org.springframework.data.cassandra.core.cql.SimplePreparedStatementCreator Maven / Gradle / Ivy
Show all versions of spring-data-cassandra Show documentation
/*
* 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.cql;
import org.springframework.util.Assert;
import com.datastax.driver.core.PreparedStatement;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.exceptions.DriverException;
/**
* Trivial implementation of {@link PreparedStatementCreator}. This prepared statement creator simply prepares a
* statement from the CQL string.
*
* This implementation is useful for testing. It should not be used in production systems with high volume reads and
* writes. Use {@link CachedPreparedStatementCreator} When preparing statements with Cassandra, each Statement should be
* prepared once and only once due to the overhead of preparing the statement.
*
* @author David Webb
* @author Mark Paluch
*/
public class SimplePreparedStatementCreator implements PreparedStatementCreator, CqlProvider {
private final String cql;
/**
* Create a {@link SimplePreparedStatementCreator} given {@code cql}.
*
* @param cql must not be {@literal null}.
*/
public SimplePreparedStatementCreator(String cql) {
Assert.notNull(cql, "CQL is required to create a PreparedStatement");
this.cql = cql;
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.cqlProvider#getCql()
*/
public String getCql() {
return this.cql;
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.cql.PreparedStatementCreator#createPreparedStatement(com.datastax.driver.core.Session)
*/
@Override
public PreparedStatement createPreparedStatement(Session session) throws DriverException {
return session.prepare(this.cql);
}
}