java.lang.Object
org.jgroups.stack.Protocol
org.jgroups.protocols.VERIFY_SUSPECT
- All Implemented Interfaces:
- java.lang.Runnable
- public class VERIFY_SUSPECT
- extends org.jgroups.stack.Protocol
- implements java.lang.Runnable
Catches SUSPECT events traveling up the stack. Verifies that the suspected member is really dead. If yes,
passes SUSPECT event up the stack, otherwise discards it. Has to be placed somewhere above the FD layer and
below the GMS layer (receiver of the SUSPECT event). Note that SUSPECT events may be reordered by this protocol.
| 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, down, downThreadEnabled, dumpStats, enableStats, getDownProtocol, getDownQueue, getProperties, getUpProtocol, getUpQueue, handleSpecialDownEvent, init, isTrace, isWarn, passDown, passUp, printStats, providedDownServices, providedUpServices, receiveDownEvent, receiveUpEvent, requiredDownServices, requiredUpServices, resetStats, setDownProtocol, setObserver, setPropertiesInternal, setProtocolStack, setTrace, setUpProtocol, setWarn, start, 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
timeout
long timeout
num_msgs
int num_msgs
members
final java.util.Vector members
suspects
final java.util.Hashtable suspects
timer
java.lang.Thread timer
name
final java.lang.String name
- See Also:
- Constant Field Values
VERIFY_SUSPECT
public VERIFY_SUSPECT()
getName
public java.lang.String getName()
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"
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().
run
public void run()
- Will be started when a suspect is added to the suspects hashtable. Continually iterates over the
entries and removes entries whose time have elapsed. For each removed entry, a SUSPECT event is passed
up the stack (because elapsed time means verification of member's liveness failed). Computes the shortest
time to wait (min of all timeouts) and waits(time) msecs. Will be woken up when entry is removed (in case
of successful verification of that member's liveness). Terminates when no entry remains in the hashtable.
- Specified by:
run in interface java.lang.Runnable
suspect
void suspect(org.jgroups.Address mbr)
- Sends ARE_YOU_DEAD message to suspected_mbr, wait for return or timeout
unsuspect
void unsuspect(org.jgroups.Address mbr)
startTimer
void startTimer()
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
JAVADOC | 
SOURCE | 
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