I have a test calling a transactional method on a separate thread like so:
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration("classpath:application-context.xml")
public class Test {
#Autowired
DatabaseBatchService databaseBatchService;
#Test
#Transactional
public void testConcurrentSaves() {
Entity e = Entity.createNew();
databaseBatchService.insert(e);
// Check database for inserted entities
}
}
#Component
class DatabaseBatchService implements Runnable {
#PostConstruct
public void init() {
Executors.newSingleThreadScheculedExecutor()
.scheduleAtFixedRate(this, 0, 100, TimeUnit.MILLISECONDS);
}
public synchronized void submit(Entity e) {
// cache entity
}
#Transactional
private synchronized void save() {
// insert cached entities
}
#Override
public void run() {
this.save();
}
}
As the entity is inserted, using logging I can see it appearing in the database. However when I check the state of the database at the end of the test method, the database is empty.
I understand that this is due to the transaction for the thread being rolled back.
From the test, how can I commit these transactions so that the inserted data is available for the test method to see?
Related
So, I have this page:
#Named("ManagementPage")
#ViewScoped
#Getter
#Setter
#Join(path = "/{appScope}/admin/management",
to = "/pages/scoped/managementOverview.xhtml")
#Page(
group = "kitchen",
icon = "mdi mdi-comment-text",
key = "management",
navigation = Page.Navigation.ADMIN_SCOPED,
outcome = "/pages/scoped/managementOverview.xhtml",
auth = #PageAuth(value = "MANAGER_ACCESS", scoped = true))
public class ManagementPage implements Serializable {
private static final long serialVersionUID = 1L;
#Inject
private ManagementModel model;
#PostConstruct
public void init() {
this.model.init();
}
}
It's ViewScoped. And the model for it is:
#Log4j
#Dependent
#Getter
#Setter
public class ManagementModel implements Serializable {
...
}
I want, whenever I receive an event, to refresh some UI on the frontend (I'm using JSF). For that, I've created this dispatcher:
#ApplicationScoped
public class OrderEventDispatcher {
private static final List<ManagementModel> subscriptions = new ArrayList<>();
public static void addSubscriber(ManagementModel subscriber) {
subscriptions.add(subscriber);
}
public static void removeSubscriber(ManagementModel subscriber) {
subscriptions.remove(subscriber);
}
public void observerOrderCreated(#Observes FrontendEvent frontendEvent) {
if(frontendEvent instanceof ContentItemCreatedEvent){
if(!"order".equals(((ContentItemCreatedEvent) frontendEvent).getTypeKey())){
return;
}
}
if(frontendEvent instanceof ContentItemChangedEvent){
if(!"order".equals(((ContentItemChangedEvent) frontendEvent).getTypeKey())){
return;
}
}
subscriptions.forEach(ManagementModel::orderInit);
}
}
(I have implemented a proper equals for this in my model)
For my dispatcher to work, I'm subcribing with my model to it (the methods are inside the model)
#PostConstruct
public void init() {
id = totalIds++;
OrderEventDispatcher.addSubscriber(this);
...
And then i unsubscribe before I destroy the model:
#PreDestroy
public void preDestroy() {
OrderEventDispatcher.removeSubscriber(this);
}
And finally, the methods I call from my dispatcher:
public void orderInit() {
loadMergedOrders();
initializeDonut();
PrimeFaces.current().executeScript("orderInit()");
}
I'm doing all this in order to refresh my page (even when multiple instance of the same page are open) in reaction to an event (some item is created/deleted/modified, of that the FrontendEvent takes care). Now the issue is that my PrimeFaces.current() is always returning null, I've added a breakpoint in the init() method and I tried using PrimeFaces.current() and it worked then, but then when I went through the Dispatcher and into the orderInit() with the debugger I've seen that PrimeFaces.current() now returns null. Does anyone have any idea what I'm doing wrong? If not how to fix this then maybe a different approach to solving this. Thanks for your time!
