Examples with GatewayQueueEvent org.apache.geode.cache.wan.GatewayQueueEvent used on opensource projects

Example 1 with GatewayQueueEvent

use of org.apache.geode.cache.wan.GatewayQueueEvent in project geode by apache.

the class AbstractGatewaySenderEventProcessor method processQueue.

protected void processQueue() {
    final boolean isDebugEnabled = logger.isDebugEnabled();
    final boolean isTraceEnabled = logger.isTraceEnabled();
    final int batchTimeInterval = sender.getBatchTimeInterval();
    final GatewaySenderStats statistics = this.sender.getStatistics();
    if (isDebugEnabled) {
        logger.debug("STARTED processQueue {}", this.getId());
    }
    // list of the events peeked from queue
    List<GatewaySenderEventImpl> events = null;
    // list of the above peeked events which are filtered through the filters attached
    List<GatewaySenderEventImpl> filteredList = new ArrayList<GatewaySenderEventImpl>();
    // list of the PDX events which are peeked from pDX region and needs to go acrossthe site
    List<GatewaySenderEventImpl> pdxEventsToBeDispatched = new ArrayList<GatewaySenderEventImpl>();
    // list of filteredList + pdxEventsToBeDispatched events
    List<GatewaySenderEventImpl> eventsToBeDispatched = new ArrayList<GatewaySenderEventImpl>();
    for (; ; ) {
        if (stopped()) {
            break;
        }
        try {
            // Check if paused. If so, wait for resumption
            if (this.isPaused) {
                waitForResumption();
            }
            // Peek a batch
            if (isDebugEnabled) {
                logger.debug("Attempting to peek a batch of {} events", this.batchSize);
            }
            for (; ; ) {
                // check before sleeping
                if (stopped()) {
                    if (isDebugEnabled) {
                        logger.debug("GatewaySenderEventProcessor is stopped. Returning without peeking events.");
                    }
                    break;
                }
                // Check if paused. If so, wait for resumption
                if (this.isPaused) {
                    waitForResumption();
                }
                // We need to initialize connection in dispatcher before sending first
                // batch here ONLY, because we need GatewayReceiver's version for
                // filtering VERSION_ACTION events from being sent.
                boolean sendUpdateVersionEvents = shouldSendVersionEvents(this.dispatcher);
                // sleep a little bit, look for events
                boolean interrupted = Thread.interrupted();
                try {
                    if (resetLastPeekedEvents) {
                        resetLastPeekedEvents();
                        resetLastPeekedEvents = false;
                    }
                    {
                    // Below code was added to consider the case of queue region is
                    // destroyed due to userPRs localdestroy or destroy operation.
                    // In this case we were waiting for queue region to get created
                    // and then only peek from the region queue.
                    // With latest change of multiple PR with single ParalleSender, we
                    // cant wait for particular regionqueue to get recreated as there
                    // will be other region queue from which events can be picked
                    /*
               * // Check if paused. If so, wait for resumption if (this.isPaused) {
               * waitForResumption(); }
               * 
               * synchronized (this.getQueue()) { // its quite possible that the queue region is //
               * destroyed(userRegion // localdestroy destroys shadow region locally). In this case
               * // better to // wait for shadows region to get recreated instead of keep loop //
               * for peeking events if (this.getQueue().getRegion() == null ||
               * this.getQueue().getRegion().isDestroyed()) { try { this.getQueue().wait();
               * continue; // this continue is important to recheck the // conditions of stop/ pause
               * after the wait of 1 sec } catch (InterruptedException e1) {
               * Thread.currentThread().interrupt(); } } }
               */
                    }
                    events = this.queue.peek(this.batchSize, batchTimeInterval);
                } catch (InterruptedException e) {
                    interrupted = true;
                    this.sender.getCancelCriterion().checkCancelInProgress(e);
                    // keep trying
                    continue;
                } finally {
                    if (interrupted) {
                        Thread.currentThread().interrupt();
                    }
                }
                if (events.isEmpty()) {
                    // nothing to do!
