I have created a SpringBoot project with Jhipster. The database I am using is MongoDB.
In the application-dev.yml I have the following configuration:
data:
mongodb:
uri: mongodb://<user>:<pass>#<ip>:<port>
database: gateway
The user, password, ip Address, and port, in my application-dev are real values.
The DatabaseConfiguration.java is:
#Configuration
#EnableMongoRepositories("es.second.cdti.repository")
#Profile("!" + JHipsterConstants.SPRING_PROFILE_CLOUD)
#Import(value = MongoAutoConfiguration.class)
#EnableMongoAuditing(auditorAwareRef = "springSecurityAuditorAware")
public class DatabaseConfiguration {
private final Logger log = LoggerFactory.getLogger(DatabaseConfiguration.class);
#Bean
public ValidatingMongoEventListener validatingMongoEventListener() {
return new ValidatingMongoEventListener(validator());
}
#Bean
public LocalValidatorFactoryBean validator() {
return new LocalValidatorFactoryBean();
}
#Bean
public MongoCustomConversions customConversions() {
List<Converter<?, ?>> converters = new ArrayList<>();
converters.add(DateToZonedDateTimeConverter.INSTANCE);
converters.add(ZonedDateTimeToDateConverter.INSTANCE);
return new MongoCustomConversions(converters);
}
#Bean
public Mongobee mongobee(MongoClient mongoClient, MongoTemplate mongoTemplate, MongoProperties mongoProperties) {
log.debug("Configuring Mongobee");
Mongobee mongobee = new Mongobee(mongoClient);
mongobee.setDbName(mongoProperties.getMongoClientDatabase());
mongobee.setMongoTemplate(mongoTemplate);
// package to scan for migrations
mongobee.setChangeLogsScanPackage("es.second.cdti.config.dbmigrations");
mongobee.setEnabled(true);
return mongobee;
}}
The CloudDatabaseConfiguration is:
#Configuration
#EnableMongoRepositories("es.second.cdti.repository")
#Profile(JHipsterConstants.SPRING_PROFILE_CLOUD)
public class CloudDatabaseConfiguration extends AbstractCloudConfig {
private final Logger log = LoggerFactory.getLogger(CloudDatabaseConfiguration.class);
#Bean
public MongoDbFactory mongoFactory() {
return connectionFactory().mongoDbFactory();
}
#Bean
public LocalValidatorFactoryBean validator() {
return new LocalValidatorFactoryBean();
}
#Bean
public ValidatingMongoEventListener validatingMongoEventListener() {
return new ValidatingMongoEventListener(validator());
}
#Bean
public MongoCustomConversions customConversions() {
List<Converter<?, ?>> converterList = new ArrayList<>();
converterList.add(DateToZonedDateTimeConverter.INSTANCE);
converterList.add(ZonedDateTimeToDateConverter.INSTANCE);
converterList.add(DurationToLongConverter.INSTANCE);
return new MongoCustomConversions(converterList);
}
#Bean
public Mongobee mongobee(MongoDbFactory mongoDbFactory, MongoTemplate mongoTemplate, Cloud cloud) {
log.debug("Configuring Cloud Mongobee");
List<ServiceInfo> matchingServiceInfos = cloud.getServiceInfos(MongoDbFactory.class);
if (matchingServiceInfos.size() != 1) {
throw new CloudException("No unique service matching MongoDbFactory found. Expected 1, found "
+ matchingServiceInfos.size());
}
MongoServiceInfo info = (MongoServiceInfo) matchingServiceInfos.get(0);
Mongobee mongobee = new Mongobee(info.getUri());
mongobee.setDbName(mongoDbFactory.getDb().getName());
mongobee.setMongoTemplate(mongoTemplate);
// package to scan for migrations
mongobee.setChangeLogsScanPackage("es.second.cdti.config.dbmigrations");
mongobee.setEnabled(true);
return mongobee;
}
}
The cdtiApp.java is:
#SpringBootApplication
#EnableConfigurationProperties({ApplicationProperties.class})
public class CdtiApp implements InitializingBean{
private static final Logger log = LoggerFactory.getLogger(CdtiApp.class);
private final Environment env;
public CdtiApp(Environment env) {
this.env = env;
}
/**
* Initializes cdti.
* <p>
* Spring profiles can be configured with a program argument --spring.profiles.active=your-active-profile
* <p>
* You can find more information on how profiles work with JHipster on https://www.jhipster.tech/profiles/.
