private CompletableFuture<Void> visitSecondPhaseCommand(
TxInvocationContext ctx,
TransactionBoundaryCommand command,
boolean commit,
ExtendedStatistic duration,
ExtendedStatistic counter)
throws Throwable {
GlobalTransaction globalTransaction = command.getGlobalTransaction();
if (trace) {
log.tracef(
"Visit 2nd phase command %s. Is it local? %s. Transaction is %s",
command, ctx.isOriginLocal(), globalTransaction.globalId());
}
long start = timeService.time();
return ctx.onReturn(
(rCtx, rCommand, rv, throwable) -> {
if (throwable != null) {
throw throwable;
}
long end = timeService.time();
updateTime(duration, counter, start, end, globalTransaction, rCtx.isOriginLocal());
cacheStatisticManager.setTransactionOutcome(
commit, globalTransaction, rCtx.isOriginLocal());
cacheStatisticManager.terminateTransaction(globalTransaction, true, true);
return null;
});
}
public void cleanupTimedOutTransactions() {
if (trace)
log.tracef(
"About to cleanup remote transactions older than %d ms",
configuration.transaction().completedTxTimeout());
long beginning = timeService.time();
long cutoffCreationTime =
beginning - TimeUnit.MILLISECONDS.toNanos(configuration.transaction().completedTxTimeout());
List<GlobalTransaction> toKill = new ArrayList<>();
// Check remote transactions.
for (Map.Entry<GlobalTransaction, RemoteTransaction> e : remoteTransactions.entrySet()) {
GlobalTransaction gtx = e.getKey();
RemoteTransaction remoteTx = e.getValue();
if (remoteTx != null) {
if (trace) log.tracef("Checking transaction %s", gtx);
// Check the time.
if (remoteTx.getCreationTime() - cutoffCreationTime < 0) {
long duration =
timeService.timeDuration(
remoteTx.getCreationTime(), beginning, TimeUnit.MILLISECONDS);
log.remoteTransactionTimeout(gtx, duration);
toKill.add(gtx);
}
}
}
// Rollback the orphaned transactions and release any held locks.
for (GlobalTransaction gtx : toKill) {
killTransaction(gtx);
}
}
public void cleanupCompletedTransactions() {
if (!completedTransactions.isEmpty()) {
try {
log.tracef(
"About to cleanup completed transaction. Initial size is %d",
completedTransactions.size());
// this iterator is weekly consistent and will never throw ConcurrentModificationException
Iterator<Map.Entry<GlobalTransaction, Long>> iterator =
completedTransactions.entrySet().iterator();
long timeout = configuration.transaction().completedTxTimeout();
int removedEntries = 0;
long beginning = timeService.time();
while (iterator.hasNext()) {
Map.Entry<GlobalTransaction, Long> e = iterator.next();
long ageMillis = timeService.timeDuration(e.getValue(), TimeUnit.MILLISECONDS);
if (ageMillis >= timeout) {
iterator.remove();
removedEntries++;
}
}
long duration = timeService.timeDuration(beginning, TimeUnit.MILLISECONDS);
log.tracef(
"Finished cleaning up completed transactions. %d transactions were removed, total duration was %d millis, "
+ "current number of completed transactions is %d",
removedEntries, duration, completedTransactions.size());
} catch (Exception e) {
log.errorf(e, "Failed to cleanup completed transactions: %s", e.getMessage());
}
}
}
@Override
public void setStatisticsEnabled(boolean enabled) {
this.statisticsEnabled = enabled;
if (enabled) {
// yes technically we do not reset stats but we initialize them
resetNanoseconds.set(ts.time());
}
}
@Override
public CompletableFuture<Void> visitGetAllCommand(InvocationContext ctx, GetAllCommand command)
throws Throwable {
if (trace) {
log.tracef(
"Visit Get All Command %s. Is it in transaction scope? %s. Is it local? %s",
command, ctx.isInTxScope(), ctx.isOriginLocal());
}
if (!ctx.isInTxScope()) {
return ctx.continueInvocation();
}
long start = timeService.time();
