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vertx starter project for spring boot

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/*
 * Copyright (C) 2016~2018 dinstone
 *
 * 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.dinstone.vertx.starter.config;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import io.vertx.core.Vertx;
import io.vertx.core.VertxOptions;

@Configuration
@ConditionalOnBean(VertxConfiguration.Marker.class)
@EnableConfigurationProperties(VertxProperties.class)
public class VertxAutoConfiguration {

    @Autowired
    private ApplicationContext applicationContext;

    @Autowired
    private VertxProperties vertxProperties;

    private Vertx vertx;

    @PostConstruct
    public void init() {
        VertxOptions vertxOptions = null;
        try {
            vertxOptions = applicationContext.getBean(VertxOptions.class);
        } catch (Exception e) {
            // ignore
        }

        if (vertxOptions == null) {
            vertxOptions = loadVertxOptions();
        }
        vertx = Vertx.vertx(vertxOptions);
    }

    private VertxOptions loadVertxOptions() {
        VertxOptions vertxOptions = new VertxOptions();
        int blockedCheckInterval = vertxProperties.getBlockedThreadCheckInterval();
        if (blockedCheckInterval > 0) {
            vertxOptions.setBlockedThreadCheckInterval(blockedCheckInterval);
        }

        if (vertxProperties.getEventLoopPoolSize() > 0) {
            vertxOptions.setEventLoopPoolSize(vertxProperties.getEventLoopPoolSize());
        }

        if (vertxProperties.getWorkerPoolSize() > 0) {
            vertxOptions.setWorkerPoolSize(vertxProperties.getWorkerPoolSize());
        }

        return vertxOptions;
    }

    @PreDestroy
    public void destory() {
        if (vertx != null) {
            vertx.close();
        }
    }

    @Bean
    public Vertx vertx() {
        return vertx;
    }
}