*/
#PostConstruct
public void initApplication() {
Collection<String> activeProfiles = Arrays.asList(env.getActiveProfiles());
if (activeProfiles.contains(JHipsterConstants.SPRING_PROFILE_DEVELOPMENT) && activeProfiles.contains(JHipsterConstants.SPRING_PROFILE_PRODUCTION)) {
log.error("You have misconfigured your application! It should not run " +
"with both the 'dev' and 'prod' profiles at the same time.");
}
if (activeProfiles.contains(JHipsterConstants.SPRING_PROFILE_DEVELOPMENT) && activeProfiles.contains(JHipsterConstants.SPRING_PROFILE_CLOUD)) {
log.error("You have misconfigured your application! It should not " +
"run with both the 'dev' and 'cloud' profiles at the same time.");
}
}
/**
* Main method, used to run the application.
*
* #param args the command line arguments.
*/
public static void main(String[] args) {
SpringApplication app = new SpringApplication(CdtiApp.class);
DefaultProfileUtil.addDefaultProfile(app);
Environment env = app.run(args).getEnvironment();
logApplicationStartup(env);
}
private static void logApplicationStartup(Environment env) {
String protocol = "http";
if (env.getProperty("server.ssl.key-store") != null) {
protocol = "https";
}
String serverPort = env.getProperty("server.port");
String contextPath = env.getProperty("server.servlet.context-path");
if (StringUtils.isBlank(contextPath)) {
contextPath = "/";
}
String hostAddress = "localhost";
try {
hostAddress = InetAddress.getLocalHost().getHostAddress();
} catch (UnknownHostException e) {
log.warn("The host name could not be determined, using `localhost` as fallback");
}
log.info("\n----------------------------------------------------------\n\t" +
"Application '{}' is running! Access URLs:\n\t" +
"Local: \t\t{}://localhost:{}{}\n\t" +
"External: \t{}://{}:{}{}\n\t" +
"Profile(s): \t{}\n----------------------------------------------------------",
env.getProperty("spring.application.name"),
protocol,
serverPort,
contextPath,
protocol,
hostAddress,
serverPort,
contextPath,
env.getActiveProfiles());
String configServerStatus = env.getProperty("configserver.status");
if (configServerStatus == null) {
configServerStatus = "Not found or not setup for this application";
}
log.info("\n----------------------------------------------------------\n\t" +
"Config Server: \t{}\n----------------------------------------------------------", configServerStatus);
}
#Override
public void afterPropertiesSet() throws Exception {
// TODO Auto-generated method stub
}
}
The Vehicle entity:
#org.springframework.data.mongodb.core.mapping.Document(collection = "vehicle")
public class Vehicle implements Serializable {
private static final long serialVersionUID = 1L;
#Id
private String id;
#NotNull
#Field("plate")
private String plate;
#NotNull
#Field("registrationDate")
private Instant registrationDate;
#NotNull
#Field("brand")
private String brand;
#NotNull
#Field("model")
private String model;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getPlate() {
return plate;
}
public void setPlate(String plate) {
this.plate = plate;
}
public Instant getRegistrationDate() {
return registrationDate;
}
public void setRegistrationDate(Instant registrationDate) {
this.registrationDate = registrationDate;
}
public String getBrand() {
return brand;
}
public void setBrand(String brand) {
this.brand = brand;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
}
The VehicleDTO is:
public class VehicleDTO {
private String id;
private String plate;
private Instant registrationDate;
private String brand;
private String model;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getPlate() {
return plate;
}
public void setPlate(String plate) {
this.plate = plate;
}
public Instant getRegistrationDate() {
return registrationDate;
}
public void setRegistrationDate(Instant registrationDate) {
this.registrationDate = registrationDate;
}
public String getBrand() {
return brand;
}
public void setBrand(String brand) {
this.brand = brand;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
}
The VehicleMapper is:
#Mapper(componentModel = "spring")
public interface VehicleMapper{
Vehicle toEntity(VehicleDTO source);
VehicleDTO toDto(Vehicle target);
}
The VehicleResource is:
#RestController
#RequestMapping("/api")
#CrossOrigin(origins = "*", methods = { RequestMethod.GET, RequestMethod.POST })
public class VehicleResource {
private final Logger log = LoggerFactory.getLogger(VehicleResource.class);
