| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.alibaba.jstorm.utils; |
| |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.net.ServerSocket; |
| import java.net.UnknownHostException; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.commons.lang.StringUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Network utilis |
| * |
| * @author yannian |
| * |
| */ |
| public class NetWorkUtils { |
| private static Logger LOG = LoggerFactory.getLogger(NetWorkUtils.class); |
| |
| public static String hostname() { |
| String hostname = null; |
| try { |
| hostname = InetAddress.getLocalHost().getCanonicalHostName(); |
| } catch (UnknownHostException e) { |
| LOG.error("local_hostname", e); |
| } |
| return hostname; |
| } |
| |
| public static String ip() { |
| String hostname = null; |
| try { |
| hostname = InetAddress.getLocalHost().getHostAddress(); |
| } catch (UnknownHostException e) { |
| LOG.error("local_hostname", e); |
| } |
| return hostname; |
| } |
| |
| /** |
| * Check whether the port is available to binding |
| * |
| * @param port |
| * @return -1 means not available, others means available |
| * @throws IOException |
| */ |
| public static int tryPort(int port) throws IOException { |
| ServerSocket socket = new ServerSocket(port); |
| int rtn = socket.getLocalPort(); |
| socket.close(); |
| return rtn; |
| } |
| |
| /** |
| * get one available port |
| * |
| * @return -1 means failed, others means one availablePort |
| */ |
| public static int getAvailablePort() { |
| return availablePort(0); |
| } |
| |
| /** |
| * Check whether the port is available to binding |
| * |
| * @param prefered |
| * @return -1 means not available, others means available |
| */ |
| public static int availablePort(int prefered) { |
| int rtn = -1; |
| try { |
| rtn = tryPort(prefered); |
| } catch (IOException e) { |
| |
| } |
| return rtn; |
| } |
| |
| public static String host2Ip(String host) { |
| InetAddress address = null; |
| try { |
| address = InetAddress.getByName(host); |
| } catch (UnknownHostException e) { |
| LOG.warn("NetWorkUtil can't transfer hostname(" + host + ") to ip, return hostname", e); |
| return host; |
| } |
| return address.getHostAddress(); |
| } |
| |
| public static List<String> host2Ip(List<String> servers) { |
| if (servers == null || servers.size() == 0) { |
| return new ArrayList<String>(); |
| } |
| |
| Set<String> ret = new HashSet<String>(); |
| for (String server : servers) { |
| if (StringUtils.isBlank(server)) { |
| continue; |
| } |
| |
| InetAddress ia; |
| try { |
| ia = InetAddress.getByName(server); |
| } catch (UnknownHostException e) { |
| // TODO Auto-generated catch block |
| LOG.info("Fail to get address of ", server); |
| continue; |
| } |
| if (ia.isLoopbackAddress() || ia.isAnyLocalAddress()) { |
| ret.add(NetWorkUtils.ip()); |
| } else { |
| ret.add(ia.getHostAddress()); |
| } |
| } |
| |
| return JStormUtils.mk_list(ret); |
| } |
| |
| public static String ip2Host(String ip) { |
| InetAddress address = null; |
| try { |
| address = InetAddress.getByName(ip); |
| } catch (UnknownHostException e) { |
| LOG.warn("NetWorkUtil can't transfer ip(" + ip + ") to hostname, return ip", e); |
| return ip; |
| } |
| return address.getHostName(); |
| } |
| |
| public static boolean equals(String host1, String host2) { |
| |
| if (StringUtils.equalsIgnoreCase(host1, host2) == true) { |
| return true; |
| } |
| |
| if (host1 == null || host2 == null) { |
| return false; |
| } |
| |
| String ip1 = host2Ip(host1); |
| String ip2 = host2Ip(host2); |
| |
| return StringUtils.equalsIgnoreCase(ip1, ip2); |
| |
| } |
| |
| public static void main(String[] args) { |
| List<String> servers = new ArrayList<String>(); |
| servers.add("localhost"); |
| |
| System.out.println(host2Ip(servers)); |
| |
| } |
| |
| } |