/*
* Hibernate OGM, Domain model persistence for NoSQL datastores
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.ogm.datastore.infinispan;
import static org.hibernate.ogm.datastore.infinispan.impl.CacheNames.ASSOCIATION_CACHE;
import static org.hibernate.ogm.datastore.infinispan.impl.CacheNames.ENTITY_CACHE;
import static org.hibernate.ogm.datastore.infinispan.impl.CacheNames.IDENTIFIER_CACHE;
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.ogm.datastore.infinispan.dialect.impl.InfinispanPessimisticWriteLockingStrategy;
import org.hibernate.ogm.datastore.infinispan.dialect.impl.InfinispanTupleSnapshot;
import org.hibernate.ogm.datastore.infinispan.impl.InfinispanDatastoreProvider;
import org.hibernate.ogm.datastore.map.impl.MapAssociationSnapshot;
import org.hibernate.ogm.datastore.map.impl.MapHelpers;
import org.hibernate.ogm.dialect.spi.AssociationContext;
import org.hibernate.ogm.dialect.spi.AssociationTypeContext;
import org.hibernate.ogm.dialect.spi.BaseGridDialect;
import org.hibernate.ogm.dialect.spi.ModelConsumer;
import org.hibernate.ogm.dialect.spi.NextValueRequest;
import org.hibernate.ogm.dialect.spi.TupleContext;
import org.hibernate.ogm.model.key.spi.AssociationKey;
import org.hibernate.ogm.model.key.spi.AssociationKeyMetadata;
import org.hibernate.ogm.model.key.spi.EntityKey;
import org.hibernate.ogm.model.key.spi.EntityKeyMetadata;
import org.hibernate.ogm.model.key.spi.IdSourceKey;
import org.hibernate.ogm.model.key.spi.RowKey;
import org.hibernate.ogm.model.spi.Association;
import org.hibernate.ogm.model.spi.Tuple;
import org.hibernate.persister.entity.Lockable;
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 extends BaseGridDialect {
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_CACHE );
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, TupleContext tupleContext) {
//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_CACHE );
FineGrainedAtomicMap<String,Object> atomicMap = AtomicMapLookup.getFineGrainedAtomicMap( cache, key, true );
return new Tuple( new InfinispanTupleSnapshot( atomicMap ) );
}
@Override
public void insertOrUpdateTuple(EntityKey key, Tuple tuple, TupleContext tupleContext) {
Map<String,Object> atomicMap = ( (InfinispanTupleSnapshot) tuple.getSnapshot() ).getAtomicMap();
MapHelpers.applyTupleOpsOnMap( tuple, atomicMap );
}
@Override
public void removeTuple(EntityKey key, TupleContext tupleContext) {
Cache<EntityKey, Map<String, Object>> cache = provider.getCache( ENTITY_CACHE );
AtomicMapLookup.removeAtomicMap( cache, key );
}
@Override
public Association getAssociation(AssociationKey key, AssociationContext associationContext) {
Cache<AssociationKey, Map<RowKey, Map<String, Object>>> cache = provider.getCache( ASSOCIATION_CACHE );
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, AssociationContext associationContext) {
//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_CACHE );
Map<RowKey, Map<String, Object>> atomicMap = AtomicMapLookup.getFineGrainedAtomicMap( cache, key, true );
return new Association( new MapAssociationSnapshot( atomicMap ) );
}
@Override
public void insertOrUpdateAssociation(AssociationKey key, Association association, AssociationContext associationContext) {
MapHelpers.updateAssociation( association, key );
}
@Override
public void removeAssociation(AssociationKey key, AssociationContext associationContext) {
Cache<AssociationKey, Map<RowKey, Map<String, Object>>> cache = provider.getCache( ASSOCIATION_CACHE );
AtomicMapLookup.removeAtomicMap( cache, key );
}
@Override
public boolean isStoredInEntityStructure(AssociationKeyMetadata associationKeyMetadata, AssociationTypeContext associationTypeContext) {
return false;
}
@Override
//TODO should we use GridTypes here?
public Number nextValue(NextValueRequest request) {
final AdvancedCache<IdSourceKey, Object> identifierCache = provider.getCache( IDENTIFIER_CACHE ).getAdvancedCache();
boolean done;
Number value;
do {
//skip locking proposed by Sanne
value = (Number) identifierCache.withFlags( Flag.SKIP_LOCKING ).get( request.getKey() );
if ( value == null ) {
value = Long.valueOf( request.getInitialValue() );
final Number oldValue = (Number) identifierCache.putIfAbsent( request.getKey(), value );
if ( oldValue != null ) {
value = oldValue;
}
}
Number newValue = value.longValue() + request.getIncrement();
done = identifierCache.replace( request.getKey(), value, newValue );
}
while ( !done );
return value;
}
@Override
@SuppressWarnings("unchecked")
public void forEachTuple(ModelConsumer consumer, EntityKeyMetadata... entityKeyMetadatas) {
Cache<EntityKey, Map<String, Object>> cache = provider.getCache( ENTITY_CACHE );
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();
}
}
}