return ctx.onReturn(
(rCtx, rCommand, rv, throwable) -> {
if (throwable != null) {
throw throwable;
}
long end = timeService.time();
initStatsIfNecessary(rCtx);
int numRemote = 0;
Collection<?> keys = ((GetAllCommand) rCommand).getKeys();
for (Object key : keys) {
if (isRemote(key)) numRemote++;
}
// TODO: tbh this seems like it doesn't work properly for statistics as each
// one will have the duration of all the time for all gets... Maybe do an average
// instead ? Either way this isn't very indicative
if (numRemote > 0) {
cacheStatisticManager.add(
NUM_REMOTE_GET, numRemote, getGlobalTransaction(rCtx), rCtx.isOriginLocal());
cacheStatisticManager.add(
REMOTE_GET_EXECUTION,
timeService.timeDuration(start, end, NANOSECONDS),
getGlobalTransaction(rCtx),
rCtx.isOriginLocal());
}
cacheStatisticManager.add(
ALL_GET_EXECUTION,
timeService.timeDuration(start, end, NANOSECONDS),
getGlobalTransaction(rCtx),
rCtx.isOriginLocal());
cacheStatisticManager.add(
NUM_GET, keys.size(), getGlobalTransaction(rCtx), rCtx.isOriginLocal());
return null;
});
}
@Override
public <KOut, VOut> Map<KOut, VOut> reduce(ReduceCommand<KOut, VOut> reduceCommand)
throws InterruptedException {
Cache<?, ?> cache = cacheManager.getCache(reduceCommand.getCacheName());
Set<KOut> keys = reduceCommand.getKeys();
String taskId = reduceCommand.getTaskId();
Reducer<KOut, VOut> reducer = reduceCommand.getReducer();
boolean useIntermediateKeys = reduceCommand.isEmitCompositeIntermediateKeys();
boolean noInputKeys = keys == null || keys.isEmpty();
Cache<Object, List<VOut>> tmpCache = cacheManager.getCache(reduceCommand.getCacheName());
Map<KOut, VOut> result = new HashMap<KOut, VOut>();
if (noInputKeys) {
// illegal state, raise exception
throw new IllegalStateException(
"Reduce phase of MapReduceTask "
+ taskId
+ " on node "
+ cdl.getAddress()
+ " executed with empty input keys");
} else {
// first hook into lifecycle
MapReduceTaskLifecycleService taskLifecycleService =
MapReduceTaskLifecycleService.getInstance();
log.tracef("For m/r task %s invoking %s at %s", taskId, reduceCommand, cdl.getAddress());
int interruptCount = 0;
long start = log.isTraceEnabled() ? timeService.time() : 0;
try {
taskLifecycleService.onPreExecute(reducer, cache);
for (KOut key : keys) {
interruptCount++;
if (checkInterrupt(interruptCount++) && Thread.currentThread().isInterrupted())
throw new InterruptedException();
// load result value from map phase
List<VOut> value;
if (useIntermediateKeys) {
value = tmpCache.get(new IntermediateCompositeKey<KOut>(taskId, key));
} else {
value = tmpCache.get(key);
}
// and reduce it
VOut reduced = reducer.reduce(key, value.iterator());
result.put(key, reduced);
log.tracef(
"For m/r task %s reduced %s to %s at %s ", taskId, key, reduced, cdl.getAddress());
}
} finally {
if (log.isTraceEnabled()) {
log.tracef(
"Reduce for task %s took %s milliseconds",
reduceCommand.getTaskId(), timeService.timeDuration(start, TimeUnit.MILLISECONDS));
}
taskLifecycleService.onPostExecute(reducer);
}
}
return result;
}
@Override
@ManagedOperation(
description = "Resets statistics gathered by this component",
displayName = "Reset statistics")
public void resetStatistics() {
if (isStatisticsEnabled()) {
reset();
resetNanoseconds.set(ts.time());
}
}
@Override
public MarshalledEntry load(Object key) {
if (!isValidKeyType(key)) {
return null;
}
EntityManager em = emf.createEntityManager();
try {
EntityTransaction txn = em.getTransaction();
long txnBegin = timeService.time();
txn.begin();
try {
long entityFindBegin = timeService.time();
Object entity = em.find(configuration.entityClass(), key);
stats.addEntityFind(timeService.time() - entityFindBegin);
