Eclipse cannot see beyond Beans' models' fields from AbstractBean/AbstractEntity in Facelets - eclipse

I am running jee-2019-06 version of Eclipse. Here is my Model-Bean-Facade structure:
I am not including getters/setters for brevity.
My Identifiable:
/** Identifiable interface for Entities; used for DAO - Service transitions. */
public interface Identifiable<T extends Serializable> extends Serializable {
public T getId(); // identifiable field
public String getTitle(); // user friendly name (maybe different from actual entity's name)
public String getName(); // every entity has a name
public String getDescription(); // every entity should have a description
}
My Abstract Bean:
public abstract class AbstractBean<T extends Identifiable<?>> {
protected final transient Logger log = Logger.getLogger(this.getClass());
private final Class<T> clazz;
private T model;
public AbstractBean(final Class<T> clazz) {
this.clazz = clazz;
}
protected T createInstance() {
try {
return this.clazz.newInstance();
} catch (InstantiationException | IllegalAccessException e) {
this.log.error("[" + this.getClass().getSimpleName() + ".createInstance()] : Error : {} {}", e.getMessage(), e);
return null;
}
}
protected AbstractFacade<T> getFacade() {
return null;
}
}
My Abstract Facade:
#Transactional
public abstract class AbstractFacade<T extends Identifiable<?>> {
protected final transient Logger log = Logger.getLogger(this.getClass());
protected final Class<T> clazz;
public AbstractFacade(final Class<T> clazz) {
this.clazz = clazz;
}
}
My Bean:
#Named
#ViewScoped
public class CarBean extends AbstractBean<Car> {
#Inject
private CarFacade facade;
public CarBean(){
super(Car.class);
}
#Override
public CarFacade getFacade() {
return this.facade;
}
}
My AbstractEntity:
#MappedSuperclass
public abstract class AbstractEntity implements Identifiable<Integer> {
private Integer id;
private String name;
private String description;
public AbstractEntity() {
}
}
My Entity:
public class Car extends AbstractEntity {
public Car() {
}
}
I have no problems in showing the value to the user.
I have problems in validation and hyperlink in Eclipse:
<h:outputText value="#{carBean.model.name}" />
Facelet validator cannot validate name of model. It yellow underlines name. Also, I cannot Ctrl + click to activate hyperlink on name.
I saw on another developer's eclipse that both of my problems were not issues at all. I compared all the tools installed in both Eclipses and could not find anything relevant.
My question: what tools do I have to install or what settings/adjustments am I missing?
Please note: I do not want to disable the validator and I want to be able to hyperlink fields in facelet so that I will access the field using Ctrl + click.
Thank you.

