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* as indicated by the @author tags. See the copyright.txt file in the
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*
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* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
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*
* This software is distributed in the hope that it will be useful,
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
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package org.infinispan.interceptors;
import org.infinispan.commands.AbstractVisitor;
import org.infinispan.commands.VisitableCommand;
import org.infinispan.commands.tx.CommitCommand;
import org.infinispan.commands.tx.PrepareCommand;
import org.infinispan.commands.tx.RollbackCommand;
import org.infinispan.commands.write.ClearCommand;
import org.infinispan.commands.write.PutKeyValueCommand;
import org.infinispan.commands.write.PutMapCommand;
import org.infinispan.commands.write.RemoveCommand;
import org.infinispan.commands.write.ReplaceCommand;
import org.infinispan.commands.write.WriteCommand;
import org.infinispan.config.CacheLoaderManagerConfig;
import org.infinispan.container.entries.CacheEntry;
import org.infinispan.container.entries.InternalCacheEntry;
import org.infinispan.container.entries.InternalEntryFactory;
import org.infinispan.context.Flag;
import org.infinispan.context.InvocationContext;
import org.infinispan.context.impl.TxInvocationContext;
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.loaders.CacheLoaderManager;
import org.infinispan.loaders.CacheStore;
import org.infinispan.loaders.modifications.Clear;
import org.infinispan.loaders.modifications.Modification;
import org.infinispan.loaders.modifications.Remove;
import org.infinispan.loaders.modifications.Store;
import org.infinispan.transaction.xa.GlobalTransaction;
import org.infinispan.util.logging.LogFactory;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicLong;
/**
* 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.
*
* @author Bela Ban
* @since 4.0
*/
@MBean(objectName = "CacheStore", description = "Component that handles storing of entries to a CacheStore from memory.")
public class CacheStoreInterceptor extends JmxStatsCommandInterceptor {
CacheLoaderManagerConfig loaderConfig = null;
private Map<GlobalTransaction, Integer> txStores;
private Map<GlobalTransaction, Set<Object>> preparingTxs;
final AtomicLong cacheStores = new AtomicLong(0);
CacheStore store;
private CacheLoaderManager loaderManager;
public CacheStoreInterceptor() {
log = LogFactory.getLog(getClass());
trace = log.isTraceEnabled();
}
@Inject
protected void init(CacheLoaderManager loaderManager) {
this.loaderManager = loaderManager;
}
@Start(priority = 15)
protected void start() {
store = loaderManager.getCacheStore();
this.setStatisticsEnabled(configuration.isExposeJmxStatistics());
loaderConfig = configuration.getCacheLoaderManagerConfig();
txStores = new ConcurrentHashMap<GlobalTransaction, Integer>(64, 0.75f, configuration.getConcurrencyLevel());
preparingTxs = new ConcurrentHashMap<GlobalTransaction, Set<Object>>(64, 0.75f, configuration.getConcurrencyLevel());
}
/**
* if this is a shared cache loader and the call is of remote origin, pass up the chain
*/
public final boolean skip(InvocationContext ctx, VisitableCommand command) {
if (store == null) return true; // could be because the cache loader oes not implement cache store
if ((!ctx.isOriginLocal() && loaderConfig.isShared()) || ctx.hasFlag(Flag.SKIP_CACHE_STORE)) {
if (trace) log.trace("Passing up method call and bypassing this interceptor since the cache loader is shared and this call originated remotely.");
return true;
}
return false;
}
@Override
public Object visitCommitCommand(TxInvocationContext ctx, CommitCommand command) throws Throwable {
if (!skip(ctx, command)) {
if (ctx.hasModifications()) {
// this is a commit call.
GlobalTransaction tx = ctx.getGlobalTransaction();
if (trace) log.trace("Calling loader.commit() for transaction {0}", tx);
try {
store.commit(tx);
}
catch (Throwable t) {
preparingTxs.remove(tx);
throw t;
}
if (getStatisticsEnabled()) {
Integer puts = txStores.get(tx);
if (puts != null) {
cacheStores.getAndAdd(puts);
}
txStores.remove(tx);
}
return invokeNextInterceptor(ctx, command);
} else {
if (trace) log.trace("Commit called with no modifications; ignoring.");
}
}
return invokeNextInterceptor(ctx, command);
}
@Override
public Object visitRollbackCommand(TxInvocationContext ctx, RollbackCommand command) throws Throwable {
if (!skip(ctx, command)) {
if (trace) log.trace("transactional so don't put stuff in the cloader yet.");
if (ctx.hasModifications()) {
GlobalTransaction tx = ctx.getGlobalTransaction();
// this is a rollback method
if (preparingTxs.containsKey(tx)) {
preparingTxs.remove(tx);
store.rollback(tx);
}
if (getStatisticsEnabled()) txStores.remove(tx);
} else {
if (trace) log.trace("Rollback called with no modifications; ignoring.");
}
}
return invokeNextInterceptor(ctx, command);
}
@Override
public Object visitPrepareCommand(TxInvocationContext ctx, PrepareCommand command) throws Throwable {
if (!skip(ctx, command)) {
if (trace) log.trace("transactional so don't put stuff in the cloader yet.");
prepareCacheLoader(ctx, command.getGlobalTransaction(), ctx, command.isOnePhaseCommit());
}
return invokeNextInterceptor(ctx, command);
}
@Override
