com.dtstack.jlogstash.OptionsProcessor.java Source code

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Here is the source code for com.dtstack.jlogstash.OptionsProcessor.java

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/**
 * 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 com.dtstack.jlogstash;

import org.apache.commons.cli.BasicParser;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;

/**
 * 
 * Reason: TODO ADD REASON(?)
 * Date: 20170208 ?09:24:26
 * Company: www.dtstack.com
 * @author sishu.yss
 *
 */
public class OptionsProcessor {

    public class Option {
        String flag, opt;

        public Option(String flag, String opt) {
            this.flag = flag;

            this.opt = opt;
        }
    }

    static CommandLine parseArg(String[] args) throws ParseException {
        Options options = new Options();
        options.addOption("h", false, "usage help");
        options.addOption("help", false, "usage help");
        options.addOption("f", true, "configuration file");
        options.addOption("l", true, "log file");
        options.addOption("w", true, "filter worker number");
        options.addOption("o", true, "output worker number");
        options.addOption("c", true, "output queue size coefficient");
        options.addOption("i", true, "input queue size coefficient");
        options.addOption("v", false, "print error log");
        options.addOption("vv", false, "print warn log");
        options.addOption("vvv", false, "print info log");
        options.addOption("vvvv", false, "print debug log");
        options.addOption("vvvvv", false, "print trace log");
        CommandLineParser paraer = new BasicParser();
        CommandLine cmdLine = paraer.parse(options, args);
        if (cmdLine.hasOption("help") || cmdLine.hasOption("h")) {
            usage();
            System.exit(-1);
        }

        if (!cmdLine.hasOption("f")) {
            throw new ParseException("Required -f argument to specify config file");
        }
        return cmdLine;
    }

    /**
     * print help information
     */
    private static void usage() {
        StringBuilder helpInfo = new StringBuilder();
        helpInfo.append("-h").append("\t\t\thelp command").append("\n").append("-help").append("\t\t\thelp command")
                .append("\n").append("-f").append("\t\t\trequired config, indicate config file").append("\n")
                .append("-l").append("\t\t\tlog file that store the output").append("\n").append("-w")
                .append("\t\t\tfilter worker numbers").append("\n").append("-o")
                .append("\t\t\toutput worker numbers").append("\n").append("-c")
                .append("\t\t\t output queue size coefficient").append("\n").append("-i")
                .append("\t\t\t input queue size coefficient").append("\n").append("v")
                .append("\t\t\tprint error log").append("\n").append("vv").append("\t\t\tprint warn log")
                .append("\n").append("vvv").append("\t\t\tprint info log").append("\n").append("vvvv")
                .append("\t\t\tprint debug log").append("\n").append("vvvvv").append("\t\t\tprint trace log")
                .append("\n");
        System.out.println(helpInfo.toString());
    }
}