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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.sdc.be.model.cache;
import fj.data.Either;
import lombok.Getter;
import org.apache.commons.lang3.concurrent.BasicThreadFactory;
import org.apache.commons.lang3.tuple.ImmutablePair;
import org.openecomp.sdc.be.config.BeEcompErrorManager;
import org.openecomp.sdc.be.config.BeEcompErrorManager.ErrorSeverity;
import org.openecomp.sdc.be.config.Configuration.ApplicationL1CacheConfig;
import org.openecomp.sdc.be.config.Configuration.ApplicationL1CacheInfo;
import org.openecomp.sdc.be.config.ConfigurationManager;
import org.openecomp.sdc.be.dao.janusgraph.JanusGraphOperationStatus;
import org.openecomp.sdc.be.datatypes.elements.DataTypeDataDefinition;
import org.openecomp.sdc.be.model.DataTypeDefinition;
import org.openecomp.sdc.be.model.operations.impl.PropertyOperation;
import org.openecomp.sdc.be.resources.data.DataTypeData;
import org.openecomp.sdc.common.log.wrappers.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.annotation.Resource;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.util.stream.Collectors;
@Component("application-datatype-cache")
public class ApplicationDataTypeCache implements ApplicationCache<DataTypeDefinition>, Runnable {
private static final String APPLICATION_DATA_TYPES_CACHE = "ApplicationDataTypesCache";
private final ReentrantReadWriteLock rwl = new ReentrantReadWriteLock();
private final Lock r = rwl.readLock();
private final Lock w = rwl.writeLock();
private Map<String, DataTypeDefinition> data = new HashMap<>();
private ScheduledExecutorService scheduledPollingService = Executors.newScheduledThreadPool(1,
new BasicThreadFactory.Builder().namingPattern("ApplicationDataTypeCacheThread-%d").build());
ScheduledFuture<?> scheduledFuture = null;
private static final Logger log = Logger.getLogger(ApplicationDataTypeCache.class.getName());
private int firstRunDelayInSec = 30;
private int pollingIntervalInSec = 60;
@Resource
private PropertyOperation propertyOperation;
@Autowired
private ApplicationEventPublisher applicationEventPublisher;
@PostConstruct
public void init() {
ApplicationL1CacheConfig applicationL1CacheConfig = ConfigurationManager.getConfigurationManager()
.getConfiguration().getApplicationL1Cache();
if (applicationL1CacheConfig != null) {
if (applicationL1CacheConfig.getDatatypes() != null) {
ApplicationL1CacheInfo datatypesInfo = applicationL1CacheConfig.getDatatypes();
if (datatypesInfo.getEnabled()) {
Integer intervalInSec = datatypesInfo.getPollIntervalInSec();
if (intervalInSec != null) {
pollingIntervalInSec = intervalInSec;
}
Integer firstRunDelay = datatypesInfo.getFirstRunDelay();
if (firstRunDelay != null) {
firstRunDelayInSec = firstRunDelay;
}
log.trace("ApplicationDataTypesCache polling interval is {} seconds.", pollingIntervalInSec);
if (scheduledPollingService != null) {
log.debug("Start ApplicationDataTypeCache polling task. polling interval {} seconds",
pollingIntervalInSec);
scheduledFuture = scheduledPollingService.scheduleAtFixedRate(this, firstRunDelayInSec,
pollingIntervalInSec, TimeUnit.SECONDS);
}
}
} else {
BeEcompErrorManager.getInstance().logInternalFlowError(APPLICATION_DATA_TYPES_CACHE, "Cache is disabled",
ErrorSeverity.INFO);
}
} else {
BeEcompErrorManager.getInstance().logInternalFlowError(APPLICATION_DATA_TYPES_CACHE, "Cache is disabled",
ErrorSeverity.INFO);
}
}
@PreDestroy
void destroy() {
if (scheduledFuture != null) {
boolean result = scheduledFuture.cancel(true);
log.debug("Stop polling task. result = {}", result);
scheduledFuture = null;
}
shutdownExecutor();
}
private void shutdownExecutor() {
if (scheduledPollingService == null)
return;
scheduledPollingService.shutdown(); // Disable new tasks from being
// submitted
try {
// Wait a while for existing tasks to terminate
if (!scheduledPollingService.awaitTermination(60, TimeUnit.SECONDS)) {
scheduledPollingService.shutdownNow(); // Cancel currently
// executing tasks
// Wait a while for tasks to respond to being cancelled
if (!scheduledPollingService.awaitTermination(60, TimeUnit.SECONDS))
log.debug("Pool did not terminate");
}
} catch (InterruptedException ie) {
// (Re-)Cancel if current thread also interrupted
scheduledPollingService.shutdownNow();
// Preserve interrupt status
Thread.currentThread().interrupt();
}
}
private Either<Map<String, DataTypeDefinition>, JanusGraphOperationStatus> getAllDataTypesFromGraph() {
return propertyOperation
.getAllDataTypes();
}
@Override
public Either<Map<String, DataTypeDefinition>, JanusGraphOperationStatus> getAll() {
try {
r.lock();
if (data == null || data.isEmpty()) {
return getAllDataTypesFromGraph();
}
return Either.left(data);
} finally {
r.unlock();
}
}
@Override
public Either<DataTypeDefinition, JanusGraphOperationStatus> get(String uniqueId) {
try {
r.lock();
if (data == null || data.isEmpty()) {
return propertyOperation
.getDataTypeByUid(uniqueId);
} else {
DataTypeDefinition dataTypeDefinition = data.values().stream()
.filter(p -> p.getUniqueId().equals(uniqueId)).findFirst().orElse(null);
if (dataTypeDefinition == null) {
