Java HTTP Port Find getAvailablePorts(int basePort, int portCount)

Description

get Available Ports

License

Open Source License

Declaration

public static List<Integer> getAvailablePorts(int basePort, int portCount) 

Method Source Code

//package com.java2s;
/*//  ww  w .  j  a va  2s  . c  o  m
 * Copyright (c) 2008-2016, Hazelcast, Inc. 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.
 */

import java.io.IOException;
import java.net.DatagramSocket;
import java.net.ServerSocket;
import java.util.ArrayList;

import java.util.List;

public class Main {
    public static List<Integer> getAvailablePorts(int basePort, int portCount) {
        List<Integer> availablePorts = new ArrayList<Integer>();
        int port = basePort;
        for (int i = 0; i < portCount; i++) {
            while (!isPortAvailable(port)) {
                port++;
            }
            availablePorts.add(port++);
        }
        return availablePorts;
    }

    public static boolean isPortAvailable(int port) {
        ServerSocket ss = null;
        DatagramSocket ds = null;
        try {
            ss = new ServerSocket(port);
            ss.setReuseAddress(true);
            ds = new DatagramSocket(port);
            ds.setReuseAddress(true);
            return true;
        } catch (IOException e) {

        } finally {
            if (ds != null) {
                ds.close();
            }
            if (ss != null) {
                try {
                    ss.close();
                } catch (IOException e) {

                }
            }
        }

        return false;
    }
}

Related

1. getAvailablePort(int port)
2. getAvailablePort(int prefferedPort)
3. getAvailablePort(int randomAttempts)
4. getAvailablePort(int startPort)
5. getAvailablePort(String hostname, String portRange)
6. getAvailablePortsFromRange(int portMin, int portMax, int numberOfPorts)
7. getAvialablePort(final int basePort)
8. getCorrectHostnamePort(String hostPort)
9. getEffectivePort(String scheme, int specifiedPort)