Related

Dynamic injection using #SpringBean in wicket

I have a form that based on collected information generates a report. I have multiple sources from which to generate reports, but the form for them is the same. I tried to implement strategy pattern using an interface implementing report generator services, but that led to wicket complaining about serialization issues of various parts of the report generator. I would like to solve this without duplicating the code contained in the form, but I have not been able to find information on dynamic injection with #SpringBean.
Here is a rough mock up of what I have
public class ReportForm extends Panel {
private IReportGenerator reportGenerator;
public ReportForm(String id, IReportGenerator reportGenerator) {
super(id);
this.reportGenerator = reportGenerator;
final Form<Void> form = new Form<Void>("form");
this.add(form);
...
form.add(new AjaxButton("button1") {
private static final long serialVersionUID = 1L;
#Override
protected void onSubmit(AjaxRequestTarget target)
{
byte[] report = reportGenerator.getReport(...);
...
}
});
}
}
If I do it this way, wicket tries to serialize the concrete instance of reportGenerator. If I annotate the reportGenerator property with #SpringBean I receive Concrete bean could not be received from the application context for class: IReportGenerator
Edit: I have reworked implementations of IRerportGenerator to be able to annotate them with #Component and now I when I use #SpringBean annotation I get More than one bean of type [IReportGenerator] found, you have to specify the name of the bean (#SpringBean(name="foo")) or (#Named("foo") if using #javax.inject classes) in order to resolve this conflict. Which is exactly what I don't want to do.
I think the behavior you're trying to achieve can be done with a slight workaround, by introducing a Spring bean that holds all IReportGenerator instances:
#Component
public class ReportGeneratorHolder {
private final List<IReportGenerator> reportGenerators;
#Autowired
public ReportGeneratorHolder(List<IReportGenerator> reportGenerators) {
this.reportGenerators = reportGenerators;
}
public Optional<IReportGenerator> getReportGenerator(Class<? extends IReportGenerator> reportGeneratorClass) {
return reportGenerators.stream()
.filter(reportGeneratorClass::isAssignableFrom)
.findAny();
}
}
You can then inject this class into your Wicket page, and pass the desired class as a constructor-parameter. Depending on your Spring configuration you might need to introduce an interface for this as well.
public class ReportForm extends Panel {
#SpringBean
private ReportGeneratorHolder reportGeneratorHolder;
public ReportForm(String id, Class<? extends IReportGenerator> reportGeneratorClass) {
super(id);
IReportGenerator reportGenerator = reportGeneratorHolder
.getReportGenerator(reportGeneratorClass)
.orElseThrow(IllegalStateException::new);
// Form logic omitted for brevity
}
}
As far as I am able to find, looking through documentation and even the source for wicket #SpringBean annotation, this isn't possible. The closest I got is with explicitly creating a proxy for a Spring bean based on class passed. As described in 13.2.4 Using proxies from the wicket-spring project chapter in Wicket in Action.
public class ReportForm extends Panel {
private IReportGenerator reportGenerator;
private Class<? extends IReportGenerator> classType;
private static ISpringContextLocator CTX_LOCATOR = new ISpringContextLocator() {
public ApplicationContext getSpringContext() {
return ((MyApplication)MyApplication.get()).getApplicationContext();
}
};
public ReportForm(String id, Class<? extends IReportGenerator> classType) {
super(id);
this.classType = classType;
final Form<Void> form = new Form<Void>("form");
this.add(form);
...
form.add(new AjaxButton("button1") {
private static final long serialVersionUID = 1L;
#Override
protected void onSubmit(AjaxRequestTarget target)
{
byte[] report = getReportGenerator().getReport(...);
...
}
});
}
private <T> T createProxy(Class<T> classType) {
return (T) LazyInitProxyFactory.createProxy(classType, new
SpringBeanLocator(classType, CTX_LOCATOR));
}
private IReportGenerator getReportGenerator() {
if (reportGenerator = null) {
reportGenerator = createProxy(classType);
}
return reportGenerator;
}
}

