package org.infinispan.interceptors;
import org.infinispan.atomic.impl.AtomicHashMap;
import org.infinispan.commands.AbstractVisitor;
import org.infinispan.commands.FlagAffectedCommand;
import org.infinispan.commands.tx.CommitCommand;
import org.infinispan.commands.tx.PrepareCommand;
import org.infinispan.commands.write.*;
import org.infinispan.commons.marshall.StreamingMarshaller;
import org.infinispan.configuration.cache.PersistenceConfiguration;
import org.infinispan.container.InternalEntryFactory;
import org.infinispan.container.entries.CacheEntry;
import org.infinispan.container.entries.DeltaAwareCacheEntry;
import org.infinispan.container.entries.InternalCacheEntry;
import org.infinispan.container.entries.InternalCacheValue;
import org.infinispan.container.versioning.EntryVersion;
import org.infinispan.container.versioning.EntryVersionsMap;
import org.infinispan.context.Flag;
import org.infinispan.context.InvocationContext;
import org.infinispan.context.impl.TxInvocationContext;
import org.infinispan.factories.annotations.ComponentName;
import org.infinispan.factories.annotations.Inject;
import org.infinispan.factories.annotations.Start;
import org.infinispan.interceptors.base.JmxStatsCommandInterceptor;
import org.infinispan.jmx.annotations.MBean;
import org.infinispan.jmx.annotations.ManagedAttribute;
import org.infinispan.jmx.annotations.ManagedOperation;
import org.infinispan.jmx.annotations.MeasurementType;
import org.infinispan.persistence.manager.PersistenceManager;
import org.infinispan.marshall.core.MarshalledEntryImpl;
import org.infinispan.metadata.EmbeddedMetadata;
import org.infinispan.metadata.Metadata;
import org.infinispan.transaction.xa.GlobalTransaction;
import org.infinispan.util.logging.Log;
import org.infinispan.util.logging.LogFactory;
import javax.transaction.InvalidTransactionException;
import javax.transaction.SystemException;
import javax.transaction.Transaction;
import javax.transaction.TransactionManager;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;
import static org.infinispan.factories.KnownComponentNames.CACHE_MARSHALLER;
import static org.infinispan.persistence.PersistenceUtil.internalMetadata;
import static org.infinispan.persistence.manager.PersistenceManager.AccessMode.BOTH;
import static org.infinispan.persistence.manager.PersistenceManager.AccessMode.PRIVATE;
/**
* Writes modifications back to the store on the way out: stores modifications back through the CacheLoader, either
* after each method call (no TXs), or at TX commit.
*
* Only used for LOCAL and INVALIDATION caches.
*
* @author Bela Ban
* @author Dan Berindei
* @author Mircea Markus
* @since 4.0
*/
@MBean(objectName = "CacheStore", description = "Component that handles storing of entries to a CacheStore from memory.")
public class CacheWriterInterceptor extends JmxStatsCommandInterceptor {
PersistenceConfiguration loaderConfig = null;
final AtomicLong cacheStores = new AtomicLong(0);
protected PersistenceManager persistenceManager;
private InternalEntryFactory entryFactory;
private TransactionManager transactionManager;
private StreamingMarshaller marshaller;
protected volatile boolean enabled = true;
private static final Log log = LogFactory.getLog(CacheWriterInterceptor.class);
@Override
protected Log getLog() {
return log;
}
@Inject
protected void init(PersistenceManager pm, InternalEntryFactory entryFactory, TransactionManager transactionManager,
@ComponentName(CACHE_MARSHALLER) StreamingMarshaller marshaller) {
this.persistenceManager = pm;
this.entryFactory = entryFactory;
this.transactionManager = transactionManager;
this.marshaller = marshaller;
}
@Start(priority = 15)
protected void start() {
this.setStatisticsEnabled(cacheConfiguration.jmxStatistics().enabled());
loaderConfig = cacheConfiguration.persistence();
}
@Override
public Object visitCommitCommand(TxInvocationContext ctx, CommitCommand command) throws Throwable {
if (isStoreEnabled())
commitCommand(ctx);
return invokeNextInterceptor(ctx, command);
}
@Override
public Object visitPrepareCommand(TxInvocationContext ctx, PrepareCommand command) throws Throwable {
if (isStoreEnabled() && command.isOnePhaseCommit()) {
commitCommand(ctx);
}
return invokeNextInterceptor(ctx, command);
}
protected void commitCommand(TxInvocationContext ctx) throws Throwable {
if (!ctx.getCacheTransaction().getAllModifications().isEmpty()) {
// this is a commit call.