#Value("${jhipster.clientApp.name}")
private String applicationName;
#Autowired
private final VehicleService vehicleService;
public VehicleResource(VehicleService vehicleService) {
this.vehicleService = vehicleService;
}
#PostMapping("/vehicle")
#PreAuthorize("hasAuthority(\"" + AuthoritiesConstants.ADMIN + "\")")
public ResponseEntity<Vehicle> createVehicle(#Valid #RequestBody VehicleDTO vehicleDTO) throws URISyntaxException {
log.debug("REST request to save Vehicle : {}", vehicleDTO);
Vehicle newVehicle = vehicleService.createVehicle(vehicleDTO);
return ResponseEntity.created(new URI("/api/vehicle/" + newVehicle.getPlate()))
.headers(HeaderUtil.createAlert(applicationName, "vehicleManagement.created", newVehicle.getPlate()))
.body(newVehicle);
}
}
The VehicleService interface is:
public interface VehicleService {
Vehicle createVehicle(VehicleDTO vehicleDTO);
}
The VehicleServiceImpl is:
#Service
public class VehicleServiceImpl implements VehicleService{
#Autowired
private final VehicleRepository vehicleRepository;
#Autowired
private final VehicleMapper mapper;
public VehicleServiceImpl(VehicleRepository vehicleRepository, VehicleMapper mapper) {
this.vehicleRepository = vehicleRepository;
this.mapper = mapper;
}
private final Logger log = LoggerFactory.getLogger(VehicleServiceImpl.class);
#Override
public Vehicle createVehicle(VehicleDTO vehicleDTO) {
Vehicle vehicle = vehicleRepository.save(mapper.toEntity(vehicleDTO));
log.debug("Created Information for vehicle: {}", vehicle);
return vehicle;
}
}
The VehicleRepository interface is:
/**
* Spring Data MongoDB repository for the {#link Vehicle} entity.
*/
#Repository
public interface VehicleRepository extends MongoRepository<Vehicle, String> {
}
From the Swagger console I access the Vehicle-Resource:
Swagger console
Click on the button and write in the text box the json with the vehicle data:
enter JSON data
As we can see in the following image, the answer is 201. Initially the vehicle was saved with the identifier "id": "60e740935ed5a10e2c2ed19e".
Send request
I access the database to check that the vehicle has been correctly stored in the vehicle table. To my surprise ... there is no vehicle in the vehicle table:
show database
I can make sure that the data in the database application-dev is OK. I don't have any other databases.
I suspect that transactions with the database are not actually being made. This data is somehow stored in memory because if I do a findAllVehicles from Swagger it does return the vehicle.
I have a eureka server running (jhipster-registry) and two microservices that synchronize with it. The Gateway, which acts as a reverse proxy and the Vehiculos microservice. The Swagger console is the gateway, from where I make the request to insert vehicles. Everything seems to work, but as I say in bbdd does not save anything.
Related
Hi Experts,
I am working on a multi-tenant project. It's a table per tenant architecture.
We are using spring and JPA (eclipse-link) for this purpose.
Here our use case is when ever a new customer subscribes to our application a new data base would be created for the customer.
As spring configuration would be loaded only during start-up how to load this new db configuration at run time?
Could some one please give some pointers?
Thanks in advance.
BR,
kitty
For multitenan, first you need to create MultitenantConfig.java
like below file.
here tenants.get("Musa") is my tenant name, comes from application.properties file
#Configuration
#EnableConfigurationProperties(MultitenantProperties.class)
public class MultiTenantConfig extends WebMvcConfigurerAdapter {
/** The Constant log. */
private static final Logger log = LoggerFactory.getLogger(MultiTenantConfig.class);
/** The multitenant config. */
#Autowired
private MultitenantProperties multitenantConfig;
#Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new MultiTenancyInterceptor());
}
/**
* Data source.
*
* #return the data source
*/
#Bean
public DataSource dataSource() {
Map<Object, Object> tenants = getTenants();
MultitenantDataSource multitenantDataSource = new MultitenantDataSource();
multitenantDataSource.setDefaultTargetDataSource(tenants.get("Musa"));
multitenantDataSource.setTargetDataSources(tenants);
// Call this to finalize the initialization of the data source.
multitenantDataSource.afterPropertiesSet();
return multitenantDataSource;
}
/**
* Gets the tenants.
