public class BARRIER extends Protocol
Constructor and Description |
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BARRIER() |
Modifier and Type | Method and Description |
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protected void |
blockIfBarrierClosed(Thread current_thread) |
void |
destroy()
This method is called on a
Channel.close() . |
Object |
down(Event evt)
An event is to be sent down the stack.
|
int |
getInFlightThreadsCount() |
int |
getNumberOfInFlightThreads() |
void |
init()
Called after instance has been created (null constructor) and before protocol is started.
|
boolean |
isClosed() |
boolean |
isOpenerScheduled() |
void |
openBarrier() |
void |
stop()
This method is called on a
Channel.disconnect() . |
protected void |
unblock(Thread current_thread) |
Object |
up(Event evt)
An event was received from the layer below.
|
void |
up(MessageBatch batch)
Sends up a multiple messages in a
MessageBatch . |
accept, dumpStats, enableStats, getConfigurableObjects, getDownProtocol, getDownServices, getId, getIdsAbove, getLevel, getName, getProtocolStack, getSocketFactory, getThreadFactory, getTransport, getUpProtocol, getUpServices, getValue, isErgonomics, level, printStats, providedDownServices, providedUpServices, requiredDownServices, requiredUpServices, resetStatistics, resetStats, setDownProtocol, setErgonomics, setId, setLevel, setProtocolStack, setSocketFactory, setUpProtocol, setValue, setValues, start, statsEnabled
public boolean isClosed()
public int getNumberOfInFlightThreads()
public int getInFlightThreadsCount()
public boolean isOpenerScheduled()
public void init() throws Exception
Protocol
public void stop()
Protocol
Channel.disconnect()
. 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 flushedpublic void destroy()
Protocol
Channel.close()
.
Does some cleanup; after the call the VM will terminatepublic Object down(Event evt)
Protocol
down_prot.down()
. 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 up_prot.up()
.public Object up(Event evt)
Protocol
down_prot.down()
or c) the event (or another event) is sent up
the stack using up_prot.up()
.public void up(MessageBatch batch)
Protocol
MessageBatch
. The sender of the batch is always the same, and so is the
destination (null == multicast messages). Messages in a batch can be OOB messages, regular messages, or mixed
messages, although the transport itself will create initial MessageBatches that contain only either OOB or
regular messages.
The default processing below sends messages up the stack individually, based on a matching criteria
(calling Protocol.accept(org.jgroups.Message)
), and - if true - calls Protocol.up(org.jgroups.Event)
for that message and removes the message. If the batch is not empty, it is passed up, or else it is dropped.
Subclasses should check if there are any messages destined for them (e.g. using
MessageBatch.getMatchingMessages(short,boolean)
), then possibly remove and process them and finally pass
the batch up to the next protocol. Protocols can also modify messages in place, e.g. ENCRYPT could decrypt all
encrypted messages in the batch, not remove them, and pass the batch up when done.protected void blockIfBarrierClosed(Thread current_thread)
protected void unblock(Thread current_thread)
public void openBarrier()
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