| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.unomi.persistence.elasticsearch.conditions; |
| |
| import org.apache.unomi.api.Item; |
| import org.apache.unomi.api.conditions.Condition; |
| import org.apache.unomi.metrics.MetricAdapter; |
| import org.apache.unomi.metrics.MetricsService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| /** |
| * Entry point for condition evaluation. Will dispatch to all evaluators. |
| */ |
| public class ConditionEvaluatorDispatcher { |
| private static final Logger logger = LoggerFactory.getLogger(ConditionEvaluatorDispatcher.class.getName()); |
| |
| private Map<String, ConditionEvaluator> evaluators = new ConcurrentHashMap<>(); |
| |
| private MetricsService metricsService; |
| |
| public void setMetricsService(MetricsService metricsService) { |
| this.metricsService = metricsService; |
| } |
| |
| public void addEvaluator(String name, ConditionEvaluator evaluator) { |
| evaluators.put(name, evaluator); |
| } |
| |
| public void removeEvaluator(String name) { |
| evaluators.remove(name); |
| } |
| |
| public boolean eval(Condition condition, Item item) { |
| return eval(condition, item, new HashMap<String, Object>()); |
| } |
| |
| public boolean eval(Condition condition, Item item, Map<String, Object> context) { |
| String conditionEvaluatorKey = condition.getConditionType().getConditionEvaluator(); |
| if (condition.getConditionType().getParentCondition() != null) { |
| context.putAll(condition.getParameterValues()); |
| return eval(condition.getConditionType().getParentCondition(), item, context); |
| } |
| |
| if (conditionEvaluatorKey == null) { |
| throw new UnsupportedOperationException("No evaluator defined for : " + condition.getConditionTypeId()); |
| } |
| |
| if (evaluators.containsKey(conditionEvaluatorKey)) { |
| ConditionEvaluator evaluator = evaluators.get(conditionEvaluatorKey); |
| final ConditionEvaluatorDispatcher dispatcher = this; |
| try { |
| return new MetricAdapter<Boolean>(metricsService, this.getClass().getName() + ".conditions." + conditionEvaluatorKey) { |
| @Override |
| public Boolean execute(Object... args) throws Exception { |
| Condition contextualCondition = ConditionContextHelper.getContextualCondition(condition, context); |
| if (contextualCondition != null) { |
| return evaluator.eval(contextualCondition, item, context, dispatcher); |
| } else { |
| return true; |
| } |
| } |
| }.runWithTimer(); |
| } catch (Exception e) { |
| logger.error("Error executing condition evaluator with key=" + conditionEvaluatorKey, e); |
| } |
| } |
| |
| // if no matching |
| return false; |
| } |
| } |