Java tutorial
/** * 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.metron.helpers.services; import org.apache.commons.cli.BasicParser; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.HelpFormatter; import org.apache.commons.cli.Option; import org.apache.commons.cli.Options; import org.apache.commons.cli.ParseException; public class PcapServiceCli { private String[] args = null; private Options options = new Options(); int port = 8081; String uri = "/pcapGetter"; public int getPort() { return port; } public void setPort(int port) { this.port = port; } public String getUri() { return uri; } public void setUri(String uri) { this.uri = uri; } public PcapServiceCli(String[] args) { this.args = args; Option help = new Option("h", "Display help menue"); options.addOption(help); options.addOption("port", true, "OPTIONAL ARGUMENT [portnumber] If this argument sets the port for starting the service. If this argument is not set the port will start on defaut port 8081"); options.addOption("endpoint_uri", true, "OPTIONAL ARGUMENT [/uri/to/service] This sets the URI for the service to be hosted. The default URI is /pcapGetter"); } public void parse() { CommandLineParser parser = new BasicParser(); CommandLine cmd = null; try { cmd = parser.parse(options, args); } catch (ParseException e1) { e1.printStackTrace(); } if (cmd.hasOption("h")) help(); if (cmd.hasOption("port")) { try { port = Integer.parseInt(cmd.getOptionValue("port").trim()); } catch (Exception e) { System.out.println("[Metron] Invalid value for port entered"); help(); } } if (cmd.hasOption("endpoint_uri")) { try { if (uri == null || uri.equals("")) throw new Exception("invalid uri"); uri = cmd.getOptionValue("uri").trim(); if (uri.charAt(0) != '/') uri = "/" + uri; if (uri.charAt(uri.length()) == '/') uri = uri.substring(0, uri.length() - 1); } catch (Exception e) { System.out.println("[Metron] Invalid URI entered"); help(); } } } private void help() { // This prints out some help HelpFormatter formater = new HelpFormatter(); formater.printHelp("Topology Options:", options); // System.out // .println("[Metron] Example usage: \n storm jar Metron-Topologies-0.3BETA-SNAPSHOT.jar org.apache.metron.topology.Bro -local_mode true -config_path Metron_Configs/ -generator_spout true"); System.exit(0); } }