Not only in DAO design pattern but in other design patterns also use of INTERFACE is bit confusing. Interfaces is one of the best used concepts in Java. Let me explain this with an example: Say you designed a GPS device for car which looks into the map and automatically turns the car to the … Read more
Solution is SpringBeanAutowiringSupport if you are using Spring Framework 2.5+. public class DesignSerializer extends JsonSerializer<Design> { @Autowired IDesignService designService; } public DesignSerializer(){ SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this); } … } I Hope that help you
With JPA 2.2, you no longer need to use converter it added support for the mapping of the following java.time types: java.time.LocalDate java.time.LocalTime java.time.LocalDateTime java.time.OffsetTime java.time.OffsetDateTime @Column(columnDefinition = “DATE”) private LocalDate date; @Column(columnDefinition = “TIMESTAMP”) private LocalDateTime dateTime; @Column(columnDefinition = “TIME”) private LocalTime localTime;
Yes it is possible if the annotation has @Inherited added to it. For example, the @Transactional annotation has @Inherited. From the docs: Indicates that an annotation type is automatically inherited. If an Inherited meta-annotation is present on an annotation type declaration, and the user queries the annotation type on a class declaration, and the class … Read more
You can use @PropertySource to read options from application.properties or other property file you want. Please look PropertySource usage example and working example of usage spring-redis-cache. Or look at this small sample: @Configuration @PropertySource(“application.properties”) public class SpringSessionRedisConfiguration { @Value(“${redis.hostname}”) private String redisHostName; @Value(“${redis.port}”) private int redisPort; @Bean public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() { return new PropertySourcesPlaceholderConfigurer(); … Read more
First of all, let me highlight that status codes are meant to indicate the result of the sever’s attempt to understand and satisfy the client’s request. If everything goes well, then I return 200 and the image id. Seems to be fine, but I would advise you to return 201 along with a Location header … Read more
The config server is needed during bootstrap, and that’s where the parent property sources come from. It looks like all you need to do is move your spring.cloud.config.enabled property to bootstrap.yml (or .properties).
Spring provides a special DataSource that allows you to do this: SingleConnectionDataSource Changing your code to this should do the trick: SingleConnectionDataSource dataSource = new SingleConnectionDataSource(); …. // The rest stays as is For use in multi-threaded applications, you can make the code re-entrant by borrowing a new connection from the pool and wrapping it … Read more
And add a method to the repository: List<LoginProjection> findAllProjectedBy(); The method name can be simplified to findBy() to match the documentation example at https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#projections
You’ll have to have a ContextLoaderListener in your web.xml – It loads your configuration files. <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> You need to understand the difference between Web application context and root application context . In the web MVC framework, each DispatcherServlet has its own WebApplicationContext, which inherits all the beans already defined in the root WebApplicationContext. … Read more