try {
if (entity == null) return null;
InternalMetadata m = null;
if (configuration.storeMetadata()) {
byte[] keyBytes;
try {
keyBytes = marshaller.objectToByteBuffer(key);
} catch (Exception e) {
throw new JpaStoreException("Failed to marshall key", e);
}
long metadataFindBegin = timeService.time();
MetadataEntity metadata = em.find(MetadataEntity.class, keyBytes);
stats.addMetadataFind(timeService.time() - metadataFindBegin);
if (metadata != null && metadata.getMetadata() != null) {
try {
m = (InternalMetadata) marshaller.objectFromByteBuffer(metadata.getMetadata());
} catch (Exception e) {
throw new JpaStoreException("Failed to unmarshall metadata", e);
}
if (m.isExpired(timeService.wallClockTime())) {
return null;
}
}
}
if (trace) log.trace("Loaded " + entity + " (" + m + ")");
return marshallerEntryFactory.newMarshalledEntry(key, entity, m);
} finally {
try {
txn.commit();
stats.addReadTxCommitted(timeService.time() - txnBegin);
} catch (Exception e) {
stats.addReadTxFailed(timeService.time() - txnBegin);
throw new JpaStoreException("Failed to load entry", e);
}
}
} finally {
if (txn != null && txn.isActive()) txn.rollback();
}
} finally {
em.close();
}
}
@Override
public void write(MarshalledEntry entry) {
EntityManager em = emf.createEntityManager();
Object entity = entry.getValue();
MetadataEntity metadata =
configuration.storeMetadata()
? new MetadataEntity(
entry.getKeyBytes(),
entry.getMetadataBytes(),
entry.getMetadata() == null ? Long.MAX_VALUE : entry.getMetadata().expiryTime())
: null;
try {
if (!configuration.entityClass().isAssignableFrom(entity.getClass())) {
throw new JpaStoreException(
String.format(
"This cache is configured with JPA CacheStore to only store values of type %s - cannot write %s = %s",
configuration.entityClass().getName(), entity, entity.getClass().getName()));
} else {
EntityTransaction txn = em.getTransaction();
Object id = emf.getPersistenceUnitUtil().getIdentifier(entity);
if (!entry.getKey().equals(id)) {
throw new JpaStoreException(
"Entity id value must equal to key of cache entry: "
+ "key = ["
+ entry.getKey()
+ "], id = ["
+ id
+ "]");
}
long txnBegin = timeService.time();
try {
if (trace) log.trace("Writing " + entity + "(" + toString(metadata) + ")");
txn.begin();
long entityMergeBegin = timeService.time();
em.merge(entity);
stats.addEntityMerge(timeService.time() - entityMergeBegin);
if (metadata != null && metadata.hasBytes()) {
long metadataMergeBegin = timeService.time();
em.merge(metadata);
stats.addMetadataMerge(timeService.time() - metadataMergeBegin);
}
txn.commit();
stats.addWriteTxCommited(timeService.time() - txnBegin);
} catch (Exception e) {
stats.addWriteTxFailed(timeService.time() - txnBegin);
throw new JpaStoreException("Exception caught in write()", e);
} finally {
if (txn != null && txn.isActive()) txn.rollback();
}
}
} finally {
em.close();
}
}
@Override
public CompletableFuture<Void> visitPrepareCommand(
TxInvocationContext ctx, PrepareCommand command) throws Throwable {
GlobalTransaction globalTransaction = command.getGlobalTransaction();
if (trace) {
log.tracef(
"Visit Prepare command %s. Is it local?. Transaction is %s",
command, ctx.isOriginLocal(), globalTransaction.globalId());
}
initStatsIfNecessary(ctx);
cacheStatisticManager.onPrepareCommand(globalTransaction, ctx.isOriginLocal());
if (command.hasModifications()) {
cacheStatisticManager.markAsWriteTransaction(globalTransaction, ctx.isOriginLocal());
}
long start = timeService.time();
return ctx.onReturn(
(rCtx, rCommand, rv, throwable) -> {
if (throwable != null) {
processWriteException(rCtx, globalTransaction, throwable);
} else {
long end = timeService.time();
updateTime(
PREPARE_EXECUTION_TIME,
NUM_PREPARE_COMMAND,
start,
end,
globalTransaction,
rCtx.isOriginLocal());
}
if (((PrepareCommand) rCommand).isOnePhaseCommit()) {
boolean local = rCtx.isOriginLocal();
boolean success = throwable == null;
cacheStatisticManager.setTransactionOutcome(
success, globalTransaction, rCtx.isOriginLocal());
cacheStatisticManager.terminateTransaction(globalTransaction, local, !local);
}
return null;
});
}
@Override
public CompletableFuture<Void> visitGetKeyValueCommand(
InvocationContext ctx, GetKeyValueCommand command) throws Throwable {
if (trace) {
log.tracef(
"Visit Get Key Value command %s. Is it in transaction scope? %s. Is it local? %s",
command, ctx.isInTxScope(), ctx.isOriginLocal());
}
if (!ctx.isInTxScope()) {
return ctx.continueInvocation();
}
long start = timeService.time();
return ctx.onReturn(
(rCtx, rCommand, rv, throwable) -> {
if (throwable != null) {
throw throwable;
}
long end = timeService.time();
initStatsIfNecessary(rCtx);
Object key = ((GetKeyValueCommand) rCommand).getKey();
if (isRemote(key)) {
cacheStatisticManager.increment(
NUM_REMOTE_GET, getGlobalTransaction(rCtx), rCtx.isOriginLocal());
cacheStatisticManager.add(
REMOTE_GET_EXECUTION,
timeService.timeDuration(start, end, NANOSECONDS),
getGlobalTransaction(rCtx),
rCtx.isOriginLocal());
}
cacheStatisticManager.add(
ALL_GET_EXECUTION,
timeService.timeDuration(start, end, NANOSECONDS),
getGlobalTransaction(rCtx),
rCtx.isOriginLocal());
cacheStatisticManager.increment(
NUM_GET, getGlobalTransaction(rCtx), rCtx.isOriginLocal());
return null;
});
}
private synchronized void fetchClusterWideStatsIfNeeded() {
if (launchNewDistTask()) {
try {
List<CompletableFuture<Map<String, Number>>> responseList =
des.submitEverywhere(new DistributedCacheStatsCallable());
updateFieldsFromResponseMap(responseList);
} catch (Exception e) {
log.warn("Could not execute cluster wide cache stats operation ", e);
} finally {
statsUpdateTimestamp = ts.time();
}
}
}
private CompletableFuture<Void> visitWriteCommand(
InvocationContext ctx, WriteCommand command, Object key) throws Throwable {
if (trace) {
log.tracef(
"Visit write command %s. Is it in transaction scope? %s. Is it local? %s",
command, ctx.isInTxScope(), ctx.isOriginLocal());
}
if (!ctx.isInTxScope()) {
return ctx.continueInvocation();
}
long start = timeService.time();
return ctx.onReturn(
(rCtx, rCommand, rv, throwable) -> {
long end = timeService.time();
initStatsIfNecessary(rCtx);
if (throwable != null) {
processWriteException(rCtx, getGlobalTransaction(rCtx), throwable);
} else {
if (isRemote(key)) {
cacheStatisticManager.add(
REMOTE_PUT_EXECUTION,
timeService.timeDuration(start, end, NANOSECONDS),
getGlobalTransaction(rCtx),
rCtx.isOriginLocal());
cacheStatisticManager.increment(
NUM_REMOTE_PUT, getGlobalTransaction(rCtx), rCtx.isOriginLocal());
}
}
cacheStatisticManager.increment(
NUM_PUT, getGlobalTransaction(rCtx), rCtx.isOriginLocal());
cacheStatisticManager.markAsWriteTransaction(
getGlobalTransaction(rCtx), rCtx.isOriginLocal());
return null;
});
}
private <KIn, VIn, KOut, VOut> Map<KOut, List<VOut>> combineForLocalReduction(
MapCombineCommand<KIn, VIn, KOut, VOut> mcc, CollectableCollector<KOut, VOut> collector) {
String taskId = mcc.getTaskId();
Reducer<KOut, VOut> combiner = mcc.getCombiner();
Map<KOut, List<VOut>> result = null;
if (combiner != null) {
result = new HashMap<KOut, List<VOut>>();
log.tracef("For m/r task %s invoking combiner %s at %s", taskId, mcc, cdl.getAddress());
MapReduceTaskLifecycleService taskLifecycleService =
MapReduceTaskLifecycleService.getInstance();
long start = log.isTraceEnabled() ? timeService.time() : 0;
