java.lang.Object
org.jgroups.stack.Protocol
org.jgroups.protocols.VIEW_SYNC
- public class VIEW_SYNC
- extends org.jgroups.stack.Protocol
Periodically sends the view to the group. When a view is received which is greater than the current view, we
install it. Otherwise we simply discard it. This is used to solve the problem for unreliable view
dissemination outlined in JGroups/doc/ReliableViewInstallation.txt. This protocol is supposed to be just below GMS.
- Version:
- $Id: VIEW_SYNC.java,v 1.4 2005/10/27 08:30:14 belaban Exp $
| Fields inherited from class org.jgroups.stack.Protocol |
down_handler, down_prot, down_queue, down_thread, down_thread_prio, log, observer, props, stack, stats, trace, up_handler, up_prot, up_queue, up_thread, up_thread_prio, warn |
| Methods inherited from class org.jgroups.stack.Protocol |
destroy, downThreadEnabled, dumpStats, enableStats, getDownProtocol, getDownQueue, getProperties, getUpProtocol, getUpQueue, handleSpecialDownEvent, init, isTrace, isWarn, passDown, passUp, printStats, providedDownServices, providedUpServices, receiveDownEvent, receiveUpEvent, requiredDownServices, requiredUpServices, setDownProtocol, setObserver, setPropertiesInternal, setProtocolStack, setTrace, setUpProtocol, setWarn, startDownHandler, startUpHandler, statsEnabled, stopInternal, upThreadEnabled |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
local_addr
org.jgroups.Address local_addr
mbrs
final java.util.Vector mbrs
my_view
org.jgroups.View my_view
my_vid
org.jgroups.ViewId my_vid
avg_send_interval
long avg_send_interval
- Sends a VIEW_SYNC message to the group every 20 seconds on average. 0 disables sending of VIEW_SYNC messages
num_views_sent
private int num_views_sent
num_views_adjusted
private int num_views_adjusted
view_send_task
VIEW_SYNC.ViewSendTask view_send_task
view_send_task_mutex
final java.lang.Object view_send_task_mutex
timer
org.jgroups.util.TimeScheduler timer
name
static final java.lang.String name
- See Also:
- Constant Field Values
VIEW_SYNC
public VIEW_SYNC()
getName
public java.lang.String getName()
getAverageSendInterval
public long getAverageSendInterval()
setAverageSendInterval
public void setAverageSendInterval(long gossip_interval)
getNumViewsSent
public int getNumViewsSent()
getNumViewsAdjusted
public int getNumViewsAdjusted()
resetStats
public void resetStats()
setProperties
public boolean setProperties(java.util.Properties props)
- Description copied from class:
org.jgroups.stack.Protocol
- Configures the protocol initially. A configuration string consists of name=value
items, separated by a ';' (semicolon), e.g.:
"loopback=false;unicast_inport=4444"
start
public void start()
throws java.lang.Exception
- Description copied from class:
org.jgroups.stack.Protocol
- This method is called on a Channel.connect(String)>
Channel.connect(String) 55 . Starts work.
Protocols are connected and queues are ready to receive events.
Will be called from bottom to top. This call will replace
the START and START_OK events.
stop
public void stop()
- Description copied from class:
org.jgroups.stack.Protocol
- This method is called on a Channel.disconnect()>
Channel.disconnect() 55 . Stops work (e.g. by closing multicast socket).
Will be called from top to bottom. This means that at the time of the method invocation the
neighbor protocol below is still working. This method will replace the
STOP, STOP_OK, CLEANUP and CLEANUP_OK events. The ProtocolStack guarantees that
when this method is called all messages in the down queue will have been flushed
sendViewRequest
public void sendViewRequest()
- Sends a VIEW_SYNC_REQ to all members, every member replies with a VIEW multicast
up
public void up(org.jgroups.Event evt)
- Description copied from class:
org.jgroups.stack.Protocol
- An event was received from the layer below. Usually the current layer will want to examine
the event type and - depending on its type - perform some computation
(e.g. removing headers from a MSG event type, or updating the internal membership list
when receiving a VIEW_CHANGE event).
Finally the event is either a) discarded, or b) an event is sent down
the stack using
passDown() or c) the event (or another event) is sent up
the stack using passUp().
down
public void down(org.jgroups.Event evt)
- Description copied from class:
org.jgroups.stack.Protocol
- An event is to be sent down the stack. The layer may want to examine its type and perform
some action on it, depending on the event's type. If the event is a message MSG, then
the layer may need to add a header to it (or do nothing at all) before sending it down
the stack using
passDown(). In case of a GET_ADDRESS event (which tries to
retrieve the stack's address from one of the bottom layers), the layer may need to send
a new response event back up the stack using passUp().
handleView
private void handleView(org.jgroups.View v,
org.jgroups.Address sender)
handleViewChange
private void handleViewChange(org.jgroups.View view)
sendView
private void sendView()
startViewSender
void startViewSender()
stopViewSender
void stopViewSender()
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