Package com.sun.grid.util.expect

Class Expect

java.lang.Object
com.sun.grid.util.expect.Expect
public class Expect extends Object
Simple helper class for handling output of a process. It works similar as the tcl expect command.

Example

   
    char [] password = null;
    String username = null;
    long timeout = 60 * 1000;
    String [] cmd = new String[] { "su", "username", "-c" , "ls" };

    Expect expect = new Expect(cmd);

    expect.addHandler(new ExpectPasswordHandler("password: ", password));

    expect.addHandler(new ExpectHandler() {

        // print every line after the password question to System.out
        public void handle(Expect expect, ExpectBuffer buffer) {
 
            String line = buffer.consumeLine();
            if(line != null) {
               System.out.println(line);
            } 

        }
    });

    if(expect.exec(timeout) == 0 ) {
       System.out.println("ls as user " + username + " successfully executed");
    }

  • Constructor Summary

    Constructors
    Constructor
    Description
    Expect()
     
    Expect(String[] cmd)
    Creates a new instance of Expect

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    add(ExpectHandler handler)
    Add a new expect handler.
    List
    command()
     
    List
    env()
     
    int
    exec(long timeout)
    Execute the command and call the registered handlers.
    void
    flush()
    Flush stdin
    void
    print(boolean b)
    print a boolean to stdin
    void
    print(char c)
    print a char to stdin.
    void
    print(char[] s)
    print a char arrary to stdin !!!Attention!!!: For security reasons this method should not be used to send passwords to the process, sice the content of s is written to the logger.
    void
    print(double d)
    print a double to stdin
    void
    print(float x)
    print a float to stdin.
    void
    print(int i)
    print an integer to stdin
    void
    print(long l)
    print a long to stdin
    void
    print(Object obj)
    print an object to stdin
    void
    print(String s)
    print a string to stdin
    void
    println()
    print linefeed to stdin.
    void
    println(boolean x)
    print a boolean to stdin (with linefeed)
    void
    println(char x)
    print a char to stdin.
    void
    println(char[] x)
    print a char arrary to stdin (with line feed) !!!Attention!!!: For security reasons this method should not be used to send passwords to the process, sice the content of x is written to the logger.
    void
    println(double x)
    print a double to stdin (with linefeed)
    void
    println(float x)
    print a float to stdin (with linefeed).
    void
    println(int x)
    print an integer to stdin (with linefeed)
    void
    println(long x)
    print a long to stdin (with linefeed)
    void
    println(Object x)
    print an object to stdin (with linefeed)
    void
    println(String x)
    print a string to stdin (with line separator)
    void
    printlnPassword(char[] s)
    print a password to stdin (with linefeed)
    void
    printPassword(char[] s)
    print a password to stdin

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Expect

      public Expect()

    • Expect

      public Expect(String[] cmd)
      Creates a new instance of Expect
      Parameters:
      cmd - the command which will be executed
      See Also:

  • Method Details

    • command

      public List command()

    • env

      public List env()

    • add

      public void add(ExpectHandler handler)
      Add a new expect handler.
      Parameters:
      handler - the expect handler

    • exec

      public int exec(long timeout) throws IOException, InterruptedException
      Execute the command and call the registered handlers.
      Parameters:
      timeout - timout for the command in milliseconds
      Returns:
      the exit code of the command
      Throws:
      IOException - if the execution of the command failed
      InterruptedException - if the current thread has been interrupted before the command has been finished.

    • flush

      public void flush()
      Flush stdin

    • println

      public void println(String x)
      print a string to stdin (with line separator)
      Parameters:
      x - the string

    • print

      public void print(String s)
      print a string to stdin
      Parameters:
      s - the string

    • println

      public void println(Object x)
      print an object to stdin (with linefeed)
      Parameters:
      x - the object

    • print

      public void print(Object obj)
      print an object to stdin
      Parameters:
      obj - the object

    • println

      public void println(int x)
      print an integer to stdin (with linefeed)
      Parameters:
      x - the integer

    • print

      public void print(int i)
      print an integer to stdin
      Parameters:
      i - the integer

    • print

      public void print(boolean b)
      print a boolean to stdin
      Parameters:
      b - the boolean

    • println

      public void println(boolean x)
      print a boolean to stdin (with linefeed)
      Parameters:
      x - the boolean

    • println

      public void println(long x)
      print a long to stdin (with linefeed)
      Parameters:
      x - the long

    • print

      public void print(long l)
      print a long to stdin
      Parameters:
      l - the long

    • println

      public void println(double x)
      print a double to stdin (with linefeed)
      Parameters:
      x - the double

    • println

      public void println(char[] x)
      print a char arrary to stdin (with line feed) !!!Attention!!!: For security reasons this method should not be used to send passwords to the process, sice the content of x is written to the logger.
      Parameters:
      x - the char array

    • print

      public void print(char[] s)
      print a char arrary to stdin !!!Attention!!!: For security reasons this method should not be used to send passwords to the process, sice the content of s is written to the logger.
      Parameters:
      s - the char array

    • printPassword

      public void printPassword(char[] s)
      print a password to stdin
      Parameters:
      s - the password

    • printlnPassword

      public void printlnPassword(char[] s)
      print a password to stdin (with linefeed)
      Parameters:
      s - the password

    • print

      public void print(double d)
      print a double to stdin
      Parameters:
      d - the double

    • println

      public void println(char x)
      print a char to stdin.
      Parameters:
      x - the char

    • print

      public void print(char c)
      print a char to stdin.
      Parameters:
      c - the char

    • println

      public void println(float x)
      print a float to stdin (with linefeed).
      Parameters:
      x - the float

    • print

      public void print(float x)
      print a float to stdin.
      Parameters:
      x - the float

    • println

      public void println()
      print linefeed to stdin.