try {
Cache<?, ?> cache = cacheManager.getCache(mcc.getCacheName());
taskLifecycleService.onPreExecute(combiner, cache);
Map<KOut, List<VOut>> collectedValues = collector.collectedValues();
for (Entry<KOut, List<VOut>> e : collectedValues.entrySet()) {
VOut combined;
List<VOut> list = e.getValue();
List<VOut> l = new LinkedList<VOut>();
if (list.size() > 1) {
combined = combiner.reduce(e.getKey(), list.iterator());
} else {
combined = list.get(0);
}
l.add(combined);
result.put(e.getKey(), l);
log.tracef(
"For m/r task %s combined %s to %s at %s",
taskId, e.getKey(), combined, cdl.getAddress());
}
} finally {
if (log.isTraceEnabled()) {
log.tracef(
"Combine for task %s took %s milliseconds",
mcc.getTaskId(), timeService.timeDuration(start, TimeUnit.MILLISECONDS));
}
taskLifecycleService.onPostExecute(combiner);
}
} else {
// Combiner not specified
result = collector.collectedValues();
}
return result;
}
@Override
public boolean contains(Object key) {
if (!isValidKeyType(key)) {
return false;
}
EntityManager em = emf.createEntityManager();
try {
EntityTransaction txn = em.getTransaction();
long txnBegin = timeService.time();
txn.begin();
try {
long entityFindBegin = timeService.time();
Object entity = em.find(configuration.entityClass(), key);
stats.addEntityFind(timeService.time() - entityFindBegin);
if (trace) log.trace("Entity " + key + " -> " + entity);
try {
if (entity == null) return false;
if (configuration.storeMetadata()) {
byte[] keyBytes;
try {
keyBytes = marshaller.objectToByteBuffer(key);
} catch (Exception e) {
throw new JpaStoreException("Cannot marshall key", e);
}
long metadataFindBegin = timeService.time();
MetadataEntity metadata = em.find(MetadataEntity.class, keyBytes);
stats.addMetadataFind(timeService.time() - metadataFindBegin);
if (trace) log.trace("Metadata " + key + " -> " + toString(metadata));
return metadata == null || metadata.expiration > timeService.wallClockTime();
} else {
return true;
}
} finally {
txn.commit();
stats.addReadTxCommitted(timeService.time() - txnBegin);
}
} catch (RuntimeException e) {
stats.addReadTxFailed(timeService.time() - txnBegin);
throw e;
} finally {
if (txn != null && txn.isActive()) txn.rollback();
}
} finally {
em.close();
}
}
protected <KIn, VIn, KOut, VOut> CollectableCollector<KOut, VOut> map(
MapCombineCommand<KIn, VIn, KOut, VOut> mcc) throws InterruptedException {
Cache<KIn, VIn> cache = cacheManager.getCache(mcc.getCacheName());
Set<KIn> keys = mcc.getKeys();
Set<KIn> inputKeysCopy = null;
Mapper<KIn, VIn, KOut, VOut> mapper = mcc.getMapper();
DistributionManager dm = cache.getAdvancedCache().getDistributionManager();
boolean inputKeysSpecified = keys != null && !keys.isEmpty();
Set<KIn> inputKeys = keys;
if (!inputKeysSpecified) {
inputKeys = filterLocalPrimaryOwner(cache.keySet(), dm);
} else {
inputKeysCopy = new HashSet<KIn>(keys);
}
// hook map function into lifecycle and execute it
MapReduceTaskLifecycleService taskLifecycleService =
MapReduceTaskLifecycleService.getInstance();
DefaultCollector<KOut, VOut> collector = new DefaultCollector<KOut, VOut>();
log.tracef("For m/r task %s invoking %s with input keys %s", mcc.getTaskId(), mcc, inputKeys);
int interruptCount = 0;
long start = log.isTraceEnabled() ? timeService.time() : 0;
try {
taskLifecycleService.onPreExecute(mapper, cache);
for (KIn key : inputKeys) {
if (checkInterrupt(interruptCount++) && Thread.currentThread().isInterrupted())
throw new InterruptedException();
VIn value = cache.get(key);
mapper.map(key, value, collector);
if (inputKeysSpecified) {
inputKeysCopy.remove(key);
}
}
Set<KIn> keysFromCacheLoader = null;
if (inputKeysSpecified) {
