Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/* See LICENSE for licensing information */

import java.io.BufferedReader;
import java.io.File;

import java.io.InputStreamReader;

import java.util.StringTokenizer;

public class Main {
    public final static String SHELL_CMD_PS = "ps";
    public final static String SHELL_CMD_PIDOF = "pidof";

    public static int findProcessId(String command) {
        int procId = -1;

        try {
            procId = findProcessIdWithPidOf(command);

            if (procId == -1)
                procId = findProcessIdWithPS(command);
        } catch (Exception e) {
            try {
                procId = findProcessIdWithPS(command);
            } catch (Exception e2) {
                logException("Unable to get proc id for: " + command, e2);
            }
        }

        return procId;
    }

    public static int findProcessIdWithPidOf(String command) throws Exception {

        int procId = -1;

        Runtime r = Runtime.getRuntime();

        Process procPs = null;

        String baseName = new File(command).getName();
        //fix contributed my mikos on 2010.12.10
        procPs = r.exec(new String[] { SHELL_CMD_PIDOF, baseName });
        //procPs = r.exec(SHELL_CMD_PIDOF);

        BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream()));
        String line = null;

        while ((line = reader.readLine()) != null) {

            try {
                //this line should just be the process id
                procId = Integer.parseInt(line.trim());
                break;
            } catch (NumberFormatException e) {
                logException("unable to parse process pid: " + line, e);
            }
        }

        return procId;

    }

    public static int findProcessIdWithPS(String command) throws Exception {

        int procId = -1;

        Runtime r = Runtime.getRuntime();

        Process procPs = null;

        procPs = r.exec(SHELL_CMD_PS);

        BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream()));
        String line = null;

        while ((line = reader.readLine()) != null) {
            if (line.indexOf(' ' + command) != -1) {

                StringTokenizer st = new StringTokenizer(line, " ");
                st.nextToken(); //proc owner

                procId = Integer.parseInt(st.nextToken().trim());

                break;
            }
        }

        return procId;

    }

    public static void logException(String msg, Exception e) {

    }
}