48 lines
1.6 KiB
Java
Executable File
48 lines
1.6 KiB
Java
Executable File
package com.ankurm.hibernatedemo;
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import static org.assertj.core.api.Assertions.assertThat;
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import com.ankurm.hibernatedemo.model.WidgetIdentity;
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import jakarta.persistence.EntityManager;
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import jakarta.persistence.EntityManagerFactory;
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import org.hibernate.SessionFactory;
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import org.hibernate.stat.Statistics;
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import org.junit.jupiter.api.Test;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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/**
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* Backs ankurm.com post 4861. Docs: docs/03-inserting-objects.md.
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* Run with {@code ./mvnw -Dtest=IdentityBatchTest test}.
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*/
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@SpringBootTest
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class IdentityBatchTest {
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private static final int ROW_COUNT = 30;
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@Autowired
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private EntityManagerFactory emf;
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@Test
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void identityGeneratorDisablesBatching_despiteBatchSizeBeingSet() {
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SessionFactory sessionFactory = emf.unwrap(SessionFactory.class);
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Statistics stats = sessionFactory.getStatistics();
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stats.clear();
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EntityManager em = emf.createEntityManager();
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em.getTransaction().begin();
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for (int i = 1; i <= ROW_COUNT; i++) {
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em.persist(new WidgetIdentity("identity-" + i));
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}
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em.getTransaction().commit();
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em.close();
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assertThat(stats.getEntityInsertCount()).isEqualTo(ROW_COUNT);
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assertThat(stats.getPrepareStatementCount())
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.as("with GenerationType.IDENTITY, hibernate.jdbc.batch_size has nothing to batch -- "
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+ "every insert is its own round trip because the generated key is only "
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+ "known after the row is written")
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.isEqualTo(ROW_COUNT);
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}
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}
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