/**
* Convenience method to retrieve field values from an L2 cached object if they are loaded in that
* object. If the object is not in the L2 cache then just returns, and similarly if the required
* fields aren't available.
*
* @param fieldNumbers Numbers of fields to load from the L2 cache
* @return The fields that couldn't be loaded
*/
protected int[] loadFieldsFromLevel2Cache(int[] fieldNumbers) {
// Only continue if there are fields, and not being deleted/flushed etc
if (fieldNumbers == null
|| fieldNumbers.length == 0
|| myEC.isFlushing()
|| myLC.isDeleted()
|| isDeleting()
|| getExecutionContext().getTransaction().isCommitting()) {
return fieldNumbers;
}
// TODO Drop this check when we're confident that this doesn't affect some use-cases
if (!myEC.getNucleusContext()
.getConfiguration()
.getBooleanProperty(PropertyNames.PROPERTY_CACHE_L2_LOADFIELDS, true)) {
return fieldNumbers;
}
Level2Cache l2cache = myEC.getNucleusContext().getLevel2Cache();
if (l2cache != null && myEC.getNucleusContext().isClassCacheable(cmd)) {
CachedPC<T> cachedPC = l2cache.get(myID);
if (cachedPC != null) {
int[] cacheFieldsToLoad =
ClassUtils.getFlagsSetTo(cachedPC.getLoadedFields(), fieldNumbers, true);
if (cacheFieldsToLoad != null && cacheFieldsToLoad.length > 0) {
if (NucleusLogger.CACHE.isDebugEnabled()) {
NucleusLogger.CACHE.debug(
Localiser.msg(
"026034",
StringUtils.toJVMIDString(getObject()),
myID,
StringUtils.intArrayToString(cacheFieldsToLoad)));
}
L2CacheRetrieveFieldManager l2RetFM = new L2CacheRetrieveFieldManager(this, cachedPC);
this.replaceFields(cacheFieldsToLoad, l2RetFM);
int[] fieldsNotLoaded = l2RetFM.getFieldsNotLoaded();
if (fieldsNotLoaded != null) {
for (int i = 0; i < fieldsNotLoaded.length; i++) {
loadedFields[fieldsNotLoaded[i]] = false;
}
}
}
}
}
return ClassUtils.getFlagsSetTo(loadedFields, fieldNumbers, false);
}
/**
* Convenience method to update a Level2 cached version of this object if cacheable and has not
* been modified during this transaction.
*
* @param fieldNumbers Numbers of fields to update in L2 cached object
*/
protected void updateLevel2CacheForFields(int[] fieldNumbers) {
String updateMode = (String) myEC.getProperty(PropertyNames.PROPERTY_CACHE_L2_UPDATE_MODE);
if (updateMode != null && updateMode.equalsIgnoreCase("commit-only")) {
return;
}
if (fieldNumbers == null || fieldNumbers.length == 0) {
return;
}
Level2Cache l2cache = myEC.getNucleusContext().getLevel2Cache();
if (l2cache != null
&& myEC.getNucleusContext().isClassCacheable(cmd)
&& !myEC.isObjectModifiedInTransaction(myID)) {
CachedPC<T> cachedPC = l2cache.get(myID);
if (cachedPC != null) {
// This originally just updated the L2 cache for fields where the L2 cache didn't have a
// value for that field, like this
/*
int[] cacheFieldsToLoad = ClassUtils.getFlagsSetTo(cachedPC.getLoadedFields(), fieldNumbers, false);
if (cacheFieldsToLoad == null || cacheFieldsToLoad.length == 0)
{
return;
}
*/
int[] cacheFieldsToLoad = fieldNumbers;
CachedPC copyCachedPC = cachedPC.getCopy();
if (NucleusLogger.CACHE.isDebugEnabled()) {
NucleusLogger.CACHE.debug(
Localiser.msg(
"026033",
StringUtils.toJVMIDString(getObject()),
myID,
StringUtils.intArrayToString(cacheFieldsToLoad)));
}
provideFields(cacheFieldsToLoad, new L2CachePopulateFieldManager(this, copyCachedPC));
// Replace the current L2 cached object with this one
myEC.getNucleusContext().getLevel2Cache().put(getInternalObjectId(), copyCachedPC);
}
}
}
