2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.apex.client.editor.rest;
23 import java.io.PrintWriter;
24 import java.io.StringWriter;
25 import java.util.Arrays;
27 import org.apache.commons.cli.CommandLine;
28 import org.apache.commons.cli.DefaultParser;
29 import org.apache.commons.cli.HelpFormatter;
30 import org.apache.commons.cli.Option;
31 import org.apache.commons.cli.Options;
32 import org.apache.commons.cli.ParseException;
35 * This class reads and handles command line parameters to the Apex CLI editor.
37 * @author Liam Fallon (liam.fallon@ericsson.com)
39 public class ApexEditorParameterParser {
40 // Apache Commons CLI options
41 private Options options;
43 private static final int COMMAND_HELP_MAX_LINE_WIDTH = 120;
46 * Construct the options for the CLI editor.
48 public ApexEditorParameterParser() {
49 options = new Options();
50 options.addOption("h", "help", false, "outputs the usage of this command");
52 Option.builder("p").longOpt("port").desc("port to use for the Apex RESTful editor REST calls.").hasArg()
53 .argName("PORT").required(false).type(Number.class).build());
54 options.addOption(Option.builder("t").longOpt("time-to-live")
55 .desc("the amount of time in seconds that the server will run for before terminating. "
56 + "Default value is " + ApexEditorParameters.INFINITY_TIME_TO_LIVE + " to run indefinitely.")
57 .hasArg().argName("TIME_TO_LIVE").required(false).type(Number.class).build());
58 options.addOption(Option.builder("l").longOpt("listen")
59 .desc("the IP address to listen on. Default value is " + ApexEditorParameters.DEFAULT_SERVER_URI_ROOT
60 + " to restrict access to the local machine only.")
61 .hasArg().argName("ADDRESS").required(false).type(String.class).build());
65 * Parse the command line options.
67 * @param args The arguments
68 * @return the apex editor parameters
70 public ApexEditorParameters parse(final String[] args) {
71 CommandLine commandLine = null;
73 commandLine = new DefaultParser().parse(options, args);
74 } catch (final ParseException e) {
75 throw new ApexEditorParameterException("invalid command line arguments specified : " + e.getMessage());
78 final ApexEditorParameters parameters = new ApexEditorParameters();
79 final String[] remainingArgs = commandLine.getArgs();
81 if (commandLine.getArgs().length > 0) {
82 throw new ApexEditorParameterException(
83 "too many command line arguments specified : " + Arrays.toString(remainingArgs));
86 if (commandLine.hasOption('h')) {
87 parameters.setHelp(true);
90 if (commandLine.hasOption('p')) {
91 parameters.setRestPort(((Number) commandLine.getParsedOptionValue("port")).intValue());
93 } catch (final ParseException e) {
94 throw new ApexEditorParameterException("error parsing argument \"port\" :" + e.getMessage(), e);
97 if (commandLine.hasOption('t')) {
98 parameters.setTimeToLive(((Number) commandLine.getParsedOptionValue("time-to-live")).longValue());
100 } catch (final ParseException e) {
101 throw new ApexEditorParameterException("error parsing argument \"time-to-live\" :" + e.getMessage(), e);
104 if (commandLine.hasOption('l')) {
105 parameters.setListenAddress(commandLine.getParsedOptionValue("listen").toString());
107 } catch (final ParseException e) {
108 throw new ApexEditorParameterException("error parsing argument \"listen-address\" :" + e.getMessage(), e);
115 * Get help information.
117 * @param mainClassName the main class name
120 public String getHelp(final String mainClassName) {
121 final StringWriter stringWriter = new StringWriter();
122 final PrintWriter stringPrintWriter = new PrintWriter(stringWriter);
124 final HelpFormatter helpFormatter = new HelpFormatter();
125 helpFormatter.printHelp(stringPrintWriter, COMMAND_HELP_MAX_LINE_WIDTH, mainClassName + " [options...] ", null,
128 return stringWriter.toString();