GlobalTransaction tx = ctx.getGlobalTransaction();
if (getLog().isTraceEnabled()) getLog().tracef("Calling loader.commit() for transaction %s", tx);
Transaction xaTx = null;
try {
xaTx = suspendRunningTx(ctx);
store(ctx);
} finally {
resumeRunningTx(xaTx);
}
} else {
if (getLog().isTraceEnabled()) getLog().trace("Commit called with no modifications; ignoring.");
}
}
private void resumeRunningTx(Transaction xaTx) throws InvalidTransactionException, SystemException {
if (transactionManager != null && xaTx != null) {
transactionManager.resume(xaTx);
}
}
private Transaction suspendRunningTx(TxInvocationContext ctx) throws SystemException {
Transaction xaTx = null;
if (transactionManager != null) {
xaTx = transactionManager.suspend();
if (xaTx != null && !ctx.isOriginLocal())
throw new IllegalStateException("It is only possible to be in the context of an JRA transaction in the local node.");
}
return xaTx;
}
@Override
public Object visitRemoveCommand(InvocationContext ctx, RemoveCommand command) throws Throwable {
Object retval = invokeNextInterceptor(ctx, command);
if (!isStoreEnabled(command) || ctx.isInTxScope() || !command.isSuccessful()) return retval;
if (!isProperWriter(ctx, command, command.getKey())) return retval;
Object key = command.getKey();
boolean resp = persistenceManager.deleteFromAllStores(key, BOTH);
if (getLog().isTraceEnabled()) getLog().tracef("Removed entry under key %s and got response %s from CacheStore", key, resp);
return retval;
}
@Override
public Object visitClearCommand(InvocationContext ctx, ClearCommand command) throws Throwable {
if (isStoreEnabled(command) && !ctx.isInTxScope())
persistenceManager.clearAllStores(ctx.isOriginLocal() ? BOTH : PRIVATE);
return invokeNextInterceptor(ctx, command);
}
@Override
public Object visitPutKeyValueCommand(InvocationContext ctx, PutKeyValueCommand command) throws Throwable {
Object returnValue = invokeNextInterceptor(ctx, command);
if (!isStoreEnabled(command) || ctx.isInTxScope() || !command.isSuccessful()) return returnValue;
if (!isProperWriter(ctx, command, command.getKey())) return returnValue;
Object key = command.getKey();
storeEntry(ctx, key, command);
if (getStatisticsEnabled()) cacheStores.incrementAndGet();
return returnValue;
}
@Override
public Object visitReplaceCommand(InvocationContext ctx, ReplaceCommand command) throws Throwable {
Object returnValue = invokeNextInterceptor(ctx, command);
if (!isStoreEnabled(command) || ctx.isInTxScope() || !command.isSuccessful()) return returnValue;
if (!isProperWriter(ctx, command, command.getKey())) return returnValue;
Object key = command.getKey();
storeEntry(ctx, key, command);
if (getStatisticsEnabled()) cacheStores.incrementAndGet();
return returnValue;
}
@Override
public Object visitPutMapCommand(InvocationContext ctx, PutMapCommand command) throws Throwable {
Object returnValue = invokeNextInterceptor(ctx, command);
if (!isStoreEnabled(command) || ctx.isInTxScope()) return returnValue;
Map<Object, Object> map = command.getMap();
for (Object key : map.keySet()) {
if (isProperWriter(ctx, command, key)) {
storeEntry(ctx, key, command);
}
}
if (getStatisticsEnabled()) cacheStores.getAndAdd(map.size());
return returnValue;
}
protected final void store(TxInvocationContext ctx) throws Throwable {
List<WriteCommand> modifications = ctx.getCacheTransaction().getAllModifications();
if (modifications.isEmpty()) {
if (getLog().isTraceEnabled()) getLog().trace("Transaction has not logged any modifications!");
return;
}
if (getLog().isTraceEnabled()) getLog().tracef("Cache loader modification list: %s", modifications);
Updater modsBuilder = new Updater(getStatisticsEnabled());
for (WriteCommand cacheCommand : modifications) {
if (isStoreEnabled(cacheCommand)) {
cacheCommand.acceptVisitor(ctx, modsBuilder);
}
}
if (getStatisticsEnabled() && modsBuilder.putCount > 0) {
cacheStores.getAndAdd(modsBuilder.putCount);
}
}
protected boolean isStoreEnabled() {
return enabled;
}
protected boolean isStoreEnabled(FlagAffectedCommand command) {
if (!isStoreEnabled())
return false;
if (command.hasFlag(Flag.SKIP_CACHE_STORE)) {
log.trace("Skipping cache store since the call contain a skip cache store flag");
return false;
}
return true;
}
protected boolean isProperWriter(InvocationContext ctx, FlagAffectedCommand command, Object key) {
return true;
}
public class Updater extends AbstractVisitor {
protected final boolean generateStatistics;
int putCount;
public Updater(boolean generateStatistics) {
this.generateStatistics = generateStatistics;
