com.github.andyshao.system.JvmTask Maven / Gradle / Ivy

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package com.github.andyshao.system;

import com.github.andyshao.nio.BufferReader;
import com.github.andyshao.nio.ByteBufferReader;

import java.io.IOException;
import java.io.InputStream;
import java.nio.channels.Channels;

/**
 * 
 * Title:

 * Descript:

 * Copyright: Copryright(c) Sep 10, 2015

 * Encoding:UNIX UTF-8
 * 
 * @author Andy.Shao
 *
 */
public class JvmTask implements Task {
    /**args path*/
    public static final String ARGS_PATH = "com/github/andyshao/system/jvm.txt";
    /**command path*/
    public static final String COMMAND_PATH = "com/github/andyshao/system/jvmCommand.txt";
    /**keywords*/
    public static final String KEY_WORDS = "-jvm";
    /**method path*/
    public static final String METHOD_PATH = "com/github/andyshao/system/methodDescriptors.txt";
    /**reference path*/
    public static final String REFERENCE_PATH = "com/github/andyshao/system/reference.txt";
    /**sub option args*/
    public static final String SUB_OPTION_ARGS = "--args";
    /**sub option command*/
    public static final String SUB_OPTION_COMMAND = "--command";
    /**sub option method*/
    public static final String SUB_OPTION_METHOD = "--method";
    /**sub option type*/
    public static final String SUB_OPTION_TYPE = "--type";
    /**sub option reference*/
    public static final String SUB_OPTION_REFERENCE = "--ref";
    /**type path*/
    public static final String TYPE_PATH = "com/github/andyshao/system/typeDescription.txt";

    static byte[] readFile(String path) throws IOException {
        try (InputStream inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream(path); ByteBufferReader reader = new ByteBufferReader(Channels.newChannel(inputStream));) {
            reader.setFindSeparatePoint((buffer) -> new BufferReader.SeparatePoint(-1));
            return reader.read();
        }
    }

    private volatile Task nextTask = Task.EMPTY_TASK;

    @Override
    public Task getNextTask() {
        return this.nextTask;
    }

    @Override
    public boolean isDuty(String[] args) {
        if (args == null || args.length <= 0) return false;
        if (args[0].equals(JvmTask.KEY_WORDS)) return true;
        return false;
    }

    @Override
    public void process(String[] args) {
        String arg = args.length > 1 ? args[1] : "";
        try {
            switch (arg) {
            case SUB_OPTION_TYPE:
                System.out.println(new String(JvmTask.readFile(JvmTask.TYPE_PATH) , "UTF-8"));
                break;
            case SUB_OPTION_METHOD:
                System.out.println(new String(JvmTask.readFile(JvmTask.METHOD_PATH) , "UTF-8"));
                break;
            case SUB_OPTION_COMMAND:
                System.out.println(new String(JvmTask.readFile(JvmTask.COMMAND_PATH) , "UTF-8"));
                break;
            case SUB_OPTION_ARGS:
            	System.out.println(new String(JvmTask.readFile(JvmTask.REFERENCE_PATH), "UTF-8"));
            	break;
            default:
                System.out.println(new String(JvmTask.readFile(JvmTask.ARGS_PATH) , "UTF-8"));
                break;
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * set next task
     * @param nextTask next task
     */
    public void setNextTask(Task nextTask) {
        this.nextTask = nextTask;
    }

}