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LuceneBackendFactory.java
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LuceneBackendFactory.java
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/*
* Hibernate Search, full-text search for your domain model
*
* 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.search.backend.lucene.impl;
import java.lang.invoke.MethodHandles;
import java.text.ParseException;
import java.util.Locale;
import java.util.Optional;
import org.hibernate.search.backend.lucene.analysis.LuceneAnalysisConfigurer;
import org.hibernate.search.backend.lucene.analysis.impl.LuceneAnalysisComponentFactory;
import org.hibernate.search.backend.lucene.analysis.model.dsl.impl.LuceneAnalysisConfigurationContextImpl;
import org.hibernate.search.backend.lucene.analysis.model.impl.LuceneAnalysisDefinitionRegistry;
import org.hibernate.search.backend.lucene.multitenancy.MultiTenancyStrategyName;
import org.hibernate.search.backend.lucene.cfg.LuceneBackendSettings;
import org.hibernate.search.backend.lucene.lowlevel.directory.impl.DirectoryProviderInitializationContextImpl;
import org.hibernate.search.backend.lucene.lowlevel.directory.spi.DirectoryProvider;
import org.hibernate.search.backend.lucene.logging.impl.Log;
import org.hibernate.search.backend.lucene.multitenancy.impl.DiscriminatorMultiTenancyStrategy;
import org.hibernate.search.backend.lucene.multitenancy.impl.MultiTenancyStrategy;
import org.hibernate.search.backend.lucene.multitenancy.impl.NoMultiTenancyStrategy;
import org.hibernate.search.backend.lucene.resources.impl.BackendThreads;
import org.hibernate.search.backend.lucene.search.timeout.impl.DefaultTimingSource;
import org.hibernate.search.backend.lucene.work.impl.LuceneWorkFactoryImpl;
import org.hibernate.search.engine.backend.spi.BackendImplementor;
import org.hibernate.search.engine.backend.spi.BackendFactory;
import org.hibernate.search.engine.cfg.spi.ConfigurationPropertySource;
import org.hibernate.search.engine.cfg.spi.ConfigurationProperty;
import org.hibernate.search.engine.backend.spi.BackendBuildContext;
import org.hibernate.search.engine.cfg.spi.OptionalConfigurationProperty;
import org.hibernate.search.engine.environment.bean.BeanHolder;
import org.hibernate.search.engine.environment.bean.BeanResolver;
import org.hibernate.search.engine.environment.bean.BeanReference;
import org.hibernate.search.util.common.impl.SuppressingCloser;
import org.hibernate.search.util.common.reporting.EventContext;
import org.hibernate.search.engine.reporting.spi.EventContexts;
import org.hibernate.search.util.common.AssertionFailure;
import org.hibernate.search.util.common.logging.impl.LoggerFactory;
import org.apache.lucene.util.Version;
public class LuceneBackendFactory implements BackendFactory {
private static final Log log = LoggerFactory.make( Log.class, MethodHandles.lookup() );
private static final ConfigurationProperty<Optional<Version>> LUCENE_VERSION =
ConfigurationProperty.forKey( LuceneBackendSettings.LUCENE_VERSION )
.as( Version.class, LuceneBackendFactory::parseLuceneVersion )
.build();
private static final ConfigurationProperty<MultiTenancyStrategyName> MULTI_TENANCY_STRATEGY =
ConfigurationProperty.forKey( LuceneBackendSettings.MULTI_TENANCY_STRATEGY )
.as( MultiTenancyStrategyName.class, MultiTenancyStrategyName::of )
.withDefault( LuceneBackendSettings.Defaults.MULTI_TENANCY_STRATEGY )
.build();
private static final OptionalConfigurationProperty<BeanReference<? extends LuceneAnalysisConfigurer>> ANALYSIS_CONFIGURER =
ConfigurationProperty.forKey( LuceneBackendSettings.ANALYSIS_CONFIGURER )
.asBeanReference( LuceneAnalysisConfigurer.class )
.build();
@Override
public BackendImplementor create(String name, BackendBuildContext buildContext,
ConfigurationPropertySource propertySource) {
EventContext backendContext = EventContexts.fromBackendName( name );
BackendThreads backendThreads = null;
