@Override
public final CacheEntry wrapEntryForReading(InvocationContext ctx, Object key)
throws InterruptedException {
CacheEntry cacheEntry = getFromContext(ctx, key);
if (cacheEntry == null) {
cacheEntry = getFromContainer(key);
// do not bother wrapping though if this is not in a tx. repeatable read etc are all
// meaningless unless there is a tx.
if (useRepeatableRead) {
MVCCEntry mvccEntry =
cacheEntry == null
? createWrappedEntry(key, null, null, false, false, -1)
: createWrappedEntry(
key,
cacheEntry.getValue(),
cacheEntry.getVersion(),
false,
false,
cacheEntry.getLifespan());
if (mvccEntry != null) ctx.putLookedUpEntry(key, mvccEntry);
return mvccEntry;
} else if (cacheEntry
!= null) { // if not in transaction and repeatable read, or simply read committed
// (regardless of whether in TX or not), do not wrap
ctx.putLookedUpEntry(key, cacheEntry);
}
return cacheEntry;
}
return cacheEntry;
}
@Override
public final MVCCEntry wrapEntryForRemove(InvocationContext ctx, Object key)
throws InterruptedException {
CacheEntry cacheEntry = getFromContext(ctx, key);
MVCCEntry mvccEntry = null;
if (cacheEntry != null) {
if (cacheEntry instanceof MVCCEntry && !(cacheEntry instanceof NullMarkerEntry)) {
mvccEntry = (MVCCEntry) cacheEntry;
} else {
mvccEntry = wrapMvccEntryForRemove(ctx, key, cacheEntry);
}
} else {
InternalCacheEntry ice = getFromContainer(key);
if (ice != null) {
mvccEntry = wrapInternalCacheEntryForPut(ctx, key, ice);
}
}
if (mvccEntry == null) {
// make sure we record this! Null value since this is a forced lock on the key
ctx.putLookedUpEntry(key, null);
} else {
mvccEntry.copyForUpdate(container, localModeWriteSkewCheck);
}
return mvccEntry;
}
private MVCCEntry newMvccEntryForPut(InvocationContext ctx, Object key) {
MVCCEntry mvccEntry;
if (trace) log.trace("Creating new entry.");
notifier.notifyCacheEntryCreated(key, true, ctx);
mvccEntry = createWrappedEntry(key, null, null, true, false, -1);
mvccEntry.setCreated(true);
ctx.putLookedUpEntry(key, mvccEntry);
notifier.notifyCacheEntryCreated(key, false, ctx);
return mvccEntry;
}
@Override
public final MVCCEntry wrapEntryForReplace(InvocationContext ctx, Object key)
throws InterruptedException {
MVCCEntry mvccEntry = wrapEntry(ctx, key);
if (mvccEntry == null) {
// make sure we record this! Null value since this is a forced lock on the key
ctx.putLookedUpEntry(key, null);
}
return mvccEntry;
}
private Object realRemoteGet(
InvocationContext ctx, Object key, boolean storeInL1, boolean isWrite) throws Throwable {
if (trace) log.tracef("Doing a remote get for key %s", key);
boolean acquireRemoteLock = false;
if (ctx.isInTxScope()) {
TxInvocationContext txContext = (TxInvocationContext) ctx;
acquireRemoteLock =
isWrite && isPessimisticCache && !txContext.getAffectedKeys().contains(key);
}
// attempt a remote lookup
InternalCacheEntry ice = dm.retrieveFromRemoteSource(key, ctx, acquireRemoteLock);
if (acquireRemoteLock) {
((TxInvocationContext) ctx).addAffectedKey(key);
}
if (ice != null) {
if (storeInL1) {
if (isL1CacheEnabled) {
if (trace) log.tracef("Caching remotely retrieved entry for key %s in L1", key);
// This should be fail-safe
try {
long lifespan =
ice.getLifespan() < 0
? configuration.getL1Lifespan()
: Math.min(ice.getLifespan(), configuration.getL1Lifespan());
PutKeyValueCommand put =
cf.buildPutKeyValueCommand(
ice.getKey(), ice.getValue(), lifespan, -1, ctx.getFlags());
lockAndWrap(ctx, key, ice);
invokeNextInterceptor(ctx, put);
} catch (Exception e) {
// Couldn't store in L1 for some reason. But don't fail the transaction!
log.infof("Unable to store entry %s in L1 cache", key);
log.debug("Inability to store in L1 caused by", e);
}
} else {
CacheEntry ce = ctx.lookupEntry(key);
if (ce == null || ce.isNull() || ce.isLockPlaceholder() || ce.getValue() == null) {
if (ce != null && ce.isChanged()) {
ce.setValue(ice.getValue());
} else {
if (isWrite) lockAndWrap(ctx, key, ice);
else ctx.putLookedUpEntry(key, ice);
}
}
}
} else {
if (trace) log.tracef("Not caching remotely retrieved entry for key %s in L1", key);
}
return ice.getValue();
}
return null;
}
private DeltaAwareCacheEntry wrapInternalCacheEntryForDelta(
InvocationContext ctx, Object key, CacheEntry cacheEntry) {
DeltaAwareCacheEntry e;
if (cacheEntry instanceof MVCCEntry) {
e = createWrappedDeltaEntry(key, (DeltaAware) cacheEntry.getValue(), cacheEntry);
} else {
e = createWrappedDeltaEntry(key, (DeltaAware) cacheEntry.getValue(), null);
}
ctx.putLookedUpEntry(key, e);
return e;
}
private MVCCEntry wrapMvccEntryForRemove(
InvocationContext ctx, Object key, CacheEntry cacheEntry) {
MVCCEntry mvccEntry =
createWrappedEntry(
key,
cacheEntry.getValue(),
cacheEntry.getVersion(),
false,
true,
cacheEntry.getLifespan());
ctx.putLookedUpEntry(key, mvccEntry);
return mvccEntry;
}
private DeltaAwareCacheEntry newDeltaAwareCacheEntry(
InvocationContext ctx, Object key, DeltaAware deltaAware) {
DeltaAwareCacheEntry deltaEntry = createWrappedDeltaEntry(key, deltaAware, null);
ctx.putLookedUpEntry(key, deltaEntry);
return deltaEntry;
}