                    continue;
                }
                // this list is access by ack reader thread so create new every time. #50220
                filteredList = new ArrayList<GatewaySenderEventImpl>();
                filteredList.addAll(events);
                // remove all events whose serialized value is no longer available
                if (this.exception != null && this.exception.getCause() != null && this.exception.getCause() instanceof IllegalStateException) {
                    for (Iterator<GatewaySenderEventImpl> i = filteredList.iterator(); i.hasNext(); ) {
                        GatewaySenderEventImpl event = i.next();
                        if (event.isSerializedValueNotAvailable()) {
                            i.remove();
                        }
                    }
                    this.exception = null;
                }
                // Filter the events
                for (GatewayEventFilter filter : sender.getGatewayEventFilters()) {
                    Iterator<GatewaySenderEventImpl> itr = filteredList.iterator();
                    while (itr.hasNext()) {
                        GatewayQueueEvent event = itr.next();
                        // version is < 7.0.1, especially to prevent another loop over events.
                        if (!sendUpdateVersionEvents && event.getOperation() == Operation.UPDATE_VERSION_STAMP) {
                            if (isTraceEnabled) {
                                logger.trace("Update Event Version event: {} removed from Gateway Sender queue: {}", event, sender);
                            }
                            itr.remove();
                            statistics.incEventsNotQueued();
                            continue;
                        }
                        boolean transmit = filter.beforeTransmit(event);
                        if (!transmit) {
                            if (isDebugEnabled) {
                                logger.debug("{}: Did not transmit event due to filtering: {}", sender.getId(), event);
                            }
                            itr.remove();
                            statistics.incEventsFiltered();
                        }
                    }
                }
                // AsyncEventQueue since possibleDuplicate flag is not used in WAN.
                if (this.getSender().isParallel() && (this.getDispatcher() instanceof GatewaySenderEventCallbackDispatcher)) {
                    Iterator<GatewaySenderEventImpl> itr = filteredList.iterator();
                    while (itr.hasNext()) {
                        GatewaySenderEventImpl event = (GatewaySenderEventImpl) itr.next();
                        PartitionedRegion qpr = null;
                        if (this.getQueue() instanceof ConcurrentParallelGatewaySenderQueue) {
                            qpr = ((ConcurrentParallelGatewaySenderQueue) this.getQueue()).getRegion(event.getRegionPath());
                        } else {
                            qpr = ((ParallelGatewaySenderQueue) this.getQueue()).getRegion(event.getRegionPath());
                        }
                        int bucketId = event.getBucketId();
                        // primary, then set possibleDuplicate to true on the event
                        if (qpr != null) {
                            BucketRegion bucket = qpr.getDataStore().getLocalBucketById(bucketId);
                            if (bucket == null || !bucket.getBucketAdvisor().isPrimary()) {
                                event.setPossibleDuplicate(true);
                                if (isDebugEnabled) {
                                    logger.debug("Bucket id: {} is no longer primary on this node. The event: {} will be dispatched from this node with possibleDuplicate set to true.", bucketId, event);
                                }
                            }
                        }
                    }
                }
                eventsToBeDispatched.clear();
                if (!(this.dispatcher instanceof GatewaySenderEventCallbackDispatcher)) {
                    // store the batch before dispatching so it can be retrieved by the ack thread.
                    List<GatewaySenderEventImpl>[] eventsArr = (List<GatewaySenderEventImpl>[]) new List[2];
                    eventsArr[0] = events;
                    eventsArr[1] = filteredList;
                    this.batchIdToEventsMap.put(getBatchId(), eventsArr);
                    // find out PDX event and append it in front of the list
                    pdxEventsToBeDispatched = addPDXEvent();
                    eventsToBeDispatched.addAll(pdxEventsToBeDispatched);
                    if (!pdxEventsToBeDispatched.isEmpty()) {
                        this.batchIdToPDXEventsMap.put(getBatchId(), pdxEventsToBeDispatched);
                    }
                }
                eventsToBeDispatched.addAll(filteredList);
                // Conflate the batch. Event conflation only occurs on the queue.
                // Once an event has been peeked into a batch, it won't be
                // conflated. So if events go through the queue quickly (as in the
                // no-ack case), then multiple events for the same key may end up in
                // the batch.