*
* #return the tenants
*/
private Map<Object, Object> getTenants() {
Map<Object, Object> resolvedDataSources = new HashMap<>();
for (Tenant tenant : multitenantConfig.getTenants()) {
DataSourceBuilder dataSourceBuilder = new DataSourceBuilder(this.getClass().getClassLoader());
dataSourceBuilder.driverClassName(tenant.getDriverClassName()).url(tenant.getUrl())
.username(tenant.getUsername()).password(tenant.getPassword());
DataSource datasource = dataSourceBuilder.build();
for (String prop : tenant.getTomcat().keySet()) {
try {
BeanUtils.setProperty(datasource, prop, tenant.getTomcat().get(prop));
} catch (IllegalAccessException | InvocationTargetException e) {
log.error("Could not set property " + prop + " on datasource " + datasource);
}
}
log.info(datasource.toString());
resolvedDataSources.put(tenant.getName(), datasource);
}
return resolvedDataSources;
}
}
public class MultitenantDataSource extends AbstractRoutingDataSource {
#Override
protected Object determineCurrentLookupKey() {
return TenantContext.getCurrentTenant();
}
}
public class MultiTenancyInterceptor extends HandlerInterceptorAdapter {
#Override
public boolean preHandle(HttpServletRequest req, HttpServletResponse res, Object handler) {
TenantContext.setCurrentTenant("Musa");
return true;
}
}
#ConfigurationProperties(prefix = "multitenancy")
public class MultitenantProperties {
public static final String CURRENT_TENANT_IDENTIFIER = "tenantId";
public static final int CURRENT_TENANT_SCOPE = 0;
private List<Tenant> tenants;
public List<Tenant> getTenants() {
return tenants;
}
public void setTenants(List<Tenant> tenants) {
this.tenants = tenants;
}
}
public class Tenant {
private String name;
private String url;
private String driverClassName;
private String username;
private String password;
private Map<String,String> tomcat;
//setter gettter
public class TenantContext {
private static ThreadLocal<Object> currentTenant = new ThreadLocal<>();
public static void setCurrentTenant(Object tenant) {
currentTenant.set(tenant);
}
public static Object getCurrentTenant() {
return currentTenant.get();
}
}
add below properties in application.properties
multitenancy.tenants[0].name=Musa
multitenancy.tenants[0].url<url>
multitenancy.tenants[0].username=<username>
multitenancy.tenants[0].password=<password>
multitenancy.tenants[0].driver-class-name=<driverclass>
I am trying to make a simple Spring Boot application generated with jHipster to get from a postgresql a list of articles from a postreSQL database and display it using a rest controller, but when i run it i get
***************************
APPLICATION FAILED TO START
***************************
Description:
Parameter 0 of constructor in org.adi.security.DomainUserDetailsService required a bean named 'entityManagerFactory' that could not be found.
Action:
Consider defining a bean named 'entityManagerFactory' in your configuration.
But the thing is that that `DomainUserDetailsService is something generated by jhipster which stopped working after i added my classes. So i will write below my classes:
Article Entity:
package org.adi.domain;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="articles")
public class Article implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column(name="article_id")
private int articleId;
#Column(name="title")
private String title;
#Column(name="category")
private String category;
public int getArticleId() {
return articleId;
}
public void setArticleId(int articleId) {
this.articleId = articleId;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
}
ArticleDAO (Repository):
#Transactional
#Repository
public class ArticleDAO implements IArticleDAO {
#PersistenceContext
private EntityManager entityManager;
#Override
public Article getArticleById(int articleId) {
return entityManager.find(Article.class, articleId);
}
#SuppressWarnings("unchecked")
#Override
public List<Article> getAllArticles() {
String hql = "FROM Article as atcl ORDER BY atcl.articleId DESC";
return (List<Article>) entityManager.createQuery(hql).getResultList();
}
#Override
public void createArticle(Article article) {
entityManager.persist(article);
}
#Override
public void updateArticle(Article article) {
Article artcl = getArticleById(article.getArticleId());
artcl.setTitle(article.getTitle());
artcl.setCategory(article.getCategory());
entityManager.flush();
}
#Override
public void deleteArticle(int articleId) {
entityManager.remove(getArticleById(articleId));
}
#Override
public boolean articleExists(String title, String category) {
String hql = "FROM Article as atcl WHERE atcl.title = ? and atcl.category = ?";
int count = entityManager.createQuery(hql).setParameter(1, title)
.setParameter(2, category).getResultList().size();
return count > 0 ? true : false;
}
}
ArticleService:
#Service
public class ArticleService implements IArticleService {
#Autowired
private IArticleDAO articleDAO;
#Override
public Article getArticleById(int articleId) {
Article obj = articleDAO.getArticleById(articleId);
return obj;
}
#Override
public List<Article> getAllArticles(){
return articleDAO.getAllArticles();
}
#Override
public synchronized boolean createArticle(Article article){
if (articleDAO.articleExists(article.getTitle(), article.getCategory())) {
return false;
} else {
articleDAO.createArticle(article);
return true;
}
}
#Override
public void updateArticle(Article article) {
articleDAO.updateArticle(article);
}
#Override
public void deleteArticle(int articleId) {
articleDAO.deleteArticle(articleId);
}
}
and finally my REST controller:
#Controller
#RequestMapping("user")
#CrossOrigin(origins = {"http://localhost:4200"})
public class ArticleController {
#Autowired
private IArticleService articleService;
#GetMapping("article")
public ResponseEntity<Article> getArticleById(#RequestParam("id") String id) {
Article article = articleService.getArticleById(Integer.parseInt(id));
return new ResponseEntity<Article>(article, HttpStatus.OK);
}
#GetMapping("all-articles")
public ResponseEntity<List<Article>> getAllArticles() {
List<Article> list = articleService.getAllArticles();
return new ResponseEntity<List<Article>>(list, HttpStatus.OK);
}
#PostMapping("article")
public ResponseEntity<Void> createArticle(#RequestBody Article article, UriComponentsBuilder builder) {
boolean flag = articleService.createArticle(article);
if (flag == false) {
return new ResponseEntity<Void>(HttpStatus.CONFLICT);
}
HttpHeaders headers = new HttpHeaders();
headers.setLocation(builder.path("/article?id={id}").buildAndExpand(article.getArticleId()).toUri());
return new ResponseEntity<Void>(headers, HttpStatus.CREATED);
}
#PutMapping("article")
public ResponseEntity<Article> updateArticle(#RequestBody Article article) {
articleService.updateArticle(article);
return new ResponseEntity<Article>(article, HttpStatus.OK);
}
#DeleteMapping("article")
public ResponseEntity<Void> deleteArticle(#RequestParam("id") String id) {
articleService.deleteArticle(Integer.parseInt(id));
return new ResponseEntity<Void>(HttpStatus.NO_CONTENT);
}
}
Did you create a Persistence Unit?
[Reference]=> https://docs.oracle.com/cd/E19798-01/821-1841/bnbrj/index.html
Once you already have the persistence-unit's tag defined you are able to create your entity manager like this:
private final String PERSISTENCE_UNIT_NAME = "PUName";
private EntityManagerFactory eMFactory = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME);
EntityManager entityManager=eMFactory.createEntityManager();
i trie to run the following code.
But the child is not created to the parent Entity 'Erfasser'.
If i comment out the line erfasser.getErfasst().add(neu) everything works fine.
#PostConstruct
public void init() {
Erfasser erfasser = new Erfasser();
erfasser.setEmail("benjamin.koubik#auditweb.de");
erfasser.setPasswort("counting88");
gesamtAnzahl.einfuegenErfasser(erfasser);
Erfasst neu = new Erfasst();
neu.setDatum(new Date());
neu.setJuristische(1);
neu.setNatuerliche(0);
gesamtAnzahl.einfuegen(neu);
erfasser.getErfasst().add(neu);
gesamtAnzahl.update(erfasser);
}
Only the Erfasser itself is stored correctly in the DB.
#Entity
public class Erfasser implements Serializable {
private static final long serialVersionUID = 1L;
public Erfasser() {
super();
}
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int erfasser_id;
#Column(length = 50)
#Email(message = "Inkorrekt EMail")
private String email;
#Column(length = 30)
private String passwort;
#OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
#JoinColumn(referencedColumnName = "erfasser_id", name = "erfasst_id_referenz")
private List<Erfasst> erfasst;
public int getErfasser_id() {
return erfasser_id;
}
public void setErfasser_id(int erfasser_id) {
this.erfasser_id = erfasser_id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPasswort() {
return passwort;
}
public void setPasswort(String passwort) {
this.passwort = passwort;
}
public List<Erfasst> getErfasst() {
return erfasst;
}
public void setErfasst(List<Erfasst> erfasst) {
this.erfasst = erfasst;
}
}
And here my SessionBeans:
AnzahlErfasstGesamtLocal.java
#Local
public interface AnzahlErfasstGesamtLocal {
public abstract List<Integer> gesamt();
public abstract List<Erfasst> gesamtNatuerlich();
public abstract List<Erfasst> gesamtJuristisch();
public abstract void einfuegenErfasser(Erfasser e);
public abstract void einfuegen(Erfasst e);
public abstract void update(Erfasser e);
public abstract void loeschen(Erfasst e);
}
AnzahlErfasstGesamt.java
#Stateless
#LocalBean
public class AnzahlErfasstGesamt implements AnzahlErfasstGesamtLocal {
#PersistenceContext
private EntityManager em;
public AnzahlErfasstGesamt() {
}
#Override
public List<Integer> gesamt() {
return null;
}
#Override
public List<Erfasst> gesamtNatuerlich() {
try {
TypedQuery<Erfasst> q = em.createQuery(
"SELECT COUNT(e) FROM Erfasst e WHERE e.natuerliche = 1 AND e.juristische = 0; ", Erfasst.class);
List<Erfasst> liste = q.getResultList();
if (!liste.isEmpty()) {
return liste;
} else {
return null;
}
} catch (NoResultException e) {
return null;
}
}
#Override
public List<Erfasst> gesamtJuristisch() {
try {
TypedQuery<Erfasst> q = em.createQuery(
"SELECT COUNT(e) FROM Erfasst e WHERE e.juristische = 1 AND e.natuerliche = 0; ", Erfasst.class);
List<Erfasst> liste = q.getResultList();
if (!liste.isEmpty()) {
return liste;
} else {
return null;
}
} catch (NoResultException e) {
return null;
}
}
#Override
public void einfuegen(Erfasst e) {
em.persist(e);
}
#Override
public void update(Erfasser e) {
em.merge(e);
}
#Override
public void loeschen(Erfasst e) {
em.remove(em.merge(e));
}
#Override
public void einfuegenErfasser(Erfasser e) {
em.persist(e);
}
}
There is nothing wrong with JPA - something is wrong in external code (and certainly with your description of the problem). For example I don't see where the actual erfasst list is created - if nothing happens in einfuegenErfasser (whatever that means), then you will get a NullPointerException while trying to add an element to a null list. Is that what happens?
The problem is the combination of JPA entity setup and the code using it. The JPA entity Erfasser has CascadeType.ALL, therefore the gesamtAnzahl.update(erfasser); updates the child entities erfasst with it. At the same time you do not setup the erfasser reference on the neu instance. You need to do something alog the line neu.setErfasser(erfasser) before gesamtAnzahl.update(erfasser);.
On separated line of concern, using the native German naming drives my head crazy, even though I am more German then English speaker.
I'm trying to add HATEOAS links to a JSON resource served by a Spring REST controller.
I see I should use a resource assembler as described at https://github.com/spring-projects/spring-hateoas
The example displays a Person class and a PersonResource class.
I understand the PersonResource class is defined as:
public class PersonResource extends ResourceSupport {
}
What is then the Person class ? Is it a data domain class ?
In my case, I have defined an Admin class that is a REST domain class, and I specified it as having resource support:
public class Admin extends ResourceSupport {
private String firstname;
private String lastname;
private String email;
private String login;
private String password;
private String passwordSalt;
public Admin() {
}
public String getFirstname() {
return this.firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return this.lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getLogin() {
return this.login;
}
public void setLogin(String login) {
this.login = login;
}
public String getPassword() {
return this.password;
}
public void setPassword(String password) {
this.password = password;
}
public String getPasswordSalt() {
return passwordSalt;
}
public void setPasswordSalt(String passwordSalt) {
this.passwordSalt = passwordSalt;
}
public EventAdmin toEventAdmin() {
EventAdmin eventAdmin = new EventAdmin();
BeanUtils.copyProperties(this, eventAdmin);
return eventAdmin;
}
public static Admin fromEventAdmin(EventAdmin eventAdmin) {
Admin admin = new Admin();
BeanUtils.copyProperties(eventAdmin, admin);
return admin;
}
}
My REST controller sees only this Admin class as it is a REST domain class. It does not know, and should not know, of anything data domain class.
So I wonder how to use the resource assembler support here.
I don't understand why I should have an additional data domain Admin class here.
kind Regards,
Following Mike's answer here is how my controller now looks like:
#RequestMapping(method = RequestMethod.POST, produces = "application/json; charset=utf-8")
#ResponseBody
public ResponseEntity<Admin> add(#RequestBody Admin admin, UriComponentsBuilder builder) {
AdminCreatedEvent adminCreatedEvent = adminService.add(new CreateAdminEvent(admin.toEventAdmin()));
HttpHeaders responseHeaders = new HttpHeaders();
responseHeaders.add("Content-Type", "application/json; charset=utf-8");
responseHeaders.setLocation(builder.path("/admin/{id}").buildAndExpand(adminCreatedEvent.getAdminId()).toUri());
Admin createdAdmin = adminResourceAssembler.toResource(adminCreatedEvent.getEventAdmin());
ResponseEntity<Admin> responseEntity = new ResponseEntity<Admin>(createdAdmin, responseHeaders, HttpStatus.CREATED);
return responseEntity;
}
Before, instead of using the resource assembler I was doing a:
Admin createdAdmin = Admin.fromEventAdmin(adminCreatedEvent.getEventAdmin());
createdAdmin.add(linkTo(methodOn(AdminController.class).add(createdAdmin, builder)).withSelfRel());
But it was not giving me the resource id in the url.
