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LuceneBackendImpl.java
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LuceneBackendImpl.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.util.concurrent.CompletableFuture;
import org.hibernate.search.backend.lucene.analysis.model.impl.LuceneAnalysisDefinitionRegistry;
import org.hibernate.search.backend.lucene.document.model.dsl.impl.LuceneIndexSchemaRootNodeBuilder;
import org.hibernate.search.backend.lucene.lowlevel.directory.spi.DirectoryProvider;
import org.hibernate.search.backend.lucene.resources.impl.BackendThreads;
import org.hibernate.search.backend.lucene.search.timeout.spi.TimingSource;
import org.hibernate.search.engine.backend.Backend;
import org.hibernate.search.engine.backend.index.spi.IndexManagerBuilder;
import org.hibernate.search.backend.lucene.LuceneBackend;
import org.hibernate.search.backend.lucene.index.impl.IndexManagerBackendContext;
import org.hibernate.search.backend.lucene.index.impl.LuceneIndexManagerBuilder;
import org.hibernate.search.backend.lucene.logging.impl.Log;
import org.hibernate.search.backend.lucene.multitenancy.impl.MultiTenancyStrategy;
import org.hibernate.search.backend.lucene.orchestration.impl.LuceneSyncWorkOrchestratorImpl;
import org.hibernate.search.backend.lucene.work.impl.LuceneWorkFactory;
import org.hibernate.search.engine.backend.spi.BackendImplementor;
import org.hibernate.search.engine.backend.spi.BackendStartContext;
import org.hibernate.search.engine.cfg.spi.ConfigurationPropertySource;
import org.hibernate.search.engine.backend.spi.BackendBuildContext;
import org.hibernate.search.engine.environment.bean.BeanHolder;
import org.hibernate.search.engine.reporting.FailureHandler;
import org.hibernate.search.util.common.reporting.EventContext;
import org.hibernate.search.engine.reporting.spi.EventContexts;
import org.hibernate.search.util.common.impl.Closer;
import org.hibernate.search.util.common.logging.impl.LoggerFactory;
import org.apache.lucene.search.similarities.Similarity;
public class LuceneBackendImpl implements BackendImplementor, LuceneBackend {
private static final Log log = LoggerFactory.make( Log.class, MethodHandles.lookup() );
private final String name;
private final BackendThreads threads;
private final BeanHolder<? extends DirectoryProvider> directoryProviderHolder;
private final LuceneAnalysisDefinitionRegistry analysisDefinitionRegistry;
private final LuceneSyncWorkOrchestratorImpl readOrchestrator;
private final MultiTenancyStrategy multiTenancyStrategy;
private final TimingSource timingSource;
private final EventContext eventContext;
private final IndexManagerBackendContext indexManagerBackendContext;
LuceneBackendImpl(String name,
BackendThreads threads,
BeanHolder<? extends DirectoryProvider> directoryProviderHolder,
LuceneWorkFactory workFactory,
LuceneAnalysisDefinitionRegistry analysisDefinitionRegistry,
MultiTenancyStrategy multiTenancyStrategy,
TimingSource timingSource,
FailureHandler failureHandler) {
this.name = name;
this.threads = threads;
this.directoryProviderHolder = directoryProviderHolder;
this.analysisDefinitionRegistry = analysisDefinitionRegistry;
Similarity similarity = analysisDefinitionRegistry.getSimilarity();
this.readOrchestrator = new LuceneSyncWorkOrchestratorImpl(
"Lucene read work orchestrator for backend " + name, similarity
);
this.multiTenancyStrategy = multiTenancyStrategy;
this.timingSource = timingSource;
this.eventContext = EventContexts.fromBackendName( name );
this.indexManagerBackendContext = new IndexManagerBackendContext(
eventContext, threads, directoryProviderHolder.get(), similarity,
workFactory, multiTenancyStrategy,
timingSource, analysisDefinitionRegistry,
failureHandler,
readOrchestrator
);
}
@Override
public String toString() {
return new StringBuilder( getClass().getSimpleName() )
.append( "[" )
.append( "name=" ).append( name ).append( ", " )
.append( "directoryProvider=" ).append( directoryProviderHolder.get() )
.append( "]" )
.toString();
}
@Override
public void start(BackendStartContext context) {
threads.onStart( context.getConfigurationPropertySource(), context.getThreadPoolProvider() );
}
@Override
public CompletableFuture<?> preStop() {
// Nothing to do
return CompletableFuture.completedFuture( null );
}
@Override
public void stop() {
try ( Closer<RuntimeException> closer = new Closer<>() ) {
closer.push( LuceneSyncWorkOrchestratorImpl::stop, readOrchestrator );
closer.push( holder -> holder.get().close(), directoryProviderHolder );
closer.push( BeanHolder::close, directoryProviderHolder );
closer.push( TimingSource::stop, timingSource );
closer.push( BackendThreads::onStop, threads );
}
}
@Override
@SuppressWarnings("unchecked") // Checked using reflection
public <T> T unwrap(Class<T> clazz) {
if ( clazz.isAssignableFrom( LuceneBackend.class ) ) {
return (T) this;
}
throw log.backendUnwrappingWithUnknownType(
clazz, LuceneBackend.class, eventContext
);
}
@Override
public Backend toAPI() {
return this;
}
@Override
public IndexManagerBuilder createIndexManagerBuilder(
String indexName, String mappedTypeName,
boolean multiTenancyEnabled,
BackendBuildContext context, ConfigurationPropertySource propertySource) {
if ( multiTenancyEnabled && !multiTenancyStrategy.isMultiTenancySupported() ) {
throw log.multiTenancyRequiredButNotSupportedByBackend( indexName, eventContext );
}
LuceneIndexSchemaRootNodeBuilder indexSchemaRootNodeBuilder = new LuceneIndexSchemaRootNodeBuilder(
EventContexts.fromIndexName( indexName ), mappedTypeName, analysisDefinitionRegistry
);
/*
* We do not normalize index names: directory providers are expected to use the exact given index name,
* or a reversible conversion of that name, as an internal key (file names, ...),
* and therefore the internal key should stay unique.
*/
return new LuceneIndexManagerBuilder(
indexManagerBackendContext,
indexName, indexSchemaRootNodeBuilder
);
}
}