package org.tests.query;
import io.ebean.BaseTestCase;
import io.ebean.Ebean;
import io.ebean.EbeanServer;
import io.ebean.Query;
import io.ebean.QueryIterator;
import org.tests.model.basic.Customer;
import org.tests.model.basic.Order;
import org.tests.model.basic.OrderShipment;
import org.tests.model.basic.ResetBasicData;
import org.ebeantest.LoggedSqlCollector;
import org.junit.Test;
import javax.persistence.PersistenceException;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class TestQueryFindIterate extends BaseTestCase {
@Test
public void test() {
ResetBasicData.reset();
EbeanServer server = Ebean.getServer(null);
Query<Customer> query = server.find(Customer.class)
.setMaxRows(2);
final AtomicInteger count = new AtomicInteger();
try (QueryIterator<Customer> it = query.findIterate()) {
while (it.hasNext()) {
Customer customer = it.next();
customer.getName();
count.incrementAndGet();
}
}
assertEquals(2, count.get());
}
@Test
public void test_hasNext_hasNext() {
ResetBasicData.reset();
EbeanServer server = Ebean.getServer(null);
QueryIterator<Customer> queryIterator = server.find(Customer.class)
.where()
.isNotNull("name")
.setMaxRows(3)
.order().asc("id")
.findIterate();
try {
// check that hasNext does not move to the next bean
assertTrue(queryIterator.hasNext());
assertTrue(queryIterator.hasNext());
assertTrue(queryIterator.hasNext());
assertTrue(queryIterator.hasNext());
assertTrue(queryIterator.hasNext());
Customer first = queryIterator.next();
logger.info("first: {}", queryIterator.next());
assertEquals(first.getId(), Integer.valueOf(1));
while (queryIterator.hasNext()) {
logger.info("next: {}", queryIterator.next());
}
} finally {
queryIterator.close();
}
}
@Test
public void findEach() {
ResetBasicData.reset();
EbeanServer server = Ebean.getServer(null);
Query<Customer> query = server.find(Customer.class)
.setAutoTune(false)
//.fetch("contacts", new FetchConfig().query(2)).where().gt("id", 0).orderBy("id")
.setMaxRows(2);
final AtomicInteger count = new AtomicInteger();
query.findEach(bean -> count.incrementAndGet());
assertEquals(2, count.get());
}
@Test
public void testWithLazyLoading() {
ResetBasicData.reset();
Ebean.find(Order.class)
//.select("orderDate")
.where().gt("id", 0).le("id", 10)
.findEach(order -> {
Customer customer = order.getCustomer();
// invoke lazy loading on customer, order details and order shipments
order.getId();
customer.getName();
order.getDetails().size();
order.getShipments().size();
});
}
@Test
public void testWithLazyBatchSize() {
ResetBasicData.reset();
LoggedSqlCollector.start();
Ebean.find(Order.class)
.setLazyLoadBatchSize(10)
.select("status, orderDate")
.fetch("customer", "name")
.where().gt("id", 0).le("id", 10)
.setUseCache(false)
.findEach(order -> {
Customer customer = order.getCustomer();
customer.getName();
order.getDetails().size();
order.getShipments().size();
});
List<String> loggedSql = LoggedSqlCollector.stop();
assertEquals(3, loggedSql.size());
assertTrue(trimSql(loggedSql.get(0), 7).contains("select t0.id, t0.status, t0.order_date, t1.id, t1.name from o_order t0 join o_customer t1"));
assertTrue(trimSql(loggedSql.get(1), 7).contains("select t0.order_id, t0.id, t0.order_qty, t0.ship_qty, t0.unit_price"));
assertTrue(trimSql(loggedSql.get(2), 7).contains("select t0.order_id, t0.id, t0.ship_time, t0.cretime, t0.updtime, t0.version, t0.order_id from or_order_ship"));
}
@Test
public void testWithTwoJoins() {
ResetBasicData.reset();
LoggedSqlCollector.start();
// make sure we don't hit the L2 cache for order shipments
Ebean.getServerCacheManager().clear(Order.class);
Ebean.getServerCacheManager().clear(OrderShipment.class);
Ebean.find(Order.class)
.setLazyLoadBatchSize(10)
.setUseCache(false)
.select("status, orderDate")
.fetch("customer", "name")
.fetch("details")
.where().gt("id", 0).le("id", 10)
.order().asc("id")
.findEach(order -> {
Customer customer = order.getCustomer();
order.getId();
customer.getName();
order.getDetails().size();
order.getShipments().size();
});
List<String> loggedSql = LoggedSqlCollector.stop();
assertEquals("Got SQL: " + loggedSql, 2, loggedSql.size());
assertThat(trimSql(loggedSql.get(0), 7).contains("select t0.id, t0.status, t0.order_date, t1.id, t1.name, t2.id, t2.order_qty, t2.ship_qty"));
assertThat(trimSql(loggedSql.get(1), 7).contains("select t0.order_id, t0.id, t0.ship_time, t0.cretime, t0.updtime, t0.version, t0.order_id from or_order_ship"));
}
@Test(expected = PersistenceException.class)
public void testWithExceptionInQuery() {
ResetBasicData.reset();
EbeanServer server = Ebean.getServer(null);
// intentionally a query with incorrect type binding
Query<Customer> query = server.find(Customer.class)
.setAutoTune(false)
.where().gt("id", "JUNK_NOT_A_LONG")
.setMaxRows(2);
// this throws an exception immediately
query.findEach(bean -> {
});
if (!server.getName().equals("h2")) {
// MySql allows the query with type conversion?
throw new PersistenceException("H2 does expected thing but MySql does not");
}
assertTrue("Never get here as exception thrown", false);
}
@Test(expected = IllegalStateException.class)
public void testWithExceptionInLoop() {
ResetBasicData.reset();
EbeanServer server = Ebean.getServer(null);
Query<Customer> query = server.find(Customer.class)
.setAutoTune(false)
.where().gt("id", 0)
.setMaxRows(2);
query.findEach(customer -> {
if (customer != null) {
throw new IllegalStateException("cause an exception");
}
});
}
}