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com.hazelcast.map.impl.MapEventPublisherImpl Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2015, 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;
import com.hazelcast.core.EntryEventType;
import com.hazelcast.core.EntryView;
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.nio.serialization.SerializationService;
import com.hazelcast.query.impl.QueryEntry;
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.EmptyFilter;
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.map.impl.MapService.SERVICE_NAME;
class MapEventPublisherImpl implements MapEventPublisher {
protected final MapServiceContext mapServiceContext;
protected MapEventPublisherImpl(MapServiceContext mapServiceContext) {
this.mapServiceContext = mapServiceContext;
}
@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) {
final MapReplicationRemove event = new MapReplicationRemove(mapName, key, removeTime);
publishWanReplicationEventInternal(mapName, event);
}
@Override
public void publishMapEvent(Address caller, String mapName, EntryEventType eventType,
int numberOfEntriesAffected) {
final Collection registrations = new LinkedList();
for (EventRegistration registration : getRegistrations(mapName)) {
if (!(registration.getFilter() instanceof MapPartitionLostEventFilter)) {
registrations.add(registration);
}
}
if (registrations.isEmpty()) {
return;
}
final String source = getThisNodesAddress();
final 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, Data dataOldValue, Data dataValue) {
publishEvent(caller, mapName, eventType, false, dataKey, dataOldValue, dataValue);
}
@Override
public void publishEvent(Address caller, String mapName, EntryEventType eventType, boolean syntheticEvent,
final Data dataKey, Data dataOldValue, Data dataValue) {
publishEvent(caller, mapName, eventType, syntheticEvent, dataKey, dataOldValue, dataValue, null);
}
@Override
public void publishEvent(Address caller, String mapName, EntryEventType eventType, boolean syntheticEvent,
final Data dataKey, Data dataOldValue, Data dataValue, Data dataMergingValue) {
final Collection registrations = getRegistrations(mapName);
if (registrations.isEmpty()) {
return;
}
List registrationsWithValue = null;
List registrationsWithoutValue = null;
for (final EventRegistration candidate : registrations) {
final EventFilter filter = candidate.getFilter();
final Result result = applyEventFilter(filter, syntheticEvent, dataKey, dataOldValue, dataValue, eventType);
registrationsWithValue = initRegistrationsWithValue(registrationsWithValue, result);
registrationsWithoutValue = initRegistrationsWithoutValue(registrationsWithoutValue, result);
registerCandidate(result, candidate, registrationsWithValue, registrationsWithoutValue);
}
final boolean withValueRegistrationExists = isNotEmpty(registrationsWithValue);
final boolean withoutValueRegistrationExists = isNotEmpty(registrationsWithoutValue);
if (!withValueRegistrationExists && !withoutValueRegistrationExists) {
return;
}
final EntryEventData eventData = createEntryEventData(mapName, caller,
dataKey, dataValue, dataOldValue, dataMergingValue, eventType.getType());
final int orderKey = pickOrderKey(dataKey);
if (withValueRegistrationExists) {
publishEventInternal(registrationsWithValue, eventData, orderKey);
}
if (withoutValueRegistrationExists) {
publishEventInternal(registrationsWithoutValue, eventData.cloneWithoutValues(), orderKey);
}
}
@Override
public void publishMapPartitionLostEvent(Address caller, String mapName, int partitionId) {
final Collection registrations = new LinkedList();
for (EventRegistration registration : getRegistrations(mapName)) {
if (registration.getFilter() instanceof MapPartitionLostEventFilter) {
registrations.add(registration);
}
}
if (registrations.isEmpty()) {
return;
}
final String thisNodesAddress = getThisNodesAddress();
final 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
}
private List initRegistrationsWithoutValue(List registrationsWithoutValue,
Result result) {
if (registrationsWithoutValue != null) {
return registrationsWithoutValue;
}
if (Result.NO_VALUE_INCLUDED.equals(result)) {
registrationsWithoutValue = new ArrayList();
}
return registrationsWithoutValue;
}
private List initRegistrationsWithValue(List registrationsWithValue,
Result result) {
if (registrationsWithValue != null) {
return registrationsWithValue;
}
if (Result.VALUE_INCLUDED.equals(result)) {
registrationsWithValue = new ArrayList();
}
return registrationsWithValue;
}
private static boolean isNotEmpty(Collection collection) {
return !(collection == null || collection.isEmpty());
}
protected Result applyEventFilter(EventFilter filter, boolean syntheticEvent, Data dataKey,
Data dataOldValue, Data dataValue, EntryEventType eventType) {
if (filter instanceof MapPartitionLostEventFilter) {
return Result.NONE;
}
// below, order of ifs are important.
