io.micronaut.configuration.rabbitmq.connect.RabbitConnectionFactory Maven / Gradle / Ivy

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/*
 * Copyright 2017-2018 original 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 io.micronaut.configuration.rabbitmq.connect;

import com.rabbitmq.client.Address;
import com.rabbitmq.client.Connection;
import io.micronaut.context.BeanContext;
import io.micronaut.context.annotation.Bean;
import io.micronaut.context.annotation.EachBean;
import io.micronaut.context.annotation.Factory;
import io.micronaut.context.exceptions.BeanInstantiationException;
import io.micronaut.inject.qualifiers.Qualifiers;

import javax.inject.Singleton;
import java.io.IOException;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeoutException;

/**
 * A factory for creating a connection to RabbitMQ.
 *
 * @author James Kleeh
 * @since 1.1.0
 */
@Factory
public class RabbitConnectionFactory {

    /**
     * @param connectionFactory The factory to create the connection
     * @param beanContext The bean context to dynamically retrieve the executor service
     * @return The connection
     */
    @Bean(preDestroy = "close")
    @Singleton
    @EachBean(RabbitConnectionFactoryConfig.class)
    Connection connection(RabbitConnectionFactoryConfig connectionFactory,
                          BeanContext beanContext) {
        try {
            ExecutorService executorService = beanContext.getBean(ExecutorService.class, Qualifiers.byName(connectionFactory.getConsumerExecutor()));
            Optional> addresses = connectionFactory.getAddresses();
            if (addresses.isPresent()) {
                return connectionFactory.newConnection(executorService, addresses.get());
            } else {
                return connectionFactory.newConnection(executorService);
            }
        } catch (IOException | TimeoutException e) {
            throw new BeanInstantiationException("Error creating connection to RabbitMQ", e);
        }
    }
}