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schauderschauder
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Polishing.
This change extracts entity modifying behaviour into separate methods, so it doesn't appear as an unexpected side effect of the creation of aggregate changes. Also some formatting. Original pull request #1196 See #1137
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+64
-31
lines changed

3 files changed

+64
-31
lines changed

‎spring-data-jdbc/src/main/java/org/springframework/data/jdbc/core/JdbcAggregateTemplate.java‎

Lines changed: 38 additions & 15 deletions
Original file line numberDiff line numberDiff line change
@@ -150,8 +150,9 @@ public <T> T save(T instance) {
150150

151151
RelationalPersistentEntity<?> persistentEntity = context.getRequiredPersistentEntity(instance.getClass());
152152

153-
Function<T, MutableAggregateChange<T>> changeCreator = persistentEntity.isNew(instance) ? this::createInsertChange
154-
: this::createUpdateChange;
153+
Function<T, MutableAggregateChange<T>> changeCreator = persistentEntity.isNew(instance)
154+
? entity -> createInsertChange(prepareVersionForInsert(entity))
155+
: entity -> createUpdateChange(prepareVersionForUpdate(entity));
155156

156157
return store(instance, changeCreator, persistentEntity);
157158
}
@@ -170,7 +171,7 @@ public <T> T insert(T instance) {
170171

171172
RelationalPersistentEntity<?> persistentEntity = context.getRequiredPersistentEntity(instance.getClass());
172173

173-
return store(instance, this::createInsertChange, persistentEntity);
174+
return store(instance, entity -> createInsertChange(prepareVersionForInsert(entity)), persistentEntity);
174175
}
175176

176177
/**
@@ -187,7 +188,7 @@ public <T> T update(T instance) {
187188

188189
RelationalPersistentEntity<?> persistentEntity = context.getRequiredPersistentEntity(instance.getClass());
189190

190-
return store(instance, this::createUpdateChange, persistentEntity);
191+
return store(instance, entity -> createUpdateChange(prepareVersionForUpdate(entity)), persistentEntity);
191192
}
192193

193194
/*
@@ -365,6 +366,21 @@ private <T> void deleteTree(Object id, @Nullable T entity, Class<T> domainType)
365366

366367
private <T> MutableAggregateChange<T> createInsertChange(T instance) {
367368

369+
MutableAggregateChange<T> aggregateChange = MutableAggregateChange.forSave(instance);
370+
jdbcEntityInsertWriter.write(instance, aggregateChange);
371+
return aggregateChange;
372+
}
373+
374+
private <T> MutableAggregateChange<T> createUpdateChange(EntityAndPreviousVersion<T> entityAndVersion) {
375+
376+
MutableAggregateChange<T> aggregateChange = MutableAggregateChange.forSave(entityAndVersion.entity,
377+
entityAndVersion.version);
378+
jdbcEntityUpdateWriter.write(entityAndVersion.entity, aggregateChange);
379+
return aggregateChange;
380+
}
381+
382+
private <T> T prepareVersionForInsert(T instance) {
383+
368384
RelationalPersistentEntity<T> persistentEntity = getRequiredPersistentEntity(instance);
369385
T preparedInstance = instance;
370386
if (persistentEntity.hasVersionProperty()) {
@@ -375,31 +391,26 @@ private <T> MutableAggregateChange<T> createInsertChange(T instance) {
375391
preparedInstance = RelationalEntityVersionUtils.setVersionNumberOnEntity( //
376392
instance, initialVersion, persistentEntity, converter);
377393
}
378-
MutableAggregateChange<T> aggregateChange = MutableAggregateChange.forSave(preparedInstance);
379-
jdbcEntityInsertWriter.write(preparedInstance, aggregateChange);
380-
return aggregateChange;
394+
return preparedInstance;
381395
}
382396

383-
private <T> MutableAggregateChange<T> createUpdateChange(T instance) {
397+
private <T> EntityAndPreviousVersion<T> prepareVersionForUpdate(T instance) {
384398

