last_dataframe_time.timestamp() * 1000) logger.info("Predicting is finished for anomaly type='%s'" % self.anomaly_name) return predicted_anomalies, last_prediction_time def synchronize_data(self): self.data_prov.synchronize() self.preprocessor.set_data_provider(self.data_prov) self.preprocessor.synchronize() def load_anomaly_config(self): with open(os.path.join(config.ANOMALIES_FOLDER, self.anomaly_name + ".json"), 'r') as config_file: self.anomaly_config = json.load(config_file) def get_anomalies(self): labeled_anomalies_file = os.path.join(config.ANOMALIES_FOLDER, self.anomaly_name + "_labeled.json") if not os.path.exists(labeled_anomalies_file): return [] with open(labeled_anomalies_file) as file: return json.load(file) def create_algorithm(self): from supervised_algorithm import supervised_algorithm return supervised_algorithm() def __save_model(self): logger.info("Save model '%s'" % self.anomaly_name) model_filename = os.path.join(config.MODELS_FOLDER, self.anomaly_name + ".m") self.model.save(model_filename) def __load_model(self): logger.info("Load model '%s'" % self.anomaly_name) model_filename = os.path.join(config.MODELS_FOLDER, self.anomaly_name + ".m") if os.path.exists(model_filename): self.model = self.create_algorithm() self.model.load(model_filename)