[#2055] Add test for temporary table strategies

The test is for temporary tables created for
storing ids

hibernate-reactive-core/src/test/java/org/hibernate/reactive/schema/TemporaryIdTableStrategyTest.java

@@ -0,0 +1,236 @@
+/* Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright: Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.reactive.schema;
+
+import java.util.Collection;
+import java.util.Set;
+import java.util.concurrent.CompletionStage;
+import java.util.stream.Stream;
+
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+import org.hibernate.cfg.Configuration;
+import org.hibernate.dialect.Dialect;
+import org.hibernate.dialect.temptable.TemporaryTable;
+import org.hibernate.query.sqm.mutation.internal.temptable.GlobalTemporaryTableStrategy;
+import org.hibernate.query.sqm.mutation.internal.temptable.PersistentTableStrategy;
+import org.hibernate.reactive.BaseReactiveTest;
+import org.hibernate.reactive.annotations.EnabledFor;
+import org.hibernate.reactive.provider.Settings;
+import org.hibernate.reactive.testing.SqlStatementTracker;
+import org.hibernate.reactive.util.impl.CompletionStages;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import io.vertx.junit5.Timeout;
+import io.vertx.junit5.VertxTestContext;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.Inheritance;
+import jakarta.persistence.InheritanceType;
+
+import static java.util.concurrent.TimeUnit.MINUTES;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.COCKROACHDB;
+import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.ORACLE;
+import static org.hibernate.reactive.util.impl.CompletionStages.voidFuture;
+import static org.junit.jupiter.params.provider.Arguments.arguments;
+
+/**
+ * Test enabling and disabling of strategies for the creation of temporary tables to store ids.
+ *
+ * @see GlobalTemporaryTableStrategy
+ * @see PersistentTableStrategy
+ */
+@Timeout(value = 10, timeUnit = MINUTES)
+public class TemporaryIdTableStrategyTest extends BaseReactiveTest {
+	private static SqlStatementTracker sqlStatementTracker;
+
+	final static Dialect[] dialect = new Dialect[1];
+
+	@Override
+	protected Collection<Class<?>> annotatedEntities() {
+		return Set.of( Engineer.class, Doctor.class, Person.class );
+	}
+
+	public static Stream<Arguments> settings() {
+		return Stream.of(
+				arguments( true, 1, true, 1 ),
+				arguments( true, 1, false, 0 ),
+				// I'm assuming Hibernate won't drop the id tables if they haven't been created
+				arguments( false, 0, true, 0 ),
+				arguments( false, 0, false, 0 )
+		);
+	}
+
+	@Override
+	protected Configuration constructConfiguration() {
+		Configuration configuration = super.constructConfiguration();
+		configuration.setProperty( Settings.HBM2DDL_AUTO, "create" );
+		// Collect all the logs, we are going to filter them later
+		sqlStatementTracker = new SqlStatementTracker( s -> true, configuration.getProperties() );
+		return configuration;
+	}
+
+	@Override
+	public CompletionStage<Void> deleteEntities(Class<?>... entities) {
+		// Deleting entities is not necessary for this test
+		return voidFuture();
+	}
+
+	@Override
+	public void before(VertxTestContext context) {
+		// We need to start and close our own session factories for the test
+	}
+
+	@AfterEach
+	@Override
+	public void after(VertxTestContext context) {
+		sqlStatementTracker.clear();
+		super.after( context );
+	}
+
+	@Override
+	protected void addServices(StandardServiceRegistryBuilder builder) {
+		if ( sqlStatementTracker != null ) {
+			sqlStatementTracker.registerService( builder );
+		}
+	}
+
+	@ParameterizedTest(name = "Global Temporary tables - create: {0}, drop: {2}")
+	@MethodSource("settings")
+	@EnabledFor(value = ORACLE, reason = "It uses GlobalTemporaryTableStrategy by default")
+	public void testGlobalTemporaryTablesStrategy(
+			boolean enableCreateIdTables,
+			// Expected number of temporary tables created
+			int expectedTempTablesCreated,
+			boolean enableDropIdTables,
+			// Expected number of temporary tables dropped