385399
RelationalPersistentEntity<T> persistentEntity = getRequiredPersistentEntity(instance);
386400
T preparedInstance = instance;
387401
Number previousVersion = null;
388402
if (persistentEntity.hasVersionProperty()) {
389403
// If the root aggregate has a version property, increment it.
390-
previousVersion = RelationalEntityVersionUtils.getVersionNumberFromEntity(instance,
391-
persistentEntity, converter);
404+
previousVersion = RelationalEntityVersionUtils.getVersionNumberFromEntity(instance, persistentEntity, converter);
392405

393406
Assert.notNull(previousVersion, "The root aggregate cannot be updated because the version property is null.");
394407

395408
long newVersion = previousVersion.longValue() + 1;
396409

397-
preparedInstance = RelationalEntityVersionUtils.setVersionNumberOnEntity(instance, newVersion,
398-
persistentEntity, converter);
410+
preparedInstance = RelationalEntityVersionUtils.setVersionNumberOnEntity(instance, newVersion, persistentEntity,
411+
converter);
399412
}
400-
MutableAggregateChange<T> aggregateChange = MutableAggregateChange.forSave(preparedInstance, previousVersion);
401-
jdbcEntityUpdateWriter.write(preparedInstance, aggregateChange);
402-
return aggregateChange;
413+
return new EntityAndPreviousVersion<>(preparedInstance, previousVersion);
403414
}
404415

405416
@SuppressWarnings("unchecked")
@@ -489,4 +500,16 @@ private <T> T triggerBeforeDelete(@Nullable T aggregateRoot, Object id, MutableA
489500

490501
return null;
491502
}
503+
504+
private static class EntityAndPreviousVersion<T> {
505+
506+
private final T entity;
507+
private final Number version;
508+
509+
EntityAndPreviousVersion(T entity, @Nullable Number version) {
510+
511+
this.entity = entity;
512+
this.version = version;
513+
}
514+
}
492515
}

‎spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/JdbcAggregateTemplateIntegrationTests.java‎

Lines changed: 8 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -821,9 +821,10 @@ void saveAndUpdateAggregateWithImmutableVersion() {
821821

822822
@Test // GH-1137
823823
void testUpdateEntityWithVersionDoesNotTriggerAnewConstructorInvocation() {
824+
824825
AggregateWithImmutableVersion aggregateWithImmutableVersion = new AggregateWithImmutableVersion(null, null);
825826

826-
final AggregateWithImmutableVersion savedRoot = template.save(aggregateWithImmutableVersion);
827+
AggregateWithImmutableVersion savedRoot = template.save(aggregateWithImmutableVersion);
827828

828829
assertThat(savedRoot).isNotNull();
829830
assertThat(savedRoot.version).isEqualTo(0L);
@@ -836,12 +837,12 @@ void testUpdateEntityWithVersionDoesNotTriggerAnewConstructorInvocation() {
836837

837838
AggregateWithImmutableVersion.clearConstructorInvocationData();
838839

839-
final AggregateWithImmutableVersion updatedRoot = template.save(savedRoot);
840+
AggregateWithImmutableVersion updatedRoot = template.save(savedRoot);
840841

841842
assertThat(updatedRoot).isNotNull();
842843
assertThat(updatedRoot.version).isEqualTo(1L);
843844

844-
// Expect only one assignnment of the version to AggregateWithImmutableVersion
845+
// Expect only one assignment of the version to AggregateWithImmutableVersion
845846
assertThat(AggregateWithImmutableVersion.constructorInvocations).containsOnly(new ConstructorInvocation(savedRoot.id, updatedRoot.version));
846847
}
847848

@@ -1261,6 +1262,7 @@ public static void clearConstructorInvocationData() {
12611262
}
12621263

