/**
* Goes direct to the shared cache in the absence of a transaction.
*
* <p>Where a transaction is present, a cache of removed items is lazily added to the thread and
* the <tt>Object</tt> put onto that.
*/
public void remove(K keyIn) {
final Serializable key = getTenantAwareCacheKey(keyIn);
// are we in a transaction?
if (AlfrescoTransactionSupport.getTransactionId() == null) // not in transaction
{
// no transaction
sharedCache.remove(key);
// done
if (isDebugEnabled) {
logger.debug(
"No transaction - removing item from shared cache: \n"
+ " cache: "
+ this
+ "\n"
+ " key: "
+ key);
}
} else // transaction present
{
TransactionData txnData = getTransactionData();
// Ensure that the cache isn't being modified
if (txnData.isClosed) {
if (isDebugEnabled) {
logger.debug("In post-commit remove: \n" + " cache: " + this + "\n" + " key: " + key);
}
} else if (isValueLocked(txnData, key)) {
// The key has been locked
if (isDebugEnabled) {
logger.debug(
"Ignoring remove after detecting locked key: \n"
+ " cache: "
+ this
+ "\n"
+ " key: "
+ key);
}
} else {
// is the shared cache going to be cleared?
if (txnData.isClearOn) {
// don't store removals if we're just going to clear it all out later
} else {
// are we in an overflow condition?
if (txnData.removedItemsCache.size() >= maxCacheSize) {
// overflow about to occur or has occured - we can only guarantee non-stale
// data by clearing the shared cache after the transaction. Also, the
// shared cache needs to be ignored for the rest of the transaction.
txnData.isClearOn = true;
if (!txnData.haveIssuedFullWarning) {
if (logger.isInfoEnabled()) {
Exception e = new Exception("Stack: ");
logger.info(
"Transactional removal cache '" + name + "' is full (" + maxCacheSize + ").",
e);
} else if (logger.isWarnEnabled()) {
logger.warn(
"Transactional removal cache '" + name + "' is full (" + maxCacheSize + ").");
}
txnData.haveIssuedFullWarning = true;
}
} else {
// Create a bucket to remove the value from the shared cache
txnData.removedItemsCache.add(key);
}
}
// remove the item from the udpated cache, if present
txnData.updatedItemsCache.remove(key);
// done
if (isDebugEnabled) {
logger.debug(
"In transaction - adding item direct to transactional removed cache: \n"
+ " cache: "
+ this
+ "\n"
+ " key: "
+ key);
}
}
}
}
/**
* Goes direct to the shared cache in the absence of a transaction.
*
* <p>Where a transaction is present, a cache of updated items is lazily added to the thread and
* the <tt>Object</tt> put onto that.
*/
public void put(K keyIn, V value) {
final Serializable key = getTenantAwareCacheKey(keyIn);
// are we in a transaction?
if (AlfrescoTransactionSupport.getTransactionId() == null) // not in transaction
{
// no transaction
TransactionalCache.putSharedCacheValue(sharedCache, key, value, null);
// done
if (isDebugEnabled) {
logger.debug(
"No transaction - adding item direct to shared cache: \n"
+ " cache: "
+ this
+ "\n"
+ " key: "
+ key
+ "\n"
+ " value: "
+ value);
}
} else // transaction present
{
TransactionData txnData = getTransactionData();
// Ensure that the cache isn't being modified
if (txnData.isClosed) {
if (isDebugEnabled) {
logger.debug(
"In post-commit add: \n"
+ " cache: "
+ this
+ "\n"
+ " key: "
+ key
+ "\n"
+ " value: "
+ value);
}
} else if (isValueLocked(txnData, key)) {
// The key has been locked
if (isDebugEnabled) {
logger.debug(
"Ignoring put after detecting locked key: \n"
+ " cache: "
+ this
+ "\n"
+ " key: "
+ key
+ "\n"
+ " value: "
+ value);
}
} else {
// we have an active transaction - add the item into the updated cache for this transaction
// are we in an overflow condition?
if (txnData.updatedItemsCache.hasHitSize()) {
// overflow about to occur or has occured - we can only guarantee non-stale
// data by clearing the shared cache after the transaction. Also, the
// shared cache needs to be ignored for the rest of the transaction.
txnData.isClearOn = true;
if (!txnData.haveIssuedFullWarning) {
if (logger.isInfoEnabled()) {
Exception e = new Exception("Stack: ");
logger.info(
"Transactional update cache '" + name + "' is full (" + maxCacheSize + ").", e);
} else if (logger.isWarnEnabled()) {
logger.warn(
"Transactional update cache '" + name + "' is full (" + maxCacheSize + ").");
}
txnData.haveIssuedFullWarning = true;
}
}
ValueHolder<V> existingValueHolder =
txnData.noSharedCacheRead ? null : sharedCache.get(key);
CacheBucket<V> bucket = null;
if (existingValueHolder == null) {
// ALF-5134: Performance of Alfresco cluster less than performance of single node
// The 'null' marker that used to be inserted also triggered an update in the afterCommit
// phase; the update triggered cache invalidation in the cluster. Now, the null cannot
// be verified to be the same null - there is no null equivalence
//
// The value didn't exist before
bucket = new NewCacheBucket<V>(value);
} else {
// Record the existing value as is
bucket = new UpdateCacheBucket<V>(existingValueHolder, value);
}
txnData.updatedItemsCache.put(key, bucket);
// remove the item from the removed cache, if present
txnData.removedItemsCache.remove(key);
// done
if (isDebugEnabled) {
logger.debug(
"In transaction - adding item direct to transactional update cache: \n"
+ " cache: "
+ this
+ "\n"
+ " key: "
+ key
+ "\n"
+ " value: "
+ value);
}
}
}
}
