Question

我试图让JSR-311 plugin使用Grails 2.3.7。我使用版本0.10，因为我认为0.11需要Grails 2.4。

我已使用generate-resource命令为我的域类Product创建终点。创建了两个资源类ProductCollectionResource和ProductResource。我稍微调整了一下，但基本上它们看起来像这样：

ProductCollectionResource

@Path('/api/products')
@Consumes(['application/json'])
@Produces(['application/json'])
class ProductCollectionResource {

    def productResourceService

    @Path('{id}')
    @GET
    ProductResource getResource(@PathParam('id') Long id) {
        new ProductResource(productResourceService: productResourceService, id:id)
    }

    @GET
    Response readAll(@QueryParam("max") Integer max, @QueryParam("offset") Integer offset) {
        ok productResourceService.readAll(max, offset)
    }
}

ProductResource

@Consumes(['application/json'])
@Produces(['application/json'])
class ProductResource {

    def productResourceService
    def id

    @GET
    Response read() {
        ok productResourceService.read(id)
    }
}

readAll中的ProductCollectionResource方法运行正常 - 当我点击它时，我会返回产品列表，但是当我尝试按ID访问特定产品时（/api/products/123 ），我收到以下错误：

Caused by MessageException: A message body writer for Java class com.myapp.ProductResource, and Java type class com.myapp.ProductResource, and MIME media type application/json was not found
->>  285 | write              in com.sun.jersey.spi.container.ContainerResponse
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|   1479 | _handleRequest     in com.sun.jersey.server.impl.application.WebApplicationImpl
|   1391 | handleRequest . .  in     ''
|   1381 | handleRequest      in     ''
|    416 | service . . . . .  in com.sun.jersey.spi.container.servlet.WebComponent
|    538 | service            in com.sun.jersey.spi.container.servlet.ServletContainer
|    716 | service . . . . .  in     ''
|    193 | process            in org.grails.jaxrs.web.JaxrsContext$JaxrsServiceImpl
|     45 | handle . . . . . . in org.grails.jaxrs.JaxrsController
|    195 | doFilter           in grails.plugin.cache.web.filter.PageFragmentCachingFilter
|     63 | doFilter . . . . . in grails.plugin.cache.web.filter.AbstractFilter
|    150 | invoke             in net.bull.javamelody.JspWrapper
|    285 | invoke . . . . . . in net.bull.javamelody.JdbcWrapper$DelegatingInvocationHandler
|    198 | doFilter           in net.bull.javamelody.MonitoringFilter
|    176 | doFilter . . . . . in     ''
|     67 | doFilter . . . . . in     ''
|     53 | doFilter           in grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter
|     82 | doFilter           in grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter
|     63 | doFilter . . . . . in com.odobo.grails.plugin.springsecurity.rest.RestLogoutFilter
|     46 | doFilterInternal   in org.grails.jaxrs.web.JaxrsFilter
|     82 | doFilter . . . . . in com.brandseye.cors.CorsFilter
|   1145 | runWorker          in java.util.concurrent.ThreadPoolExecutor
|    615 | run . . . . . . .  in java.util.concurrent.ThreadPoolExecutor$Worker
^    744 | run                in java.lang.Thread

所以看起来它试图将我的ProductResource课程编组为JSON，我认为这并不是我想要的。我认为它应该调用ProductResource.read()方法，并将该方法返回的值编组为JSON。

Answer 1

我没有任何Grails的经验，但从纯粹的泽西观点来看，看看你在这里得到了什么

@Path('{id}')
@GET
ProductResource getResource(@PathParam('id') Long id) {

这是资源方法（端点）。因此，ProductsResource将被视为响应主体，就像任何其他资源方法一样。

您似乎正在尝试使用子资源定位器功能，转发到ProductsResource类。为此，子资源定位器（getResource）不应具有@HttpMethod注释。这是区分资源方法和子资源定位器的因素之一。

所以只需从@GET方法中删除getResource即可。 @GET已经通过read()中的ProductsResource方法建立了<!DOCTYPE html> ... var color = new Array('#FFF8DC', '#DC143C', '#00FFFF', '#00008B', '#008B8B', '#B8860B', '#A9A9A9', '#006400', '#BDB76B', '#8B008B'); function mark(n0) { do { n = Math.floor(Math.random()*11)%10 } while n == n0; return n; } if(window.DeviceMotionEvent) { var speed = 15; var x = y = z = x0 = y0 = z0 = n0 = 0; window.addEventListener('motionListener', function(){ var acceleration =event.accelerationIncludingGravity; x = acceleration.x; y = acceleration.y; n = mark(n0) if(Math.abs(x-x0) > speed || Math.abs(y-y0) > speed) { document.body.style.backgroundColor = color[n]; } x0 = x; y0 = y; n0 = n; }, false); } ..，这将被称为。

有关详细信息，请参阅Sub-Resource Locators

泽西岛子资源定位器错误

1 个答案: