Java Local Address Check isLocal(String brokerAddress)

Description

return Whether the specified host:port corresponds to the local machine

License

Open Source License

Parameter

Parameter	Description
brokerAddress	a parameter

Declaration

public static boolean isLocal(String brokerAddress) 

Method Source Code

//package com.java2s;
/*//from   w  w  w.j  av  a 2s.c  o  m
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 * and Distribution License("CDDL") (collectively, the "License").  You
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import java.net.InetAddress;

import java.net.UnknownHostException;

public class Main {
    /**
     * return Whether the specified host:port corresponds to the local machine
     * @param brokerAddress
     * @return
     */
    public static boolean isLocal(String brokerAddress) {

        String otherIP = getHost(getIPPort(brokerAddress));
        InetAddress localHost;
        try {
            localHost = InetAddress.getLocalHost();
            InetAddress inetAddresses[] = InetAddress.getAllByName(localHost.getHostName());
            for (int i = 0; i < inetAddresses.length; i++) {
                InetAddress thisInetAddr = inetAddresses[i];
                String thisIP = thisInetAddr.getHostAddress();
                if (thisIP.equals(otherIP)) {
                    return true;
                }

            }
        } catch (UnknownHostException e1) {
            e1.printStackTrace();
            return true;
        }
        return false;
    }

    /**
     * Parse the specified brokerAddress (which is of the form host:port) and return the host
     * @param brokerAddress
     * @return
     */
    public static String getHost(String brokerAddress) {
        int colonPosition = brokerAddress.indexOf(":");
        String host = brokerAddress.substring(0, colonPosition);
        return host;
    }

    /**
     * Return a String of the form <ipAddress>:<port>
     * corresponding to the specified <host>:>port>
     * @param hostPort
     * @return
     */
    public static String getIPPort(String hostPort) {
        String result = hostPort;
        String host = getHost(hostPort);
        int port = getPort(hostPort);
        try {
            InetAddress hostIP[] = InetAddress.getAllByName(host);
            result = hostIP[0].getHostAddress() + ":" + port;
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }

        return result;
    }

    /**
     * Parse the specified brokerAddress (which is of the form host:port) and return the host
     * @param brokerAddress
     * @return
     */
    public static int getPort(String brokerAddress) {
        int colonPosition = brokerAddress.indexOf(":");
        String portString = brokerAddress.substring(colonPosition + 1);
        int port = Integer.valueOf(portString).intValue();
        return port;
    }
}

Related

1. isLocalAddress(final String addr)
2. isLocalAddress(final String address)
3. isLocalAddress(String address)
4. isLocalAddress(String address)