Your ResourceAssembler implementation needs to know about both the data domain class and the REST domain class, because its job is to convert the former to the latter.
If you want to keep knowledge of your data classes out of your controller, you could make a resource conversion service which would retrieve the data from the repo and use a ResourceAssembler to turn it into resources that the controller can know about.
#Component
public class AdminResourceAssembler extends ResourceAssemblerSupport<Admin, AdminResource> {
public AdminResourceAssembler() {
super(AdminController.class, AdminResource.class);
}
public AdminResource toResource(Admin admin) {
AdminResource adminResource = createResourceWithId(admin.getId(), admin); // adds a "self" link
// TODO: copy properties from admin to adminResource
return adminResource;
}
}
#Service
public class AdminResourceService {
#Inject private AdminRepository adminRepository;
#Inject private AdminResourceAssembler adminResourceAssembler;
#Transactional
public AdminResource findOne(Long adminId) {
Admin admin = adminRepository.findOne(adminId);
AdminResource adminResource = adminResourceAssembler.toResource(admin);
return adminResource;
}
}
#Controller
#RequestMapping("/admins")
public class AdminController {
#Inject private AdminResourceService adminResourceService;
#RequestMapping(value="/{adminId}", method=RequestMethod.GET)
public HttpEntity<AdminResource> findOne(#PathVariable("adminId") Long adminId) {
AdminResource adminResource = adminResourceService.findOne(adminId);
return new ReponseEntity<>(adminResource, HttpStatus.OK);
}
}
I have problem with using EntityManager persist() method.
I am using JSF2.0, glassfish 3, JPA and hibernate, i am not using spring.
I try to add events in an events table with the method persist, but EntityManager persist() method does not insert record to database and i have this error message =>
SEVERE: javax.persistence.TransactionRequiredException
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.doTxRequiredCheck(EntityManagerWrapper.java:163)
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.flush(EntityManagerWrapper.java:411)
at dao.EvenementDao.addEvenement(EvenementDao.java:128).
#ManagedBean
#Stateless
public class EvenementDao implements Serializable{
/**
*
*/
private static final long serialVersionUID = -3343483942392617877L;
/**
*
*/
private List<TEvenement> listeEvenement;
private List<SelectItem> listeSelectItemEvnt;
private TEvenement tevenement ;
public EvenementDao() {
}
#PersistenceUnit(unitName="GA2010-ejbPU-dev")
private EntityManagerFactory emf;
#PostConstruct
private void init() {
tevenement = new TEvenement();
}
public List<TEvenement> getListeEvenement() {
EntityManager em = emf.createEntityManager();
TypedQuery<TEvenement> requete = m.createNamedQuery("TEvenement.findPrivateOther",
TEvenement.class);
listeEvenement = requete.getResultList();
return listeEvenement;
}
public TEvenement getEvenement() {
return tevenement;
}
public void setEvenement(TEvenement evenement) {
this.tevenement = evenement;
}
public void addEvenement(){
EntityManager em = emf.createEntityManager();
HttpSession session = (HttpSession) FacesContext.getCurrentInstance().
getExternalContext().getSession(false);
Integer codeUser = (Integer) session.getAttribute("codeUser");
tevenement.setUtilCreation(codeUser);
System.out.println("je rentre dans addevenemnt");
try{
System.out.println("i persist "+ em);
em.persist(tevenement);
em.flush();
System.out.println(tevenement.getDetailsEvenement());
FacesMessage message = new FacesMessage("Evenement ajouté avec succès.");
FacesContext.getCurrentInstance().addMessage(null, message);
}catch(Exception e){
e.printStackTrace();
}
}
}
So, this is not working, but the progam enter in the fonction addEvenement , FacesMessage message = new FacesMessage("Evenement ajouté avec succès."); returns me the message as if it was working.
i thouht it was due to my entityMAnager but in fact an ohter function works fine with the same Entity manager so i dont understand.
