/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* JBoss, Home of Professional Open Source
* Copyright 2010-2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.ogm.dialect.infinispan;
import static org.hibernate.ogm.datastore.spi.DefaultDatastoreNames.ASSOCIATION_STORE;
import static org.hibernate.ogm.datastore.spi.DefaultDatastoreNames.ENTITY_STORE;
import static org.hibernate.ogm.datastore.spi.DefaultDatastoreNames.IDENTIFIER_STORE;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import org.hibernate.LockMode;
import org.hibernate.dialect.lock.LockingStrategy;
import org.hibernate.dialect.lock.OptimisticForceIncrementLockingStrategy;
import org.hibernate.dialect.lock.OptimisticLockingStrategy;
import org.hibernate.dialect.lock.PessimisticForceIncrementLockingStrategy;
import org.hibernate.id.IntegralDataTypeHolder;
import org.hibernate.ogm.datastore.impl.EmptyTupleSnapshot;
import org.hibernate.ogm.datastore.impl.MapHelpers;
import org.hibernate.ogm.datastore.infinispan.impl.InfinispanDatastoreProvider;
import org.hibernate.ogm.datastore.map.impl.MapAssociationSnapshot;
import org.hibernate.ogm.datastore.spi.Association;
import org.hibernate.ogm.datastore.spi.AssociationContext;
import org.hibernate.ogm.datastore.spi.Tuple;
import org.hibernate.ogm.datastore.spi.TupleContext;
import org.hibernate.ogm.dialect.GridDialect;
import org.hibernate.ogm.grid.AssociationKey;
import org.hibernate.ogm.grid.EntityKey;
import org.hibernate.ogm.grid.EntityKeyMetadata;
import org.hibernate.ogm.grid.RowKey;
import org.hibernate.ogm.massindex.batchindexing.Consumer;
import org.hibernate.ogm.type.GridType;
import org.hibernate.persister.entity.Lockable;
import org.hibernate.type.Type;
import org.infinispan.AdvancedCache;
import org.infinispan.Cache;
import org.infinispan.atomic.AtomicMapLookup;
import org.infinispan.atomic.FineGrainedAtomicMap;
import org.infinispan.context.Flag;
import org.infinispan.distexec.mapreduce.Collector;
import org.infinispan.distexec.mapreduce.MapReduceTask;
import org.infinispan.distexec.mapreduce.Mapper;
import org.infinispan.distexec.mapreduce.Reducer;
/**
* @author Emmanuel Bernard
*/
public class InfinispanDialect implements GridDialect {
private final InfinispanDatastoreProvider provider;
public InfinispanDialect(InfinispanDatastoreProvider provider) {
this.provider = provider;
}
/**
* Get a strategy instance which knows how to acquire a database-level lock
* of the specified mode for this dialect.
*
* @param lockable The persister for the entity to be locked.
* @param lockMode The type of lock to be acquired.
* @return The appropriate locking strategy.
* @since 3.2
*/
@Override
public LockingStrategy getLockingStrategy(Lockable lockable, LockMode lockMode) {
if ( lockMode == LockMode.PESSIMISTIC_FORCE_INCREMENT ) {
return new PessimisticForceIncrementLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.PESSIMISTIC_WRITE ) {
return new InfinispanPessimisticWriteLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.PESSIMISTIC_READ ) {
// TODO find a more efficient pessimistic read
return new InfinispanPessimisticWriteLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.OPTIMISTIC ) {
return new OptimisticLockingStrategy( lockable, lockMode );
}
else if ( lockMode == LockMode.OPTIMISTIC_FORCE_INCREMENT ) {
return new OptimisticForceIncrementLockingStrategy( lockable, lockMode );
}
throw new UnsupportedOperationException( "LockMode " + lockMode
+ " is not supported by the Infinispan GridDialect" );
}
@Override
public Tuple getTuple(EntityKey key, TupleContext tupleContext) {
Cache<EntityKey, Map<String, Object>> cache = provider.getCache( ENTITY_STORE );
FineGrainedAtomicMap<String, Object> atomicMap = AtomicMapLookup.getFineGrainedAtomicMap( cache, key, false );
if ( atomicMap == null ) {
return null;
}
else {
return new Tuple( new InfinispanTupleSnapshot( atomicMap ) );
}
}
@Override
public Tuple createTuple(EntityKey key) {
//TODO we don't verify that it does not yet exist assuming that this has been done before by the calling code
//should we improve?