I have a UserServiceTest, I want to init load some user data to database for tests e.g. queryByName, groupByAge and so on . And I want to only load once in this class, so I want to use BeforeClass
#BeforeClass
public static void init(){
// ...
}
but in this case I find I cannot use jdbcTemplate to insert data just like in Before e.g.
#Before
public void setUp(){
// prepare test data first
jdbcTemplate.execute("insert into user(firstname,lastname,birthday) values(...);");
}
So in BeforeClass method how to insert init data?
Alternatively you can use TestExecutionListeners in order to initialise your database before test class.
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(classes = TestConfig.class)
#TestExecutionListeners(mergeMode = TestExecutionListeners.MergeMode.MERGE_WITH_DEFAULTS, listeners = {
DbInitializerTestListener.class })
public class DbTest {
}
public class DbInitializerTestListener extends AbstractTestExecutionListener {
#Autowired
private JdbcTemplate jdbcTemplate;
#Override
public void beforeTestClass(TestContext testContext) throws Exception {
testContext.getApplicationContext()
.getAutowireCapableBeanFactory()
.autowireBean(this);
jdbcTemplate.execute("insert into user(firstname,lastname,birthday) values(...);");
}
}
Or you may consider DbUnit framework.
I'm using Spring Boot and Spring Integration Java DSL in my #Configuration class. One of the flows is using DelayHandler with MessageStore, by means of .delay(String groupId, String expression, Consumer endpointConfigurer):
#Bean
public IntegrationFlow errorFlow() {
return IntegrationFlows.from(errorChannel())
...
.delay(...)
...
.get();
}
I was hoping to utilize the reschedulePersistedMessages() functionality of DelayHandler, but I found out the onApplicationEvent(ContextRefreshedEvent event) which invokes it is actually never invoked (?)
I'm not sure, but I suspect this is due to the fact DelayHandler is not registered as a Bean, so registerListeners() in AbstractApplicationContext is not able to automatically register DelayHandler (and registration of non-bean listeners via ApplicationEventMulticaster.addApplicationListener(ApplicationListener listener) is not done for DelayHandler.
Currently I'm using a rather ugly workaround of registering my own listener Bean into which I inject the integration flow Bean, and then invoking the onApplicationEvent() manually after locating the DelayHandler:
#Override
public void onApplicationEvent(ContextRefreshedEvent event) {
Set<Object> integrationComponents = errorFlow.getIntegrationComponents();
for (Object component : integrationComponents) {
if (component instanceof DelayerEndpointSpec) {
Tuple2<ConsumerEndpointFactoryBean, DelayHandler> tuple2 = ((DelayerEndpointSpec) component).get();
tuple2.getT2().onApplicationEvent(event);
return;
}
}
}
Well, yes. This test-case confirm the issue:
#ContextConfiguration
#RunWith(SpringJUnit4ClassRunner.class)
#DirtiesContext
public class DelayerTests {
private static MessageGroupStore messageGroupStore = new SimpleMessageStore();
private static String GROUP_ID = "testGroup";
#BeforeClass
public static void setup() {
messageGroupStore.addMessageToGroup(GROUP_ID, new GenericMessage<>("foo"));
}
#Autowired
private PollableChannel results;
#Test
public void testDelayRescheduling() {
Message<?> receive = this.results.receive(10000);
assertNotNull(receive);
assertEquals("foo", receive.getPayload());
assertEquals(1, messageGroupStore.getMessageGroupCount());
assertEquals(0, messageGroupStore.getMessageCountForAllMessageGroups());
}
#Configuration
#EnableIntegration
public static class ContextConfiguration {
#Bean
public IntegrationFlow delayFlow() {
return flow ->
flow.delay(GROUP_ID, (String) null,
e -> e.messageStore(messageGroupStore)
.id("delayer"))
.channel(c -> c.queue("results"));
}
}
}
Here we go: https://github.com/spring-projects/spring-integration-java-dsl/issues/59.