12631264
public AggregateWithImmutableVersion(Long id, Long version) {
1265+
12641266
constructorInvocations.add(new ConstructorInvocation(id, version));
12651267
this.id = id;
12661268
this.version = version;
@@ -1270,8 +1272,9 @@ public AggregateWithImmutableVersion(Long id, Long version) {
12701272
@Value
12711273
@EqualsAndHashCode
12721274
private static class ConstructorInvocation {
1273-
private Long id;
1274-
private Long version;
1275+
1276+
Long id;
1277+
Long version;
12751278
}
12761279

12771280
@Data

‎spring-data-jdbc/src/test/java/org/springframework/data/jdbc/core/JdbcAggregateTemplateUnitTests.java‎

Lines changed: 18 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -22,8 +22,8 @@
2222

2323
import lombok.AllArgsConstructor;
2424
import lombok.Data;
25-
2625
import lombok.RequiredArgsConstructor;
26+
2727
import org.junit.jupiter.api.BeforeEach;
2828
import org.junit.jupiter.api.Test;
2929
import org.junit.jupiter.api.extension.ExtendWith;
@@ -115,7 +115,7 @@ public void callbackOnSave() {
115115
assertThat(last).isEqualTo(third);
116116
}
117117

118-
@Test
118+
@Test // GH-1137
119119
void savePreparesInstanceWithInitialVersion_onInsert() {
120120

121121
EntityWithVersion entity = new EntityWithVersion(1L);
@@ -125,11 +125,12 @@ void savePreparesInstanceWithInitialVersion_onInsert() {
125125

126126
ArgumentCaptor<Object> aggregateRootCaptor = ArgumentCaptor.forClass(Object.class);
127127
verify(callbacks).callback(eq(BeforeSaveCallback.class), aggregateRootCaptor.capture(), any());
128+
128129
EntityWithVersion afterConvert = (EntityWithVersion) aggregateRootCaptor.getValue();
129130
assertThat(afterConvert.getVersion()).isEqualTo(0L);
130131
}
131132

132-
@Test
133+
@Test // GH-1137
133134
void savePreparesInstanceWithInitialVersion_onInsert_whenVersionPropertyIsImmutable() {
134135

135136
EntityWithImmutableVersion entity = new EntityWithImmutableVersion(1L, null);
@@ -139,11 +140,12 @@ void savePreparesInstanceWithInitialVersion_onInsert_whenVersionPropertyIsImmuta
139140

140141
ArgumentCaptor<Object> aggregateRootCaptor = ArgumentCaptor.forClass(Object.class);
141142
verify(callbacks).callback(eq(BeforeSaveCallback.class), aggregateRootCaptor.capture(), any());
143+
142144
EntityWithImmutableVersion afterConvert = (EntityWithImmutableVersion) aggregateRootCaptor.getValue();
143145
assertThat(afterConvert.getVersion()).isEqualTo(0L);
144146
}
145147

146-
@Test // DATAJDBC-507
148+
@Test // GH-1137
147149
void savePreparesInstanceWithInitialVersion_onInsert_whenVersionPropertyIsPrimitiveType() {
148150

149151
EntityWithPrimitiveVersion entity = new EntityWithPrimitiveVersion(1L);
@@ -153,11 +155,12 @@ void savePreparesInstanceWithInitialVersion_onInsert_whenVersionPropertyIsPrimit
153155

154156
ArgumentCaptor<Object> aggregateRootCaptor = ArgumentCaptor.forClass(Object.class);
155157
verify(callbacks).callback(eq(BeforeSaveCallback.class), aggregateRootCaptor.capture(), any());
158+
156159
EntityWithPrimitiveVersion afterConvert = (EntityWithPrimitiveVersion) aggregateRootCaptor.getValue();
157160
assertThat(afterConvert.getVersion()).isEqualTo(1L);
158161
}
159162

160-
@Test // DATAJDBC-507
163+
@Test // GH-1137
161164
void savePreparesInstanceWithInitialVersion_onInsert__whenVersionPropertyIsImmutableAndPrimitiveType() {
162165

