Spring Data MongoDB - Spring Web Services - Parent - SpringSource

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please define productname in your docbook file!4.4 Spring Data extensionsThis section documents a set of Spring Data extensions that enable Spring Data usage in a variety ofcontexts. Currently most of the integration is targeted towards Spring MVC.Web supportNoteThis section contains the documentation for the Spring Data web support as it is implementedas of Spring Data Commons in the 1.6 range. As it the newly introduced support changes quitea lot of things we kept the documentation of the former behavior in the section called “Legacyweb support”.Also note that the JavaConfig support introduced in Spring Data Commons 1.6 requires Spring3.2 due to some issues with JavaConfig and overridden methods in Spring 3.1.Spring Data modules ships with a variety of web support if the module supports the repositoryprogramming model. The web related stuff requires Spring MVC JARs on the classpath, some of themeven provide integration with Spring HATEOAS.3 In general, the integration support is enabled by using the @EnableSpringDataWebSupportannotation in your JavaConfig configuration class.@Configuration@EnableWebMvc@EnableSpringDataWebSupportclass WebConfiguration { }Example 4.18 Enabling Spring Data web supportThe @EnableSpringDataWebSupport annotation registers a few components we will discuss in a bit.It will also detect Spring HATEOAS on the classpath and register integration components for it as wellif present.Alternatively, if you are using XML configuration, register either SpringDataWebSupport orHateoasAwareSpringDataWebSupport as Spring beans:Example 4.19 Enabling Spring Data web support in XMLBasic web supportThe configuration setup shown above will register a few basic components:• A DomainClassConverter to enable Spring MVC to resolve instances of repository manageddomain classes from request parameters or path variables.• HandlerMethodArgumentResolver implementations to let Spring MVC resolve Pageable andSort instances from request parameters.3 Spring HATEOAS - https://github.com/SpringSource/spring-hateoas1.4.0.BUILD-SNAPSHOTSpring Data MongoDB -Reference Documentation 15
please define productname in your docbook file!DomainClassConverterThe DomainClassConverter allows you to use domain types in your Spring MVC controller methodsignatures directly, so that you don't have to manually lookup the instances via the repository:@Controller@RequestMapping("/users")public class UserController {@RequestMapping("/{id}")public String showUserForm(@PathVariable("id") User user, Model model) {}}model.addAttribute("user", user);return "userForm";Example 4.20 A Spring MVC controller using domain types in method signaturesAs you can see the method receives a User instance directly and no further lookup is necessary. Theinstance can be resolved by letting Spring MVC convert the path variable into the id type of the domainclass first and eventually access the instance through calling findOne(…) on the repository instanceregistered for the domain type.NoteCurrently the repository has to implement CrudRepository to be eligible to be discovered forconversion.HandlerMethodArgumentResolvers for Pageable and SortThe configuration snippet above also registers a PageableHandlerMethodArgumentResolveras well as an instance of SortHandlerMethodArgumentResolver. The registration enablesPageable and Sort being valid controller method arguments@Controller@RequestMapping("/users")public class UserController {@Autowired UserRepository repository;@RequestMappingpublic String showUsers(Model model, Pageable pageable) {}}model.addAttribute("users", repository.findAll(pageable));return "users";Example 4.21 Using Pageable as controller method argumentThis method signature will cause Spring MVC try to derive a Pageable instance from the requestparameters using the following default configuration:Table 4.1. Request parameters evaluated for Pageable instancespagesizePage you want to retrieve.Size of the page you want to retrieve.1.4.0.BUILD-SNAPSHOTSpring Data MongoDB -Reference Documentation 16
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