| /* |
| * Util.java |
| * |
| * 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.metrics.spi; |
| |
| import java.net.InetSocketAddress; |
| import java.net.SocketAddress; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** |
| * Static utility methods |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public class Util { |
| |
| /** |
| * This class is not intended to be instantiated |
| */ |
| private Util() {} |
| |
| /** |
| * 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. |
| * |
| * @return a list of InetSocketAddress objects. |
| */ |
| public static List<InetSocketAddress> parse(String specs, int defaultPort) { |
| List<InetSocketAddress> result = new ArrayList<InetSocketAddress>(1); |
| if (specs == null) { |
| result.add(new InetSocketAddress("localhost", defaultPort)); |
| } |
| else { |
| String[] specStrings = specs.split("[ ,]+"); |
| for (String specString : specStrings) { |
| int colon = specString.indexOf(':'); |
| if (colon < 0 || colon == specString.length() - 1) { |
| result.add(new InetSocketAddress(specString, defaultPort)); |
| } else { |
| String hostname = specString.substring(0, colon); |
| int port = Integer.parseInt(specString.substring(colon+1)); |
| result.add(new InetSocketAddress(hostname, port)); |
| } |
| } |
| } |
| return result; |
| } |
| |
| } |