Package 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

@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	Description
private static final int	MESSAGE_ROW
private Integer	pageSize
private static final int	RECORD_HEADER_ROW
private static final int	RECORD_START_ROW
private static final int	SUMMARY_ROW_NUM
private static final int	SUMMARY_START_ROW
private final TopScreenPresenter	topScreenPresenter

Constructor Summary

Constructors

Constructor	Description
TopScreenView(Screen screen, Terminal terminal, long initialRefreshDelay, Admin admin, Mode initialMode, List<Field> initialFields, Field initialSortField, Boolean initialAscendingSort, List<RecordFilter> initialFilters, long numberOfIterations)

Method Summary

Modifier and Type	Method	Description
private void	clearMessage()
TerminalSize	doResizeIfNecessary()
Integer	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 Details

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 Integer pageSize

Constructor Details

TopScreenView

public TopScreenView(Screen screen,
 Terminal terminal,
 long initialRefreshDelay,
 Admin admin,
 Mode initialMode,
 @Nullable
 List<Field> initialFields,
 @Nullable
 Field initialSortField,
 @Nullable
 Boolean initialAscendingSort,
 @Nullable
 List<RecordFilter> initialFilters,
 long numberOfIterations)

Method Details

init

public void init()

Specified by:

init in interface ScreenView

Overrides:

init in class AbstractScreenView

handleTimer

@Nullable
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

@Nullable
public TerminalSize getTerminalSize()

Overrides:

getTerminalSize in class AbstractScreenView

doResizeIfNecessary

@Nullable
public TerminalSize doResizeIfNecessary()

Overrides:

doResizeIfNecessary in class AbstractScreenView

updatePageSize

private void updatePageSize(TerminalSize terminalSize)

getPageSize

@Nullable
public Integer 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()