org.cometd.annotation.spring.Configurator.java Source code

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Here is the source code for org.cometd.annotation.spring.Configurator.java

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/*
 * Copyright (c) 2008-2014 the original author or authors.
 *
 * Licensed 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.cometd.annotation.spring;

import javax.annotation.PostConstruct;
import javax.inject.Inject;

import org.cometd.annotation.ServerAnnotationProcessor;
import org.cometd.bayeux.server.BayeuxServer;
import org.cometd.server.BayeuxServerImpl;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.DestructionAwareBeanPostProcessor;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

/**
 * The Spring component that configures CometD services.
 *
 * Spring scans the classes and finds this class annotated with Spring's @Component
 * annotation, and makes an instance. Then it notices that it has a bean factory
 * method (annotated with @Bean) that produces the BayeuxServer instance.
 * Note that, as per Spring documentation, this class is subclassed by Spring
 * via CGLIB to invoke bean factory methods only once.
 *
 * Implementing {@link DestructionAwareBeanPostProcessor} allows to plug-in
 * CometD's annotation processor to process the CometD services.
 */
@Component
public class Configurator implements DestructionAwareBeanPostProcessor {
    private BayeuxServer bayeuxServer;
    private ServerAnnotationProcessor processor;

    @Inject
    private void setBayeuxServer(BayeuxServer bayeuxServer) {
        this.bayeuxServer = bayeuxServer;
    }

    @PostConstruct
    private void init() {
        this.processor = new ServerAnnotationProcessor(bayeuxServer);
    }

    public Object postProcessBeforeInitialization(Object bean, String name) throws BeansException {
        processor.processDependencies(bean);
        processor.processConfigurations(bean);
        processor.processCallbacks(bean);
        return bean;
    }

    public Object postProcessAfterInitialization(Object bean, String name) throws BeansException {
        return bean;
    }

    public void postProcessBeforeDestruction(Object bean, String name) throws BeansException {
        processor.deprocessCallbacks(bean);
    }

    @Bean(initMethod = "start", destroyMethod = "stop")
    public BayeuxServer bayeuxServer() {
        return new BayeuxServerImpl();
    }
}