com.avaje.ebean
Interface QueryListener<T>

Type Parameters:

T - the type of entity bean

public interface QueryListener<T>

Provides a mechanism for processing a query one bean at a time.

This is useful when the query will return a large number of results and you want to process the beans one at a time rather than whole all of the beans in memory at once.

 QueryListener<Order> listener = ...;
    
 Query<Order> query  = Ebean.createQuery(Order.class);
    
 // set the listener that will process each order one at a time
 query.setListener(listener);
    
 // execute the query. Note that the returned
 // list will be empty ... so don't bother assigning it
 query.findList();
 

Method Summary

void	process(T bean) Process the bean that has just been read.

Method Detail

process

void process(T bean)

Process the bean that has just been read.

This bean will not be added to the List Set or Map and nor will it be put into the PersistenceContext. This is what makes this a good way to process a large result set (which could normally use a lot of memory).