Package org.jgroups.demos
Class Draw
java.lang.Object
org.jgroups.ExtendedReceiverAdapter
org.jgroups.demos.Draw
- All Implemented Interfaces:
ActionListener
,EventListener
,ChannelListener
,ExtendedMembershipListener
,ExtendedMessageListener
,ExtendedReceiver
,MembershipListener
,MessageListener
,Receiver
Shared whiteboard, each new instance joins the same group. Each instance chooses a random color,
mouse moves are broadcast to all group members, which then apply them to their canvas
- Author:
- Bela Ban, Oct 17 2001
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
void
block()
Called (usually by the FLUSH protocol), as an indication that the member should stop sending messages.void
channelClosed
(Channel channel) void
channelConnected
(Channel channel) void
channelDisconnected
(Channel channel) void
channelReconnected
(Address addr) void
void
byte[]
getState()
Answers the group state; e.g., when joining.void
getState
(OutputStream ostream) Allows an application to write a state through a provided OutputStream.void
go()
static void
void
Called when a message is received.void
void
setGroupName
(String groupname) void
setState
(byte[] state) Sets the group state; e.g., when joining.void
setState
(InputStream istream) Allows an application to read a state through a provided InputStream.void
stop()
void
unblock()
Called after the FLUSH protocol has unblocked previously blocked senders, and messages can be sent again.void
viewAccepted
(View v) Called when a change in membership has occurred.
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Constructor Details
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Method Details
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getGroupName
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setGroupName
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main
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go
- Throws:
Exception
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receive
Description copied from interface:MessageListener
Called when a message is received.- Specified by:
receive
in interfaceMessageListener
- Overrides:
receive
in classExtendedReceiverAdapter
- Parameters:
msg
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viewAccepted
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
- Overrides:
viewAccepted
in classExtendedReceiverAdapter
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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
- Overrides:
block
in classExtendedReceiverAdapter
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unblock
public void unblock()Description copied from interface:ExtendedMembershipListener
Called after the FLUSH protocol has unblocked previously blocked senders, and messages can be sent again. This callback only needs to be implemented if we require a notification of that.- Specified by:
unblock
in interfaceExtendedMembershipListener
- Overrides:
unblock
in classExtendedReceiverAdapter
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getState
public byte[] getState()Description copied from interface:MessageListener
Answers the group state; e.g., when joining.- Specified by:
getState
in interfaceMessageListener
- Overrides:
getState
in classExtendedReceiverAdapter
- Returns:
- byte[]
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setState
public void setState(byte[] state) Description copied from interface:MessageListener
Sets the group state; e.g., when joining.- Specified by:
setState
in interfaceMessageListener
- Overrides:
setState
in classExtendedReceiverAdapter
- Parameters:
state
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getState
Description copied from interface:ExtendedMessageListener
Allows an application to write a state through a provided OutputStream. An application is obligated to always close the given OutputStream reference.- Specified by:
getState
in interfaceExtendedMessageListener
- Overrides:
getState
in classExtendedReceiverAdapter
- Parameters:
ostream
- the OutputStream- See Also:
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setState
Description copied from interface:ExtendedMessageListener
Allows an application to read a state through a provided InputStream. An application is obligated to always close the given InputStream reference.- Specified by:
setState
in interfaceExtendedMessageListener
- Overrides:
setState
in classExtendedReceiverAdapter
- Parameters:
istream
- the InputStream- See Also:
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clearPanel
public void clearPanel() -
sendClearPanelMsg
public void sendClearPanelMsg() -
actionPerformed
- Specified by:
actionPerformed
in interfaceActionListener
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stop
public void stop() -
channelConnected
- Specified by:
channelConnected
in interfaceChannelListener
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channelDisconnected
- Specified by:
channelDisconnected
in interfaceChannelListener
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channelClosed
- Specified by:
channelClosed
in interfaceChannelListener
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channelShunned
public void channelShunned()- Specified by:
channelShunned
in interfaceChannelListener
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channelReconnected
- Specified by:
channelReconnected
in interfaceChannelListener
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