Java Code for Operating System Properties

The following is example of a java code which is getting some basic Operating System properties of a linux server.It gets host name, operating system name, kernel version and CPU architecture values, then writes them on a mysql database. I hope this helps anyone interested in systems management coding in java.

import java.sql.*;

import java.io.*;

public class GetLinuxProperties {

public static String getHostname() {

int ch;

String MemStr = "";

try {

String[] LinuxCommand = {"/bin/sh","-c","hostname"};

Process LinuxProcess = Runtime.getRuntime().exec(LinuxCommand);

InputStreamReader CSR = new InputStreamReader(LinuxProcess.getInputStream());

while ((ch = CSR.read()) != -1) {

MemStr = MemStr+(char)ch;

}

} catch (IOException anIOException) {

System.out.println(anIOException);

}

return MemStr;

}

public static String getOSname() {

int ch;

String MemStr = "";

try {

String[] LinuxCommand = {"/bin/sh","-c","cat /etc/redhat-release"};

Process LinuxProcess = Runtime.getRuntime().exec(LinuxCommand);

InputStreamReader CSR = new InputStreamReader(LinuxProcess.getInputStream());

while ((ch = CSR.read()) != -1) {

MemStr = MemStr+(char)ch;

}

} catch (IOException anIOException) {

System.out.println(anIOException);

}

return MemStr;

}

public static String getkVersion() {

int ch;

String MemStr = "";

try {

String[] LinuxCommand = {"/bin/sh","-c","uname -r"};

Process LinuxProcess = Runtime.getRuntime().exec(LinuxCommand);

InputStreamReader CSR = new InputStreamReader(LinuxProcess.getInputStream());

while ((ch = CSR.read()) != -1) {

MemStr = MemStr+(char)ch;

}

} catch (IOException anIOException) {

System.out.println(anIOException);

}

return MemStr;

}

public static String getcpuA() {

int ch;

String MemStr = "";

try {

String[] LinuxCommand = {"/bin/sh","-c","uname -p"};

Process LinuxProcess = Runtime.getRuntime().exec(LinuxCommand);

InputStreamReader CSR = new InputStreamReader(LinuxProcess.getInputStream());

while ((ch = CSR.read()) != -1) {

MemStr = MemStr+(char)ch;

}

} catch (IOException anIOException) {

System.out.println(anIOException);

}

return MemStr;

}

public static String getmTime() {

int ch;

String MemStr = "";

try {

String[] LinuxCommand = {"/bin/sh","-c","date '+%d-%m-%Y %H:%M:%S'"};

Process LinuxProcess = Runtime.getRuntime().exec(LinuxCommand);

InputStreamReader CSR = new InputStreamReader(LinuxProcess.getInputStream());

while ((ch = CSR.read()) != -1) {

MemStr = MemStr+(char)ch;

}

} catch (IOException anIOException) {

System.out.println(anIOException);

}

return MemStr;

}

public static void main(String[] args) {

String hName;

String osName;

String kVersion;

String cpuA;

String mTime;

Connection conn = null;

String url = "jdbc:mysql://server_ip:3306/";

String dbName = "db_name";

String driver = "com.mysql.jdbc.Driver";

String userName = "username";

String password = "password";

hName = getHostname();

osName = getOSname();

kVersion = getkVersion();

cpuA = getcpuA();

mTime = getmTime();

try {

Class.forName(driver).newInstance();

conn = DriverManager.getConnection(url+dbName,userName,password);

System.out.println("Connected to the database");

Statement stCount = conn.createStatement();

String selServers = "select count(*) as rowcount FROM servers where server_name = \'" + hName + "\'";

ResultSet rsCount = stCount.executeQuery(selServers);

rsCount.next();

int numRows = rsCount.getInt("rowcount") ;

rsCount.close();

System.out.println("servers table has " + numRows + " row(s).");

int count;

if (numRows == 0 ) {

String insServers = "insert into servers (server_name, operating_system, kernel_version, cpu_architecture, modification_date) values (\"" + hName + "\",\"" + osName + "\",\"" + kVersion + "\",\"" + cpuA + "\",STR_TO_DATE(\'" + mTime + "\',\'%d-%m-%Y %H:%i:%S\'))";

Statement stIns = conn.createStatement();

count = stIns.executeUpdate(insServers);

stIns.close ();

System.out.println (count + " rows were inserted");

} else {

String updServers = "update servers set server_name = \'" + hName + "\', operating_system = \'" + osName + "\', kernel_version = \'" + kVersion + "\', cpu_architecture = \'" + cpuA + "\', modification_date = STR_TO_DATE(\'" + mTime + "\',\'%d-%m-%Y %H:%i:%S\') " + " where server_name = \'" + hName + "\'";

Statement stUpd = conn.createStatement();

count = stUpd.executeUpdate(updServers);

stUpd.close();

System.out.println (count + " rows were updated");

}

conn.close();

System.out.println("Disconnected from database");

} catch (Exception e) {

e.printStackTrace();

}

}

}