Package org.springframework.data.cassandra.core

Class AsyncCassandraTemplate

java.lang.Object
org.springframework.data.cassandra.core.AsyncCassandraTemplate
All Implemented Interfaces:
Aware, ApplicationContextAware, ApplicationEventPublisherAware, AsyncCassandraOperations
public class AsyncCassandraTemplate extends Object implements AsyncCassandraOperations, ApplicationEventPublisherAware, ApplicationContextAware
Primary implementation of AsyncCassandraOperations. It simplifies the use of asynchronous Cassandra usage and helps to avoid common errors. It executes core Cassandra workflow. This class executes CQL queries or updates, initiating iteration over ResultSet and catching Cassandra exceptions and translating them to the generic, more informative exception hierarchy defined in the org.springframework.dao package.

Can be used within a service implementation via direct instantiation with a CqlSession reference, or get prepared in an application context and given to services as bean reference.

This class supports the use of prepared statements when enabling setUsePreparedStatements(boolean). All statements created by methods of this class (such as select(Query, Class) or update(Query, org.springframework.data.cassandra.core.query.Update, Class) will be executed as prepared statements. Also, statements accepted by methods (such as select(String, Class) or and others) will be prepared prior to execution. Note that Statement objects passed to methods must be SimpleStatement so that these can be prepared.

Note: The CqlSession should always be configured as a bean in the application context, in the first case given to the service directly, in the second case to the prepared template.

Since:
2.0
Author:
Mark Paluch, John Blum
See Also: