/*
* Copyright (c) 2008-2013, 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.operation;
import com.hazelcast.config.InMemoryFormat;
import com.hazelcast.core.EntryEventType;
import com.hazelcast.core.EntryView;
import com.hazelcast.core.ManagedContext;
import com.hazelcast.map.EntryBackupProcessor;
import com.hazelcast.map.EntryProcessor;
import com.hazelcast.map.MapEntrySimple;
import com.hazelcast.map.MapEventPublisher;
import com.hazelcast.map.MapServiceContext;
import com.hazelcast.map.record.Record;
import com.hazelcast.monitor.impl.LocalMapStatsImpl;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.spi.BackupAwareOperation;
import com.hazelcast.spi.EventService;
import com.hazelcast.spi.Operation;
import com.hazelcast.util.Clock;
import java.io.IOException;
import java.util.AbstractMap;
import static com.hazelcast.map.EntryViews.createSimpleEntryView;
/**
* GOTCHA : This operation loads missing keys from mapstore, in contrast with PartitionWideEntryOperation.
*/
public class EntryOperation extends LockAwareOperation implements BackupAwareOperation {
private static final EntryEventType NO_NEED_TO_FIRE_EVENT = null;
protected Object oldValue;
private EntryProcessor entryProcessor;
private EntryEventType eventType;
private Object response;
public EntryOperation(String name, Data dataKey, EntryProcessor entryProcessor) {
super(name, dataKey);
this.entryProcessor = entryProcessor;
}
public EntryOperation() {
}
public void innerBeforeRun() {
final ManagedContext managedContext = getNodeEngine().getSerializationService().getManagedContext();
managedContext.initialize(entryProcessor);
}
public void run() {
final MapServiceContext mapServiceContext = mapService.getMapServiceContext();
final long start = System.currentTimeMillis();
oldValue = recordStore.getMapEntry(dataKey).getValue();
final LocalMapStatsImpl mapStats
= mapServiceContext.getLocalMapStatsProvider().getLocalMapStatsImpl(name);
final Object valueBeforeProcess = mapServiceContext.toObject(oldValue);
final MapEntrySimple entry = new MapEntrySimple(mapServiceContext.toObject(dataKey), valueBeforeProcess);
response = mapServiceContext.toData(entryProcessor.process(entry));
final Object valueAfterProcess = entry.getValue();
// no matching data by key.
if (oldValue == null && valueAfterProcess == null) {
eventType = NO_NEED_TO_FIRE_EVENT;
} else if (valueAfterProcess == null) {
recordStore.remove(dataKey);
mapStats.incrementRemoves(getLatencyFrom(start));
eventType = EntryEventType.REMOVED;
} else {
if (oldValue == null) {
mapStats.incrementPuts(getLatencyFrom(start));
eventType = EntryEventType.ADDED;
} else if (!entry.isModified()) {
// take this case as a read so no need to fire an event.
mapStats.incrementGets(getLatencyFrom(start));
eventType = NO_NEED_TO_FIRE_EVENT;
} else {
mapStats.incrementPuts(getLatencyFrom(start));
eventType = EntryEventType.UPDATED;
}
if (eventType != NO_NEED_TO_FIRE_EVENT) {
recordStore.put(new AbstractMap.SimpleImmutableEntry<Data, Object>(dataKey, entry.getValue()));
dataValue = mapServiceContext.toData(entry.getValue());
}
}
}
public void afterRun() throws Exception {
super.afterRun();
if (eventType == NO_NEED_TO_FIRE_EVENT) {
return;
}
final MapServiceContext mapServiceContext = mapService.getMapServiceContext();
MapEventPublisher mapEventPublisher = mapServiceContext.getMapEventPublisher();
String serviceName = mapServiceContext.serviceName();
InMemoryFormat format = mapContainer.getMapConfig().getInMemoryFormat();
EventService eventService = mapServiceContext.getNodeEngine().getEventService();
if (eventService.hasEventRegistration(serviceName, name)) {
if (format == InMemoryFormat.OBJECT && eventType != EntryEventType.REMOVED) {
oldValue = null;
}
mapService.getMapServiceContext().getMapEventPublisher().
publishEvent(getCallerAddress(), name, eventType, dataKey, mapServiceContext.toData(oldValue), dataValue);
}
invalidateNearCaches();
if (mapContainer.getWanReplicationPublisher() != null && mapContainer.getWanMergePolicy() != null) {
if (EntryEventType.REMOVED.equals(eventType)) {
mapEventPublisher.publishWanReplicationRemove(name, dataKey, Clock.currentTimeMillis());
} else {
Record record = recordStore.getRecord(dataKey);
if (record != null) {
final Data dataValueAsData = mapServiceContext.toData(dataValue);
final EntryView entryView = createSimpleEntryView(dataKey, dataValueAsData, record);
mapEventPublisher.publishWanReplicationUpdate(name, entryView);
}
}
}
}
@Override
public void onWaitExpire() {
getResponseHandler().sendResponse(null);
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
super.readInternal(in);
entryProcessor = in.readObject();
}
@Override
protected void writeInternal(ObjectDataOutput out) throws IOException {
super.writeInternal(out);
out.writeObject(entryProcessor);
}
@Override
public Object getResponse() {
return response;
}
@Override
public String toString() {
return "EntryOperation{}";
}
public Operation getBackupOperation() {
EntryBackupProcessor backupProcessor = entryProcessor.getBackupProcessor();
return backupProcessor != null ? new EntryBackupOperation(name, dataKey, backupProcessor) : null;
}
public boolean shouldBackup() {
return entryProcessor.getBackupProcessor() != null;
}
public int getAsyncBackupCount() {
return mapContainer.getAsyncBackupCount();
}
public int getSyncBackupCount() {
return mapContainer.getBackupCount();
}
private long getLatencyFrom(long begin) {
return Clock.currentTimeMillis() - begin;
}
}