| /** |
| * 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.hadoop.metrics2.sink.util; |
| |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.URI; |
| import java.net.UnknownHostException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** |
| * Helpers to handle server addresses |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public class Servers { |
| /** |
| * This class is not intended to be instantiated |
| */ |
| private Servers() {} |
| |
| /** |
| * Parses a space and/or comma separated sequence of server specifications |
| * of the form <i>hostname</i> or <i>hostname:port</i>. If |
| * the specs string is null, defaults to localhost:defaultPort. |
| * |
| * @param specs server specs (see description) |
| * @param defaultPort the default port if not specified |
| * @return a list of InetSocketAddress objects. |
| */ |
| public static List<InetSocketAddress> parse(String specs, int defaultPort) { |
| List<InetSocketAddress> result = new ArrayList<InetSocketAddress>(); |
| if (specs == null) { |
| result.add(new InetSocketAddress("localhost", defaultPort)); |
| } else { |
| String[] specStrings = specs.split("[ ,]+"); |
| for (String specString : specStrings) { |
| result.add(createSocketAddr(specString, defaultPort)); |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * @param host |
| * @param port |
| * @return a InetSocketAddress created with the specified host and port |
| */ |
| private static InetSocketAddress createSocketAddr(String target, int defaultPort) { |
| String helpText = ""; |
| if (target == null) { |
| throw new IllegalArgumentException("Target address cannot be null." + helpText); |
| } |
| boolean hasScheme = target.contains("://"); |
| URI uri = null; |
| try { |
| uri = hasScheme ? URI.create(target) : URI.create("dummyscheme://" + target); |
| } catch (IllegalArgumentException e) { |
| throw new IllegalArgumentException("Does not contain a valid host:port authority: " + target + helpText); |
| } |
| |
| String host = uri.getHost(); |
| int port = uri.getPort(); |
| if (port == -1) { |
| port = defaultPort; |
| } |
| String path = uri.getPath(); |
| |
| if ((host == null) || (port < 0) || (!hasScheme && path != null && !path.isEmpty())) { |
| throw new IllegalArgumentException("Does not contain a valid host:port authority: " + target + helpText); |
| } |
| return createSocketAddrForHost(host, port); |
| } |
| |
| /** |
| * @param host |
| * @param port |
| * @return a InetSocketAddress created with the specified host and port |
| */ |
| private static InetSocketAddress createSocketAddrForHost(String host, int port) { |
| InetSocketAddress addr; |
| try { |
| InetAddress iaddr = InetAddress.getByName(host); |
| iaddr = InetAddress.getByAddress(host, iaddr.getAddress()); |
| addr = new InetSocketAddress(iaddr, port); |
| } catch (UnknownHostException e) { |
| addr = InetSocketAddress.createUnresolved(host, port); |
| } |
| return addr; |
| } |
| |
| } |