#TransactionalEventListener annotated method not invoked in #Transactional test

I'm trying to implement domain event publishing from an entity by following the examples mentioned on the post below:
Example for #DomainEvents and #AfterDomainEventsPublication
However I haven't managed to have Spring calling my method annotated with #TransactionalEventListener.
See below the entity, service, event listener and test code:
#Entity
public class Book extends AbstractAggregateRoot<Book>
{
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
#Column(unique = true)
private String isbn;
#Column
private String name;
public Book(String isbn, String name)
{
this.isbn = isbn;
this.name = name;
}
public void purchase()
{
registerEvent(new BookPurchasedEvent(id));
}
// getters omitted for brevity
}
Service:
#Service
#Transactional
public class BookService
{
private final BookRepository bookRepository;
public BookService(BookRepository bookRepository)
{
this.bookRepository = bookRepository;
}
public void purchaseBook(Integer bookId)
{
Book book = bookRepository.findById(bookId)
.orElseThrow(NoSuchElementException::new);
book.purchase();
bookRepository.save(book);
}
}
Listener:
#Service
public class EventListener
{
private final Logger logger = LoggerFactory.getLogger(this.getClass());
#TransactionalEventListener
public void handleEvent(BookPurchasedEvent event)
{
logger.info("Received event {}", event);
}
}
Test:
#RunWith(SpringRunner.class)
#SpringBootTest
#Transactional
public class BookEventsTest
{
#Autowired
private BookService bookService;
#Autowired
private EntityManager entityManager;
#Test
public void test()
{
Book book = new Book("abcd-efgh", "El Quijote");
book = entityManager.merge(book);
bookService.purchaseBook(book.getId());
}
}
The log message from the listener is not logged. It works though when deployed as a REST service and invoked e.g. via Postman
Got it. Since my test is annotated with #Transactional, the transaction wrapping the test method will be rolled back. Therefore the method annotated with #TransactionalEventListener won't be called, since by default it triggers at the phase TransactionPhase.AFTER_COMMIT (and I'm not interested in having it called unless the transaction is successful). So the working version of the test looks as follows:
#RunWith(SpringRunner.class)
#SpringBootTest
public class BookEventsTest
{
#Autowired
private BookService bookService;
#Autowired
private BookRepository bookRepository;
#MockBean
private EventListener eventListener;
private Book book;
#Before
public void init() {
book = bookRepository.save(new Book("abcd-efgh", "El Quijote"));
}
#After
public void clean() {
bookRepository.deleteAll();
}
#Test
public void testService()
{
bookService.purchaseBook(book.getId());
then(eventListener)
.should()
.handleEvent(any(BookPurchasedEvent.class));
}
}

Spring Boot store data with WebSockets

I have a simple WebSocket set up and try to save data. Somehow the data gets not persisted. I don't get any error messages and the object gets returned correct to the client. If I try to store the object with a REST controller and a REST request it works.
Here are the dependencies of my build.gradle file:
dependencies {
compile 'org.springframework.boot:spring-boot-starter-web'
compile 'org.springframework.boot:spring-boot-starter-data-jpa'
compile 'org.springframework.boot:spring-boot-starter-websocket'
compile 'org.springframework:spring-messaging'
compile 'com.google.code.gson:gson:1.7.2'
compile 'org.postgresql:postgresql:9.4-1200-jdbc41'
compile 'commons-dbcp:commons-dbcp:1.4'
testCompile('org.springframework.boot:spring-boot-startet-test')
}
PersonController
#Controller
public class PersonController {
#Autowired
PersonRepository personRepository;
#MessageMapping("/test")
#SendTo("/response/test")
public Person test() throws Exception {
Person person = new Person();
person.setName("John Doe");
return personRepository.save(person);
}
}
Configuration for STOMP messaging
#Configuration
#EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {
#Override
public void configureMessageBroker(MessageBrokerRegistry config) {
config.enableSimpleBroker("/response");
config.setApplicationDestinationPrefixes("/app");
}
#Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/websocket")
.setAllowedOrigins("*")
.withSockJS();
}
Person entity
#Entity
public class Person {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long id;
private String name;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return getName;
}
public void setName(String name) {
this.name = name;
}
}
Base Repository
#NoRepositoryBean
public interface BaseRepository<T, ID extends Serializable> extends Repository<T, ID> {
void delete(T deleted);
void delete(ID id);
Iterable<T> findAll();
T findOne(ID id);
T save(T persisted);
Iterable<T> save(Iterable<T> persited);
}
Person Repository
public interface PersonRepository extends
BaseRepository<Person, Serializable> {
}
Is there a problem in my code?
Is there an issue with caching? Do I have to force flushing?
Is storing data with WebSockets supported by SpringBoot?
Do you know any examples with storing data? I could only find basic examples without storing data.
The problem was in my persistence configuration. I changed the configuration from a Java implementation to the application.properties file. I think there was a problem with my transaction manager.
To be complete, here is my current application.properties file:
spring.datasource.url = jdbc:postgresql://localhost:5432/test
spring.datasource.username = test
spring.datasource.password = test
spring.datasource.testWhileIdle = true
spring.datasource.validationQuery = SELECT 1
spring.jpa.show-sql = true
spring.jpa.hibernate.ddl-auto = create
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect

How to inject objects of custom classes (in eclipse e4) into an Handler class (defined for a menu item in Application's XMI file)

I'm new to Eclipse e4 and I am trying to inject an object of my custom class into a Handler class like below :
public class MenuHandler {
#Inject
Test2 user;
#Execute
public void execute(MApplication app, EPartService partService, EModelService modelService) {
System.out.println(user.getUserName()); // DefaultUser
user.setUserName("anotherUser");
System.out.println(user.getUserName()); //anotherUser
}
}
#Creatable
public class Test2 {
private String userName = "DefaultUser";
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
}
Having this code and If I launch my RCP application, and upon clicking the menu item (defined in the 'Application.e4xmi' file) my handler class ('MenuHandler') is not getting executed. Whereas if I remove the #Inject annotation from the handler class (i.e.., upon removing #Inject Test2 user; ) then the handler class is getting executed without any issues.
I think some problem exists if I have the annotation "#Inject" inside the Handler class.
Any suggestion will be greatly appreciated !
Maybe you should try to create and inject your custom object in the LifeCycleManager of your e4 application.
public class LifeCycleManager {
#PostContextCreate
public void postContextCreate(IEclipseContext context) {
final MCustomContext customContext = PersistenceUtils.load(MCustomContext.class);
context.set(MCustomContext.class, customContext);
}
}
This works fine for me.

