Package org.jgroups.demos
Class Topology
- java.lang.Object
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- java.awt.Component
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- java.awt.Container
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- java.awt.Window
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- java.awt.Frame
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- org.jgroups.demos.Topology
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- All Implemented Interfaces:
java.awt.event.WindowListener
,java.awt.image.ImageObserver
,java.awt.MenuContainer
,java.io.Serializable
,java.util.EventListener
,javax.accessibility.Accessible
,MembershipListener
public class Topology extends java.awt.Frame implements java.awt.event.WindowListener, MembershipListener
Demonstrates the membership service. Each member is represented by a rectangle that contains the addresses of all the members. The coordinator (= oldest member in the group) is painted in blue. New members can be started; all existing members will update their graphical appearance to reflect the new membership. When the coordinator itself is killed, another one will take over (the next in rank).A nice demo is to start a number of Topology instances at the same time. All of them will be blue (all are coordinators since they don't find each other). Then the MERGE2 protocol sets in and only one will retain its coordinator role.
- Author:
- Bela Ban
- See Also:
- Serialized Form
- To do:
- Needs to be ported to Swing.
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Field Summary
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Fields inherited from class java.awt.Frame
CROSSHAIR_CURSOR, DEFAULT_CURSOR, E_RESIZE_CURSOR, HAND_CURSOR, ICONIFIED, MAXIMIZED_BOTH, MAXIMIZED_HORIZ, MAXIMIZED_VERT, MOVE_CURSOR, N_RESIZE_CURSOR, NE_RESIZE_CURSOR, NORMAL, NW_RESIZE_CURSOR, S_RESIZE_CURSOR, SE_RESIZE_CURSOR, SW_RESIZE_CURSOR, TEXT_CURSOR, W_RESIZE_CURSOR, WAIT_CURSOR
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Constructor Summary
Constructors Constructor Description Topology()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description void
addNode(java.lang.Object member)
void
block()
Called (usually by the FLUSH protocol), as an indication that the member should stop sending messages.void
coordinatorChosen()
void
drawNode(java.awt.Graphics g, int x, int y, java.lang.String label, int style)
void
drawTopology(java.awt.Graphics g)
static void
main(java.lang.String[] args)
void
paint(java.awt.Graphics g)
void
removeNode(java.lang.Object member)
void
setState(java.util.Vector mbrs)
void
start()
void
suspect(Address suspected_mbr)
Called whenever a member is suspected of having crashed, but has not yet been excluded.void
viewAccepted(View view)
Called when a change in membership has occurred.void
windowActivated(java.awt.event.WindowEvent e)
void
windowClosed(java.awt.event.WindowEvent e)
void
windowClosing(java.awt.event.WindowEvent e)
void
windowDeactivated(java.awt.event.WindowEvent e)
void
windowDeiconified(java.awt.event.WindowEvent e)
void
windowIconified(java.awt.event.WindowEvent e)
void
windowOpened(java.awt.event.WindowEvent e)
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Methods inherited from class java.awt.Frame
addNotify, getAccessibleContext, getCursorType, getExtendedState, getFrames, getIconImage, getMaximizedBounds, getMenuBar, getState, getTitle, isResizable, isUndecorated, paramString, remove, removeNotify, setBackground, setCursor, setExtendedState, setIconImage, setMaximizedBounds, setMenuBar, setOpacity, setResizable, setShape, setState, setTitle, setUndecorated
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Methods inherited from class java.awt.Window
addPropertyChangeListener, addPropertyChangeListener, addWindowFocusListener, addWindowListener, addWindowStateListener, applyResourceBundle, applyResourceBundle, createBufferStrategy, createBufferStrategy, dispose, getBackground, getBufferStrategy, getFocusableWindowState, getFocusCycleRootAncestor, getFocusOwner, getFocusTraversalKeys, getIconImages, getInputContext, getListeners, getLocale, getModalExclusionType, getMostRecentFocusOwner, getOpacity, getOwnedWindows, getOwner, getOwnerlessWindows, getShape, getToolkit, getType, getWarningString, getWindowFocusListeners, getWindowListeners, getWindows, getWindowStateListeners, hide, isActive, isAlwaysOnTop, isAlwaysOnTopSupported, isAutoRequestFocus, isFocusableWindow, isFocusCycleRoot, isFocused, isLocationByPlatform, isOpaque, isShowing, isValidateRoot, pack, postEvent, processEvent, processWindowEvent, processWindowFocusEvent, processWindowStateEvent, removeWindowFocusListener, removeWindowListener, removeWindowStateListener, reshape, setAlwaysOnTop, setAutoRequestFocus, setBounds, setBounds, setCursor, setFocusableWindowState, setFocusCycleRoot, setIconImages, setLocation, setLocation, setLocationByPlatform, setLocationRelativeTo, setMinimumSize, setModalExclusionType, setSize, setSize, setType, setVisible, show, toBack, toFront
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Methods inherited from class java.awt.Container
