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#2021 - Use smarter persistence context for findEach/iterate/stream queries - improve performance of un-tuned findEach/iterate/stream queries that invoke lazy loading

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This commit is contained in:
rob bygrave
2020-06-17 21:50:11 +12:00
parent 0e33d58bb2
commit 9b70900267
7 changed files with 307 additions and 36 deletions
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src/test/java/io/ebeaninternal/server/transaction/DefaultPersistenceContextTest.java
+114 -20
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@@ -2,12 +2,16 @@ package io.ebeaninternal.server.transaction;
import io.ebean.bean.PersistenceContext;
import io.ebeaninternal.server.deploy.PersistenceContextUtil;
import org.tests.model.basic.Car;
import org.tests.model.basic.Customer;
import org.tests.model.basic.Vehicle;
import org.junit.Test;
import org.tests.model.basic.Car;
import org.tests.model.basic.Contact;
import org.tests.model.basic.Customer;
import org.tests.model.basic.Product;
import org.tests.model.basic.Vehicle;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
public class DefaultPersistenceContextTest {
@@ -23,12 +27,12 @@ public class DefaultPersistenceContextTest {
car1.setId(1);
}
PersistenceContext pc() {
private DefaultPersistenceContext pc() {
return new DefaultPersistenceContext();
}
PersistenceContext pcWith42() {
PersistenceContext pc = pc();
private DefaultPersistenceContext pcWith42() {
DefaultPersistenceContext pc = pc();
pc.put(Customer.class, 42, customer42);
return pc;
}
@@ -38,7 +42,7 @@ public class DefaultPersistenceContextTest {
}
@Test
public void put_get_withInheritance() throws Exception {
public void put_get_withInheritance() {
PersistenceContext pc = pc();
pc.put(root(Vehicle.class), 1, car1);
@@ -48,7 +52,7 @@ public class DefaultPersistenceContextTest {
}
@Test
public void put_get() throws Exception {
public void put_get() {
PersistenceContext pc = pc();
pc.put(Customer.class, customer42.getId(), customer42);
@@ -58,7 +62,7 @@ public class DefaultPersistenceContextTest {
}
@Test
public void putIfAbsent_when_absent() throws Exception {
public void putIfAbsent_when_absent() {
PersistenceContext pc = pc();
Object existing = pc.putIfAbsent(Customer.class, customer42.getId(), customer42);
@@ -67,7 +71,7 @@ public class DefaultPersistenceContextTest {
}
@Test
public void putIfAbsent_when_notAbsent() throws Exception {
public void putIfAbsent_when_notAbsent() {
PersistenceContext pc = pcWith42();
Object existing = pc.putIfAbsent(Customer.class, customer42.getId(), new Customer());
@@ -76,21 +80,21 @@ public class DefaultPersistenceContextTest {
}
@Test
public void get_when_empty() throws Exception {
public void get_when_empty() {
PersistenceContext pc = pc();
Object found = pc.get(Customer.class, 42);
assertThat(found).isNull();
}
@Test
public void get_when_there() throws Exception {
public void get_when_there() {
PersistenceContext pc = pcWith42();
Object found = pc.get(Customer.class, 42);
assertThat(found).isSameAs(customer42);
}
@Test
public void getWithOption_when_empty() throws Exception {
public void getWithOption_when_empty() {
PersistenceContext pc = pc();
PersistenceContext.WithOption withOption = pc.getWithOption(Customer.class, 42);
@@ -98,7 +102,7 @@ public class DefaultPersistenceContextTest {
}
@Test
public void getWithOption_when_there() throws Exception {
public void getWithOption_when_there() {
PersistenceContext pc = pcWith42();
@@ -107,7 +111,7 @@ public class DefaultPersistenceContextTest {
}
@Test
public void getWithOption_when_deleted() throws Exception {
public void getWithOption_when_deleted() {
PersistenceContext pc = pcWith42();
pc.deleted(Customer.class, 42);
@@ -118,21 +122,21 @@ public class DefaultPersistenceContextTest {
}
@Test
public void size_when_empty() throws Exception {
public void size_when_empty() {
PersistenceContext pc = pc();
assertThat(pc.size(Customer.class)).isEqualTo(0);
}
@Test
public void size_when_some() throws Exception {
public void size_when_some() {
PersistenceContext pc = pcWith42();
assertThat(pc.size(Customer.class)).isEqualTo(1);
}
@Test
public void clear() throws Exception {
public void clear() {
PersistenceContext pc = pcWith42();
pc.clear();
@@ -140,7 +144,7 @@ public class DefaultPersistenceContextTest {
}
@Test
public void clearClass() throws Exception {
public void clearClass() {
PersistenceContext pc = pcWith42();
pc.clear(Customer.class);
@@ -148,7 +152,7 @@ public class DefaultPersistenceContextTest {
}
@Test
public void clearClassAndId() throws Exception {
public void clearClassAndId() {
PersistenceContext pc = pcWith42();
pc.put(Customer.class, 43, new Customer());
@@ -159,4 +163,94 @@ public class DefaultPersistenceContextTest {
pc.clear(Customer.class, 43);
assertThat(pc.size(Customer.class)).isEqualTo(0);
}
@Test
public void forIterate() {
final DefaultPersistenceContext pc = pcWith42();
// act
final PersistenceContext pcIterate = pc.forIterate();
assertThat(pc).isNotSameAs(pcIterate);
assertThat(pcIterate.size(Customer.class)).isEqualTo(1);
}
@Test
public void forIterate_many() {
DefaultPersistenceContext pc = new DefaultPersistenceContext();
addCustomers(pc, 1, 100);
addContacts(pc, 1, 1010);
assertThat(pc.size(Customer.class)).isEqualTo(100);
assertThat(pc.size(Contact.class)).isEqualTo(1010);
// act
final PersistenceContext pcIterate = pc.forIterate();
assertThat(pcIterate.size(Customer.class)).isEqualTo(100);
assertThat(pcIterate.size(Contact.class)).isEqualTo(1010);
}
@Test
public void forIterate_resetLimit_forIterateReset() {
DefaultPersistenceContext initialPc = new DefaultPersistenceContext();
addCustomers(initialPc, 1, 100);
addContacts(initialPc, 1, 1010);
final PersistenceContext pcIterate = initialPc.forIterate();
assertFalse(pcIterate.resetLimit());
// added 900 NEW contact beans
addContacts(pcIterate, 2000, 900);
assertThat(pcIterate.size(Contact.class)).isEqualTo(1910);
assertFalse(pcIterate.resetLimit());
// boundary, added 1000 NEW contact beans (still false)
addContacts(pcIterate, 3000, 100);
assertFalse(pcIterate.resetLimit());
addContacts(pcIterate, 4000, 1);
addProducts(pcIterate, 1, 100);
// ACT - over 1000 added beans boundary for contacts so returns true
assertTrue(pcIterate.resetLimit());
assertThat(pcIterate.size(Contact.class)).isEqualTo(2011);
assertThat(pcIterate.size(Customer.class)).isEqualTo(100);
assertThat(pcIterate.size(Product.class)).isEqualTo(100);
// ACT - obtain new PC forIterateReset
PersistenceContext pcReset = pcIterate.forIterateReset();
// keeps original customer beans as new added beans there
assertThat(pcReset.size(Customer.class)).isEqualTo(100); // customers didn't change
// added beans to contacts and products so those where reset
assertThat(pcReset.size(Contact.class)).isEqualTo(0);
assertThat(pcReset.size(Product.class)).isEqualTo(0);
}
@Test
public void toString_sillyTest() {
DefaultPersistenceContext pc = pcWith42();
assertThat(pc.toString()).contains("org.tests.model.basic.Customer");
}
private void addCustomers(PersistenceContext pc, int start, int loop) {
for (int i = start; i < start + loop; i++) {
Customer bean = new Customer();
bean.setId(i);
pc.put(Customer.class, i, bean);
}
}
private void addContacts(PersistenceContext pc, int start, int loop) {
for (int i = start; i < start + loop; i++) {
Contact bean = new Contact();
bean.setId(i);
pc.put(Contact.class, i, bean);
}
}
private void addProducts(PersistenceContext pc, int start, int loop) {
for (int i = start; i < start + loop; i++) {
Product bean = new Product();
bean.setId(i);
pc.put(Product.class, i, bean);
}
}
}