}
@Override
public Object visitPutKeyValueCommand(InvocationContext ctx, PutKeyValueCommand command) throws Throwable {
return visitSingleStore(ctx, command, command.getKey());
}
@Override
public Object visitApplyDeltaCommand(InvocationContext ctx, ApplyDeltaCommand command) throws Throwable {
if (isProperWriter(ctx, command, command.getKey())) {
if (generateStatistics) putCount++;
CacheEntry entry = ctx.lookupEntry(command.getKey());
InternalCacheEntry ice;
if (entry instanceof InternalCacheEntry) {
ice = (InternalCacheEntry) entry;
} else if (entry instanceof DeltaAwareCacheEntry) {
AtomicHashMap<?,?> uncommittedChanges = ((DeltaAwareCacheEntry) entry).getUncommittedChages();
ice = entryFactory.create(entry.getKey(), uncommittedChanges, entry.getMetadata(), entry.getLifespan(), entry.getMaxIdle());
} else {
ice = entryFactory.create(entry);
}
MarshalledEntryImpl marshalledEntry = new MarshalledEntryImpl(ice.getKey(), ice.getValue(), internalMetadata(ice), marshaller);
persistenceManager.writeToAllStores(marshalledEntry, command.hasFlag(Flag.SKIP_SHARED_CACHE_STORE) ? PRIVATE : BOTH);
}
return null;
}
@Override
public Object visitReplaceCommand(InvocationContext ctx, ReplaceCommand command) throws Throwable {
return visitSingleStore(ctx, command, command.getKey());
}
@Override
public Object visitPutMapCommand(InvocationContext ctx, PutMapCommand command) throws Throwable {
Map<Object, Object> map = command.getMap();
for (Object key : map.keySet())
visitSingleStore(ctx, command, key);
return null;
}
@Override
public Object visitRemoveCommand(InvocationContext ctx, RemoveCommand command) throws Throwable {
Object key = command.getKey();
if (isProperWriter(ctx, command, key)) {
persistenceManager.deleteFromAllStores(key, BOTH);
}
return null;
}
@Override
public Object visitClearCommand(InvocationContext ctx, ClearCommand command) throws Throwable {
persistenceManager.clearAllStores(ctx.isOriginLocal() ? PRIVATE : BOTH);
return null;
}
protected Object visitSingleStore(InvocationContext ctx, FlagAffectedCommand command, Object key) throws Throwable {
if (isProperWriter(ctx, command, key)) {
if (generateStatistics) putCount++;
InternalCacheValue sv = getStoredValue(key, ctx);
MarshalledEntryImpl me = new MarshalledEntryImpl(key, sv.getValue(), internalMetadata(sv), marshaller);
persistenceManager.writeToAllStores(me, command.hasFlag(Flag.SKIP_SHARED_CACHE_STORE) ? PRIVATE : BOTH);
}
return null;
}
}
@Override
@ManagedOperation(
description = "Resets statistics gathered by this component",
displayName = "Reset statistics"
)
public void resetStatistics() {
cacheStores.set(0);
}
@ManagedAttribute(
description = "Number of writes to the store",
displayName = "Number of writes to the store",
measurementType = MeasurementType.TRENDSUP
)
public long getWritesToTheStores() {
return cacheStores.get();
}
void storeEntry(InvocationContext ctx, Object key, FlagAffectedCommand command) {
InternalCacheValue sv = getStoredValue(key, ctx);
persistenceManager.writeToAllStores(new MarshalledEntryImpl(key, sv.getValue(), internalMetadata(sv), marshaller),
skipSharedStores(ctx, key, command) ? PRIVATE : BOTH);
if (getLog().isTraceEnabled()) getLog().tracef("Stored entry %s under key %s", sv, key);
}
protected boolean skipSharedStores(InvocationContext ctx, Object key, FlagAffectedCommand command) {
return !ctx.isOriginLocal() || command.hasFlag(Flag.SKIP_SHARED_CACHE_STORE);
}
InternalCacheValue getStoredValue(Object key, InvocationContext ctx) {
CacheEntry entry = ctx.lookupEntry(key);
if (entry instanceof InternalCacheEntry) {
return ((InternalCacheEntry) entry).toInternalCacheValue();
} else {
if (ctx.isInTxScope()) {
EntryVersionsMap updatedVersions =
((TxInvocationContext) ctx).getCacheTransaction().getUpdatedEntryVersions();
if (updatedVersions != null) {
EntryVersion version = updatedVersions.get(entry.getKey());
if (version != null) {
Metadata metadata = entry.getMetadata();
if (metadata == null) {
// If no metadata passed, assumed embedded metadata
metadata = new EmbeddedMetadata.Builder()
.lifespan(entry.getLifespan()).maxIdle(entry.getMaxIdle())
.version(version).build();
return entryFactory.create(entry.getKey(), entry.getValue(), metadata).toInternalCacheValue();
} else {
metadata = metadata.builder().version(version).build();
return entryFactory.create(entry.getKey(), entry.getValue(), metadata).toInternalCacheValue();
}
}
}
}
return entryFactory.create(entry).toInternalCacheValue();
}
}
public void disableInterceptor() {
enabled = false;
}
}