| /** |
| * 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.spring.javaconfig; |
| |
| import java.lang.reflect.Modifier; |
| |
| import org.apache.camel.CamelContext; |
| import org.apache.camel.RoutesBuilder; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.context.ApplicationContext; |
| import org.springframework.context.ApplicationListener; |
| import org.springframework.context.event.ContextRefreshedEvent; |
| import org.springframework.core.Ordered; |
| |
| /** |
| * Collects routes and rests from the various sources (like Spring application context beans registry or opinionated |
| * classpath locations) and injects these into the Camel context. |
| */ |
| public class RoutesCollector implements ApplicationListener<ContextRefreshedEvent>, Ordered { |
| |
| // Static collaborators |
| |
| private static final Logger LOG = LoggerFactory.getLogger(RoutesCollector.class); |
| |
| // Collaborators |
| |
| private final ApplicationContext applicationContext; |
| private final CamelConfiguration configuration; |
| |
| // Constructors |
| |
| public RoutesCollector(ApplicationContext applicationContext, CamelConfiguration configuration) { |
| this.applicationContext = applicationContext; |
| this.configuration = configuration; |
| } |
| |
| // Overridden |
| |
| @Override |
| public void onApplicationEvent(ContextRefreshedEvent event) { |
| ApplicationContext applicationContext = event.getApplicationContext(); |
| |
| // only listen to context refresh of "my" applicationContext |
| if (this.applicationContext.equals(applicationContext)) { |
| |
| CamelContext camelContext = event.getApplicationContext().getBean(CamelContext.class); |
| |
| // only add and start Camel if its stopped (initial state) |
| if (camelContext.getStatus().isStopped()) { |
| LOG.debug("Post-processing CamelContext bean: {}", camelContext.getName()); |
| for (RoutesBuilder routesBuilder : configuration.routes()) { |
| // filter out abstract classes |
| boolean abs = Modifier.isAbstract(routesBuilder.getClass().getModifiers()); |
| if (!abs) { |
| try { |
| LOG.debug("Injecting following route into the CamelContext: {}", routesBuilder); |
| camelContext.addRoutes(routesBuilder); |
| } catch (Exception e) { |
| throw new CamelSpringJavaconfigInitializationException(e); |
| } |
| } |
| } |
| |
| try { |
| boolean skip = "true".equalsIgnoreCase(System.getProperty("skipStartingCamelContext")); |
| if (skip) { |
| LOG.info("Skipping starting CamelContext(s) as system property skipStartingCamelContext is set to be true."); |
| } else { |
| // start camel |
| camelContext.start(); |
| } |
| |
| } catch (Exception e) { |
| throw new CamelSpringJavaconfigInitializationException(e); |
| } |
| |
| } |
| } else { |
| LOG.debug("Ignore ContextRefreshedEvent: {}", event); |
| } |
| } |
| |
| @Override |
| public int getOrder() { |
| // we want the RoutesCollector to receive ContextRefreshedEvent |
| // before SpringCamelContext (see SpringCamelContext::getOrder) |
| return LOWEST_PRECEDENCE - 1; |
| } |
| |
| } |