com.sun.grid.util.expect

Class Expect

java.lang.Object

com.sun.grid.util.expect.Expect

public class Expect
extends java.lang.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 and Description
Expect()
Expect(java.lang.String[] cmd) Creates a new instance of Expect

Method Summary

Methods

Modifier and Type	Method and Description
void	add(ExpectHandler handler) Add a new expect handler.
java.util.List	command()
java.util.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(java.lang.Object obj) print an object to stdin
void	print(java.lang.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(java.lang.Object x) print an object to stdin (with linefeed)
void	println(java.lang.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 Detail

Expect

public Expect()

Expect

public Expect(java.lang.String[] cmd)

Creates a new instance of Expect

Parameters:

cmd - the command which will be executed

See Also:

Runtime.exec(String[])

Method Detail

command

public java.util.List command()

env

public java.util.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 java.io.IOException,
                java.lang.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:

java.io.IOException - if the execution of the command failed

java.lang.InterruptedException - if the current thread has been interrupted before the command has been finished.

flush

public void flush()

Flush stdin

println

public void println(java.lang.String x)

print a string to stdin (with line separator)

Parameters:

x - the string

print

public void print(java.lang.String s)

print a string to stdin

Parameters:

s - the string

println

public void println(java.lang.Object x)

print an object to stdin (with linefeed)

Parameters:

x - the object

print

public void print(java.lang.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.