public Object visitRemoveCommand(InvocationContext ctx, RemoveCommand command) throws Throwable {
Object retval = invokeNextInterceptor(ctx, command);
if (!skip(ctx, command) && !ctx.isInTxScope() && command.isSuccessful()) {
Object key = command.getKey();
boolean resp = store.remove(key);
if (trace) log.trace("Removed entry under key {0} and got response {1} from CacheStore", key, resp);
}
return retval;
}
@Override
public Object visitClearCommand(InvocationContext ctx, ClearCommand command) throws Throwable {
if (!skip(ctx, command) && !ctx.isInTxScope()) {
store.clear();
if (trace) log.trace("Cleared cache store");
}
return invokeNextInterceptor(ctx, command);
}
@Override
public Object visitPutKeyValueCommand(InvocationContext ctx, PutKeyValueCommand command) throws Throwable {
Object returnValue = invokeNextInterceptor(ctx, command);
if (skip(ctx, command) || ctx.isInTxScope() || !command.isSuccessful()) return returnValue;
Object key = command.getKey();
InternalCacheEntry se = getStoredEntry(key, ctx);
store.store(se);
if (trace) log.trace("Stored entry {0} under key {1}", se, key);
if (getStatisticsEnabled()) cacheStores.incrementAndGet();
return returnValue;
}
@Override
public Object visitReplaceCommand(InvocationContext ctx, ReplaceCommand command) throws Throwable {
Object returnValue = invokeNextInterceptor(ctx, command);
if (skip(ctx, command) || ctx.isInTxScope() || !command.isSuccessful()) return returnValue;
Object key = command.getKey();
InternalCacheEntry se = getStoredEntry(key, ctx);
store.store(se);
if (trace) log.trace("Stored entry {0} under key {1}", se, key);
if (getStatisticsEnabled()) cacheStores.incrementAndGet();
return returnValue;
}
@Override
public Object visitPutMapCommand(InvocationContext ctx, PutMapCommand command) throws Throwable {
Object returnValue = invokeNextInterceptor(ctx, command);
if (skip(ctx, command) || ctx.isInTxScope()) return returnValue;
Map<Object, Object> map = command.getMap();
for (Object key : map.keySet()) {
InternalCacheEntry se = getStoredEntry(key, ctx);
store.store(se);
if (trace) log.trace("Stored entry {0} under key {1}", se, key);
}
if (getStatisticsEnabled()) cacheStores.getAndAdd(map.size());
return returnValue;
}
private void prepareCacheLoader(TxInvocationContext ctx, GlobalTransaction gtx, TxInvocationContext transactionContext, boolean onePhase) throws Throwable {
if (transactionContext == null) {
throw new Exception("transactionContext for transaction " + gtx + " not found in transaction table");
}
List<WriteCommand> modifications = transactionContext.getModifications();
if (modifications.size() == 0) {
if (trace) log.trace("Transaction has not logged any modifications!");
return;
}
if (trace) log.trace("Cache loader modification list: {0}", modifications);
StoreModificationsBuilder modsBuilder = new StoreModificationsBuilder(getStatisticsEnabled());
for (WriteCommand cacheCommand : modifications) cacheCommand.acceptVisitor(ctx, modsBuilder);
int numMods = modsBuilder.modifications.size();
if (trace) log.trace("Converted method calls to cache loader modifications. List size: {0}", numMods);
if (numMods > 0) {
GlobalTransaction tx = transactionContext.getGlobalTransaction();
store.prepare(modsBuilder.modifications, tx, onePhase);
preparingTxs.put(tx, modsBuilder.affectedKeys);
if (getStatisticsEnabled() && modsBuilder.putCount > 0) {
txStores.put(tx, modsBuilder.putCount);
}
}
}
public class StoreModificationsBuilder extends AbstractVisitor {
boolean generateStatistics;
int putCount;
Set<Object> affectedKeys = new HashSet<Object>();
List<Modification> modifications = new ArrayList<Modification>();
public StoreModificationsBuilder(boolean generateStatistics) {
this.generateStatistics = generateStatistics;
}
@Override
@SuppressWarnings("unchecked")
public Object visitPutKeyValueCommand(InvocationContext ctx, PutKeyValueCommand command) throws Throwable {
if (generateStatistics) putCount++;
modifications.add(new Store(getStoredEntry(command.getKey(), ctx)));
affectedKeys.add(command.getKey());
return null;
}
@Override
@SuppressWarnings("unchecked")
public Object visitPutMapCommand(InvocationContext ctx, PutMapCommand command) throws Throwable {
Map<Object, Object> map = command.getMap();
if (generateStatistics) putCount += map.size();
affectedKeys.addAll(map.keySet());
for (Object key : map.keySet()) modifications.add(new Store(getStoredEntry(key, ctx)));
return null;
}
@Override
@SuppressWarnings("unchecked")
public Object visitRemoveCommand(InvocationContext ctx, RemoveCommand command) throws Throwable {
modifications.add(new Remove(command.getKey()));
affectedKeys.add(command.getKey());
return null;
}
@Override
@SuppressWarnings("unchecked")
public Object visitClearCommand(InvocationContext ctx, ClearCommand command) throws Throwable {
modifications.add(new Clear());
return null;
}
}
@ManagedOperation(description = "Resets statistics gathered by this component")
public void resetStatistics() {
cacheStores.set(0);
}
@ManagedAttribute(description = "number of cache loader stores")
public long getCacheLoaderStores() {
return cacheStores.get();
}
InternalCacheEntry getStoredEntry(Object key, InvocationContext ctx) {
CacheEntry entry = ctx.lookupEntry(key);
if (entry instanceof InternalCacheEntry) {
return (InternalCacheEntry) entry;
} else {
return InternalEntryFactory.create(entry.getKey(), entry.getValue(), entry.getLifespan(), entry.getMaxIdle());
}
}
}