+			int expectedTempTablesDropped,
+			VertxTestContext context) {
+		Configuration configuration = constructConfiguration();
+		configuration.setProperty( GlobalTemporaryTableStrategy.CREATE_ID_TABLES, enableCreateIdTables );
+		configuration.setProperty( GlobalTemporaryTableStrategy.DROP_ID_TABLES, enableDropIdTables );
+
+		testTemporaryIdTablesCreationAndDropping( configuration, expectedTempTablesCreated, expectedTempTablesDropped, context );
+	}
+
+	@ParameterizedTest(name = "Persistent tables - create: {0}, drop: {2}")
+	@MethodSource("settings")
+	@EnabledFor(value = COCKROACHDB, reason = "It uses PersistentTemporaryTableStrategy by default")
+	public void testPersistentTemporaryTablesStrategy(
+			boolean enableCreateIdTables,
+			// Expected number of temporary tables created
+			int expectedTempTablesCreated,
+			boolean enableDropIdTables,
+			// Expected number of temporary tables dropped
+			int expectedTempTablesDropped,
+			VertxTestContext context) {
+
+		Configuration configuration = constructConfiguration();
+		configuration.setProperty( PersistentTableStrategy.CREATE_ID_TABLES, enableCreateIdTables );
+		configuration.setProperty( PersistentTableStrategy.DROP_ID_TABLES, enableDropIdTables );
+
+		testTemporaryIdTablesCreationAndDropping( configuration, expectedTempTablesCreated, expectedTempTablesDropped, context );
+	}
+
+	private void testTemporaryIdTablesCreationAndDropping(
+			Configuration configure,
+			int expectedTempTablesCreated,
+			int expectedTempTablesDropped,
+			VertxTestContext context) {
+		test( context, setupSessionFactory( configure )
+				.thenCompose( v -> getSessionFactory().withSession( s -> {
+					dialect[0] = getDialect();
+					assertThat( commandsCount( dialect[0].getTemporaryTableCreateCommand() ) )
+							.as( "Unexpected number of temporary tables for ids CREATED" )
+							.isEqualTo( expectedTempTablesCreated );
+					sqlStatementTracker.clear();
+					return voidFuture();
+				} ) )
+				// to ensure the factory is always closed even in case of exceptions
+				.handle( CompletionStages::handle )
+				.thenCompose( this::closeFactory )
+				.thenAccept( v -> assertThat( commandsCount( dialect[0].getTemporaryTableDropCommand() ) )
+						.as( "Unexpected number of temporary tables for ids DROPPED" )
+						.isEqualTo( expectedTempTablesDropped ) )
+		);
+	}
+
+	// Always try to close the factory without losing the original error (if there was one)
+	private CompletionStage<Void> closeFactory(CompletionStages.CompletionStageHandler<Void, Throwable> handler) {
+		return factoryManager.stop()
+				.handle( CompletionStages::handle )
+				.thenCompose( factoryHandler -> handler
+						.getResultAsCompletionStage()
+						// When there's already an exception, we don't care about errors closing the factory
+						.thenCompose( factoryHandler::getResultAsCompletionStage ) );
+	}
+
+	private static long commandsCount(String temporaryTableCommand) {
+		return sqlStatementTracker.getLoggedQueries().stream()
+				.filter( q -> q.startsWith( temporaryTableCommand ) && q.contains( TemporaryTable.ID_TABLE_PREFIX ) )
+				.count();
+	}
+
+	@Entity(name = "Person")
+	@Inheritance(strategy = InheritanceType.JOINED)
+	public static class Person {
+
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		private String name;
+
+		private boolean employed;
+
+		public Long getId() {
+			return id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public void setName(String name) {
+			this.name = name;
+		}
+
+		public boolean isEmployed() {
+			return employed;
+		}
+
+		public void setEmployed(boolean employed) {
+			this.employed = employed;
+		}
+	}
+
+	@Entity(name = "Doctor")
+	public static class Doctor extends Person {
+	}
+
+	@Entity(name = "Engineer")
+	public static class Engineer extends Person {
+
+		private boolean fellow;
+
+		public boolean isFellow() {
+			return fellow;
+		}
+
+		public void setFellow(boolean fellow) {
+			this.fellow = fellow;
+		}
+	}
+}