这个mule -jersey流程我做错了什么?

时间:2014-11-21 21:59:35

标签: java jersey mule mule-component

我正在尝试创建一个简单的mule流,它提取标头并将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

  <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>

这是相应的类

@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,我收到以下错误:

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)

P.S。我是骡子的新手。所以我也对任何其他优雅方法持开放态度。

2 个答案:

答案 0 :(得分:0)

对于Jersey来说,实现回调没有多大意义,你应该使用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

答案 1 :(得分:0)

在java组件中实现Callable为它提供了一个从流xml中调用的功能。在您的情况下,Callable不需要使用JAX-RS注释来注释您的服务类,以便jersey可以在您的类中发布公共方法。当您发布地址类似于服务类路径的请求时,jersey将自动调用相应的方法。

import javax.ws.rs.Path;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

@Path("restClass")
public class RestClass {
public Response getExample(@QueryParam("param1") String param1) {
     return Response.status(Status.OK).entity("hello " + param1).build();
  }
}

这应该适合你。