                List conflatedEventsToBeDispatched = conflate(eventsToBeDispatched);
                if (isDebugEnabled) {
                    logBatchFine("During normal processing, dispatching the following ", conflatedEventsToBeDispatched);
                }
                boolean success = this.dispatcher.dispatchBatch(conflatedEventsToBeDispatched, sender.isRemoveFromQueueOnException(), false);
                if (success) {
                    if (isDebugEnabled) {
                        logger.debug("During normal processing, successfully dispatched {} events (batch #{})", conflatedEventsToBeDispatched.size(), getBatchId());
                    }
                    removeEventFromFailureMap(getBatchId());
                } else {
                    if (!skipFailureLogging(getBatchId())) {
                        logger.warn(LocalizedMessage.create(LocalizedStrings.GatewayImpl_EVENT_QUEUE_DISPATCH_FAILED, new Object[] { filteredList.size(), getBatchId() }));
                    }
                }
                // check again, don't do post-processing if we're stopped.
                if (stopped()) {
                    break;
                }
                // If the batch is successfully processed, remove it from the queue.
                if (success) {
                    if (this.dispatcher instanceof GatewaySenderEventCallbackDispatcher) {
                        handleSuccessfulBatchDispatch(conflatedEventsToBeDispatched, events);
                    } else {
                        incrementBatchId();
                    }
                    // isDispatched
                    for (GatewaySenderEventImpl pdxGatewaySenderEvent : pdxEventsToBeDispatched) {
                        pdxGatewaySenderEvent.isDispatched = true;
                    }
                    if (TEST_HOOK) {
                        this.numEventsDispatched += conflatedEventsToBeDispatched.size();
                    }
                } else // successful batch
                {
                    // The batch was unsuccessful.
                    if (this.dispatcher instanceof GatewaySenderEventCallbackDispatcher) {
                        handleUnSuccessfulBatchDispatch(events);
                        this.resetLastPeekedEvents = true;
                    } else {
                        handleUnSuccessfulBatchDispatch(events);
                        if (!resetLastPeekedEvents) {
                            while (!this.dispatcher.dispatchBatch(conflatedEventsToBeDispatched, sender.isRemoveFromQueueOnException(), true)) {
                                if (isDebugEnabled) {
                                    logger.debug("During normal processing, unsuccessfully dispatched {} events (batch #{})", conflatedEventsToBeDispatched.size(), getBatchId());
                                }
                                if (stopped() || resetLastPeekedEvents) {
                                    break;
                                }
                                try {
                                    Thread.sleep(100);
                                } catch (InterruptedException ie) {
                                    Thread.currentThread().interrupt();
                                }
                            }
                            incrementBatchId();
                        }
                    }
                }
                // unsuccessful batch
                if (logger.isDebugEnabled()) {
                    logger.debug("Finished processing events (batch #{})", (getBatchId() - 1));
                }
            }
        // for
        } catch (RegionDestroyedException e) {
            // setting this flag will ensure that already peeked events will make
            // it to the next batch before new events are peeked (fix for #48784)
            this.resetLastPeekedEvents = true;
            // shadow PR is also locally destroyed
            if (logger.isDebugEnabled()) {
                logger.debug("Observed RegionDestroyedException on Queue's region.");
            }
        } catch (CancelException e) {
            logger.debug("Caught cancel exception", e);
            setIsStopped(true);
        } catch (VirtualMachineError err) {
            SystemFailure.initiateFailure(err);
            // now, so don't let this thread continue.
            throw err;
        } catch (Throwable e) {
            // Whenever you catch Error or Throwable, you must also
            // catch VirtualMachineError (see above). However, there is
            // _still_ a possibility that you are dealing with a cascading
            // error condition, so you also need to check to see if the JVM
            // is still usable:
            SystemFailure.checkFailure();
            // Well, OK. Some strange nonfatal thing.
            if (stopped()) {
                // don't complain, just exit.
                return;
            }
            if (events != null) {
                handleUnSuccessfulBatchDispatch(events);
            }
            this.resetLastPeekedEvents = true;
            if (e instanceof GatewaySenderException) {
                Throwable cause = e.getCause();
                if (cause instanceof IOException || e instanceof GatewaySenderConfigurationException) {
                    continue;
                }
            }
            // We'll log it but continue on with the next batch.
            logger.warn(LocalizedMessage.create(LocalizedStrings.GatewayImpl_AN_EXCEPTION_OCCURRED_THE_DISPATCHER_WILL_CONTINUE), e);
        }
    }
// for
}