jdeppe-pivotal commented on a change in pull request #7408: URL: https://github.com/apache/geode/pull/7408#discussion_r820882349
########## File path: geode-for-redis/src/main/java/org/apache/geode/redis/internal/eventing/EventDistributor.java ########## @@ -0,0 +1,128 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more contributor license + * agreements. See the NOTICE file distributed with this work for additional information regarding + * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance with the License. You may obtain a + * copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software distributed under the License + * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express + * or implied. See the License for the specific language governing permissions and limitations under + * the License. + */ + +package org.apache.geode.redis.internal.eventing; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.Timer; +import java.util.TimerTask; + +import org.apache.logging.log4j.Logger; + +import org.apache.geode.annotations.VisibleForTesting; +import org.apache.geode.cache.partition.PartitionListenerAdapter; +import org.apache.geode.logging.internal.log4j.api.LogService; +import org.apache.geode.redis.internal.commands.RedisCommandType; +import org.apache.geode.redis.internal.data.RedisKey; + +public class EventDistributor extends PartitionListenerAdapter { + + private static final Logger logger = LogService.getLogger(); + private final Map<RedisKey, List<EventListener>> listeners = new HashMap<>(); + private final Map<EventListener, TimerTask> timerTasks = new HashMap<>(); + private final Timer timer = new Timer("GeodeForRedisEventTimer", true); + private int keysRegistered = 0; + + public synchronized void registerListener(EventListener listener) { + for (RedisKey key : listener.keys()) { + listeners.computeIfAbsent(key, k -> new ArrayList<>()).add(listener); + } + + if (listener.getTimeout() != 0) { + scheduleTimeout(listener, listener.getTimeout()); + } + + keysRegistered += listener.keys().size(); + } + + public synchronized void fireEvent(RedisCommandType command, RedisKey key) { + if (listeners.isEmpty()) { + return; + } + + List<EventListener> listenerList = listeners.get(key); + if (listenerList == null) { + return; + } + + for (EventListener listener : listenerList) { + if (listener.process(command, key) == EventResponse.REMOVE_AND_STOP) { + removeListener(listener); + break; + } + } + } + + /** + * The total number of keys registered by all listeners (includes duplicates). + */ + @VisibleForTesting + public int size() { + return keysRegistered; + } + + @Override + public synchronized void afterBucketRemoved(int bucketId, Iterable<?> keys) { + Set<EventListener> resubmittingList = new HashSet<>(); + for (Map.Entry<RedisKey, List<EventListener>> entry : listeners.entrySet()) { + if (entry.getKey().getBucketId() == bucketId) { + resubmittingList.addAll(entry.getValue()); + } + } + + resubmittingList.forEach(x -> { + x.resubmitCommand(); + removeListener(x); + }); + } + + private synchronized void removeListener(EventListener listener) { + boolean listenerRemoved = false; + for (RedisKey key : listener.keys()) { + List<EventListener> listenerList = listeners.get(key); + listenerRemoved |= listenerList.remove(listener); + if (listenerList.isEmpty()) { + listeners.remove(key); + } + } + + if (listenerRemoved) { + keysRegistered -= listener.keys().size(); + if (listener.getTimeout() > 0) { + timerTasks.remove(listener).cancel(); + } + } + } + + private void scheduleTimeout(EventListener listener, long timeout) { + TimerTask task = new TimerTask() { Review comment: I think this is all taken care of now. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: notifications-unsubscr...@geode.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