// load only specified remaining input keys - iff in CL and pinned to this primary owner
keysFromCacheLoader = filterLocalPrimaryOwner(inputKeysCopy, dm);
} else {
// load everything from CL pinned to this primary owner
keysFromCacheLoader =
filterLocalPrimaryOwner(loadAllKeysFromCacheLoaderUsingFilter(inputKeys), dm);
}
log.tracef(
"For m/r task %s cache loader input keys %s", mcc.getTaskId(), keysFromCacheLoader);
interruptCount = 0;
for (KIn key : keysFromCacheLoader) {
if (checkInterrupt(interruptCount++) && Thread.currentThread().isInterrupted())
throw new InterruptedException();
VIn value = loadValueFromCacheLoader(key);
if (value != null) {
mapper.map(key, value, collector);
}
}
} finally {
if (log.isTraceEnabled()) {
log.tracef(
"Map phase for task %s took %s milliseconds",
mcc.getTaskId(), timeService.timeDuration(start, TimeUnit.MILLISECONDS));
}
taskLifecycleService.onPostExecute(mapper);
}
return collector;
}
@Override
public void purge(Executor threadPool, final PurgeListener listener) {
ExecutorAllCompletionService eacs = new ExecutorAllCompletionService(threadPool);
EntityManager em = emf.createEntityManager();
try {
CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<MetadataEntity> cq = cb.createQuery(MetadataEntity.class);
Root root = cq.from(MetadataEntity.class);
long currentTime = timeService.wallClockTime();
cq.where(cb.le(root.get(MetadataEntity.EXPIRATION), currentTime));
for (MetadataEntity metadata : em.createQuery(cq).getResultList()) {
EntityTransaction txn = em.getTransaction();
final Object key;
try {
key = marshaller.objectFromByteBuffer(metadata.name);
} catch (Exception e) {
throw new JpaStoreException("Cannot unmarshall key", e);
}
long txnBegin = timeService.time();
txn.begin();
try {
long metadataFindBegin = timeService.time();
metadata = em.find(MetadataEntity.class, metadata.name);
stats.addMetadataFind(timeService.time() - metadataFindBegin);
// check for transaction - I hope write skew check is done here
if (metadata.expiration > currentTime) {
txn.rollback();
continue;
}
long entityFindBegin = timeService.time();
Object entity = em.find(configuration.entityClass(), key);
stats.addEntityFind(timeService.time() - entityFindBegin);
if (entity != null) { // the entry may have been removed
long entityRemoveBegin = timeService.time();
em.remove(entity);
stats.addEntityRemove(timeService.time() - entityRemoveBegin);
}
long metadataRemoveBegin = timeService.time();
em.remove(metadata);
stats.addMetadataRemove(timeService.time() - metadataRemoveBegin);
txn.commit();
stats.addRemoveTxCommitted(timeService.time() - txnBegin);
if (trace) log.trace("Expired " + key + " -> " + entity + "(" + toString(metadata) + ")");
if (listener != null) {
eacs.submit(
new Runnable() {
@Override
public void run() {
listener.entryPurged(key);
}
},
null);
}
} catch (RuntimeException e) {
stats.addRemoveTxFailed(timeService.time() - txnBegin);
throw e;
} finally {
if (txn != null && txn.isActive()) {
txn.rollback();
}
}
}
} finally {
em.close();
}
eacs.waitUntilAllCompleted();
if (eacs.isExceptionThrown()) {
throw new JpaStoreException(eacs.getFirstException());
}
}
private boolean launchNewDistTask() {
long duration = ts.timeDuration(statsUpdateTimestamp, ts.time(), TimeUnit.MILLISECONDS);
return duration > staleStatsTreshold;
}
/**
* With the current state transfer implementation it is possible for a transaction to be prepared
* several times on a remote node. This might cause leaks, e.g. if the transaction is prepared,
* committed and prepared again. Once marked as completed (because of commit or rollback) any
* further prepare received on that transaction are discarded.