As a workaround we can do this in our #Configuration:
#Autowired
private ApplicationEventMulticaster multicaster;
#PostConstruct
public void setup() {
this.multicaster.addApplicationListenerBean("delayer.handler");
}
Pay attention to the beanName to register. This is exactly that .id("delayer") from our flow definition plus the .handler suffix for the DelayHandler bean definition.
I'm trying to intercept the method persist and update of javax.persistence.EntityManager in a Seam 3 project.
In a previous version (Seam 2) of the micro-framework I'm trying to make, I did this using an implementation of org.hibernate.Interceptor and declaring it in the persistence.xml.
But I want something more "CDI-like" now we are in a JEE6 environment.
I want that just before entering in a EntityManager.persist call, an event #BeforeTrackablePersist is thrown. The same way, I want an event #BeforeTrackableUpdate to be thrown before entering in a EntityManager.merge call. Trackable is an interface which some of my Entitys could implement in order to be intercepted before persist or merge.
I'm using Seam 3 (3.1.0.Beta3) Extended Persistence Manager :
public class EntityManagerHandler {
#SuppressWarnings("unused")
#ExtensionManaged
#Produces
#PersistenceUnit
private EntityManagerFactory entityManagerFactory;
}
So I've made a javax.enterprise.inject.spi.Extension, and tryied many ways to do that :
public class TrackableExtension implements Extension {
#Inject #BeforeTrackablePersisted
private Event<Trackable> beforeTrackablePersistedEvent;
#Inject #BeforeTrackableMerged
private Event<Trackable> beforeTrackableMergedEvent;
#SuppressWarnings("unchecked")
public void processEntityManagerTarget(#Observes final ProcessInjectionTarget<EntityManager> event) {
final InjectionTarget<EntityManager> injectionTarget = event.getInjectionTarget();
final InjectionTarget<EntityManager> injectionTargetProxy = (InjectionTarget<EntityManager>) Proxy.newProxyInstance(event.getClass().getClassLoader(), new Class[] {InjectionTarget.class}, new InvocationHandler() {
#Override
public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
if ("produce".equals(method.getName())) {
final CreationalContext<EntityManager> ctx = (CreationalContext<EntityManager>) args[0];
final EntityManager entityManager = decorateEntityManager(injectionTarget, ctx);
return entityManager;
} else {
return method.invoke(injectionTarget, args);
}
}
});
event.setInjectionTarget(injectionTargetProxy);
}
public void processEntityManagerType(#Observes final ProcessAnnotatedType<EntityManager> event) {
final AnnotatedType<EntityManager> type = event.getAnnotatedType();
final AnnotatedTypeBuilder<EntityManager> builder = new AnnotatedTypeBuilder<EntityManager>().readFromType(type);
for (final AnnotatedMethod<? super EntityManager> method : type.getMethods()) {
final String name = method.getJavaMember().getName();
if (StringUtils.equals(name, "persist") || StringUtils.equals(name, "merge")) {
builder.addToMethod(method, TrackableInterceptorBindingLiteral.INSTANCE);
}
}
event.setAnnotatedType(builder.create());
}
public void processEntityManagerBean(#Observes final ProcessBean<EntityManager> event) {
final AnnotatedType<EntityManager> annotatedType = (AnnotatedType<EntityManager>)event.getAnnotated();
// not even called
}
public void processEntityManager(#Observes final ProcessProducer<?, EntityManager> processProducer) {
processProducer.setProducer(decorate(processProducer.getProducer()));
}
private Producer<EntityManager> decorate(final Producer<EntityManager> producer) {
return new Producer<EntityManager>() {
#Override
public EntityManager produce(final CreationalContext<EntityManager> ctx) {
return decorateEntityManager(producer, ctx);
}
#Override
public Set<InjectionPoint> getInjectionPoints() {
return producer.getInjectionPoints();
}
#Override
public void dispose(final EntityManager instance) {
producer.dispose(instance);
}
};
}
