com.chiralBehaviors.slp.hive.configuration.BroadcastConfiguration.java Source code

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Here is the source code for com.chiralBehaviors.slp.hive.configuration.BroadcastConfiguration.java

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/*
 * (C) Copyright 2014 Chiral Behaviors, All Rights Reserved
 * 
 * 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.chiralBehaviors.slp.hive.configuration;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.InterfaceAddress;
import java.net.MulticastSocket;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

import com.chiralBehaviors.slp.hive.Engine;
import com.chiralBehaviors.slp.hive.MulticastEngine;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
import com.fasterxml.uuid.Generators;
import com.hellblazer.utils.Tuple;

/**
 * @author hhildebrand
 * 
 */
public class BroadcastConfiguration extends EngineConfiguration {
    public static BroadcastConfiguration fromYaml(File yaml)
            throws JsonParseException, JsonMappingException, IOException {
        return fromYaml(new FileInputStream(yaml));
    }

    public static BroadcastConfiguration fromYaml(InputStream yaml)
            throws JsonParseException, JsonMappingException, IOException {
        ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
        mapper.registerModule(new EngineModule());
        return mapper.readValue(yaml, BroadcastConfiguration.class);
    }

    public boolean ipv4 = true;
    public int port = 56999;

    /* (non-Javadoc)
     * @see com.chiralBehaviors.slp.hive.configuration.EngineConfiguration#construct()
     */
    @Override
    public Engine construct() throws IOException {
        Tuple<NetworkInterface, InetSocketAddress> tuple = getNetworkInterface();
        DatagramSocket socket = new MulticastSocket(new InetSocketAddress(port));
        socket.setReuseAddress(true);
        socket.setBroadcast(true);
        return new MulticastEngine(getFdFactory(), Generators.timeBasedGenerator(), heartbeatPeriod, heartbeatUnit,
                socket, tuple.b, receiveBufferMultiplier, sendBufferMultiplier, getMac(), tuple.a);
    }

    InetSocketAddress getBroadcastAddress(NetworkInterface networkInterface) {
        InetSocketAddress broadcastAddress = null;
        for (InterfaceAddress addr : networkInterface.getInterfaceAddresses()) {
            if (ipv4) {
                if (addr.getBroadcast() != null && addr.getBroadcast().getAddress().length == 4) {
                    broadcastAddress = new InetSocketAddress(addr.getBroadcast(), port);
                    break;
                }
            } else {
                if (addr.getBroadcast() != null && addr.getBroadcast().getAddress().length > 4) {
                    broadcastAddress = new InetSocketAddress(addr.getBroadcast(), port);
                    break;
                }
            }
        }
        return broadcastAddress;
    }

    public Tuple<NetworkInterface, InetSocketAddress> getNetworkInterface() throws SocketException {
        if (networkInterface == null) {
            for (Enumeration<NetworkInterface> intfs = NetworkInterface.getNetworkInterfaces(); intfs
                    .hasMoreElements();) {
                NetworkInterface iface = intfs.nextElement();
                InetSocketAddress broadcastAddress = getBroadcastAddress(iface);
                if (broadcastAddress != null) {
                    return new Tuple<NetworkInterface, InetSocketAddress>(iface, broadcastAddress);
                }
            }
            throw new IllegalStateException("No interface supporting broadcast was discovered");
        }
        NetworkInterface iface = NetworkInterface.getByName(networkInterface);
        if (iface == null) {
            throw new IllegalArgumentException(
                    String.format("Cannot find network interface: %s ", networkInterface));
        }
        InetSocketAddress broadcastAddress = getBroadcastAddress(iface);
        if (broadcastAddress == null) {
            throw new IllegalStateException(
                    String.format("The interface [%s] does not broadcast", networkInterface));
        }
        return new Tuple<NetworkInterface, InetSocketAddress>(iface, broadcastAddress);
    }
}