| /** |
| * 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.camel.component.optaplanner; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Processor; |
| import org.apache.camel.impl.DefaultConsumer; |
| import org.optaplanner.core.api.solver.Solver; |
| import org.optaplanner.core.api.solver.event.BestSolutionChangedEvent; |
| import org.optaplanner.core.api.solver.event.SolverEventListener; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * OptaPlanner component for Camel |
| */ |
| public class OptaPlannerConsumer extends DefaultConsumer { |
| private static final transient Logger LOGGER = LoggerFactory.getLogger(OptaPlannerConsumer.class); |
| private final OptaPlannerEndpoint endpoint; |
| private final OptaPlannerConfiguration configuration; |
| private final SolverEventListener<Object> listener; |
| |
| public OptaPlannerConsumer(OptaPlannerEndpoint endpoint, Processor processor, OptaPlannerConfiguration configuration) { |
| super(endpoint, processor); |
| this.endpoint = endpoint; |
| this.configuration = configuration; |
| listener = new SolverEventListener<Object>() { |
| @Override |
| public void bestSolutionChanged(BestSolutionChangedEvent<Object> event) { |
| if (event.isEveryProblemFactChangeProcessed() && event.getNewBestScore().isSolutionInitialized()) { |
| processEvent(event); |
| } |
| } |
| }; |
| } |
| |
| public void processEvent(BestSolutionChangedEvent<Object> event) { |
| Exchange exchange = getEndpoint().createExchange(); |
| exchange.getOut().setHeader(OptaPlannerConstants.BEST_SOLUTION, event.getNewBestSolution()); |
| try { |
| getProcessor().process(exchange); |
| } catch (Exception e) { |
| LOGGER.error("Error processing event ", e); |
| } |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| Solver<Object> solver = endpoint.getOrCreateSolver(configuration.getSolverId()); |
| solver.addEventListener(listener); |
| super.doStart(); |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| Solver<Object> solver = endpoint.getOrCreateSolver(configuration.getSolverId()); |
| solver.removeEventListener(listener); |
| super.doStop(); |
| } |
| } |