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com.hazelcast.map.impl.event.MapEventPublisherImpl Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.map.impl.event;
import com.hazelcast.core.EntryEventType;
import com.hazelcast.core.EntryView;
import com.hazelcast.internal.serialization.SerializationService;
import com.hazelcast.map.impl.EntryEventFilter;
import com.hazelcast.map.impl.EventListenerFilter;
import com.hazelcast.map.impl.MapContainer;
import com.hazelcast.map.impl.MapPartitionLostEventFilter;
import com.hazelcast.map.impl.MapServiceContext;
import com.hazelcast.map.impl.query.QueryEventFilter;
import com.hazelcast.map.impl.wan.MapReplicationRemove;
import com.hazelcast.map.impl.wan.MapReplicationUpdate;
import com.hazelcast.nio.Address;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.query.impl.CachedQueryEntry;
import com.hazelcast.query.impl.QueryableEntry;
import com.hazelcast.query.impl.getters.Extractors;
import com.hazelcast.spi.EventFilter;
import com.hazelcast.spi.EventRegistration;
import com.hazelcast.spi.EventService;
import com.hazelcast.spi.NodeEngine;
import com.hazelcast.spi.impl.eventservice.impl.TrueEventFilter;
import com.hazelcast.wan.ReplicationEventObject;
import com.hazelcast.wan.WanReplicationPublisher;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import static com.hazelcast.core.EntryEventType.EVICTED;
import static com.hazelcast.core.EntryEventType.EXPIRED;
import static com.hazelcast.core.EntryEventType.REMOVED;
import static com.hazelcast.map.impl.MapService.SERVICE_NAME;
import static com.hazelcast.util.CollectionUtil.isEmpty;
public class MapEventPublisherImpl implements MapEventPublisher {
protected final MapServiceContext mapServiceContext;
protected final NodeEngine nodeEngine;
protected final SerializationService serializationService;
protected final EventService eventService;
public MapEventPublisherImpl(MapServiceContext mapServiceContext) {
this.mapServiceContext = mapServiceContext;
this.nodeEngine = mapServiceContext.getNodeEngine();
this.serializationService = nodeEngine.getSerializationService();
this.eventService = nodeEngine.getEventService();
}
@Override
public void publishWanReplicationUpdate(String mapName, EntryView entryView) {
MapContainer mapContainer = mapServiceContext.getMapContainer(mapName);
MapReplicationUpdate replicationEvent
= new MapReplicationUpdate(mapName, mapContainer.getWanMergePolicy(), entryView);
mapContainer.getWanReplicationPublisher().publishReplicationEvent(SERVICE_NAME, replicationEvent);
}
@Override
public void publishWanReplicationRemove(String mapName, Data key, long removeTime) {
MapReplicationRemove event = new MapReplicationRemove(mapName, key, removeTime);
publishWanReplicationEventInternal(mapName, event);
}
@Override
public void publishWanReplicationUpdateBackup(String mapName, EntryView entryView) {
//NOP
}
@Override
public void publishWanReplicationRemoveBackup(String mapName, Data key, long removeTime) {
//NOP
}
@Override
public void publishMapEvent(Address caller, String mapName, EntryEventType eventType,
int numberOfEntriesAffected) {
Collection mapsListenerRegistrations = getRegistrations(mapName);
if (isEmpty(mapsListenerRegistrations)) {
return;
}
Collection registrations = null;
for (EventRegistration registration : mapsListenerRegistrations) {
EventFilter filter = registration.getFilter();
if (filter instanceof EventListenerFilter) {
if (!filter.eval(eventType.getType())) {
continue;
}
}
if (!(filter instanceof MapPartitionLostEventFilter)) {
if (registrations == null) {
registrations = new ArrayList();
}
registrations.add(registration);
}
}
if (isEmpty(registrations)) {
return;
}
String source = getThisNodesAddress();
MapEventData mapEventData = new MapEventData(source, mapName, caller, eventType.getType(), numberOfEntriesAffected);
publishEventInternal(registrations, mapEventData, mapName.hashCode());
}
@Override
public void publishEvent(Address caller, String mapName, EntryEventType eventType,
Data dataKey, Object dataOldValue, Object dataValue) {
publishEvent(caller, mapName, eventType, dataKey, dataOldValue, dataValue, null);
}
@Override
public void publishEvent(Address caller, String mapName, EntryEventType eventType,
Data dataKey, Object oldValue, Object value, Object mergingValue) {
Collection registrations = getRegistrations(mapName);
if (isEmpty(registrations)) {
return;
}
List includeValueRegistrations = null;
List nullValueRegistrations = null;
for (EventRegistration registration : registrations) {
EventFilter filter = registration.getFilter();
if (!doFilter(filter, dataKey, oldValue, value, eventType, mapName)) {
continue;
}
if (isIncludeValue(filter)) {
includeValueRegistrations = getOrCreateList(includeValueRegistrations);
includeValueRegistrations.add(registration);
} else {
nullValueRegistrations = getOrCreateList(nullValueRegistrations);
nullValueRegistrations.add(registration);
}
}
if (!isEmpty(includeValueRegistrations)) {
Data dataOldValue = mapServiceContext.toData(oldValue);
Data dataValue = mapServiceContext.toData(value);
Data dataMergingValue = mapServiceContext.toData(mergingValue);
EntryEventData eventData = createEntryEventData(mapName, caller, dataKey,
dataValue, dataOldValue, dataMergingValue, eventType.getType());
int orderKey = pickOrderKey(dataKey);
publishEventInternal(includeValueRegistrations, eventData, orderKey);
}
if (!isEmpty(nullValueRegistrations)) {
EntryEventData eventData = createEntryEventData(mapName, caller, dataKey,
null, null, null, eventType.getType());
int orderKey = pickOrderKey(dataKey);
publishEventInternal(nullValueRegistrations, eventData, orderKey);
}
}
protected List getOrCreateList(List registrations) {
if (registrations == null) {
registrations = new ArrayList();
}
return registrations;
}
//CHECKSTYLE:OFF
protected boolean doFilter(EventFilter filter, Data dataKey,
Object dataOldValue, Object dataValue, EntryEventType eventType, String mapNameOrNull) {
if (filter instanceof MapPartitionLostEventFilter) {
return false;
}
// below, order of ifs are important.