**public List<TEvenement> getListeEvenement()** {
EntityManager em = emf.createEntityManager();
TypedQuery<TEvenement> requete = em.createNamedQuery("TEvenement.findPrivateOther", TEvenement.class);
listeEvenement = requete.getResultList();
return listeEvenement;
}
this one works fine, the only difference is that in this case the query is a select and in the other case it's a persist so a query that impact the database.
the code of the entity :
#Entity
#Table(name="t_evenements")
#NamedQueries({#NamedQuery(name="TEvenement.findAll", query="SELECT evnt FROM TEvenement evnt"),
#NamedQuery(name="TEvenement.findPrivateOther", query="SELECT evnt FROM TEvenement evnt WHERE evnt.typeEvenement = 6 OR evnt.typeEvenement = 7")})
public class TEvenement implements Serializable {
private static final long serialVersionUID = -1908959833491896991L;
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name="REF_EVENEMENT", unique=true, nullable=false)
private Integer refEvenement;
#Temporal(TemporalType.DATE)
#Column(name="DATE_DEBUT_EVENEMENT")
private Date dateDebutEvenement;
#Temporal(TemporalType.DATE)
#Column(name="DATE_FIN_EVENEMENT")
private Date dateFinEvenement;
#Column(name="DETAILS_EVENEMENT")
private String detailsEvenement;
#Column(name="IS_EVERYDAY")
private byte isEveryday;
#Column(name="RAPPEL_EVENEMENT")
private int rappelEvenement;
public Integer getUtilEvenement() {
return utilEvenement;
}
public void setUtilEvenement(Integer utilEvenement) {
this.utilEvenement = utilEvenement;
}
#Column(name="TITRE_EVENEMENT")
private String titreEvenement;
#Column(name="TYPE_EVENEMENT")
private String typeEvenement;
#Column(name="UTIL_COPIE_EVENEMENT")
private Integer utilCopieEvenement;
#Column(name="UTIL_EVENEMENT")
private Integer utilEvenement;
#Column(name="HEURE_EVENEMENT")
private String heureEvenement;
#Column(name="UTIL_CREATION")
private Integer utilCreation;
public String getHeureEvenement() {
return heureEvenement;
}
public void setHeureEvenement(String heureEvenement) {
this.heureEvenement = heureEvenement;
}
public TEvenement() {
}
public Integer getRefEvenement() {
return this.refEvenement;
}
public void setRefEvenement(int refEvenement) {
this.refEvenement = refEvenement;
}
public Date getDateDebutEvenement() {
return this.dateDebutEvenement;
}
public Integer getUtilCreation() {
return utilCreation;
}
public void setUtilCreation(Integer utilCreation) {
this.utilCreation = utilCreation;
}
public void setUtilCopieEvenement(Integer utilCopieEvenement) {
this.utilCopieEvenement = utilCopieEvenement;
}
public void setDateDebutEvenement(Date dateDebutEvenement) {
this.dateDebutEvenement = dateDebutEvenement;
}
public Date getDateFinEvenement() {
return this.dateFinEvenement;
}
public void setDateFinEvenement(Date dateFinEvenement) {
this.dateFinEvenement = dateFinEvenement;
}
public String getDetailsEvenement() {
return this.detailsEvenement;
}
public void setDetailsEvenement(String detailsEvenement) {
this.detailsEvenement = detailsEvenement;
}
public byte getIsEveryday() {
return this.isEveryday;
}
public void setIsEveryday(byte isEveryday) {
this.isEveryday = isEveryday;
}
public int getRappelEvenement() {
return this.rappelEvenement;
}
public void setRappelEvenement(int rappelEvenement) {
this.rappelEvenement = rappelEvenement;
}
public String getTitreEvenement() {
return this.titreEvenement;
}
public void setTitreEvenement(String titreEvenement) {
this.titreEvenement = titreEvenement;
}
public String getTypeEvenement() {
return this.typeEvenement;
}
public void setTypeEvenement(String typeEvenement) {
this.typeEvenement = typeEvenement;
}
public Integer getUtilCopieEvenement() {
return this.utilCopieEvenement;
}
public void setUtilCopieEvenement(int utilCopieEvenement) {
this.utilCopieEvenement = utilCopieEvenement;
}
}
Do anyone have a idea what am i missing?
The difference isn't that you call persist, the difference is that you call em.flush() which as the error states, requires the EntityManager be joined to a transaction. Makes sure your getListeEvenement() method is wrapped in a transaction, or start one depending on your setup.