com.tesora.dve.parlb.LoadBalancerProxyInitializer.java Source code

Introduction

Here is the source code for com.tesora.dve.parlb.LoadBalancerProxyInitializer.java

Source

package com.tesora.dve.parlb;

/*
 * #%L
 * Tesora Inc.
 * Database Virtualization Engine
 * %%
 * Copyright (C) 2011 - 2014 Tesora Inc.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import io.netty.channel.ChannelInitializer;
import io.netty.channel.socket.SocketChannel;

import java.net.InetSocketAddress;
import java.util.Properties;

import org.apache.log4j.Logger;

import com.tesora.dve.common.PECollectionUtils;
import com.tesora.dve.common.PEConstants;
import com.tesora.dve.exceptions.PEException;
import com.tesora.dve.hazelcast.HazelcastGroupClient;

public class LoadBalancerProxyInitializer extends ChannelInitializer<SocketChannel> {

    private static Logger logger = Logger.getLogger(LoadBalancerProxyInitializer.class);

    HazelcastGroupClient hazelcastClient;

    public LoadBalancerProxyInitializer(Properties props) throws Exception {
        this.hazelcastClient = new HazelcastGroupClient();
        hazelcastClient.startHazelcastClient(props);
    }

    public void close() {
        hazelcastClient.stopHazelcastClient();
    }

    @Override
    public void initChannel(SocketChannel ch) throws Exception {
        if (hazelcastClient.isConnected()) {
            InetSocketAddress selectedMember = PECollectionUtils.selectRandom(hazelcastClient.getMembers());
            InetSocketAddress selectedPEServer = hazelcastClient.getPEServerAddress(selectedMember);
            logger.debug("Selected PE server: " + selectedPEServer);
            ch.pipeline().addLast(
                    // new LoggingHandler(LogLevel.INFO),
                    new MysqlClientHandler(selectedPEServer));
        } else {
            throw new PEException("Not connected to DVE server group.");
        }
    }

    public int getDefaultPort() {
        return PEConstants.MYSQL_PORT;
    }
}