How to give ttl in Cassandra when inserting data in batches? - spring-boot

Question

Hello I am using Cassandra to save user data . I want to store data of a user for only 24 hours so I am giving a ttl for 24 hours. For each user there are multiple entries. So I want to batch insert data for each user instead of multiple calls to data base . I am using Cassandra operations to give ttl . I am able to give ttl for single record . How to provide ttl when inserting data in batches
public class CustomizedUserFeedRepositoryImpl<T> implements CustomizedUserFeedRepository<T> {
private CassandraOperations cassandraOperations;
#Autowired
CustomizedUserFeedRepositoryImpl(CassandraOperations cassandraOperations){
this.cassandraOperations = cassandraOperations;
}
#Override
public <S extends T> S save(S entity, int ttl){
InsertOptions insertOptions;
if(ttl == 0) {
insertOptions = InsertOptions.builder().ttl(Duration.ofHours(24)).build();
} else {
insertOptions = InsertOptions.builder().ttl(ttl).build();
}
cassandraOperations.insert(entity,insertOptions);
return entity;
}
#Override
public void saveAllWithTtl(java.lang.Iterable<T> entities, int ttl){
entities.forEach(entity->{
save(entity,ttl);
});
}
}
As you can see I have to iterate over the list make and make database calls for each record . The batch operation cassandraOperations.batchOps().insert() only takes list of objects . How to set ttl for each record when using batchops() fucntion ?

Answer 1

/**
* Add a collection of inserts with given {#link WriteOptions} to the batch.
*
* #param entities the entities to insert; must not be {#literal null}.
* #param options the WriteOptions to apply; must not be {#literal null}.
* #return {#code this} {#link CassandraBatchOperations}.
* #throws IllegalStateException if the batch was already executed.
* #since 2.0
*/
CassandraBatchOperations insert(Iterable<?> entities, WriteOptions options);
You can use insert(Iterable<?> entities, WriteOptions options) method
#EqualsAndHashCode(callSuper = true)
public class WriteOptions extends QueryOptions {
private static final WriteOptions EMPTY = new WriteOptionsBuilder().build();
private final Duration ttl;
private final #Nullable Long timestamp;
batchOperations.insert(entity, WriteOptions.builder().ttl(20).build());