java - 我对这种骡子 Jersey 流程做错了什么？

Question

我正在尝试创建一个简单的 Mule 流，用于提取 header 并将 user-agent 传递给 REST 组件，该组件根据提取的用户代理返回状态代码。

这是我的骡子流程

  <flow name="restflowFlow1" doc:name="restflowFlow1">
        <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="9595" path="rest" doc:name="HTTP"/>
        <jersey:resources doc:name="REST">
            <component class="com.test.RestClass"/>
        </jersey:resources>
    </flow>

这是对应的类

@Path("restClass")
public class RestClass implements Callable {

    public Response getExample(String toBeValidated)
    {

        if(toBeValidated.contains("Apple"))
        {
            return Response.status(Status.OK).entity("hello " + toBeValidated).build();
        }
        return Response.status(Status.UNAUTHORIZED).entity("hello " + toBeValidated).build();
    }

    @Override
    public Object onCall(MuleEventContext eventContext) throws Exception {
        String requiredHeader= eventContext.getMessage().getProperty("user-agent", PropertyScope.INBOUND);

        return getExample(requiredHeader);
    }
}

当我尝试运行上述流程时，出现以下错误:

ERROR 2014-11-21 13:49:47,909 [[muletestproject].connector.http.mule.default.receiver.02] org.mule.exception.DefaultMessagingExceptionStrategy: 
********************************************************************************
Message               : Failed to invoke JerseyResourcesComponent{restflowFlow1.component.418586223}. Component that caused exception is: JerseyResourcesComponent{restflowFlow1.component.418586223}. Message payload is of type: String
Code                  : MULE_ERROR--2
--------------------------------------------------------------------------------
Exception stack is:
1. String index out of range: -1 (java.lang.StringIndexOutOfBoundsException)
  java.lang.String:1875 (null)
2. Failed to invoke JerseyResourcesComponent{restflowFlow1.component.418586223}. Component that caused exception is: JerseyResourcesComponent{restflowFlow1.component.418586223}. Message payload is of type: String (org.mule.component.ComponentException)
  org.mule.component.AbstractComponent:144 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/component/ComponentException.html)
--------------------------------------------------------------------------------
Root Exception stack trace:
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
    at java.lang.String.substring(String.java:1875)

附注我对骡子很陌生。所以我也对任何其他优雅的方法持开放态度。

Answer 1

要实现可调用对 Jerse 来说很有意义，您应该使用 JAX-RS 注释，即:

package org.mule.transport.jersey;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.PathParam;

@Path("/helloworld")
public class HelloWorldResource {

    @GET
    @Produces("text/plain")
    @Path("/{name}")
    public String sayHelloWithUri(@PathParam("name") String name) {
        return "Hello " + name;
    }
}

如上所述here .