add, add, add, add, add, addContainerListener, addImpl, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalPolicy, getInsets, getLayout, getMaximumSize, getMinimumSize, getMousePosition, getPreferredSize, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, print, printComponents, processContainerEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusTraversalKeys, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setFont, setLayout, transferFocusDownCycle, update, validate, validateTree
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Methods inherited from class java.awt.Component
action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBaseline, getBaselineResizeBehavior, getBounds, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocation, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, requestFocusInWindow, resize, resize, revalidate, setComponentOrientation, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeysEnabled, setForeground, setIgnoreRepaint, setLocale, setMaximumSize, setMixingCutoutShape, setName, setPreferredSize, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle
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Method Detail
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addNode
public void addNode(java.lang.Object member)
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removeNode
public void removeNode(java.lang.Object member)
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drawNode
public void drawNode(java.awt.Graphics g, int x, int y, java.lang.String label, int style)
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drawTopology
public void drawTopology(java.awt.Graphics g)
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paint
public void paint(java.awt.Graphics g)
- Overrides:
paint
in classjava.awt.Window
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viewAccepted
public void viewAccepted(View view)
Description copied from interface:MembershipListener
Called when a change in membership has occurred. No long running actions or sending of messages should be done in this callback. If some long running action needs to be performed, it should be done in a separate thread. Note that on reception of the first view (a new member just joined), the channel will not yet be in the connected state. This only happens whenChannel.connect(String)
returns.- Specified by:
viewAccepted
in interfaceMembershipListener
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suspect
public void suspect(Address suspected_mbr)
Description copied from interface:MembershipListener
Called whenever a member is suspected of having crashed, but has not yet been excluded.- Specified by:
suspect
in interfaceMembershipListener
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block
public void block()
Description copied from interface:MembershipListener
Called (usually by the FLUSH protocol), as an indication that the member should stop sending messages. Any messages sent after returning from this callback might get blocked by the FLUSH protocol. When the FLUSH protocol is done, and messages can be sent again, the FLUSH protocol will simply unblock all pending messages. If a callback for unblocking is desired, implementExtendedMembershipListener.unblock()
. Note that block() is the equivalent of reception of a BlockEvent in the pull mode.- Specified by:
block
in interfaceMembershipListener
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setState
public void setState(java.util.Vector mbrs)
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coordinatorChosen
public void coordinatorChosen()
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windowActivated
public void windowActivated(java.awt.event.WindowEvent e)
- Specified by:
windowActivated
in interfacejava.awt.event.WindowListener
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windowClosed
public void windowClosed(java.awt.event.WindowEvent e)
- Specified by:
windowClosed
in interfacejava.awt.event.WindowListener
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windowClosing
public void windowClosing(java.awt.event.WindowEvent e)
- Specified by:
windowClosing
in interfacejava.awt.event.WindowListener
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windowDeactivated
public void windowDeactivated(java.awt.event.WindowEvent e)
- Specified by:
windowDeactivated
in interfacejava.awt.event.WindowListener
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windowDeiconified
public void windowDeiconified(java.awt.event.WindowEvent e)
- Specified by:
windowDeiconified
in interfacejava.awt.event.WindowListener
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windowIconified
public void windowIconified(java.awt.event.WindowEvent e)
- Specified by:
windowIconified
in interfacejava.awt.event.WindowListener
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windowOpened
public void windowOpened(java.awt.event.WindowEvent e)
- Specified by:
windowOpened
in interfacejava.awt.event.WindowListener
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start
public void start() throws java.lang.Exception
- Throws:
java.lang.Exception
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main
public static void main(java.lang.String[] args)
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