*/
public void markTransactionCompleted(GlobalTransaction globalTx) {
if (totalOrder) {
return;
}
completedTransactions.put(globalTx, timeService.time());
}
protected <KIn, VIn, KOut, VOut> Set<KOut> combine(
MapCombineCommand<KIn, VIn, KOut, VOut> mcc, CollectableCollector<KOut, VOut> collector)
throws Exception {
String taskId = mcc.getTaskId();
boolean emitCompositeIntermediateKeys = mcc.isEmitCompositeIntermediateKeys();
Reducer<KOut, VOut> combiner = mcc.getCombiner();
Set<KOut> mapPhaseKeys = new HashSet<KOut>();
Cache<Object, DeltaAwareList<VOut>> tmpCache = null;
if (emitCompositeIntermediateKeys) {
tmpCache = cacheManager.getCache(DEFAULT_TMP_CACHE_CONFIGURATION_NAME);
} else {
tmpCache = cacheManager.getCache(taskId);
}
if (tmpCache == null) {
throw new IllegalStateException(
"Temporary cache for MapReduceTask " + taskId + " not found on " + cdl.getAddress());
}
DistributionManager dm = tmpCache.getAdvancedCache().getDistributionManager();
if (combiner != null) {
Cache<?, ?> cache = cacheManager.getCache(mcc.getCacheName());
log.tracef("For m/r task %s invoking combiner %s at %s", taskId, mcc, cdl.getAddress());
MapReduceTaskLifecycleService taskLifecycleService =
MapReduceTaskLifecycleService.getInstance();
Map<KOut, VOut> combinedMap = new ConcurrentHashMap<KOut, VOut>();
long start = log.isTraceEnabled() ? timeService.time() : 0;
try {
taskLifecycleService.onPreExecute(combiner, cache);
Map<KOut, List<VOut>> collectedValues = collector.collectedValues();
for (Entry<KOut, List<VOut>> e : collectedValues.entrySet()) {
List<VOut> list = e.getValue();
VOut combined;
if (list.size() > 1) {
combined = combiner.reduce(e.getKey(), list.iterator());
combinedMap.put(e.getKey(), combined);
} else {
combined = list.get(0);
combinedMap.put(e.getKey(), combined);
}
log.tracef(
"For m/r task %s combined %s to %s at %s",
taskId, e.getKey(), combined, cdl.getAddress());
}
} finally {
if (log.isTraceEnabled()) {
log.tracef(
"Combine for task %s took %s milliseconds",
mcc.getTaskId(), timeService.timeDuration(start, TimeUnit.MILLISECONDS));
}
taskLifecycleService.onPostExecute(combiner);
}
Map<Address, List<KOut>> keysToNodes =
mapKeysToNodes(dm, taskId, combinedMap.keySet(), emitCompositeIntermediateKeys);
start = log.isTraceEnabled() ? timeService.time() : 0;
try {
for (Entry<Address, List<KOut>> entry : keysToNodes.entrySet()) {
List<KOut> keysHashedToAddress = entry.getValue();
try {
log.tracef(
"For m/r task %s migrating intermediate keys %s to %s",
taskId, keysHashedToAddress, entry.getKey());
for (KOut key : keysHashedToAddress) {
VOut value = combinedMap.get(key);
DeltaAwareList<VOut> delta = new DeltaAwareList<VOut>(value);
if (emitCompositeIntermediateKeys) {
tmpCache.put(new IntermediateCompositeKey<KOut>(taskId, key), delta);
} else {
tmpCache.put(key, delta);
}
mapPhaseKeys.add(key);
}
} catch (Exception e) {
throw new CacheException(
"Could not move intermediate keys/values for M/R task " + taskId, e);
}
}
} finally {
