2 * ============LICENSE_START=======================================================
3 * Copyright (C) 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.testsuites.performance.benchmark.eventgenerator;
23 import com.google.gson.Gson;
25 import java.io.IOException;
26 import java.io.PrintWriter;
27 import java.io.StringWriter;
28 import java.util.Arrays;
30 import org.apache.commons.cli.CommandLine;
31 import org.apache.commons.cli.DefaultParser;
32 import org.apache.commons.cli.HelpFormatter;
33 import org.apache.commons.cli.Option;
34 import org.apache.commons.cli.Options;
35 import org.apache.commons.cli.ParseException;
36 import org.onap.policy.apex.model.utilities.TextFileUtils;
37 import org.slf4j.ext.XLogger;
38 import org.slf4j.ext.XLoggerFactory;
41 * This class reads and handles command line parameters to the event generator.
43 public class EventGeneratorParameterHandler {
44 // Get a reference to the logger
45 private static final XLogger LOGGER = XLoggerFactory.getXLogger(EventGeneratorParameterHandler.class);
47 private static final String CONFIGURATION_FILE = "configuration-file";
48 private static final String PORT = "port";
49 private static final String HOST = "host";
50 private static final String HELP = "help";
51 private static final String BATCH_SIZE = "batch-size";
52 private static final String BATCH_COUNT = "batch-count";
53 private static final String BATCH_DELAY = "delay-between-batches";
54 private static final String OUTPUT_FILE = "output-file";
56 private static final int MAX_HELP_LINE_LENGTH = 120;
58 // Apache Commons CLI options
59 private final Options options;
62 * Construct the options for the CLI editor.
64 public EventGeneratorParameterHandler() {
65 options = new Options();
66 options.addOption(Option.builder("h").longOpt(HELP).desc("outputs the usage of this command").required(false)
67 .type(Boolean.class).build());
68 options.addOption(Option.builder("H").longOpt(HOST)
69 .desc("the host name on which to start the event generation server, defaults to \"localhost\"")
70 .hasArg().argName(HOST).required(false).type(String.class).build());
71 options.addOption(Option.builder("p").longOpt(PORT)
72 .desc("the port on which to start the event generation server, defaults to 42339").hasArg()
73 .argName(PORT).required(false).type(Number.class).build());
74 options.addOption(Option.builder("c").longOpt(CONFIGURATION_FILE)
75 .desc("name of a file containing the parameters for the event generations server, "
76 + "this option must appear on its own")
77 .hasArg().argName(CONFIGURATION_FILE).required(false).type(String.class).build());
78 options.addOption(Option.builder("o").longOpt(OUTPUT_FILE)
79 .desc("path and name of a file to which output will be written,"
80 + " if not specified no output is written")
81 .hasArg().argName(OUTPUT_FILE).required(false).type(String.class).build());
82 options.addOption(Option.builder("bc").longOpt(BATCH_COUNT)
83 .desc("the number of batches of events to send, must be 0 or more, "
84 + "0 means send event batches forever, defaults to 1")
85 .hasArg().argName(BATCH_COUNT).required(false).type(Number.class).build());
86 options.addOption(Option.builder("bs").longOpt(BATCH_SIZE)
87 .desc("the number of events to send in an event batch, must be 1 or more, defaults to 1")
88 .hasArg().argName(BATCH_SIZE).required(false).type(Number.class).build());
89 options.addOption(Option.builder("bd").longOpt(BATCH_DELAY)
90 .desc("the delay in milliseconds between event batches, must be zero or more, "
91 + "defaults to 10,000 (10 seconds)")
92 .hasArg().argName(BATCH_DELAY).required(false).type(Number.class).build());
96 * Parse the command line options.
98 * @param args The arguments
99 * @return the CLI parameters
100 * @throws ParseException on parse errors
102 public EventGeneratorParameters parse(final String[] args) throws ParseException {
103 CommandLine commandLine = new DefaultParser().parse(options, args);
104 final String[] remainingArgs = commandLine.getArgs();
106 if (remainingArgs.length > 0) {
107 throw new ParseException("too many command line arguments specified : " + Arrays.toString(remainingArgs));
110 if (commandLine.hasOption('h')) {
114 EventGeneratorParameters parameters = new EventGeneratorParameters();
116 if (commandLine.hasOption('c')) {
117 parameters = getParametersFromJsonFile(commandLine.getOptionValue(CONFIGURATION_FILE));
120 parseFlags(commandLine, parameters);
122 if (commandLine.hasOption('o')) {
123 parameters.setOutFile(commandLine.getOptionValue(OUTPUT_FILE));
126 if (!parameters.isValid()) {
127 throw new ParseException("specified parameters are not valid: " + parameters.validate().getResult());
134 * Parse the command flags.
136 * @param commandLine the command line to parse
137 * @param parameters the parameters we are parsing into
138 * @throws ParseException on parse errors
140 private void parseFlags(CommandLine commandLine, EventGeneratorParameters parameters) throws ParseException {
141 if (commandLine.hasOption('H')) {
142 parameters.setHost(commandLine.getOptionValue(HOST));
145 if (commandLine.hasOption('p')) {
146 parameters.setPort(((Number) commandLine.getParsedOptionValue(PORT)).intValue());
149 if (commandLine.hasOption("bc")) {
150 parameters.setBatchCount(((Number) commandLine.getParsedOptionValue(BATCH_COUNT)).intValue());
153 if (commandLine.hasOption("bs")) {
154 parameters.setBatchSize(((Number) commandLine.getParsedOptionValue(BATCH_SIZE)).intValue());
157 if (commandLine.hasOption("bd")) {
158 parameters.setDelayBetweenBatches(((Number) commandLine.getParsedOptionValue(BATCH_DELAY)).longValue());
163 * Get the parameters from a JSON file.
165 * @param configurationFile the location of the configuration file
166 * @return the parameters read from the JSON file
167 * @throws ParseException on errors reading the parameters
169 private EventGeneratorParameters getParametersFromJsonFile(String configurationFile) throws ParseException {
170 String parameterJsonString = null;
173 parameterJsonString = TextFileUtils.getTextFileAsString(configurationFile);
174 } catch (IOException ioe) {
175 String errorMessage = "Could not read parameters from configuration file \"" + configurationFile + "\": "
177 LOGGER.warn(errorMessage, ioe);
178 throw new ParseException(errorMessage);
181 if (parameterJsonString == null || parameterJsonString.trim().length() == 0) {
182 String errorMessage = "No parameters found in configuration file \"" + configurationFile + "\"";
183 LOGGER.warn(errorMessage);
184 throw new ParseException(errorMessage);
188 return new Gson().fromJson(parameterJsonString, EventGeneratorParameters.class);
189 } catch (Exception ge) {
190 String errorMessage = "Error parsing JSON parameters from configuration file \"" + configurationFile
191 + "\": " + ge.getMessage();
192 LOGGER.warn(errorMessage, ge);
193 throw new ParseException(errorMessage);
198 * Get help information.
200 * @param mainClassName the main class name for the help output
201 * @return help string
203 public String getHelp(final String mainClassName) {
204 final StringWriter stringWriter = new StringWriter();
205 final PrintWriter stringPrintWriter = new PrintWriter(stringWriter);
207 final HelpFormatter helpFormatter = new HelpFormatter();
208 helpFormatter.printHelp(stringPrintWriter, MAX_HELP_LINE_LENGTH, mainClassName + " [options...] ", "", options,
211 return stringWriter.toString();