com.dalsemi.shell.server.serial
Class SerialSession

java.lang.Object
  |
  +--java.lang.Thread
        |
        +--com.dalsemi.shell.server.Session
              |
              +--com.dalsemi.shell.server.serial.SerialSession

public class SerialSession

extends Session

This class encapsulates all functionality for a Serial session. The Serial server listens to the serial port connection requests. When someone attempts to start a Serial session, the server spins off a session (an instance of this class) to handle that session. The session allows you to log into the system, then handles the communication between the user and the TINI system.

Inner classes inherited from class com.dalsemi.shell.server.Session

Session.Login

Fields inherited from class com.dalsemi.shell.server.Session

commandHistory, CURRENT_COMMAND, CURRENT_DIRECTORY, currentCommand, environment, err, in, inCommand, lastCommand, loginStack, myThreadID, out, paramsArray, paramsVector, password, prompt, PROMPT, retArray, server, shutdown, userName, welcomeMessage

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Method Summary

protected void	currentCommandFinished() Called after each command is completed.
protected void	exceptionThrown(Exception ex) Called when an exception is thrown in a command.
String	getNextCommand() Gets the next command from the underlying session's input stream.
void	login() Logs the user into the system.
protected void	sessionEnding() Cleans up when the session is ending.
void	updatePrompt(String withThis) This method was added to speed up prompt printing.

Methods inherited from class com.dalsemi.shell.server.Session

addToHistory, broadcast, endSession, execute, forceEndSession, getEnvironment, getErrStream, getFromEnvironment, getHistoryNumber, getOutputStream, getParams, getUserName, inCommand, parseLogin, printHistory, run, stepDownHistory, stepUpHistory, su

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getName, getPriority, getThreadGroup, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Method Detail

login

public void login()
           throws IOException

Logs the user into the system. This function will prompt the user for username and password.

Overrides:

login in class Session

sessionEnding

protected void sessionEnding()

Cleans up when the session is ending. (i.e. the user typed "exit", or something bad happened that caused the session to terminate.) Also resumes the Serial server so new connections will be accepted.

Overrides:

sessionEnding in class Session

currentCommandFinished

protected void currentCommandFinished()

Called after each command is completed. For example, the user types "ls". The command is received and parsed, then the appropriate command is called in the shell. Finally, we need to again display the system prompt.

Overrides:

currentCommandFinished in class Session

updatePrompt

public void updatePrompt(String withThis)

This method was added to speed up prompt printing. It is called when the prompt needs to change because the user changed directory.

Overrides:

updatePrompt in class Session

Parameters:

withThis - the current directory

exceptionThrown

protected void exceptionThrown(Exception ex)

Called when an exception is thrown in a command. This function will attempt to notify the user. Any exceptions raised specifically by shell commands should try to give as descriptive a message to the exception as possible.

Overrides:

exceptionThrown in class Session

Parameters:

ex - The exception thrown.

getNextCommand

public String getNextCommand()
                      throws IOException

Gets the next command from the underlying session's input stream. This effectively performs functionality like a readLine(), but gives the stream a chance to parse the incoming data (to take care of backspace events, etc.)

Overrides:

getNextCommand in class Session

Returns:

the next command from the input stream