JBOSS 7.1.0 错误 - 找不到类 org.jboss.resteasy.core.AsynchronousDispatcher 的公共构造函数

Question

我正在尝试将基于 Spring MVC 的 REST 应用程序迁移到 Jboss 7.1.0。在启动时，Jboss 初始化显示一切都已正确启动，所有 war 文件都已成功部署。

我在集成 Spring MVN 和 Jboss 的 RestEasy 服务时遇到了很多问题，我想知道这是否是 jboss resteasy 与 Spring MVN 之间的另一个冲突。

当我向 REST 服务发出请求时，我收到以下错误：

12:52:31,541 INFO  [org.springframework.web.context.ContextLoader] (MSC service thread 1-5) Root WebApplicationContext: initialization completed in 3035 ms
12:52:31,845 INFO  [org.jboss.web] (MSC service thread 1-5) JBAS018210: Registering web context: /MyRestService
12:52:31,875 INFO  [org.jboss.as] (MSC service thread 1-5) JBAS015874: JBoss AS 7.1.0.Final "Thunder" started in 53526ms - Started 390 of 468 services (72 services are passive or on-demand)
12:52:32,034 INFO  [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS018559: Deployed "MyRestService.war"
12:54:10,117 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/MyRestService]] (http--127.0.0.1-8080-1) StandardWrapper.Throwable: java.lang.RuntimeException: Unable to find a public constructor for class org.jboss.resteasy.core.AsynchronousDispatcher
        at org.jboss.resteasy.plugins.server.resourcefactory.POJOResourceFactory.registered(POJOResourceFactory.java:35) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:121) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:107) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:84) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.core.ResourceMethodRegistry.addPerRequestResource(ResourceMethodRegistry.java:73) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.spi.ResteasyDeployment.registration(ResteasyDeployment.java:367) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.spi.ResteasyDeployment.start(ResteasyDeployment.java:225) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.init(ServletContainerDispatcher.java:67) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.init(HttpServletDispatcher.java:36) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1202) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:952) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:188) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.10.Final.jar:]
        at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.1.0.Final.jar:7.1.0.Final]
        at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:154) [jboss-as-web-7.1.0.Final.jar:7.1.0.Final]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.10.Final.jar:]
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.10.Final.jar:]
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) [jbossweb-7.0.10.Final.jar:]
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.10.Final.jar:]
        at java.lang.Thread.run(Thread.java:619) [rt.jar:1.6.0_07]

12:54:10,194 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/MyRestService].[javax.ws.rs.core.Application]] (http--127.0.0.1-8080-1) Allocate exception for servlet javax.ws.rs.core.Application: java.lang.RuntimeException: Unable to find a public constructor for class org.jboss.resteasy.core.AsynchronousDispatcher
        at org.jboss.resteasy.plugins.server.resourcefactory.POJOResourceFactory.registered(POJOResourceFactory.java:35) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:121) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:107) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:84) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.core.ResourceMethodRegistry.addPerRequestResource(ResourceMethodRegistry.java:73) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.spi.ResteasyDeployment.registration(ResteasyDeployment.java:367) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.spi.ResteasyDeployment.start(ResteasyDeployment.java:225) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.init(ServletContainerDispatcher.java:67) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.init(HttpServletDispatcher.java:36) [resteasy-jaxrs-2.3.1.GA.jar:]
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1202) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:952) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:188) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.10.Final.jar:]
        at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.1.0.Final.jar:7.1.0.Final]
        at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:154) [jboss-as-web-7.1.0.Final.jar:7.1.0.Final]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.10.Final.jar:]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.10.Final.jar:]
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.10.Final.jar:]
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) [jbossweb-7.0.10.Final.jar:]
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.10.Final.jar:]
        at java.lang.Thread.run(Thread.java:619) [rt.jar:1.6.0_07]

这个错误没有任何意义，我唯一能认出的是 RESTEasy 服务 servlet 名称。配置如下 - 在 Jboss 7.0.2 中运行良好

<servlet-mapping>
        <servlet-name>javax.ws.rs.core.Application</servlet-name>
        <url-pattern>/rest/*</url-pattern>
</servlet-mapping>  

Answer 1

我通过以下步骤解决了这个问题：

第 1 步。创建您的服务注册类

public class RESTApplication extends javax.ws.rs.core.Application {

private Set<Object> singletons = new HashSet<Object>();

public RESTApplication () {
    singletons.add(new RestService());
}

@Override
public Set<Object> getSingletons() {
    return singletons;
}

}

第 2 步：编辑您的 web.xml

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

<servlet>
    <servlet-name>resteasy-servlet</servlet-name>
    <servlet-class>
        org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher
            </servlet-class>
    <init-param>
        <param-name>javax.ws.rs.Application</param-name>
        <param-value>yourpackage.RESTApplication</param-value>
    </init-param>
</servlet>

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

Answer 2

在 JBoss 7.1.1（没有 Spring）上使用 RESTEasy 时，我也看到了这个异常。它是这样包装的：

Allocate exception for servlet [project class reference]: java.lang.RuntimeException: Unable to find a public constructor for class org.jboss.resteasy.core.AsynchronousDispatcher

解决方案是从战争中排除所有 RESTEasy 罐子。在 Maven 中，您可以通过确保使用 Maven 的“提供”范围声明任何必需的 RESTEasy 依赖项来做到这一点，因为这些是由 JBoss 提供的，并且排除任何传递性 RESTEasy 依赖项（参见this link 示例）。您可以通过切换到包含 pom.xml 的目录并发出以下命令来检查您是否有任何 RESTEasy 依赖项：

mvn dependency:tree | grep "resteasy"

如果您使用 web.xml 来激活 JAX-RS，您可能还需要切换到演示的基于类的方法 in the RESTEasy docs。 RESTEasy 开发人员here 和here 提到了针对此问题的这些解决方案。

Answer 3

问题不在于声明 RESTful 服务的方式，这种方式对于 JAX-RS 1.1 来说是相当标准的（与 Servlet James 无关！！），但这是 JBoss 中的一个错误，您需要在里面指定 RESTful 资源Application 子类，否则它将尝试将 AsyncDisp*** 作为 RESTful 服务挂载。

Answer 4

我远非 REST 专家，但 javax.ws.rs.core.Application 不是 servlet。