return propertyOperation
.getDataTypeByUid(uniqueId);
} else {
return Either.left(dataTypeDefinition);
}
}
} finally {
r.unlock();
}
}
@Override
public void run() {
log.trace("run() method. polling db to fetch data types");
try {
Long start = System.currentTimeMillis();
log.trace("Start fetching all data types from db");
Either<List<DataTypeData>, JanusGraphOperationStatus> allDataTypeNodes = propertyOperation.getAllDataTypeNodes();
Long end = System.currentTimeMillis();
log.trace("Finish fetching all data types from db. Took {} Milliseconds", (end - start));
if (allDataTypeNodes.isRight()) {
JanusGraphOperationStatus status = allDataTypeNodes.right().value();
if (status != JanusGraphOperationStatus.OK) {
log.debug("ApplicationDataTypesCache - Failed to fetch all data types nodes");
BeEcompErrorManager.getInstance().logInternalConnectionError("FetchDataTypes",
"Failed to fetch data types from graph(cache)", ErrorSeverity.INFO);
}
} else {
List<DataTypeData> list = allDataTypeNodes.left().value();
if (list != null) {
Map<String, ImmutablePair<Long, Long>> dataTypeNameToModificationTime = list.stream()
.collect(Collectors.toMap(p -> p.getDataTypeDataDefinition().getName(),
p -> new ImmutablePair<>(p.getDataTypeDataDefinition().getCreationTime(),
p.getDataTypeDataDefinition().getModificationTime())));
Map<String, ImmutablePair<Long, Long>> currentDataTypeToModificationTime = new HashMap<>();
try {
r.lock();
if (data != null) {
currentDataTypeToModificationTime = data.values().stream().collect(Collectors.toMap(
DataTypeDataDefinition::getName,
p -> new ImmutablePair<>(p.getCreationTime(), p.getModificationTime())));
}
} finally {
r.unlock();
}
boolean isChanged = compareDataTypes(dataTypeNameToModificationTime,
currentDataTypeToModificationTime);
if (isChanged) {
replaceAllData();
}
}
}
} catch (Exception e) {
log.debug("unexpected error occured", e);
BeEcompErrorManager.getInstance().logInternalUnexpectedError(APPLICATION_DATA_TYPES_CACHE,
"Failed to run refresh data types job", ErrorSeverity.INFO);
} finally {
try {
propertyOperation.getJanusGraphGenericDao().commit();
} catch (Exception e) {
log.trace("Failed to commit ApplicationDataTypeCache", e);
}
}
}
private boolean compareDataTypes(Map<String, ImmutablePair<Long, Long>> dataTypeNameToModificationTime,
Map<String, ImmutablePair<Long, Long>> currentDataTypeToModificationTime) {
if (dataTypeNameToModificationTime.size() != currentDataTypeToModificationTime.size()) {
return true;
} else {
Set<String> currentkeySet = currentDataTypeToModificationTime.keySet();
Set<String> keySet = dataTypeNameToModificationTime.keySet();
if (currentkeySet.containsAll(keySet)) {
for (Entry<String, ImmutablePair<Long, Long>> entry : dataTypeNameToModificationTime.entrySet()) {
String dataTypeName = entry.getKey();
ImmutablePair<Long, Long> creationAndModificationTimes = entry.getValue();
long creationTime = creationAndModificationTimes.getLeft() == null ? 0
: creationAndModificationTimes.getLeft().longValue();
long modificationTime = creationAndModificationTimes.getRight() == null ? 0
: creationAndModificationTimes.getRight().longValue();
ImmutablePair<Long, Long> currentEntry = currentDataTypeToModificationTime.get(dataTypeName);
long currentCreationTime = currentEntry.getLeft() == null ? 0 : currentEntry.getLeft().longValue();
long currentModificationTime = currentEntry.getRight() == null ? 0
: currentEntry.getRight().longValue();
if (creationTime > currentCreationTime || modificationTime > currentModificationTime) {
log.debug("Datatype {} was updated. Creation Time {} vs {}. Modification Time {} vs {}",
dataTypeName, currentCreationTime, creationTime, currentModificationTime,
modificationTime);
return true;
}
}
} else {
return true;
}
}
return false;
}
private void replaceAllData() {
Either<Map<String, DataTypeDefinition>, JanusGraphOperationStatus> allDataTypes = propertyOperation
.getAllDataTypes();
if (allDataTypes.isRight()) {
JanusGraphOperationStatus status = allDataTypes.right().value();
log.debug("Failed to fetch all data types from db. Status is {}", status);
} else {
try {
w.lock();
data = allDataTypes.left().value();
// send notification on data types change
onDataChangeEventEmit(data);
BeEcompErrorManager.getInstance().logInternalFlowError("ReplaceDataTypesCache",
"Succeed to replace the data types cache", ErrorSeverity.INFO);
} finally {
w.unlock();
}
}
}
private void onDataChangeEventEmit(Map<String, DataTypeDefinition> newData) {
log.trace("Cache data has changed, sending event to all listening for this change.");
DataTypesCacheChangedEvent dataTypesCacheChangedEvent = new DataTypesCacheChangedEvent(this, newData);
applicationEventPublisher.publishEvent(dataTypesCacheChangedEvent);
}
/**
* Custom event to notify all interested in cached data changes
*/
public static class DataTypesCacheChangedEvent extends ApplicationEvent {
@Getter
private Map<String, DataTypeDefinition> newData;
public DataTypesCacheChangedEvent(Object source, Map<String, DataTypeDefinition> newData) {
super(source);
this.newData = newData;
}
}
}
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