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DatabaseCleanup.java
63 lines (51 loc) · 2.34 KB
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DatabaseCleanup.java
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package share_diary.diray;
import com.google.common.base.CaseFormat;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
import javax.persistence.Entity;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Table;
import javax.persistence.metamodel.EntityType;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
@Component
public class DatabaseCleanup implements InitializingBean {
@PersistenceContext
private EntityManager entityManager;
private List<String> tableNames;
@Override
public void afterPropertiesSet() {
final Set<EntityType<?>> entities = entityManager.getMetamodel().getEntities();
tableNames = entities.stream()
.filter(e -> isEntity(e) && hasTableAnnotation(e))
.map(e -> {
String tableName = e.getJavaType().getAnnotation(Table.class).name();
return tableName.isBlank() ? CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, e.getName()) : tableName;
})
.collect(Collectors.toList());
final List<String> entityNames = entities.stream()
.filter(e -> isEntity(e) && !hasTableAnnotation(e))
.map(e -> CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, e.getName()))
.collect(Collectors.toList());
tableNames.addAll(entityNames);
}
private boolean isEntity(final EntityType<?> e) {
return null != e.getJavaType().getAnnotation(Entity.class);
}
private boolean hasTableAnnotation(final EntityType<?> e) {
return null != e.getJavaType().getAnnotation(Table.class);
}
@Transactional
public void execute() {
entityManager.flush();
entityManager.createNativeQuery("SET REFERENTIAL_INTEGRITY FALSE").executeUpdate();
for (final String tableName : tableNames) {
entityManager.createNativeQuery("TRUNCATE TABLE " + tableName).executeUpdate();
entityManager.createNativeQuery("ALTER TABLE " + tableName + " ALTER COLUMN ID RESTART WITH 1").executeUpdate();
}
entityManager.createNativeQuery("SET REFERENTIAL_INTEGRITY TRUE").executeUpdate();
}
}