Question

首先，感谢你们所做的出色工作。我在您的网站上花费的时间越来越多，这是我的第一个帮助请求。

我正在评估mule esb。我试图迭代一个json数组，根据例如属性＆＃34; activity＆＃34;来调度到不同的队列。

{
"activitylist":[
    {
        "activity": {
                "serviceConsumer":"channelrecord",
                "project":"5004channel 500448319610 type=",
                "activity":"Transcodage",
                "serviceProvider":"Internal"
        }
    },
    {
        "activity":{
                "serviceConsumer":"channelrecord",
                "project":"5004channel 500448319610 type=",
                "activity":"Doublage",
                "serviceProvider":"DubbingBroz"
        }
    }
]

}

我写了一个简单的测试流来捕获json msg并尝试使用foreach：

<http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8082" doc:name="activity/delegate/savelist" path="activity/delegate/savelist"/>
    <foreach  doc:name="For Each" collection="#[payload.activitylist]"> 
         <logger message="#[payload.serviceConsumer]" level="INFO" doc:name="Logger"/>
    </foreach>

但没有运气。我收到了这些错误：

ERROR 2014-06-12 17:40:34,723 [[verto].connector.http.mule.default.receiver.02] org.mule.exception.DefaultMessagingExceptionStrategy:********************************************************************************
Message               : Execution of the expression "payload.activitylist" failed. (org.mule.api.expression.ExpressionRuntimeException). Message payload is of type: ContentLengthInputStream
Code                  : MULE_ERROR--2 --------------------------------------------------------------------------------
Exception stack is:
1. [Error: could not access: activitylist; in class: org.apache.commons.httpclient.ContentLengthInputStream] [Near : {... payload.activitylist ....}]
[Line: 1, Column: 1] (org.mvel2.PropertyAccessException) org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer:690 (null)
2. Execution of the expression "payload.activitylist" failed (org.mule.api.expression.ExpressionRuntimeException) org.mule.el.mvel.MVELExpressionLanguage:213 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/api/expression/ExpressionRuntimeException.html)
3. Execution of the expression "payload.activitylist" failed (org.mule.api.expression.ExpressionRuntimeException). Message payload is of type: ContentLengthInputStream (org.mule.api.MessagingException) org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor:35 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/api/MessagingException.html)--------------------------------------------------------------------------------

任何帮助我优雅地发送这些东西的建议都将非常感激。

Answer 1

在http:inbound-endpoint和forEach之间添加以下内容：

<json:json-to-object-transformer returnClass="java.lang.Object" />

Answer 2

使用拆分器组件作为替代方案，并使用json路径到json字符串，

＆＃13;

<splitter expression="#[json:activitylist]" doc:name="Splitter"/>
 
<logger message="Activity #[json:activity/serviceConsumer]" level="INFO" doc:name="Logger"/>

＆＃13;

mule如何迭代json请求

2 个答案: