Glassfish example source code file (LinuxSystemEnvironment.java)

This example Glassfish source code file (LinuxSystemEnvironment.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

cpu, hashset, hashset, interruptedexception, io, linuxsystemenvironment, linuxsystemenvironment, model, set, set, string, string, sys, systemenvironment, thread, util

The Glassfish LinuxSystemEnvironment.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.enterprise.registration.impl.environment;

// The Service Tags team maintains the latest version of the implementation
// for system environment data collection.  JDK will include a copy of
// the most recent released version for a JDK release.	We rename
// the package to com.sun.servicetag so that the Sun Connection
// product always uses the latest version from the com.sun.scn.servicetags
// package. JDK and users of the com.sun.servicetag API
// (e.g. NetBeans and SunStudio) will use the version in JDK.

import java.io.*;
import java.util.*;

/**
 * Linux implementation of the SystemEnvironment class.
 */
class LinuxSystemEnvironment extends SystemEnvironment {
    LinuxSystemEnvironment() {
        setHostId(getLinuxHostId());

        setSystemModel(getLinuxModel());
        setSystemManufacturer(getLinuxSystemManufacturer());
        setCpuManufacturer(getLinuxCpuManufacturer());
        setSerialNumber(getLinuxSN());
        setPhysMem(getLinuxPhysMem());
        setSockets(getLinuxSockets());
        setCores(getLinuxCores());
        setVirtCpus(getLinuxVirtCpus());
        setCpuName(getLinuxCpuName());
        setClockRate(getLinuxClockRate());
    }
    private String dmiInfo = null;
    private String kstatCpuInfo = null;

    private static final int SN  = 1;
    private static final int SYS = 2;
    private static final int CPU = 3;
    private static final int MODEL = 4;

    private String getLinuxHostId() {
        String output = getCommandOutput("/usr/bin/hostid");
        // trim off the leading 0x
        if (output.startsWith("0x")) {
            output = output.substring(2);
        }
        return output;
    }

    /**
     * Tries to obtain and return the cpu manufacturer.
     * @return The cpu manufacturer (an empty string if not found or an error occurred)
     */
    private String getLinuxCpuManufacturer() {
        String tmp = getLinuxPSNInfo(CPU);
        if (tmp.length() > 0) {
            return tmp;
        }

        String contents = getFileContent("/proc/cpuinfo");
        for (String line : contents.split("\n")) {
            if (line.contains("vendor_id")) {
                String[] ss = line.split(":", 2);
                if (ss.length > 1) {
                    return ss[1].trim();
                }
            }
        }

        // returns an empty string if it can't be found or an error happened
        return getLinuxDMIInfo("dmi type 4", "manufacturer");
    }

    private String getLinuxModel() {
        String tmp = getLinuxPSNInfo(MODEL);
        if (tmp.length() > 0) {
            return tmp + "::" + getCommandOutput("/bin/uname","-v");
        }

        tmp = getLinuxDMIInfo("dmi type 1", "product name");
        if (tmp.length() > 0) {
            return tmp + "::" + getCommandOutput("/bin/uname","-v");
        }

        return getCommandOutput("/bin/uname","-i")
            + "::" + getCommandOutput("/bin/uname","-v");
    }


    /**
     * Tries to obtain and return the system manufacturer.
     * @return The system manufacturer (an empty string if not found or an error occurred)
     */
    private String getLinuxSystemManufacturer() {
        String tmp = getLinuxPSNInfo(SYS);
        if (tmp.length() > 0) {
            return tmp;
        }

        // returns an empty string if it can't be found or an error happened
        return getLinuxDMIInfo("dmi type 1", "manufacturer");
    }

    /**
     * Tries to obtain and return the serial number of the system.
     * @return The serial number (an empty string if not found or an error occurred)
     */
    private String getLinuxSN() {
        String tmp = getLinuxPSNInfo(SN);
        if (tmp.length() > 0) {
            return tmp;
        }

        // returns an empty string if it can't be found or an error happened
        return getLinuxDMIInfo("dmi type 1", "serial number");
    }

    private String getLinuxPSNInfo(int target) {
        // try to read from the psn file if it exists
        String contents = getFileContent("/var/run/psn");
        String[] ss = contents.split("\n");
        if (target <= ss.length) {
            return ss[target-1];
        }

        // default case is to return ""
        return "";
    }

    // reads from dmidecode with the given type and target
    // returns an empty string if nothing was found or an error occurred
    // 
    // Sample output segment:
    // Handle 0x0001
    //         DMI type 1, 25 bytes.
    //         System Information
    //                 Manufacturer: System manufacturer
    //                 Product Name: System Product Name
    //                 Version: System Version
    //                 Serial Number: System Serial Number
    //                 UUID: 3091D719-B25B-D911-959D-6D1B12C7686E
    //                 Wake-up Type: Power Switch

    private synchronized String getLinuxDMIInfo(String dmiType, String target) {
        // only try to get dmidecode information once, after that, we can
        // reuse the output
        if (dmiInfo == null) {
            Thread dmidecodeThread = new Thread() {
                public void run() {
                    dmiInfo = getCommandOutput("/usr/sbin/dmidecode");
                }
            };
            dmidecodeThread.start();

            try {
                dmidecodeThread.join(3000);
                if (dmidecodeThread.isAlive()) {
                    dmidecodeThread.interrupt();
                    dmiInfo = "";
                }
            } catch (InterruptedException ie) {
                dmidecodeThread.interrupt();
            }
        }

        if (dmiInfo.length() == 0) {
            return "";
        }
        boolean dmiFlag = false;
        for (String s : dmiInfo.split("\n")) {
            String line = s.toLowerCase();
            if (dmiFlag) {
                if (line.contains(target)) {
                    String key = target + ":";
                    int indx = line.indexOf(key) + key.length();
                    if (line.contains(key) && indx < line.length()) {
                        return line.substring(indx).trim();
                    }
                    String[] ss = line.split(":"); 
                    return ss[ss.length-1];
                }
            } else if (line.contains(dmiType)) {
                dmiFlag = true;
            }
        }
        return "";
    }

    private String getLinuxClockRate() {
        String contents = getFileContent("/proc/cpuinfo");
        String token = "cpu MHz";
        for (String line : contents.split("\n")) {
            if (line.contains(token)) {
                String[] key = line.split(":", 2);
                if (key.length > 1) {
                    return key[1].trim();
                }
            }
        }
        return "";
    }

    private String getLinuxCpuName() {
        String contents = getFileContent("/proc/cpuinfo");
        String token = "model name";
        for (String line : contents.split("\n")) {
            if (line.contains(token)) {
                String[] key = line.split(":", 2);
                if (key.length > 1) {
                    return key[1].trim();
                }
            }
        }
        return "";
    }

    private String getLinuxVirtCpus() {
        Set<String> set = new HashSet();
        String contents = getFileContent("/proc/cpuinfo");
        String token = "processor";
        for (String line : contents.split("\n")) {
            if (line.contains(token)) {
                String[] key = line.split(":", 2);
                if (key.length > 1) {
                    set.add(key[1].trim());
                }
            }
        }
        return "" + set.size();
    }

    private String getLinuxCores() {
        Set<String> set = new HashSet();
        String contents = getFileContent("/proc/cpuinfo");
        String token = "core id";
        for (String line : contents.split("\n")) {
            if (line.contains(token)) {
                String[] key = line.split(":", 2);
                if (key.length > 1) {
                    set.add(key[1].trim());
                }
            }
        }
        if (set.size() == 0) {
            return "1";
        }
        return "" + set.size();
    }

    private String getLinuxPhysMem() {
        String contents = getFileContent("/proc/meminfo");
        for (String line : contents.split("\n")) {
            if (line.contains("MemTotal")) {
                String[] total = line.split(":", 2);
                if (total.length > 1) {
                    String[] mem = total[1].trim().split(" ");
                    if (mem.length >= 1) {
                        return mem[0].trim();
                    } else {
                        return total[1].trim();
                    }
                }
            }
        }

        return "0";
    }

    private String getLinuxSockets() {
        Set<String> physIdSet = new HashSet();
        Set<String> procSet = new HashSet();
        String contents = getFileContent("/proc/cpuinfo");
        String physIdToken = "physical id";
        String procToken = "processor";

        for (String line : contents.split("\n")) {
            if (line.contains(physIdToken)) {
                String[] key = line.split(":", 2);
                if (key.length > 1) {
                    physIdSet.add(key[1].trim());
                }
            }

            if (line.contains(procToken)) {
                String[] key = line.split(":", 2);
                if (key.length > 1) {
                    procSet.add(key[1].trim());
                }
            }
        }
        if (physIdSet.size() != 0) {
            return "" + physIdSet.size();
        }
        return "" + procSet.size();
    }
}