org.apache.hadoop.hbase.hbtop.terminal.impl

Class TerminalImpl

java.lang.Object

org.apache.hadoop.hbase.hbtop.terminal.impl.TerminalImpl

All Implemented Interfaces:

Closeable, AutoCloseable, Terminal

@InterfaceAudience.Private
public class TerminalImpl
extends Object
implements Terminal

An implementation of the Terminal interface for normal display mode. This implementation produces output intended for human viewing. In particular, it only displays one screenful of data. The output contains some escape sequences for formatting.

Field Summary

Fields

Modifier and Type	Field and Description
private TerminalSize	cachedTerminalSize
private KeyPressGenerator	keyPressGenerator
private Queue<KeyPress>	keyPressQueue
private static org.slf4j.Logger	LOGGER
private PrintWriter	output
private ScreenBuffer	screenBuffer

Constructor Summary

Constructors

Constructor and Description
TerminalImpl()
TerminalImpl(String title)

Method Summary

Modifier and Type	Method and Description
void	clear()
void	close()
TerminalSize	doResizeIfNecessary()
private String	doStty(String sttyOptionsString)
CursorPosition	getCursorPosition()
TerminalSize	getSize()
TerminalPrinter	getTerminalPrinter(int startRow)
void	hideCursor()
KeyPress	pollKeyPress()
private TerminalSize	queryTerminalSize()
void	refresh()
void	setCursorPosition(int column, int row)
private void	setTitle(String title)
private void	sttyCooked()
private void	sttyRaw()
private void	updateTerminalSize(int columns, int rows)

Methods inherited from class java.lang.Object

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

Field Detail

LOGGER

private static final org.slf4j.Logger LOGGER

cachedTerminalSize

private TerminalSize cachedTerminalSize

output

private final PrintWriter output

screenBuffer

private final ScreenBuffer screenBuffer

keyPressQueue

private final Queue<KeyPress> keyPressQueue

keyPressGenerator

private final KeyPressGenerator keyPressGenerator

Constructor Detail

TerminalImpl

public TerminalImpl()

TerminalImpl

public TerminalImpl(@Nullable
                    String title)

Method Detail

setTitle

private void setTitle(String title)

updateTerminalSize

private void updateTerminalSize(int columns,
                                int rows)

clear

public void clear()

Specified by:

clear in interface Terminal

refresh

public void refresh()

Specified by:

refresh in interface Terminal

getSize

public TerminalSize getSize()

Specified by:

getSize in interface Terminal

doResizeIfNecessary

@Nullable
public TerminalSize doResizeIfNecessary()

Specified by:

doResizeIfNecessary in interface Terminal

pollKeyPress

@Nullable
public KeyPress pollKeyPress()

Specified by:

pollKeyPress in interface Terminal

getCursorPosition

public CursorPosition getCursorPosition()

Specified by:

getCursorPosition in interface Terminal

setCursorPosition

public void setCursorPosition(int column,
                              int row)

Specified by:

setCursorPosition in interface Terminal

hideCursor

public void hideCursor()

Specified by:

hideCursor in interface Terminal

getTerminalPrinter

public TerminalPrinter getTerminalPrinter(int startRow)

Specified by:

getTerminalPrinter in interface Terminal

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

queryTerminalSize

private TerminalSize queryTerminalSize()

sttyRaw

private void sttyRaw()

sttyCooked

private void sttyCooked()

doStty

private String doStty(String sttyOptionsString)