gwt rpc serialize generic class

I need to pass a class object through the gwt rpc connection as a generic but it seems that rpc does not cooperate with it. The class is serialized using the java.io.Serializable. I have checked it using the gwt IsSerializable but i still have the error.
Here is my code
MySource.java
#SuppressWarnings("serial")
#PersistenceCapable
#Inheritance(strategy = InheritanceStrategy.SUBCLASS_TABLE)
public abstract class MySource implements Serializable {
#PrimaryKey
#Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Long id;
#Persistent
private String userId;
#Persistent
private String title;
#Persistent
private String description;
#Persistent
private String blobKey;
#Persistent
private String youtubeLink;
#Persistent
private String personalLink;
#Persistent
private Date submitedDate;
#Persistent
private float price;
public float getPrice() {
return price;
}
public void setPrice(float price) {
this.price = price;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getBlobKey() {
return blobKey;
}
public void setBlobKey(String blobKey) {
this.blobKey = blobKey;
}
public String getYoutubeLink() {
return youtubeLink;
}
public void setYoutubeLink(String youtubeLink) {
this.youtubeLink = youtubeLink;
}
public String getPersonalLink() {
return personalLink;
}
public void setPersonalLink(String personalLink) {
this.personalLink = personalLink;
}
public Date getSubmitedDate() {
return submitedDate;
}
public void setSubmitedDate(Date submitedDate) {
this.submitedDate = submitedDate;
}
public Long getId() {
return id;
}
}
AndroidSource.java
#SuppressWarnings("serial")
#PersistenceCapable
public class AndroidSource extends MySource{
public AndroidSource() {
super();
}
}
CategoryBrowseService.java which is the remoteservice model
#RemoteServiceRelativePath("categoryService")
public interface CategoryBrowseService extends RemoteService{
ArrayList<MySource> getSourceList(Class<? extends MySource> classType);
}
CategoryBrowseServiceAsync.java
public interface CategoryBrowseServiceAsync {
void getSourceList(Class<? extends MySource> classType,
AsyncCallback<ArrayList<MySource>> callback);
}
CategoryBrowsePresenter.java where the rpc is called
private void retrieveSources(Class<? extends MySource> classType) {
CategoryBrowseServiceAsync rpcService = GWT.create(CategoryBrowseService.class);
rpcService.getSourceList(classType, new AsyncCallback<ArrayList<MySource>>() {
#Override
public void onFailure(Throwable caught) {
Window.alert("Ooops!!!Sorry!Something went wrong.I am still beta!");
}
#Override
public void onSuccess(ArrayList<MySource> result) {
sourceList = result;
display.setSourceContent(sourceList);
}
});
}
CategoryBrowseServiceImpl.java
#SuppressWarnings("serial")
public class CategoryBrowseServiceImpl extends RemoteServiceServlet implements CategoryBrowseService{
private SourceDatastore dataStore;
public CategoryBrowseServiceImpl() {
dataStore = new SourceDatastore();
}
#Override
public ArrayList<MySource> getSourceList(Class<? extends MySource> classType) {
return dataStore.getSources(classType);
}
}
Here is the error that i get.
Compiling module com.sourcebay.SourceBay
Scanning for additional dependencies: file:/home/santaris/workspace/SourceBay/src/com/sourcebay/client/presenter/mybay/browse/CategoryBrowsePresenter.java
Computing all possible rebind results for 'com.sourcebay.client.model.mybay.browse.CategoryBrowseService'
Rebinding com.sourcebay.client.model.mybay.browse.CategoryBrowseService
Invoking generator com.google.gwt.user.rebind.rpc.ServiceInterfaceProxyGenerator
Generating client proxy for remote service interface 'com.sourcebay.client.model.mybay.browse.CategoryBrowseService'
[ERROR] java.lang.Class<T> is not assignable to 'com.google.gwt.user.client.rpc.IsSerializable' or 'java.io.Serializable' nor does it have a custom field serializer (reached via java.lang.Class<? extends com.sourcebay.shared.source.MySource>)
[ERROR] java.lang.Class<T> has no available instantiable subtypes. (reached via java.lang.Class<? extends com.sourcebay.shared.source.MySource>)
[ERROR] subtype java.lang.Class<T> is not assignable to 'com.google.gwt.user.client.rpc.IsSerializable' or 'java.io.Serializable' nor does it have a custom field serializer (reached via java.lang.Class<? extends com.sourcebay.shared.source.MySource>)
[ERROR] Errors in 'file:/home/santaris/workspace/SourceBay/src/com/sourcebay/client/presenter/mybay/browse/CategoryBrowsePresenter.java'
[ERROR] Line 75: Failed to resolve 'com.sourcebay.client.model.mybay.browse.CategoryBrowseService' via deferred binding
The paradox is that when i am running my application through the eclipse plugin everything works fine. Could anyone help me please? I have checked to fix the problem through the DTO solution without any success. Moreover i have tried to implement a CustomFieldSerializer as Google suggests without any success too.
Thanks in advance,
Stefanos Antaris
P.S. Sorry for the huge post :-)
Well the problem is that you trying to transport a Class object over the network. I have no idea why it is working in dev mode (I've tried it on local project and it failed), but it shouldn't work. You have to use something else instead of Class name for example String, which will contain a name of class. Theoretically it can work if you create CustomFieldSerializer for Class, but using String instead of Class will be easier.
Classes with persistence annotations can work well on the server side, but if you want to pass its data to the client you must create a plain java serializable class to transport data from server to client.
As noted in the previous answer, persistence annotations are not supported in the client side, as they cannot be translated to equivalent javascript code (and it makes sense since the client doesn't have the responsability of persistence).
It could be that the persistence-related annotations in MySource.java make it implossible to translate to javascript. Try removing the annotations to see if it's related. Also make sure that MySource.java is in a package declared as translatable in the module xml file ("source" element).
Try using implements Serializable for defining you class.
I mean like this:
public class AndroidSource extends MySource implements Serializable{
public AndroidSource() {
super();
}
}
Your RPC Services must deal just with Serializable Objects. Domain classes are not translatable to JavaScript So GWT can't send and receive via network (RPC Protocole) such objects. You need to create DTO classes (wich shadows domain class) implementing java.io.Serializable and then reconfigure all your RPC Service to use in input DTOs and output DTOs. Good Luck for your project.