public void test() {
TSMaster m0 = new TSMaster();
m0.setName("m1");
m0.addDetail(new TSDetail("m1 detail 1"));
m0.addDetail(new TSDetail("m1 detail 2"));
Ebean.save(m0);
TSMaster master = Ebean.find(TSMaster.class, m0.getId());
List<TSDetail> details = master.getDetails();
TSDetail removedDetail = details.remove(1);
BeanCollection<?> bc = (BeanCollection<?>) details;
Set<?> modifyRemovals = bc.getModifyRemovals();
Assert.assertNotNull(modifyRemovals);
Assert.assertTrue(modifyRemovals.size() == 1);
Assert.assertTrue(modifyRemovals.contains(removedDetail));
Ebean.save(master);
TSMaster masterReload = Ebean.find(TSMaster.class, m0.getId());
List<TSDetail> detailsReload = masterReload.getDetails();
// the removed bean has really been removed
Assert.assertTrue(detailsReload.size() == 1);
TSMaster master3 = Ebean.find(TSMaster.class, m0.getId());
List<TSDetail> details3 = master3.getDetails();
details3.clear();
}
/** Find a list/map/set of beans. */
public <T> BeanCollection<T> findMany(OrmQueryRequest<T> request) {
// flag indicating whether we need to close the resources...
boolean useBackgroundToContinueFetch = false;
CQuery<T> cquery = queryBuilder.buildQuery(request);
request.setCancelableQuery(cquery);
try {
if (!cquery.prepareBindExecuteQuery()) {
// query has been cancelled already
logger.trace("Future fetch already cancelled");
return null;
}
if (request.isLogSql()) {
logSql(cquery);
}
BeanCollection<T> beanCollection = cquery.readCollection();
BeanCollectionTouched collectionTouched = request.getQuery().getBeanCollectionTouched();
if (collectionTouched != null) {
// register a listener that wants to be notified when the
// bean collection is first used
beanCollection.setBeanCollectionTouched(collectionTouched);
}
if (cquery.useBackgroundToContinueFetch()) {
// stop the request from putting connection back into pool
// before background fetching is finished.
request.setBackgroundFetching();
useBackgroundToContinueFetch = true;
BackgroundFetch fetch = new BackgroundFetch(cquery);
FutureTask<Integer> future = new FutureTask<Integer>(fetch);
beanCollection.setBackgroundFetch(future);
backgroundExecutor.execute(future);
}
if (request.isLogSummary()) {
logFindManySummary(cquery);
}
request.executeSecondaryQueries(defaultSecondaryQueryBatchSize);
return beanCollection;
} catch (SQLException e) {
throw cquery.createPersistenceException(e);
} finally {
if (useBackgroundToContinueFetch) {
// left closing resources to BackgroundFetch...
} else {
if (cquery != null) {
cquery.close();
}
if (request.getQuery().isFutureFetch()) {
// end the transaction for futureFindIds
// as it had it's own transaction
logger.debug("Future fetch completed!");
request.getTransaction().end();
}
}
}
}