// QueryEventFilter is instance of EntryEventFilter.
// SyntheticEventFilter wraps an event filter.
if (filter instanceof EventListenerFilter) {
if (!filter.eval(eventType.getType())) {
return false;
} else {
filter = ((EventListenerFilter) filter).getEventFilter();
}
}
if (filter instanceof TrueEventFilter) {
return true;
}
if (filter instanceof QueryEventFilter) {
return processQueryEventFilter(filter, eventType, dataKey, dataOldValue, dataValue, mapNameOrNull);
}
if (filter instanceof EntryEventFilter) {
return processEntryEventFilter(filter, dataKey);
}
throw new IllegalArgumentException("Unknown EventFilter type = [" + filter.getClass().getCanonicalName() + "]");
}
//CHECKSTYLE:ON
protected boolean isIncludeValue(EventFilter filter) {
// below, order of ifs are important.
// QueryEventFilter is instance of EntryEventFilter.
// SyntheticEventFilter wraps an event filter.
if (filter instanceof EventListenerFilter) {
filter = ((EventListenerFilter) filter).getEventFilter();
}
if (filter instanceof TrueEventFilter) {
return true;
}
if (filter instanceof QueryEventFilter) {
return ((QueryEventFilter) filter).isIncludeValue();
}
if (filter instanceof EntryEventFilter) {
return ((EntryEventFilter) filter).isIncludeValue();
}
throw new IllegalArgumentException("Unknown EventFilter type = [" + filter.getClass().getCanonicalName() + "]");
}
@Override
public void publishMapPartitionLostEvent(Address caller, String mapName, int partitionId) {
Collection registrations = new LinkedList();
for (EventRegistration registration : getRegistrations(mapName)) {
if (registration.getFilter() instanceof MapPartitionLostEventFilter) {
registrations.add(registration);
}
}
if (registrations.isEmpty()) {
return;
}
String thisNodesAddress = getThisNodesAddress();
MapPartitionEventData eventData = new MapPartitionEventData(thisNodesAddress, mapName, caller, partitionId);
publishEventInternal(registrations, eventData, partitionId);
}
@Override
public void hintMapEvent(Address caller, String mapName, EntryEventType eventType,
int numberOfEntriesAffected, int partitionId) {
// NOP
}
protected Collection getRegistrations(String mapName) {
return eventService.getRegistrations(SERVICE_NAME, mapName);
}
private int pickOrderKey(Data key) {
return key == null ? -1 : key.hashCode();
}
protected void publishEventInternal(Collection registrations, Object eventData, int orderKey) {
eventService.publishEvent(SERVICE_NAME, registrations, eventData, orderKey);
}
private String getThisNodesAddress() {
Address thisAddress = nodeEngine.getThisAddress();
return thisAddress.toString();
}
private boolean processEntryEventFilter(EventFilter filter, Data dataKey) {
EntryEventFilter eventFilter = (EntryEventFilter) filter;
return eventFilter.eval(dataKey);
}
private boolean processQueryEventFilter(EventFilter filter, EntryEventType eventType,
Data dataKey, Object dataOldValue, Object dataValue, String mapNameOrNull) {
Object testValue;
if (eventType == REMOVED || eventType == EVICTED || eventType == EXPIRED) {
testValue = dataOldValue;
} else {
testValue = dataValue;
}
Extractors extractors = getExtractorsForMapName(mapNameOrNull);
QueryEventFilter queryEventFilter = (QueryEventFilter) filter;
QueryableEntry entry = new CachedQueryEntry(serializationService, dataKey, testValue, extractors);
return queryEventFilter.eval(entry);
}
private Extractors getExtractorsForMapName(String mapName) {
if (mapName == null) {
return Extractors.empty();
}
return mapServiceContext.getExtractors(mapName);
}
protected void publishWanReplicationEventInternal(String mapName, ReplicationEventObject event) {
MapContainer mapContainer = mapServiceContext.getMapContainer(mapName);
WanReplicationPublisher wanReplicationPublisher = mapContainer.getWanReplicationPublisher();
wanReplicationPublisher.publishReplicationEvent(SERVICE_NAME, event);
}
private EntryEventData createEntryEventData(String mapName, Address caller,
Data dataKey, Data dataNewValue, Data dataOldValue,
Data dataMergingValue, int eventType) {
String thisNodesAddress = getThisNodesAddress();
return new EntryEventData(thisNodesAddress, mapName, caller,
dataKey, dataNewValue, dataOldValue, dataMergingValue, eventType);
}
}