private EntityManager decorateEntityManager(final Producer<EntityManager> producer, final CreationalContext<EntityManager> ctx) {
final EntityManager entityManager = producer.produce(ctx);
return (EntityManager) Proxy.newProxyInstance(entityManager.getClass().getClassLoader(), new Class[] {EntityManager.class}, new InvocationHandler() {
#Override
public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
final String methodName = method.getName();
if (StringUtils.equals(methodName, "persist")) {
fireEventIfTrackable(beforeTrackablePersistedEvent, args[0]);
} else if (StringUtils.equals(methodName, "merge")) {
fireEventIfTrackable(beforeTrackableMergedEvent, args[0]);
}
return method.invoke(entityManager, args);
}
private void fireEventIfTrackable(final Event<Trackable> event, final Object entity) {
if (entity instanceof Trackable) {
event.fire(Reflections.<Trackable>cast(entity));
}
}
});
}
}
In all those observer methods, only the second one (processEntityManagerType(#Observes ProcessAnnotatedType<EntityManager>)) is called ! And even with that binding addition to methods persist and merge, my Interceptor is never called (I've of course enabled it with the correct lines in beans.xml, and enabled my extension with the services/javax.enterprise.inject.spi.Extension file).
Something I've thought simple with CDI seems to be actually really hard at last... or perhaps Seam 3 does something which prevent this code from executing correctly...
Does someone know how to handle that ?
I think you're making this a little harder than what it needs to be. Firstly though, JPA and CDI integration isn't very good in Java EE 6, we're very much hoping that changes in Java EE 7 and JPA 2.1.
What you'll want to do is create your own producer for the EntityManager that will delegate to an actual instance of an EntityManager, but also fire your own events when you call the methods you're interested in. Take a look at the Seam Persistence source to see one way this can be done.
As finally my little patch for Seam Persistence was applied in SEAMPERSIST-75, it will be possible in theory to do that by extending org.jboss.seam.persistence.HibernatePersistenceProvider and override the method proxyEntityManager(EntityManager).
I have a chat application that needs to store messages to DB. But connection with DB is a little bit slow, therefore it delays response to chat client.
Is it possible to persist Message entity in separate thread? What I'm actually need in: reduce delay before send-recieve message on client.
I try to do it, but it doen't work.
Dao object:
#Stateless
public class MessagesDAO {
#PersistenceContext(type= PersistenceContextType.EXTENDED)
private EntityManager entityManager;
private PersistenceThread persistenceThread = new PersistenceThread();
//another methods
public void addMessage(Message message) {
Thread thread = new Thread(persistenceThread);
persistenceThread.setMessage(message);
thread.start();
}
private class PersistenceThread implements Runnable {
private Message message;
public void setMessage(Message message) {
this.message = message;
}
public void run() {
entityManager.persist(message);
}
}
}
Interface service that calls DAO to persist new message and then return it to clients:
#Stateless
#Path("/messages")
#Produces("application/xml")
#Consumes("application/xml")
public class MessagesServiceImpl {
#EJB
private MessagesDAO messagesDAO;
#POST
#Broadcast(resumeOnBroadcast = true)
public Message postMessage(Message message) {
messagesDAO.addMessage(message);
return message;
}
#GET
#Path("/wait")
#Suspend(outputComments = false)
public Message waitForLastMessage() {
return null;
}
//another methods
}
Thanks.
Give the #Asynchronous annotation a try:
#Stateless
public class MessagesDAO {
#PersistenceContext(type = PersistenceContextType.EXTENDED)
private EntityManager entityManager;
#Asynchronous
public void addMessage(Message message) {
entityManager.persist(message);
}
}
Just bear in mind that it requires EJB 3.1.