1 /* 2 * Copyright 2018, OpenCensus Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package io.opencensus.examples.grpc.helloworld; 18 19 import java.util.logging.Logger; 20 import javax.annotation.Nullable; 21 22 /** Util methods. */ 23 final class HelloWorldUtils { 24 25 private static final Logger logger = Logger.getLogger(HelloWorldUtils.class.getName()); 26 getPortOrDefaultFromArgs(String[] args, int index, int defaultPort)27 static int getPortOrDefaultFromArgs(String[] args, int index, int defaultPort) { 28 int portNumber = defaultPort; 29 if (index < args.length) { 30 try { 31 portNumber = Integer.parseInt(args[index]); 32 } catch (NumberFormatException e) { 33 logger.warning( 34 String.format("Port %s is invalid, use default port %d.", args[index], defaultPort)); 35 } 36 } 37 return portNumber; 38 } 39 getStringOrDefaultFromArgs( String[] args, int index, @Nullable String defaultString)40 static String getStringOrDefaultFromArgs( 41 String[] args, int index, @Nullable String defaultString) { 42 String s = defaultString; 43 if (index < args.length) { 44 s = args[index]; 45 } 46 return s; 47 } 48 HelloWorldUtils()49 private HelloWorldUtils() {} 50 } 51