org.apache.hadoop.hbase.hbtop.screen.top

Class TopScreenView

java.lang.Object

org.apache.hadoop.hbase.hbtop.screen.AbstractScreenView

org.apache.hadoop.hbase.hbtop.screen.top.TopScreenView

All Implemented Interfaces:

ScreenView

@InterfaceAudience.Private
public class TopScreenView
extends AbstractScreenView

The screen that provides a dynamic real-time view for the HBase metrics. This shows the metric Summary and the metric Records. The summary and the metrics are updated periodically (3 seconds by default).

Field Summary

Fields

Modifier and Type	Field and Description
private static int	MESSAGE_ROW
private int	pageSize
private static int	RECORD_HEADER_ROW
private static int	RECORD_START_ROW
private static int	SUMMARY_ROW_NUM
private static int	SUMMARY_START_ROW
private TopScreenPresenter	topScreenPresenter

Constructor Summary

Constructors

Constructor and Description
TopScreenView(Screen screen, Terminal terminal, long initialRefreshDelay, Admin admin, Mode initialMode)

Method Summary

Modifier and Type	Method and Description
private void	clearMessage()
TerminalSize	doResizeIfNecessary()
int	getPageSize()
TerminalSize	getTerminalSize()
ScreenView	handleKeyPress(KeyPress keyPress)
ScreenView	handleTimer()
void	init()
private String	limitLineLength(String line, int length)
private void	showHeaders(List<Header> headers)
private void	showRecords(List<Header> headers, List<Record> records, Record selectedRecord)
private void	showSummary(Summary summary)
void	showTopScreen(Summary summary, List<Header> headers, List<Record> records, Record selectedRecord)
private ScreenView	unknownCommandMessage()
private void	updatePageSize(TerminalSize terminalSize)

Methods inherited from class org.apache.hadoop.hbase.hbtop.screen.AbstractScreenView

cancelTimer, clearTerminal, getScreen, getTerminal, getTerminalPrinter, hideCursor, refreshTerminal, setCursorPosition, setTimer

Methods inherited from class java.lang.Object

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

Field Detail

SUMMARY_START_ROW

private static final int SUMMARY_START_ROW

See Also:

Constant Field Values

SUMMARY_ROW_NUM

private static final int SUMMARY_ROW_NUM

See Also:

Constant Field Values

MESSAGE_ROW

private static final int MESSAGE_ROW

See Also:

Constant Field Values

RECORD_HEADER_ROW

private static final int RECORD_HEADER_ROW

See Also:

Constant Field Values

RECORD_START_ROW

private static final int RECORD_START_ROW

See Also:

Constant Field Values

topScreenPresenter

private final TopScreenPresenter topScreenPresenter

pageSize

private int pageSize

Constructor Detail

TopScreenView

public TopScreenView(Screen screen,
                     Terminal terminal,
                     long initialRefreshDelay,
                     Admin admin,
                     Mode initialMode)

Method Detail

init

public void init()

Specified by:

init in interface ScreenView

Overrides:

init in class AbstractScreenView

handleTimer

public ScreenView handleTimer()

Specified by:

handleTimer in interface ScreenView

Overrides:

handleTimer in class AbstractScreenView

handleKeyPress

@Nullable
public ScreenView handleKeyPress(KeyPress keyPress)

Specified by:

handleKeyPress in interface ScreenView

Overrides:

handleKeyPress in class AbstractScreenView

getTerminalSize

public TerminalSize getTerminalSize()

Overrides:

getTerminalSize in class AbstractScreenView

doResizeIfNecessary

public TerminalSize doResizeIfNecessary()

Overrides:

doResizeIfNecessary in class AbstractScreenView

updatePageSize

private void updatePageSize(TerminalSize terminalSize)

getPageSize

public int getPageSize()

showTopScreen

public void showTopScreen(Summary summary,
                          List<Header> headers,
                          List<Record> records,
                          Record selectedRecord)

showSummary

private void showSummary(Summary summary)

showRecords

private void showRecords(List<Header> headers,
                         List<Record> records,
                         Record selectedRecord)

showHeaders

private void showHeaders(List<Header> headers)

limitLineLength

private String limitLineLength(String line,
                               int length)

clearMessage

private void clearMessage()

unknownCommandMessage

private ScreenView unknownCommandMessage()