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.full.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 RESTful services.
37 * @author Michael Watkins (michael.watkins@ericsson.com)
39 public class ApexServicesRestParameterParser {
40 // Apache Commons CLI options
41 private Options options;
44 * Construct the options for the CLI RESTful services.
46 public ApexServicesRestParameterParser() {
47 options = new Options();
48 options.addOption("h", "help", false, "outputs the usage of this command");
49 options.addOption(Option.builder("p").longOpt("port").desc("port to use for the Apex Services REST calls")
50 .hasArg().argName("PORT").required(false).type(Number.class).build());
51 options.addOption(Option.builder("t").longOpt("time-to-live")
52 .desc("the amount of time in seconds that the server will run for before terminating").hasArg()
53 .argName("TIME_TO_LIVE").required(false).type(Number.class).build());
57 * Parse the command line options.
59 * @param args the arguments
60 * @return parsed parameters
62 public ApexServicesRestParameters parse(final String[] args) {
63 CommandLine commandLine = null;
65 commandLine = new DefaultParser().parse(options, args);
66 } catch (final ParseException e) {
67 throw new ApexServicesRestParameterException(
68 "invalid command line arguments specified : " + e.getMessage());
71 final ApexServicesRestParameters parameters = new ApexServicesRestParameters();
72 final String[] remainingArgs = commandLine.getArgs();
74 if (commandLine.getArgs().length > 0) {
75 throw new ApexServicesRestParameterException(
76 "too many command line arguments specified : " + Arrays.toString(remainingArgs));
79 if (commandLine.hasOption('h')) {
80 parameters.setHelp(true);
83 if (commandLine.hasOption('p')) {
84 parameters.setRestPort(((Number) commandLine.getParsedOptionValue("port")).intValue());
86 } catch (final ParseException e) {
87 throw new ApexServicesRestParameterException("error parsing argument \"port\" :" + e.getMessage(), e);
90 if (commandLine.hasOption('t')) {
91 parameters.setTimeToLive(((Number) commandLine.getParsedOptionValue("time-to-live")).longValue());
93 } catch (final ParseException e) {
94 throw new ApexServicesRestParameterException("error parsing argument \"time-to-live\" :" + e.getMessage(),
102 * Get help information.
104 * @param mainClassName the main class name for the help output
105 * @return help string
107 public String getHelp(final String mainClassName) {
108 final StringWriter stringWriter = new StringWriter();
109 final PrintWriter stringPrintWriter = new PrintWriter(stringWriter);
111 final HelpFormatter helpFormatter = new HelpFormatter();
112 helpFormatter.printHelp(stringPrintWriter, 120, mainClassName + " [options...] ", "", options, 0, 0, "");
114 return stringWriter.toString();