After call proc.waitFor();. My process is hang.
Dear sir
I stuck to this trap for a few day. And don't know why my code not work.
I want to shutdown mysql server by execute command
"mysqladmin -u root -p shutdown"
after call this command I must provide password.
But after I wrote outputstream to Process. It HANG! (Do nothing and still in task manager)
Can you help me?
This is my code
==========================================================================
String[] cmd = new String[3];
cmd[0] = "cmd.exe" ;
cmd[1] = "/C" ;
cmd[2] = "mysqladmin -u root -p shutdown";
Runtime rt = Runtime.getRuntime();
System.out.println("Executing " + cmd[0] + " " + cmd[1] + " " + cmd[2]);
Process proc = rt.exec(cmd);
// get message
StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream(), "ERROR");
StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream(), "OUTPUT");
errorGobbler.start();
outputGobbler.start();
Thread.sleep(500);
OutputStream output = proc.getOutputStream();
PrintWriter outputWriter = new PrintWriter(new OutputStreamWriter(output));
outputWriter.println("password");
outputWriter.flush();
outputWriter.close();
// any error?
int exitVal = proc.waitFor();
System.out.println("ExitValue: " + exitVal);
import java.util.*;
import java.io.*;
public class StreamGobbler extends Thread
{
InputStream is;
OutputStream out;
String type;
String cmd;
// Send next command
StreamGobbler(OutputStream out, String cmd)
{
this.out = out;
this.type = "INPUT";
this.cmd = cmd;
}
// Show result
StreamGobbler(InputStream is, String type)
{
this.is = is;
this.type = type;
}
public void run()
{
try
{
// Send next command
if (type.equals("INPUT")){
PrintWriter outputWriter = new PrintWriter(new OutputStreamWriter(out));
outputWriter.println(cmd);
outputWriter.flush();
outputWriter.close();
// Show dos result
} else {
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line=null;
while ( (line = br.readLine()) != null)
if (line.length() > 0)
{
System.out.println(line);
}
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
