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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2020 Nordix Foundation.
* ================================================================================
* Licensed 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.gui.pdp.monitoring;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Arrays;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.DefaultParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
/**
* This class reads and handles command line parameters to the Pdp Statistics services.
*
* @author Yehui Wang (yehui.wang@est.tech)
*/
public class PdpMonitoringServerParameterParser {
// Apache Commons CLI options
private final Options options;
/**
* Construct the options for the Pdp monitoring services.
*/
public PdpMonitoringServerParameterParser() {
options = new Options();
options.addOption("h", "help", false, "outputs the usage of this command");
options.addOption(Option.builder("p").longOpt("port").desc("port to use for the Pdp Services REST calls")
.hasArg().argName("PORT").required(false).type(Number.class).build());
options.addOption(Option.builder("t").longOpt("time-to-live")
.desc("the amount of time in seconds that the server will run for before terminating").hasArg()
.argName("TIME_TO_LIVE").required(false).type(Number.class).build());
}
/**
* Parse the command line options.
*
* @param args the arguments
* @return parsed parameters
*/
public PdpMonitoringServerParameters parse(final String[] args) {
CommandLine commandLine = null;
try {
commandLine = new DefaultParser().parse(options, args);
} catch (final ParseException e) {
throw new PdpMonitoringServerParameterException("invalid command line arguments specified", e);
}
final PdpMonitoringServerParameters parameters = new PdpMonitoringServerParameters();
final String[] remainingArgs = commandLine.getArgs();
if (commandLine.getArgs().length > 0) {
throw new PdpMonitoringServerParameterException(
"too many command line arguments specified : " + Arrays.toString(remainingArgs));
}
if (commandLine.hasOption('h')) {
parameters.setHelpSet(true);
}
try {
if (commandLine.hasOption('p')) {
parameters.setPort(((Number) commandLine.getParsedOptionValue("port")).intValue());
}
} catch (final ParseException e) {
throw new PdpMonitoringServerParameterException("error parsing argument \"port\"", e);
}
try {
if (commandLine.hasOption('t')) {
parameters.setTimeToLive(((Number) commandLine.getParsedOptionValue("time-to-live")).longValue());
}
} catch (final ParseException e) {
throw new PdpMonitoringServerParameterException("error parsing argument \"time-to-live\"", e);
}
return parameters;
}
/**
* Get help information.
*
* @param mainClassName the main class name for the help output
* @return help string
*/
public String getHelp(final String mainClassName) {
final StringWriter stringWriter = new StringWriter();
final PrintWriter stringPrintWriter = new PrintWriter(stringWriter);
final HelpFormatter helpFormatter = new HelpFormatter();
helpFormatter.printHelp(stringPrintWriter, 120, mainClassName + " [options...] ", "", options, 0, 0, "");
return stringWriter.toString();
}
}
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