edu.clemson.cs.nestbed.server.util.UsbDeviceInformation.java Source code

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Here is the source code for edu.clemson.cs.nestbed.server.util.UsbDeviceInformation.java

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/* $Id$ */
/*
 * UsbDeviceInformation.java
 *
 * Network Embedded Sensor Testbed (NESTbed)
 *
 * Copyright (C) 2006-2007
 * Dependable Systems Research Group
 * School of Computing
 * Clemson University
 * Andrew R. Dalton and Jason O. Hallstrom
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the
 *
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301, USA.
 */
package edu.clemson.cs.nestbed.server.util;

import java.io.File;
import java.io.IOException;
import java.util.Properties;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class UsbDeviceInformation {
    private final static Log log = LogFactory.getLog(UsbDeviceInformation.class);
    private final static String GET_DEV_INFO;

    static {
        String property = "nestbed.bin.get_dev_info";
        String getDevInfo = System.getProperty(property);

        if ((getDevInfo == null) || !(new File(getDevInfo).exists())) {
            log.fatal("Property '" + property + "' is not set " + " or file does not exist: " + getDevInfo);
            //tmp
            //System.exit(1);
            getDevInfo = null;
        }
        GET_DEV_INFO = getDevInfo;
        log.info(property + " = " + GET_DEV_INFO);
    }

    private String moteSerialID;
    private int bus;
    private int device;
    private int port;

    public UsbDeviceInformation(String moteSerialID) {
        this.moteSerialID = moteSerialID;
        updateInternal();
    }

    public int getBus() {
        return bus;
    }

    public int getDevice() {
        return device;
    }

    public int getPort() {
        return port;
    }

    public void update() {
        updateInternal();
    }

    private void updateInternal() {
        ProcessBuilder processBuilder;
        Process process;
        int exitValue;

        // tmp
        //if (GET_DEV_INFO == null) return;

        try {
            //processBuilder = new ProcessBuilder(GET_DEV_INFO, "-s", moteSerialID);
            processBuilder = new ProcessBuilder("/usr/bin/sudo", GET_DEV_INFO, "-s", moteSerialID);
            process = processBuilder.start();

            process.waitFor();
            exitValue = process.exitValue();

            if (exitValue == 0) {
                Properties p = new Properties();
                p.load(process.getInputStream());

                String busString = p.getProperty("bus");
                String deviceString = p.getProperty("device");
                String portString = p.getProperty("port");

                log.debug("busString    = " + busString);
                log.debug("deviceString = " + deviceString);
                log.debug("portString   = " + portString);

                if ((busString != null) && (deviceString != null) && (portString != null)) {
                    try {
                        bus = Integer.parseInt(busString);
                        device = Integer.parseInt(deviceString);
                        port = Integer.parseInt(portString);
                    } catch (NumberFormatException ex) {
                        log.error("Error converting string to int", ex);
                    }
                } else {
                    log.error("Required property not set");
                }
            } else {
                log.error("Unable to get USB device information for " + "moteSerialID: " + moteSerialID);
            }
        } catch (InterruptedException ex) {
            log.error("Process interrupted", ex);
        } catch (IOException ex) {
            log.error("I/O Exception occured while reading device info", ex);
        }
    }
}