Examples with InstantiatorFactory com.vaadin.flow.di.InstantiatorFactory used on opensource projects

Example 1 with InstantiatorFactory

use of com.vaadin.flow.di.InstantiatorFactory in project flow by vaadin.

the class VaadinServiceTest method loadInstantiators_twoFactoriesInLookup_throws.

@Test(expected = ServiceException.class)
public void loadInstantiators_twoFactoriesInLookup_throws() throws ServiceException {
    VaadinService service = createService();
    Lookup lookup = Mockito.mock(Lookup.class);
    service.getContext().setAttribute(Lookup.class, lookup);
    InstantiatorFactory factory1 = createInstantiatorFactory(lookup);
    InstantiatorFactory factory2 = createInstantiatorFactory(lookup);
    Mockito.when(lookup.lookupAll(InstantiatorFactory.class)).thenReturn(Arrays.asList(factory1, factory2));
    service.loadInstantiators();
}

Example 2 with InstantiatorFactory

use of com.vaadin.flow.di.InstantiatorFactory in project flow by vaadin.

the class VaadinServiceTest method createInstantiatorFactory.

private InstantiatorFactory createInstantiatorFactory(Lookup lookup) {
    InstantiatorFactory factory = Mockito.mock(InstantiatorFactory.class);
    Instantiator instantiator = Mockito.mock(Instantiator.class);
    Mockito.when((factory.createInstantitor(Mockito.any()))).thenReturn(instantiator);
    Mockito.when(instantiator.init(Mockito.any())).thenReturn(true);
    return factory;
}

Example 3 with InstantiatorFactory

use of com.vaadin.flow.di.InstantiatorFactory in project flow by vaadin.

the class VaadinServiceTest method loadInstantiators_instantiatorIsLoadedUsingFactoryFromLookup.

@Test
public void loadInstantiators_instantiatorIsLoadedUsingFactoryFromLookup() throws ServiceException {
    VaadinService service = createService();
    Lookup lookup = Mockito.mock(Lookup.class);
    service.getContext().setAttribute(Lookup.class, lookup);
    InstantiatorFactory factory = createInstantiatorFactory(lookup);
    Mockito.when(lookup.lookupAll(InstantiatorFactory.class)).thenReturn(Collections.singletonList(factory));
    Optional<Instantiator> loadedInstantiator = service.loadInstantiators();
    Instantiator instantiator = factory.createInstantitor(null);
    Assert.assertSame(instantiator, loadedInstantiator.get());
}

Example 4 with InstantiatorFactory

use of com.vaadin.flow.di.InstantiatorFactory in project flow by vaadin.

the class VaadinService method loadInstantiators.

/**
 * Loads and initializes instantiators.
 * <p>
 * A custom Vaadin service implementation can override this method to pick
 * an instantiator in some other way instead of the default implementation
 * that uses {@link ServiceLoader}.
 * <p>
 * There may be only one applicable instantiator. Otherwise
 * {@link ServiceException} will be thrown.
 *
 * @return an optional instantator, or an empty optional if no instantiator
 *         found
 * @throws ServiceException
 *             if there are multiple applicable instantiators
 * @see #createInstantiator()
 * @see Instantiator
 */
protected Optional<Instantiator> loadInstantiators() throws ServiceException {
    Lookup lookup = getContext().getAttribute(Lookup.class);
    List<Instantiator> instantiators = null;
    if (lookup != null) {
        // lookup may be null in tests
        Collection<InstantiatorFactory> factories = lookup.lookupAll(InstantiatorFactory.class);
        instantiators = new ArrayList<>(factories.size());
        for (InstantiatorFactory factory : factories) {
            Instantiator instantiator = factory.createInstantitor(this);
            // let's respect its deprecated method
            if (instantiator != null && instantiator.init(this)) {
                instantiators.add(instantiator);
            }
        }
    }
    if (instantiators == null) {
        instantiators = new ArrayList<>();
    }
    // the code to support previous way of loading instantiators
    StreamSupport.stream(ServiceLoader.load(Instantiator.class, getClassLoader()).spliterator(), false).filter(iterator -> iterator.init(this)).forEach(instantiators::add);
    if (instantiators.size() > 1) {
        throw new ServiceException("Cannot init VaadinService because there are multiple eligible instantiator implementations: " + instantiators);
    }
    return instantiators.stream().findFirst();
}