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Cassandra support for Spring Data
/*
* Copyright 2013-2019 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.core;
import java.util.Map;
import java.util.Optional;
import org.springframework.data.cassandra.SessionFactory;
import org.springframework.data.cassandra.core.convert.CassandraConverter;
import org.springframework.data.cassandra.core.cql.CqlIdentifier;
import org.springframework.data.cassandra.core.cql.SessionCallback;
import org.springframework.data.cassandra.core.cql.generator.CreateTableCqlGenerator;
import org.springframework.data.cassandra.core.cql.generator.DropTableCqlGenerator;
import org.springframework.data.cassandra.core.cql.generator.DropUserTypeCqlGenerator;
import org.springframework.data.cassandra.core.cql.keyspace.CreateTableSpecification;
import org.springframework.data.cassandra.core.cql.keyspace.DropTableSpecification;
import org.springframework.data.cassandra.core.cql.keyspace.DropUserTypeSpecification;
import org.springframework.data.cassandra.core.mapping.CassandraPersistentEntity;
import org.springframework.util.Assert;
import com.datastax.driver.core.KeyspaceMetadata;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.TableMetadata;
/**
* Default implementation of {@link CassandraAdminOperations}.
*
* @author Mark Paluch
* @author Fabio J. Mendes
* @author John Blum
* @author Vagif Zeynalov
*/
public class CassandraAdminTemplate extends CassandraTemplate implements CassandraAdminOperations {
protected static final boolean DEFAULT_DROP_TABLE_IF_EXISTS = false;
/**
* Constructor used for a basic template configuration.
*
* @param session must not be {@literal null}.
* @param converter must not be {@literal null}.
*/
public CassandraAdminTemplate(Session session, CassandraConverter converter) {
super(session, converter);
}
/**
* Constructor used for a basic template configuration.
*
* @param sessionFactory must not be {@literal null}.
* @param converter must not be {@literal null}.
*/
public CassandraAdminTemplate(SessionFactory sessionFactory, CassandraConverter converter) {
super(sessionFactory, converter);
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraAdminOperations#createTable(boolean, org.springframework.data.cassandra.core.cql.CqlIdentifier, java.lang.Class, java.util.Map)
*/
@Override
public void createTable(boolean ifNotExists, CqlIdentifier tableName, Class entityClass,
Map optionsByName) {
CassandraPersistentEntity entity = getConverter().getMappingContext().getRequiredPersistentEntity(entityClass);
CreateTableSpecification createTableSpecification = getConverter().getMappingContext()
.getCreateTableSpecificationFor(tableName, entity).ifNotExists(ifNotExists);
getCqlOperations().execute(CreateTableCqlGenerator.toCql(createTableSpecification));
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraAdminOperations#dropTable(java.lang.Class)
*/
@Override
public void dropTable(Class entityClass) {
dropTable(getTableName(entityClass));
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraAdminOperations#dropTable(org.springframework.data.cassandra.core.cql.CqlIdentifier)
*/
@Override
public void dropTable(CqlIdentifier tableName) {
dropTable(DEFAULT_DROP_TABLE_IF_EXISTS, tableName);
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraAdminOperations#dropTable(boolean, CqlIdentifier)
*/
@Override
public void dropTable(boolean ifExists, CqlIdentifier tableName) {
String dropTableCql = DropTableCqlGenerator.toCql(DropTableSpecification.dropTable(tableName).ifExists(ifExists));
getCqlOperations().execute(dropTableCql);
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraAdminOperations#dropUserType(org.springframework.data.cassandra.core.cql.CqlIdentifier)
*/
@Override
public void dropUserType(CqlIdentifier typeName) {
Assert.notNull(typeName, "Type name must not be null");
String dropUserTypeCql = DropUserTypeCqlGenerator.toCql(DropUserTypeSpecification.dropType(typeName));
getCqlOperations().execute(dropUserTypeCql);
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraAdminOperations#getTableMetadata(java.lang.String, org.springframework.data.cassandra.core.cql.CqlIdentifier)
*/
@Override
public Optional getTableMetadata(String keyspace, CqlIdentifier tableName) {
Assert.hasText(keyspace, "Keyspace name must not be empty");
Assert.notNull(tableName, "Table name must not be null");
return Optional.ofNullable(getCqlOperations().execute((SessionCallback) session -> session
.getCluster().getMetadata().getKeyspace(keyspace).getTable(tableName.toCql())));
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraAdminOperations#getKeyspaceMetadata()
*/
@Override
public KeyspaceMetadata getKeyspaceMetadata() {
// noinspection ConstantConditions
return getCqlOperations().execute((SessionCallback) session -> {
KeyspaceMetadata keyspaceMetadata = session.getCluster().getMetadata().getKeyspace(session.getLoggedKeyspace());
Assert.state(keyspaceMetadata != null,
String.format("Metadata for keyspace [%s] not available", session.getLoggedKeyspace()));
return keyspaceMetadata;
});
}
}