BeanHolder<? extends DirectoryProvider> directoryProviderHolder = null;
try {
backendThreads = new BackendThreads( "Backend " + name );
Version luceneVersion = getLuceneVersion( backendContext, propertySource );
directoryProviderHolder = getDirectoryProvider( backendContext, buildContext, propertySource );
MultiTenancyStrategy multiTenancyStrategy = getMultiTenancyStrategy( propertySource );
LuceneAnalysisDefinitionRegistry analysisDefinitionRegistry = getAnalysisDefinitionRegistry(
buildContext, propertySource, luceneVersion
);
return new LuceneBackendImpl(
name,
backendThreads,
directoryProviderHolder,
new LuceneWorkFactoryImpl( multiTenancyStrategy ),
analysisDefinitionRegistry,
multiTenancyStrategy,
new DefaultTimingSource(),
buildContext.getFailureHandler()
);
}
catch (RuntimeException e) {
new SuppressingCloser( e )
.push( holder -> holder.get().close(), directoryProviderHolder )
.push( BeanHolder::close, directoryProviderHolder )
.push( BackendThreads::onStop, backendThreads );
throw e;
}
}
private Version getLuceneVersion(EventContext backendContext, ConfigurationPropertySource propertySource) {
Version luceneVersion;
Optional<Version> luceneVersionOptional = LUCENE_VERSION.get( propertySource );
if ( luceneVersionOptional.isPresent() ) {
luceneVersion = luceneVersionOptional.get();
if ( log.isDebugEnabled() ) {
log.debug( "Setting Lucene compatibility to Version " + luceneVersion );
}
}
else {
Version latestVersion = LuceneBackendSettings.Defaults.LUCENE_VERSION;
log.recommendConfiguringLuceneVersion(
LUCENE_VERSION.resolveOrRaw( propertySource ),
latestVersion,
backendContext
);
luceneVersion = latestVersion;
}
return luceneVersion;
}
private BeanHolder<? extends DirectoryProvider> getDirectoryProvider(EventContext backendContext,
BackendBuildContext buildContext, ConfigurationPropertySource propertySource) {
DirectoryProviderInitializationContextImpl initializationContext = new DirectoryProviderInitializationContextImpl(
backendContext,
buildContext.getBeanResolver(),
propertySource.withMask( "directory" )
);
return initializationContext.createDirectoryProvider();
}
private MultiTenancyStrategy getMultiTenancyStrategy(ConfigurationPropertySource propertySource) {
MultiTenancyStrategyName multiTenancyStrategyName = MULTI_TENANCY_STRATEGY.get( propertySource );
switch ( multiTenancyStrategyName ) {
case NONE:
return new NoMultiTenancyStrategy();
case DISCRIMINATOR:
return new DiscriminatorMultiTenancyStrategy();
default:
throw new AssertionFailure( String.format(
Locale.ROOT, "Unsupported multi-tenancy strategy '%1$s'.",
multiTenancyStrategyName
) );
}
}
private LuceneAnalysisDefinitionRegistry getAnalysisDefinitionRegistry(
BackendBuildContext buildContext, ConfigurationPropertySource propertySource,
Version luceneVersion) {
try {
// Apply the user-provided analysis configurer if necessary
final BeanResolver beanResolver = buildContext.getBeanResolver();
return ANALYSIS_CONFIGURER.getAndMap( propertySource, beanResolver::resolve )
.map( holder -> {
try ( BeanHolder<? extends LuceneAnalysisConfigurer> configurerHolder = holder ) {
LuceneAnalysisComponentFactory analysisComponentFactory = new LuceneAnalysisComponentFactory(
luceneVersion,
buildContext.getClassResolver(),
buildContext.getResourceResolver()
);
LuceneAnalysisConfigurationContextImpl collector =
new LuceneAnalysisConfigurationContextImpl( analysisComponentFactory );
configurerHolder.get().configure( collector );
return new LuceneAnalysisDefinitionRegistry( collector );
}
} )
// Otherwise just use an empty registry
.orElseGet( LuceneAnalysisDefinitionRegistry::new );
}
catch (Exception e) {
throw log.unableToApplyAnalysisConfiguration( e.getMessage(), e );
}
}
private static Version parseLuceneVersion(String versionString) {
try {
return Version.parseLeniently( versionString );
}
catch (IllegalArgumentException | ParseException e) {
throw log.illegalLuceneVersionFormat( versionString, e.getMessage(), e );
}
}
}