io.bitsensor.plugins.shaded.com.rabbitmq.client.impl.recovery.RecoveryAwareAMQConnectionFactory Maven / Gradle / Ivy

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// Copyright (c) 2007-Present Pivotal Software, Inc.  All rights reserved.
//
// This software, the RabbitMQ Java client library, is triple-licensed under the
// Mozilla Public License 1.1 ("MPL"), the GNU General Public License version 2
// ("GPL") and the Apache License version 2 ("ASL"). For the MPL, please see
// LICENSE-MPL-RabbitMQ. For the GPL, please see LICENSE-GPL2.  For the ASL,
// please see LICENSE-APACHE2.
//
// This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND,
// either express or implied. See the LICENSE file for specific language governing
// rights and limitations of this software.
//
// If you have any questions regarding licensing, please contact us at
// [email protected].

package io.bitsensor.plugins.shaded.com.rabbitmq.client.impl.recovery;

import io.bitsensor.plugins.shaded.com.rabbitmq.client.*;
import io.bitsensor.plugins.shaded.com.rabbitmq.client.impl.ConnectionParams;
import io.bitsensor.plugins.shaded.com.rabbitmq.client.impl.FrameHandler;
import io.bitsensor.plugins.shaded.com.rabbitmq.client.impl.FrameHandlerFactory;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.TimeoutException;

public class RecoveryAwareAMQConnectionFactory {
    private final ConnectionParams params;
    private final FrameHandlerFactory factory;
    private final AddressResolver addressResolver;
    private final MetricsCollector metricsCollector;

    public RecoveryAwareAMQConnectionFactory(ConnectionParams params, FrameHandlerFactory factory, List addrs) {
        this(params, factory, new ListAddressResolver(addrs), new NoOpMetricsCollector());
    }

    public RecoveryAwareAMQConnectionFactory(ConnectionParams params, FrameHandlerFactory factory, AddressResolver addressResolver) {
        this(params, factory, addressResolver, new NoOpMetricsCollector());
    }

    public RecoveryAwareAMQConnectionFactory(ConnectionParams params, FrameHandlerFactory factory, AddressResolver addressResolver, MetricsCollector metricsCollector) {
        this.params = params;
        this.factory = factory;
        this.addressResolver = addressResolver;
        this.metricsCollector = metricsCollector;
    }

    /**
     * @return an interface to the connection
     * @throws java.io.IOException if it encounters a problem
     */
    RecoveryAwareAMQConnection newConnection() throws IOException, TimeoutException {
        IOException lastException = null;
        List shuffled = shuffle(addressResolver.getAddresses());

        for (Address addr : shuffled) {
            try {
                FrameHandler frameHandler = factory.create(addr);
                RecoveryAwareAMQConnection conn = new RecoveryAwareAMQConnection(params, frameHandler, metricsCollector);
                conn.start();
                metricsCollector.newConnection(conn);
                return conn;
            } catch (IOException e) {
                lastException = e;
            }
        }

        throw (lastException != null) ? lastException : new IOException("failed to connect");
    }

    private static List shuffle(List addrs) {
        List list = new ArrayList(addrs);
        Collections.shuffle(list);
        return list;
    }
}