Question

我正在 Mule Flow 中执行 groovy脚本。
使用版本 Mule Server 3.5.1.EE .. 我已经在classpath

中包含了groovy-all.jar

Groovy脚本内容很简单

return "demo payload"

执行时，我得到异常堆栈跟踪

java.lang.NullPointerException
    at org.mule.component.AbstractComponent.invokeInternal(AbstractComponent.java:108)
    at org.mule.component.AbstractComponent.process(AbstractComponent.java:152)
    at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:24)
    at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:58)

如果我需要发布更多细节，请告诉我任何帮助将不胜感激。

Answer 1

我不确定你是否做得对，但在Mule流程中正确使用Groovy看起来像：

<?xml version="1.0" encoding="UTF-8"?>
<mule ...>
    <flow name="lab1Flow1" doc:name="lab1Flow1">
        <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8081" doc:name="HTTP"/>
        <scripting:component doc:name="Groovy">
            <scripting:script engine="Groovy"><![CDATA["demo payload"]]></scripting:script>
        </scripting:component>
    </flow>
</mule>

如果您使用curl尝试上面的流程，它应该响应（按预期）：

$ curl -i http://localhost:8081
HTTP/1.1 200 OK
Date: Sun, 07 Dec 2014 16:52:48 +0000
Server: Mule EE Core Extensions/3.5.2
X-MULE_SESSION: ...
X-MULE_ENCODING: UTF-8
Content-Type: text/plain
Content-Length: 12
Connection: close

demo payload

Answer 2

<?xml version="1.0" encoding="UTF-8"?>

<mule xmlns:scripting="http://www.mulesoft.org/schema/mule/scripting" xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
    xmlns:spring="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd
http://www.mulesoft.org/schema/mule/scripting http://www.mulesoft.org/schema/mule/scripting/current/mule-scripting.xsd">
    <http:listener-config name="HTTP_Listener_Configuration" host="0.0.0.0" port="8081" doc:name="HTTP Listener Configuration"/>
    <flow name="groovydemoFlow">
        <http:listener config-ref="HTTP_Listener_Configuration" path="/" doc:name="HTTP"/>
        <scripting:component doc:name="Groovy">
            <scripting:script engine="Groovy"><![CDATA[println('demo payload');]]></scripting:script>
        </scripting:component>
    </flow>
</mule>

Please  try this

Mule流中的Groovy Script无法正常工作

2 个答案: