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Cassandra support for Spring Data
/*
* Copyright 2016-2018 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
*
* http://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.Arrays;
import java.util.concurrent.atomic.AtomicBoolean;
import org.springframework.data.cassandra.core.cql.QueryOptions;
import org.springframework.data.cassandra.core.cql.WriteOptions;
import org.springframework.data.cassandra.core.mapping.BasicCassandraPersistentEntity;
import org.springframework.data.cassandra.core.mapping.CassandraMappingContext;
import org.springframework.util.Assert;
import com.datastax.driver.core.querybuilder.Batch;
import com.datastax.driver.core.querybuilder.QueryBuilder;
/**
* Default implementation for {@link CassandraBatchOperations}.
*
* @author Mark Paluch
* @author John Blum
* @author Anup Sabbi
* @since 1.5
*/
class CassandraBatchTemplate implements CassandraBatchOperations {
private final CassandraOperations operations;
private final AtomicBoolean executed = new AtomicBoolean();
private final Batch batch = QueryBuilder.batch();
/**
* Create a new {@link CassandraBatchTemplate} given {@link CassandraOperations}.
*
* @param operations must not be {@literal null}.
*/
CassandraBatchTemplate(CassandraOperations operations) {
Assert.notNull(operations, "CassandraOperations must not be null");
this.operations = operations;
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraBatchOperations#execute()
*/
@Override
public WriteResult execute() {
if (executed.compareAndSet(false, true)) {
return WriteResult.of(operations.getCqlOperations().queryForResultSet(batch));
}
throw new IllegalStateException("This Cassandra Batch was already executed");
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraBatchOperations#withTimestamp(long)
*/
@Override
public CassandraBatchOperations withTimestamp(long timestamp) {
assertNotExecuted();
batch.using(QueryBuilder.timestamp(timestamp));
return this;
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraBatchOperations#insert(java.lang.Object[])
*/
@Override
public CassandraBatchOperations insert(Object... entities) {
Assert.notNull(entities, "Entities must not be null");
return insert(Arrays.asList(entities));
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraBatchOperations#insert(java.lang.Iterable)
*/
@Override
public CassandraBatchOperations insert(Iterable entities) {
return insert(entities, InsertOptions.empty());
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraBatchOperations#insert(java.lang.Iterable, org.springframework.data.cassandra.core.cql.WriteOptions)
*/
@Override
public CassandraBatchOperations insert(Iterable entities, WriteOptions options) {
assertNotExecuted();
Assert.notNull(entities, "Entities must not be null");
Assert.notNull(options, "WriteOptions must not be null");
CassandraMappingContext mappingContext = operations.getConverter().getMappingContext();
for (Object entity : entities) {
Assert.notNull(entity, "Entity must not be null");
BasicCassandraPersistentEntity persistentEntity = mappingContext
.getRequiredPersistentEntity(entity.getClass());
batch.add(QueryUtils.createInsertQuery(persistentEntity.getTableName().toCql(), entity, options,
operations.getConverter(), persistentEntity));
}
return this;
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraBatchOperations#update(java.lang.Object[])
*/
@Override
public CassandraBatchOperations update(Object... entities) {
Assert.notNull(entities, "Entities must not be null");
return update(Arrays.asList(entities));
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraBatchOperations#update(java.lang.Iterable)
*/
@Override
public CassandraBatchOperations update(Iterable entities) {
return update(entities, UpdateOptions.empty());
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraBatchOperations#update(java.lang.Iterable, org.springframework.data.cassandra.core.cql.WriteOptions)
*/
@Override
public CassandraBatchOperations update(Iterable entities, WriteOptions options) {
assertNotExecuted();
Assert.notNull(entities, "Entities must not be null");
Assert.notNull(options, "WriteOptions must not be null");
for (Object entity : entities) {
Assert.notNull(entity, "Entity must not be null");
batch.add(QueryUtils.createUpdateQuery(getTableName(entity), entity, options, operations.getConverter()));
}
return this;
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraBatchOperations#delete(java.lang.Object[])
*/
@Override
public CassandraBatchOperations delete(Object... entities) {
Assert.notNull(entities, "Entities must not be null");
return delete(Arrays.asList(entities));
}
/* (non-Javadoc)
* @see org.springframework.data.cassandra.core.CassandraBatchOperations#delete(java.lang.Iterable)
*/
@Override
public CassandraBatchOperations delete(Iterable entities) {
assertNotExecuted();
Assert.notNull(entities, "Entities must not be null");
for (Object entity : entities) {
Assert.notNull(entity, "Entity must not be null");
batch.add(
QueryUtils.createDeleteQuery(getTableName(entity), entity, QueryOptions.empty(), operations.getConverter()));
}
return this;
}
private void assertNotExecuted() {
Assert.state(!executed.get(), "This Cassandra Batch was already executed");
}
private String getTableName(Object entity) {
Assert.notNull(entity, "Entity must not be null");
return operations.getTableName(entity.getClass()).toCql();
}
}