// QueryEventFilter is instance of EntryEventFilter.
// SyntheticEventFilter wraps an event filter.
if (filter instanceof SyntheticEventFilter) {
if (syntheticEvent) {
return Result.NONE;
}
final SyntheticEventFilter syntheticEventFilter = (SyntheticEventFilter) filter;
filter = syntheticEventFilter.getFilter();
}
if (filter instanceof EmptyFilter) {
return Result.VALUE_INCLUDED;
}
if (filter instanceof QueryEventFilter) {
return processQueryEventFilter(filter, eventType, dataKey, dataOldValue, dataValue);
}
if (filter instanceof EntryEventFilter) {
return processEntryEventFilter(filter, dataKey);
}
throw new IllegalArgumentException("Unknown EventFilter type = [" + filter.getClass().getCanonicalName() + "]");
}
Collection getRegistrations(String mapName) {
final MapServiceContext mapServiceContext = this.mapServiceContext;
final NodeEngine nodeEngine = mapServiceContext.getNodeEngine();
final EventService eventService = nodeEngine.getEventService();
return eventService.getRegistrations(SERVICE_NAME, mapName);
}
private int pickOrderKey(Data key) {
return key == null ? -1 : key.hashCode();
}
private void registerCandidate(Result result, EventRegistration candidate,
Collection registrationsWithValue,
Collection registrationsWithoutValue) {
switch (result) {
case VALUE_INCLUDED:
registrationsWithValue.add(candidate);
break;
case NO_VALUE_INCLUDED:
registrationsWithoutValue.add(candidate);
break;
case NONE:
break;
default:
throw new IllegalArgumentException("Not a known result type [" + result + "]");
}
}
void publishEventInternal(Collection registrations, Object eventData, int orderKey) {
final MapServiceContext mapServiceContext = this.mapServiceContext;
final NodeEngine nodeEngine = mapServiceContext.getNodeEngine();
final EventService eventService = nodeEngine.getEventService();
eventService.publishEvent(SERVICE_NAME, registrations, eventData, orderKey);
}
private String getThisNodesAddress() {
final NodeEngine nodeEngine = mapServiceContext.getNodeEngine();
final Address thisAddress = nodeEngine.getThisAddress();
return thisAddress.toString();
}
private Result processEntryEventFilter(EventFilter filter, Data dataKey) {
final EntryEventFilter eventFilter = (EntryEventFilter) filter;
if (!eventFilter.eval(dataKey)) {
return Result.NONE;
}
if (eventFilter.isIncludeValue()) {
return Result.VALUE_INCLUDED;
}
return Result.NO_VALUE_INCLUDED;
}
private Result processQueryEventFilter(EventFilter filter, EntryEventType eventType,
final Data dataKey, Data dataOldValue, Data dataValue) {
final NodeEngine nodeEngine = mapServiceContext.getNodeEngine();
final SerializationService serializationService = nodeEngine.getSerializationService();
Data testValue;
if (eventType == EntryEventType.REMOVED || eventType == EntryEventType.EVICTED) {
testValue = dataOldValue;
} else {
testValue = dataValue;
}
final QueryEventFilter queryEventFilter = (QueryEventFilter) filter;
final QueryEntry entry = new QueryEntry(serializationService, dataKey, dataKey, testValue);
if (queryEventFilter.eval(entry)) {
return queryEventFilter.isIncludeValue() ? Result.VALUE_INCLUDED : Result.NO_VALUE_INCLUDED;
}
return Result.NONE;
}
void publishWanReplicationEventInternal(String mapName, ReplicationEventObject event) {
final MapServiceContext mapServiceContext = this.mapServiceContext;
final MapContainer mapContainer = mapServiceContext.getMapContainer(mapName);
final 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) {
final String thisNodesAddress = getThisNodesAddress();
return new EntryEventData(thisNodesAddress, mapName, caller,
dataKey, dataNewValue, dataOldValue, dataMergingValue, eventType);
}
protected enum Result {
VALUE_INCLUDED,
NO_VALUE_INCLUDED,
NONE
}
}
