com.precioustech.fxtrading.tradingbot.spring.FindEventBusSubscribers.java Source code

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Here is the source code for com.precioustech.fxtrading.tradingbot.spring.FindEventBusSubscribers.java

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/*
 *  Copyright 2015 Shekhar Varshney
 *
 *  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 com.precioustech.fxtrading.tradingbot.spring;

import java.lang.reflect.Method;

import org.apache.log4j.Logger;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.BeanPostProcessor;

import com.google.common.eventbus.EventBus;
import com.google.common.eventbus.Subscribe;

public class FindEventBusSubscribers implements BeanPostProcessor {

    @Autowired
    private EventBus eventBus;
    private static final Logger LOG = Logger.getLogger(FindEventBusSubscribers.class);

    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        return bean;
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        Method[] beanMethods = bean.getClass().getMethods();
        for (Method beanMethod : beanMethods) {
            if (beanMethod.isAnnotationPresent(Subscribe.class)) {
                eventBus.register(bean);
                LOG.info(String.format("Found event bus subscriber class %s. Subscriber method name=%s",
                        bean.getClass().getSimpleName(), beanMethod.getName()));
                break;
            }
        }
        return bean;
    }

}