Cache<EntityKey, Map<String, Object>> cache = provider.getCache( ENTITY_STORE );
FineGrainedAtomicMap<String,Object> atomicMap = AtomicMapLookup.getFineGrainedAtomicMap( cache, key, true );
return new Tuple( new InfinispanTupleSnapshot( atomicMap ) );
}
@Override
public void updateTuple(Tuple tuple, EntityKey key) {
Map<String,Object> atomicMap = ( (InfinispanTupleSnapshot) tuple.getSnapshot() ).getAtomicMap();
MapHelpers.applyTupleOpsOnMap( tuple, atomicMap );
}
@Override
public void removeTuple(EntityKey key) {
Cache<EntityKey, Map<String, Object>> cache = provider.getCache( ENTITY_STORE );
AtomicMapLookup.removeAtomicMap( cache, key );
}
@Override
public Association getAssociation(AssociationKey key, AssociationContext associationContext) {
Cache<AssociationKey, Map<RowKey, Map<String, Object>>> cache = provider.getCache( ASSOCIATION_STORE );
Map<RowKey, Map<String, Object>> atomicMap = AtomicMapLookup.getFineGrainedAtomicMap( cache, key, false );
return atomicMap == null ? null : new Association( new MapAssociationSnapshot( atomicMap ) );
}
@Override
public Association createAssociation(AssociationKey key) {
//TODO we don't verify that it does not yet exist assuming that this ahs been done before by the calling code
//should we improve?
Cache<AssociationKey, Map<RowKey, Map<String, Object>>> cache = provider.getCache( ASSOCIATION_STORE );
Map<RowKey, Map<String, Object>> atomicMap = AtomicMapLookup.getFineGrainedAtomicMap( cache, key, true );
return new Association( new MapAssociationSnapshot( atomicMap ) );
}
@Override
public void updateAssociation(Association association, AssociationKey key) {
MapHelpers.updateAssociation( association, key );
}
@Override
public void removeAssociation(AssociationKey key) {
Cache<AssociationKey, Map<RowKey, Map<String, Object>>> cache = provider.getCache( ASSOCIATION_STORE );
AtomicMapLookup.removeAtomicMap( cache, key );
}
@Override
public Tuple createTupleAssociation(AssociationKey associationKey, RowKey rowKey) {
return new Tuple( EmptyTupleSnapshot.SINGLETON );
}
@Override
public void nextValue(RowKey key, IntegralDataTypeHolder value, int increment, int initialValue) {
final AdvancedCache<RowKey, Object> identifierCache = provider.getCache( IDENTIFIER_STORE ).getAdvancedCache();
boolean done = false;
do {
//read value
//skip locking proposed by Sanne
Object valueFromDb = identifierCache.withFlags( Flag.SKIP_LOCKING ).get( key );
if ( valueFromDb == null ) {
//if not there, insert initial value
value.initialize( initialValue );
//TODO should we use GridTypes here?
valueFromDb = new Long( value.makeValue().longValue() );
final Object oldValue = identifierCache.putIfAbsent( key, valueFromDb );
//check in case somebody has inserted it behind our back
if ( oldValue != null ) {
value.initialize( ( (Number) oldValue ).longValue() );
valueFromDb = oldValue;
}
}
else {
//read the value from the table
value.initialize( ( (Number) valueFromDb ).longValue() );
}
//update value
final IntegralDataTypeHolder updateValue = value.copy();
//increment value
updateValue.add( increment );
//TODO should we use GridTypes here?
final Object newValueFromDb = updateValue.makeValue();
done = identifierCache.replace( key, valueFromDb, newValueFromDb );
}
while ( !done );
}
@Override
public GridType overrideType(Type type) {
return null;
}
@Override
@SuppressWarnings("unchecked")
public void forEachTuple(Consumer consumer, EntityKeyMetadata... entityKeyMetadatas) {
Cache<EntityKey, Map<String, Object>> cache = provider.getCache( ENTITY_STORE );
Map<EntityKey, Map<String, Object>> queryResult = retrieveKeys( cache, entityKeyMetadatas );
for ( Entry<EntityKey, Map<String, Object>> entry : queryResult.entrySet() ) {
consumer.consume( getTuple( entry.getKey(), null ) );
}
}
private Map<EntityKey, Map<String, Object>> retrieveKeys(Cache<EntityKey, Map<String, Object>> cache, EntityKeyMetadata... entityKeyMetadatas) {
MapReduceTask<EntityKey, Map<String, Object>, EntityKey, Map<String, Object>> queryTask = new MapReduceTask<EntityKey, Map<String, Object>, EntityKey, Map<String, Object>>( cache );
queryTask.mappedWith( new TupleMapper( entityKeyMetadatas ) ).reducedWith( new TupleReducer() );
return queryTask.execute();
}
static class TupleMapper implements Mapper<EntityKey, Map<String, Object>, EntityKey, Map<String, Object>> {
private final EntityKeyMetadata[] entityKeyMetadatas;
public TupleMapper(EntityKeyMetadata... entityKeyMetadatas) {
this.entityKeyMetadatas = entityKeyMetadatas;
}
@Override
public void map(EntityKey key, Map<String, Object> value, Collector<EntityKey, Map<String, Object>> collector) {
for ( EntityKeyMetadata entityKeyMetadata : entityKeyMetadatas ) {
if ( key.getTable().equals( entityKeyMetadata.getTable() ) ) {
collector.emit( key, value );
}
}
}
}
static class TupleReducer implements Reducer<EntityKey, Map<String, Object>> {
@Override
public Map<String, Object> reduce(EntityKey reducedKey, Iterator<Map<String, Object>> iter) {
return iter.next();
}
}
}