org.apache.james.backend.rabbitmq.RabbitMQConnectionFactory.java Source code

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Here is the source code for org.apache.james.backend.rabbitmq.RabbitMQConnectionFactory.java

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package org.apache.james.backend.rabbitmq;

import java.util.concurrent.ExecutionException;

import javax.inject.Inject;

import org.apache.james.util.retry.RetryExecutorUtil;

import com.nurkiewicz.asyncretry.AsyncRetryExecutor;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

public class RabbitMQConnectionFactory {

    private final AsyncRetryExecutor executor;
    private final ConnectionFactory connectionFactory;

    private final int maxRetries;
    private final int minDelay;

    @Inject
    public RabbitMQConnectionFactory(RabbitMQConfiguration rabbitMQConfiguration, AsyncRetryExecutor executor) {
        this.executor = executor;
        this.connectionFactory = from(rabbitMQConfiguration);
        this.maxRetries = rabbitMQConfiguration.getMaxRetries();
        this.minDelay = rabbitMQConfiguration.getMinDelay();
    }

    private ConnectionFactory from(RabbitMQConfiguration rabbitMQConfiguration) {
        try {
            ConnectionFactory connectionFactory = new ConnectionFactory();
            connectionFactory.setUri(rabbitMQConfiguration.getUri());
            connectionFactory.useNio();
            return connectionFactory;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public Connection create() {
        try {
            return RetryExecutorUtil.retryOnExceptions(executor, maxRetries, minDelay, Exception.class)
                    .getWithRetry(context -> connectionFactory.newConnection()).get();
        } catch (InterruptedException | ExecutionException e) {
            throw new RuntimeException(e);
        }
    }
}