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POInner transaction changes not visible to outer transaction
 

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    <p>I'm using Spring3+JPA+Hibernate. I've tried to keep structure of the example similar to my actual code structure. Please scroll to the bottom for the actual question. Zipped maven project can be downloaded from www.esnips.com/nsdoc/da7a09c0-ce5a-4dbf-80a2-f414ea3bf333/?action=forceDL</p> <p>Following is the class under test.</p> <pre><code>public class ServiceImpl implements Service { @Autowired private DataAccessor dataAccessor; @Autowired private ServiceTransactions serviceTransactions; public Foo getFoo(long id) { return dataAccessor.getFoo(id); } public Foo createFoo(Foo foo) { return dataAccessor.createFoo(foo); } public Bar createBar(Bar bar) { return dataAccessor.createBar(bar); } @SuppressWarnings("unused") public Foo FooifyBar(long fooId, long barId) { Foo foo = dataAccessor.getFoo(fooId); Bar bar = dataAccessor.getBar(barId); return serviceTransactions.fooifyBar(fooId, barId, "Error"); } } </code></pre> <p>Following is the <code>ServiceTransactions</code> class.</p> <pre><code>public class ServiceTransactions { @Autowired private DataAccessor dataAccessor; @Transactional(propagation=Propagation.REQUIRES_NEW) public Foo fooifyBar(long fooId, long barId, String error) { Foo foo = dataAccessor.getFoo(fooId); Bar bar = dataAccessor.getBar(barId); return dataAccessor.fooifyBar(foo, bar, error); } } </code></pre> <p>Following is the implementation of <code>DataAccessor</code> in use.</p> <pre><code>public class DataAccessorImpl implements DataAccessor { @Autowired private DBController controller; @Transactional public Foo getFoo(long id) { FooDao food = controller.getFoo(id); return convertFoodToFoo(food); } @Transactional public Foo createFoo(Foo foo) { FooDao food = new FooDao(); food.setName(foo.getName()); return convertFoodToFoo(controller.createFoo(food)); } @Transactional public Bar getBar(long id) { return convertBardToBar(controller.getBar(id)); } @Transactional public Bar createBar(Bar bar) { BarDao bard = new BarDao(); bard.setName(bar.getName()); return convertBardToBar(controller.createBar(bard)); } @Transactional public Foo fooifyBar(Foo foo, Bar bar, String error) { return convertFoodToFoo(controller.fooBar(foo.getId(), bar.getId(), error)); } </code></pre> <p>Following is the implementation of <code>DBController</code></p> <pre><code>public class DBControllerImpl implements DBController { @PersistenceContext private EntityManager em; public FooDao getFoo(long id) { return em.find(FooDao.class, id); } public FooDao createFoo(FooDao foo) { em.persist(foo); return foo; } public BarDao getBar(long id) { return em.find(BarDao.class, id); } public BarDao createBar(BarDao bar) { em.persist(bar); return bar; } public FooDao fooBar(long fooId, long barId, String error) { FooDao foo = em.find(FooDao.class, fooId); FooedBarDao fb = new FooedBarDao(); fb.setFoo(foo); fb.setBar(em.find(BarDao.class, barId)); fb.setError(error); em.persist(fb); foo.getFooedBars().add(fb); em.merge(foo); return foo; } </code></pre> <p>And finally the test class</p> <pre><code>@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations="/testContext.xml") public class TestFooBar { @Autowired private Service service; Foo foo; Bar bar; @BeforeTransaction public void before() { foo = new Foo(); foo.setName("foo"); foo = service.createFoo(foo); bar = new Bar(); bar.setName("bar"); bar = service.createBar(bar); } @Test @Transactional public void testFooingBar() { service.FooifyBar(foo.getId(), bar.getId()); Foo foo2 = service.getFoo(foo.getId()); Assert.assertEquals(1, foo2.getFooedBars().size()); } </code></pre> <p><strong>Now the question is</strong> the test case fails with error <code>testFooingBar(com.test.sscce.server.TestFooBar): expected:&lt;1&gt; but was:&lt;0&gt;</code> in the form given above. If I modify the <code>FooifyBar</code> method in <code>ServiceImpl</code> class and remove the calls to <code>getFoo</code> and <code>getBar</code>, the test case succeeds without error. This means changes made by <code>fooifyBar</code> are not visible to the test method, if <code>getFoo</code> occurs before <code>fooifyBar</code>. Why is that?</p>
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    1. USLalit Mishra
    1. USLalit Mishra
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