寧靜的webservice公共構造函數未找到

Question

我想調用restful webservice使用客戶端web應用程序（簡單的客戶端請求從JSF MB）。我需要爲webservice創建一個接口，然後調用其中的方法。但是，如果我在接口使用@Path，它會給出一個錯誤 - 在Jboss部署期間找不到公共構造函數。但是如果我給實施課的@Path。它正在調用服務並且工作正常。我需要在Rest客戶端和Restful webservice impl類之間有一個Java接口。誰能幫忙？我們可以有Rest接口嗎？

客戶端：

ClientRequest request = new ClientRequest("localhost:8080/RESTfulExample/json/...../"); 
ClientResponse<String> response = request.get(String.class); 

RestInterface：

package com.nee.interfaces; 
import javax.ws.rs.Path; 
import javax.ws.rs.GET; 

@Path("/OrderManagementService") 
public interface OrderManagementServiceInterface { 
    @GET 
    @Path("/GetListOfOrders") 
    void getListOfOrders(); 
} 

IMPL：

package com.nee.implementations; 
import com.nee.interfaces.OrderManagementServiceInterface; 


public class OrderManagementServiceImpl implements OrderManagementServiceInterface { 
    public void getListOfOrders() { 
     System.out.println("am here"); 
    } 
} 

的web.xml

<?xml version="1.0" encoding="UTF-8"?> 
<web-app version="2.4" 
    xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> 
<context-param> 
    <param-name>resteasy.resources</param-name> 
    <param-value> 
     com.nee.interfaces.OrderManagementServiceInterface 
    </param-value> 
</context-param> 

<!-- this has to match with resteasy-servlet url-pattern --> 

<context-param> 
    <param-name>resteasy.servlet.mapping.prefix</param-name> 
    <param-value>/rest</param-value> 
</context-param> 

<!-- to return data according to extension --> 

<context-param> 
    <param-name>resteasy.media.type.mappings</param-name> 
    <param-value>json : application/json, xml : application/xml</param-value> 
</context-param> 

<listener> 
    <listener-class> 
     org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap 
    </listener-class> 
</listener> 

<servlet> 
    <servlet-name>resteasy-servlet</servlet-name> 
    <servlet-class> 
     org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher 
    </servlet-class> 
</servlet> 

<servlet-mapping> 
    <servlet-name>resteasy-servlet</servlet-name> 
    <url-pattern>/rest/*</url-pattern> 
</servlet-mapping> 
</web-app> 

日誌：

[org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/web]] 
(MSC service thread 1-2) Exception sending context initialized event to listener instance of class 
org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap: java.lang.RuntimeException: Unable to find a public constructor for class com.seagate.interfaces.OrderManagementServiceInterface 
at org.jboss.resteasy.plugins.server.resourcefactory.POJOResourceFactory.registered(POJOResourceFactory.java:35) [resteasy-jaxrs-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1] 
at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:120) [resteasy-jaxrs-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1] 
at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:106) [resteasy-jaxrs-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1] 
at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:83) [resteasy-jaxrs-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1] 
at org.jboss.resteasy.core.ResourceMethodRegistry.addPerRequestResource(ResourceMethodRegistry.java:72) [resteasy-jaxrs-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1] 
at org.jboss.resteasy.spi.ResteasyDeployment.registration(ResteasyDeployment.java:383) [resteasy-jaxrs-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1] 
at org.jboss.resteasy.spi.ResteasyDeployment.start(ResteasyDeployment.java:225) [resteasy-jaxrs-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1] 
at org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap.contextInitialized(ResteasyBootstrap.java:28) [resteasy-jaxrs-2.3.3.Final-redhat-1.jar:2.3.3.Final-redhat-1] 
at org.apache.catalina.core.StandardContext.contextListenerStart(StandardContext.java:3392) [jbossweb-7.0.16.Final-redhat-1.jar:] 
at org.apache.catalina.core.StandardContext.start(StandardContext.java:3850) [jbossweb-7.0.16.Final-redhat-1.jar:] 
at org.jboss.as.web.deployment.WebDeploymentService.start(WebDeploymentService.java:90) [jboss-as-web-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1] 
at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) 
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)[rt.jar:1.7.0_09] 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [rt.jar:1.7.0_09] 
at java.lang.Thread.run(Unknown Source) [rt.jar:1.7.0_09] 

Answer 1

對上述問題有一個簡單的答案。在web.xml中，而不是接口，我不得不配置IMPL類，而不是接口，並繼續在接口

<context-param> 
    <param-name>resteasy.resources</param-name> 
    <param-value> 
     com.seagate.implementations.OrderManagementServiceImpl 
    </param-value> 
</context-param> 

設置@Path和它的工作：）...

Answer 2

我猜你的錯誤是你給的接口到RestEasy的和框架試圖通過反射來創建它的一個實例。像這樣的東西永遠不會工作。您應該只將實現類指定爲參數resteasy.resources的值，而不是接口。如果你想更動態地嘗試OSGi和REST的組合。我自己並沒有在this的博客中嘗試過這個例子，但你可以看看這個例子。

UPDATE

當你想使用第三方類服務，以及，爲什麼不換另一個接口與REST Web服務和包裹接口可以在您的第三方類使用。然後，web服務僅用於將請求委託給此接口的特定實現。您可以通過Spring，Google Juice或其他的依賴注入框架注入實現。這裏是我的意思是：

你的界面，爲您實現一個抽象：

interface IExecutionService { 
    void executeStuff(); 
} 

那麼你的REST服務：

@Path("/OrderManagementService") 
class ExectionServiceDelegator { 

    private IExecutionService wrappedServiceInterface; 

    /** 
    * play around with some DI frameworks for injecting your implementation 
    */ 
    public void setIExecutionService(IExecutionService service) { 
     wrappedServiceInterface = service;  
    } 

    @GET 
    @Path("/GetListOfOrders") 
    public void doingSomething() { 
     service.executeStuff(); 
    } 
} 

您可以使用該接口IExecutionService結合特定的DI你的第三方接口也是如此。希望很清楚我想要用上面的代碼做什麼？