163166
EntityWithImmutablePrimitiveVersion entity = new EntityWithImmutablePrimitiveVersion(1L, 0L);
@@ -167,11 +170,13 @@ void savePreparesInstanceWithInitialVersion_onInsert__whenVersionPropertyIsImmut
167170

168171
ArgumentCaptor<Object> aggregateRootCaptor = ArgumentCaptor.forClass(Object.class);
169172
verify(callbacks).callback(eq(BeforeSaveCallback.class), aggregateRootCaptor.capture(), any());
170-
EntityWithImmutablePrimitiveVersion afterConvert = (EntityWithImmutablePrimitiveVersion) aggregateRootCaptor.getValue();
173+
174+
EntityWithImmutablePrimitiveVersion afterConvert = (EntityWithImmutablePrimitiveVersion) aggregateRootCaptor
175+
.getValue();
171176
assertThat(afterConvert.getVersion()).isEqualTo(1L);
172177
}
173178

174-
@Test
179+
@Test // GH-1137
175180
void savePreparesChangeWithPreviousVersion_onUpdate() {
176181

177182
when(dataAccessStrategy.updateWithVersion(any(), any(), any())).thenReturn(true);
@@ -183,11 +188,12 @@ void savePreparesChangeWithPreviousVersion_onUpdate() {
183188

184189
ArgumentCaptor<Object> aggregateChangeCaptor = ArgumentCaptor.forClass(Object.class);
185190
verify(callbacks).callback(eq(BeforeSaveCallback.class), any(), aggregateChangeCaptor.capture());
191+
186192
MutableAggregateChange<?> aggregateChange = (MutableAggregateChange<?>) aggregateChangeCaptor.getValue();
187193
assertThat(aggregateChange.getPreviousVersion()).isEqualTo(1L);
188194
}
189195

190-
@Test
196+
@Test // GH-1137
191197
void savePreparesInstanceWithNextVersion_onUpdate() {
192198

193199
when(dataAccessStrategy.updateWithVersion(any(), any(), any())).thenReturn(true);
@@ -199,11 +205,12 @@ void savePreparesInstanceWithNextVersion_onUpdate() {
199205

200206
ArgumentCaptor<Object> aggregateRootCaptor = ArgumentCaptor.forClass(Object.class);
201207
verify(callbacks).callback(eq(BeforeSaveCallback.class), aggregateRootCaptor.capture(), any());
208+
202209
EntityWithVersion afterConvert = (EntityWithVersion) aggregateRootCaptor.getValue();
203210
assertThat(afterConvert.getVersion()).isEqualTo(2L);
204211
}
205212

206-
@Test
213+
@Test // GH-1137
207214
void savePreparesInstanceWithNextVersion_onUpdate_whenVersionPropertyIsImmutable() {
208215

209216
when(dataAccessStrategy.updateWithVersion(any(), any(), any())).thenReturn(true);
@@ -218,7 +225,7 @@ void savePreparesInstanceWithNextVersion_onUpdate_whenVersionPropertyIsImmutable
218225
assertThat(afterConvert.getVersion()).isEqualTo(2L);
219226
}
220227

221-
@Test
228+
@Test // GH-1137
222229
void deletePreparesChangeWithPreviousVersion_onDeleteByInstance() {
223230

224231
EntityWithImmutableVersion entity = new EntityWithImmutableVersion(1L, 1L);
@@ -228,11 +235,11 @@ void deletePreparesChangeWithPreviousVersion_onDeleteByInstance() {
228235

229236
ArgumentCaptor<Object> aggregateChangeCaptor = ArgumentCaptor.forClass(Object.class);
230237
verify(callbacks).callback(eq(BeforeDeleteCallback.class), any(), aggregateChangeCaptor.capture());
238+
231239
MutableAggregateChange<?> aggregateChange = (MutableAggregateChange<?>) aggregateChangeCaptor.getValue();
232240
assertThat(aggregateChange.getPreviousVersion()).isEqualTo(1L);
233241
}
234242

235-
236243
@Test // DATAJDBC-393
237244
public void callbackOnDelete() {
238245

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