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

Constructors
Constructor and Description
`Expect()`
`Expect(java.lang.String[] cmd)` Creates a new instance of Expect

Method Summary

All Methods Instance Methods Concrete 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.

Class Expect

Example

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Expect

Expect

Method Detail

command

env

add

exec

flush

println

print

println

print

println

print

print

println

println

print

println

println

print

printPassword

printlnPassword

print

println

print

println

print

println