if (log.isTraceEnabled()) {
log.tracef(
"Migrating keys for task %s took %s milliseconds (Migrated %s keys)",
mcc.getTaskId(),
timeService.timeDuration(start, TimeUnit.MILLISECONDS),
mapPhaseKeys.size());
}
}
} else {
// Combiner not specified so lets insert each key/uncombined-List pair into tmp cache
Map<KOut, List<VOut>> collectedValues = collector.collectedValues();
Map<Address, List<KOut>> keysToNodes =
mapKeysToNodes(dm, taskId, collectedValues.keySet(), emitCompositeIntermediateKeys);
long start = log.isTraceEnabled() ? timeService.time() : 0;
try {
for (Entry<Address, List<KOut>> entry : keysToNodes.entrySet()) {
List<KOut> keysHashedToAddress = entry.getValue();
try {
log.tracef(
"For m/r task %s migrating intermediate keys %s to %s",
taskId, keysHashedToAddress, entry.getKey());
for (KOut key : keysHashedToAddress) {
List<VOut> value = collectedValues.get(key);
DeltaAwareList<VOut> delta = new DeltaAwareList<VOut>(value);
if (emitCompositeIntermediateKeys) {
tmpCache.put(new IntermediateCompositeKey<KOut>(taskId, key), delta);
} else {
tmpCache.put(key, delta);
}
mapPhaseKeys.add(key);
}
} catch (Exception e) {
throw new CacheException(
"Could not move intermediate keys/values for M/R task " + taskId, e);
}
}
} finally {
if (log.isTraceEnabled()) {
log.tracef(
"Migrating keys for task %s took %s milliseconds (Migrated %s keys)",
mcc.getTaskId(),
timeService.timeDuration(start, TimeUnit.MILLISECONDS),
mapPhaseKeys.size());
}
}
}
return mapPhaseKeys;
}
public boolean delete(Object key) {
if (!isValidKeyType(key)) {
return false;
}
EntityManager em = emf.createEntityManager();
try {
long entityFindBegin = timeService.time();
Object entity = em.find(configuration.entityClass(), key);
stats.addEntityFind(timeService.time() - entityFindBegin);
if (entity == null) {
return false;
}
MetadataEntity metadata = null;
if (configuration.storeMetadata()) {
byte[] keyBytes;
try {
keyBytes = marshaller.objectToByteBuffer(key);
} catch (Exception e) {
throw new JpaStoreException("Failed to marshall key", e);
}
long metadataFindBegin = timeService.time();
metadata = em.find(MetadataEntity.class, keyBytes);
stats.addMetadataFind(timeService.time() - metadataFindBegin);
}
EntityTransaction txn = em.getTransaction();
if (trace) log.trace("Removing " + entity + "(" + toString(metadata) + ")");
long txnBegin = timeService.time();
txn.begin();
try {
long entityRemoveBegin = timeService.time();
em.remove(entity);
stats.addEntityRemove(timeService.time() - entityRemoveBegin);
if (metadata != null) {
long metadataRemoveBegin = timeService.time();
em.remove(metadata);
stats.addMetadataRemove(timeService.time() - metadataRemoveBegin);
}
txn.commit();
stats.addRemoveTxCommitted(timeService.time() - txnBegin);
return true;
} catch (Exception e) {
stats.addRemoveTxFailed(timeService.time() - txnBegin);
throw new JpaStoreException("Exception caught in delete()", e);
} finally {
if (txn != null && txn.isActive()) txn.rollback();
}
} finally {
em.close();
}
}
