Java HTTP Port Find isTcpPortOpenCallable(final int port)

Description

is Tcp Port Open Callable

License

Apache License

Declaration

public static Callable<Boolean> isTcpPortOpenCallable(final int port) 

Method Source Code

//package com.java2s;
/*/*  w ww .  j a v a2  s .  c  om*/
 * Copyright 2016, The OpenNMS Group
 * 
 * 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.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.util.concurrent.Callable;

public class Main {
    public static final int DEFAULT_CONNECT_TIMEOUT_MS = 100;

    public static Callable<Boolean> isTcpPortOpenCallable(final int port) {
        return isTcpPortOpenCallable(port, DEFAULT_CONNECT_TIMEOUT_MS);
    }

    public static Callable<Boolean> isTcpPortOpenCallable(final int port, final int connectTimeoutMs) {
        return new Callable<Boolean>() {
            public Boolean call() throws Exception {
                return isTcpPortOpen(port, connectTimeoutMs);
            }
        };
    }

    public static boolean isTcpPortOpen(int port) {
        return isTcpPortOpen(new InetSocketAddress(InetAddress.getLoopbackAddress(), port),
                DEFAULT_CONNECT_TIMEOUT_MS);
    }

    public static boolean isTcpPortOpen(int port, int connectTimeoutMs) {
        return isTcpPortOpen(new InetSocketAddress(InetAddress.getLoopbackAddress(), port), connectTimeoutMs);
    }

    public static boolean isTcpPortOpen(InetSocketAddress addr) {
        return isTcpPortOpen(addr, DEFAULT_CONNECT_TIMEOUT_MS);
    }

    public static boolean isTcpPortOpen(InetSocketAddress addr, int connectTimeoutMs) {
        try (Socket socket = new Socket()) {
            socket.connect(addr, connectTimeoutMs);
            return true;
        } catch (Exception ex) {
            return false;
        }
    }
}

Related

1. isStart(String host, int port)
2. isStart0(String host, int port)
3. issueHttpRequest(String methodName, int[] rc, String host, String port, String path)
4. isTcpPortOpen(int port)
5. isTcpPortOpenCallable(final int port)
6. loadStringSupportedType(String javaType)
7. parse(final String desc, final int defaultPort)
8. parse(String specs, int defaultPort)
9. parseCommaDelimitedHosts2(String hosts, int port_range)