| /* |
| * 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 org.apache.camel.util; |
| |
| import java.net.InetAddress; |
| import java.net.NetworkInterface; |
| import java.net.SocketException; |
| import java.net.UnknownHostException; |
| import java.util.Enumeration; |
| import java.util.LinkedHashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.TreeMap; |
| |
| public final class HostUtils { |
| |
| private HostUtils() { |
| //Utility Class |
| } |
| |
| /** |
| * Returns a {@link Map} of {@link InetAddress} per {@link NetworkInterface}. |
| */ |
| public static Map<String, Set<InetAddress>> getNetworkInterfaceAddresses() { |
| //JVM returns interfaces in a non-predictable order, so to make this more predictable |
| //let's have them sort by interface name (by using a TreeMap). |
| Map<String, Set<InetAddress>> interfaceAddressMap = new TreeMap<>(); |
| try { |
| Enumeration<NetworkInterface> ifaces = NetworkInterface.getNetworkInterfaces(); |
| while (ifaces.hasMoreElements()) { |
| NetworkInterface iface = ifaces.nextElement(); |
| //We only care about usable non-loopback interfaces. |
| if (iface.isUp() && !iface.isLoopback() && !iface.isPointToPoint()) { |
| String name = iface.getName(); |
| Enumeration<InetAddress> ifaceAdresses = iface.getInetAddresses(); |
| while (ifaceAdresses.hasMoreElements()) { |
| InetAddress ia = ifaceAdresses.nextElement(); |
| //We want to filter out mac addresses |
| if (!ia.isLoopbackAddress() && !ia.getHostAddress().contains(":")) { |
| Set<InetAddress> addresses = interfaceAddressMap.get(name); |
| if (addresses == null) { |
| addresses = new LinkedHashSet<>(); |
| } |
| addresses.add(ia); |
| interfaceAddressMap.put(name, addresses); |
| } |
| } |
| } |
| } |
| } catch (SocketException ex) { |
| //noop |
| } |
| return interfaceAddressMap; |
| } |
| |
| /** |
| * Returns a {@link Set} of {@link InetAddress} that are non-loopback or mac. |
| */ |
| public static Set<InetAddress> getAddresses() { |
| Set<InetAddress> allAddresses = new LinkedHashSet<>(); |
| Map<String, Set<InetAddress>> interfaceAddressMap = getNetworkInterfaceAddresses(); |
| for (Map.Entry<String, Set<InetAddress>> entry : interfaceAddressMap.entrySet()) { |
| Set<InetAddress> addresses = entry.getValue(); |
| if (!addresses.isEmpty()) { |
| for (InetAddress address : addresses) { |
| allAddresses.add(address); |
| } |
| } |
| } |
| return allAddresses; |
| } |
| |
| |
| /** |
| * Chooses one of the available {@link InetAddress} based on the specified preference. |
| */ |
| private static InetAddress chooseAddress() throws UnknownHostException { |
| Set<InetAddress> addresses = getAddresses(); |
| if (addresses.contains(InetAddress.getLocalHost())) { |
| //Then if local host address is not bound to a loop-back interface, use it. |
| return InetAddress.getLocalHost(); |
| } else if (addresses != null && !addresses.isEmpty()) { |
| //else return the first available addrress |
| return addresses.toArray(new InetAddress[addresses.size()])[0]; |
| } else { |
| //else we are forcedt to use the localhost address. |
| return InetAddress.getLocalHost(); |
| } |
| } |
| |
| /** |
| * Returns the local hostname. It loops through the network interfaces and returns the first non loopback hostname |
| */ |
| public static String getLocalHostName() throws UnknownHostException { |
| return chooseAddress().getHostName(); |
| } |
| |
| /** |
| * Returns the local IP. It loops through the network interfaces and returns the first non loopback address |
| */ |
| public static String getLocalIp() throws UnknownHostException { |
| return chooseAddress().getHostAddress(); |
| } |
| |
| } |