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Cassandra support for Spring Data
/*
* Copyright 2016-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.data.cassandra.repository.support;
import java.lang.reflect.Method;
import java.util.Optional;
import org.springframework.data.cassandra.core.ReactiveCassandraOperations;
import org.springframework.data.cassandra.core.mapping.CassandraPersistentEntity;
import org.springframework.data.cassandra.core.mapping.CassandraPersistentProperty;
import org.springframework.data.cassandra.repository.query.CassandraEntityInformation;
import org.springframework.data.cassandra.repository.query.ReactiveCassandraQueryMethod;
import org.springframework.data.cassandra.repository.query.ReactivePartTreeCassandraQuery;
import org.springframework.data.cassandra.repository.query.ReactiveStringBasedCassandraQuery;
import org.springframework.data.mapping.context.MappingContext;
import org.springframework.data.projection.ProjectionFactory;
import org.springframework.data.repository.core.NamedQueries;
import org.springframework.data.repository.core.RepositoryInformation;
import org.springframework.data.repository.core.RepositoryMetadata;
import org.springframework.data.repository.core.support.ReactiveRepositoryFactorySupport;
import org.springframework.data.repository.query.QueryLookupStrategy;
import org.springframework.data.repository.query.QueryLookupStrategy.Key;
import org.springframework.data.repository.query.QueryMethodEvaluationContextProvider;
import org.springframework.data.repository.query.RepositoryQuery;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Factory to create {@link org.springframework.data.cassandra.repository.ReactiveCassandraRepository} instances.
*
* @author Mark Paluch
* @since 2.0
*/
public class ReactiveCassandraRepositoryFactory extends ReactiveRepositoryFactorySupport {
private static final SpelExpressionParser EXPRESSION_PARSER = new SpelExpressionParser();
private final ReactiveCassandraOperations operations;
private final MappingContext, ? extends CassandraPersistentProperty> mappingContext;
/**
* Create a new {@link ReactiveCassandraRepositoryFactory} with the given {@link ReactiveCassandraOperations}.
*
* @param cassandraOperations must not be {@literal null}.
*/
public ReactiveCassandraRepositoryFactory(ReactiveCassandraOperations cassandraOperations) {
Assert.notNull(cassandraOperations, "ReactiveCassandraOperations must not be null");
this.operations = cassandraOperations;
this.mappingContext = cassandraOperations.getConverter().getMappingContext();
}
/* (non-Javadoc)
* @see org.springframework.data.repository.core.support.RepositoryFactorySupport#getRepositoryBaseClass(org.springframework.data.repository.core.RepositoryMetadata)
*/
@Override
protected Class getRepositoryBaseClass(RepositoryMetadata metadata) {
return SimpleReactiveCassandraRepository.class;
}
/* (non-Javadoc)
* @see org.springframework.data.repository.core.support.RepositoryFactorySupport#getTargetRepository(org.springframework.data.repository.core.RepositoryInformation)
*/
@Override
protected Object getTargetRepository(RepositoryInformation information) {
CassandraEntityInformation entityInformation = getEntityInformation(information.getDomainType());
return getTargetRepositoryViaReflection(information, entityInformation, operations);
}
/* (non-Javadoc)
* @see org.springframework.data.repository.core.support.RepositoryFactorySupport#getQueryLookupStrategy(org.springframework.data.repository.query.QueryLookupStrategy.Key, org.springframework.data.repository.query.EvaluationContextProvider)
*/
@Override
protected Optional getQueryLookupStrategy(@Nullable Key key,
QueryMethodEvaluationContextProvider evaluationContextProvider) {
return Optional.of(new CassandraQueryLookupStrategy(operations, evaluationContextProvider, mappingContext));
}
/* (non-Javadoc)
* @see org.springframework.data.repository.core.support.RepositoryFactorySupport#getEntityInformation(java.lang.Class)
*/
@SuppressWarnings("unchecked")
public CassandraEntityInformation getEntityInformation(Class domainClass) {
CassandraPersistentEntity entity = mappingContext.getRequiredPersistentEntity(domainClass);
return new MappingCassandraEntityInformation<>((CassandraPersistentEntity) entity, operations.getConverter());
}
/**
* {@link QueryLookupStrategy} to create
* {@link org.springframework.data.cassandra.repository.query.PartTreeCassandraQuery} instances.
*
* @author Mark Paluch
*/
private static class CassandraQueryLookupStrategy implements QueryLookupStrategy {
private final QueryMethodEvaluationContextProvider evaluationContextProvider;
private final ReactiveCassandraOperations operations;
private final MappingContext, ? extends CassandraPersistentProperty> mappingContext;
CassandraQueryLookupStrategy(ReactiveCassandraOperations operations,
QueryMethodEvaluationContextProvider evaluationContextProvider,
MappingContext, ? extends CassandraPersistentProperty> mappingContext) {
this.evaluationContextProvider = evaluationContextProvider;
this.operations = operations;
this.mappingContext = mappingContext;
}
/* (non-Javadoc)
* @see org.springframework.data.repository.query.QueryLookupStrategy#resolveQuery(java.lang.reflect.Method, org.springframework.data.repository.core.RepositoryMetadata, org.springframework.data.projection.ProjectionFactory, org.springframework.data.repository.core.NamedQueries)
*/
@Override
public RepositoryQuery resolveQuery(Method method, RepositoryMetadata metadata, ProjectionFactory factory,
NamedQueries namedQueries) {
ReactiveCassandraQueryMethod queryMethod = new ReactiveCassandraQueryMethod(method, metadata, factory,
mappingContext);
String namedQueryName = queryMethod.getNamedQueryName();
if (namedQueries.hasQuery(namedQueryName)) {
String namedQuery = namedQueries.getQuery(namedQueryName);
return new ReactiveStringBasedCassandraQuery(namedQuery, queryMethod, operations, EXPRESSION_PARSER,
evaluationContextProvider);
} else if (queryMethod.hasAnnotatedQuery()) {
return new ReactiveStringBasedCassandraQuery(queryMethod, operations, EXPRESSION_PARSER,
evaluationContextProvider);
} else {
return new ReactivePartTreeCassandraQuery(queryMethod, operations);
}
}
}
}