在Mule esb中使用具有多个参数的Web服务方法 [英] Consume a web service method with multiple args in Mule esb
问题描述
您好，我想应用的内容看起来很简单，但我不知道如何，需要澄清一下. 这是场景: 我想调用一个Web服务方法，此方法的名称为find()并接受一个对象作为参数，该对象表示一个组合的主键，由两个字符串组成，一个id和一个类型. 肥皂中的主键表示形式的对象是:
Hello what I want to apply seems very simple but I don't know how, need some clarifications. here is the scenario: I want to call a web service method, this method name is find() and accept as argument an object, the object represent a composed primary key, composed by two strings an id and a type. the object -which is the primary key- representation in soap is :
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsd="http://wsdouane/">
<soapenv:Header/>
<soapenv:Body>
<wsd:find>
<entity>
<id>string_1</id>
<type>string_2</type>
</entity>
</wsd:find>
</soapenv:Body>
</soapenv:Envelope>
我的第一个想法是从http发布请求中读取两个args(id和type)，以使用java转换器创建所需的主键对象，该转换器调用主键类构造函数，然后将创建的对象传递给soap组件基于该对象创建soap请求，然后使用http组件调用Web服务，最后将响应写入文件中. 这就是结果流:
my first idea was about reading the two args (the id and the type)from an http post request to create the wanted primary key object with a java transformer which call the primary key class constructor , then pass the created object to a soap component to creat the soap request based on the object, then call the web service with an http component and finally write the response into a file. this the resulting flow:
<flow name="testObjetFlow1" doc:name="testObjetFlow1">
<http:inbound-endpoint exchange-pattern="one-way" host="localhost" port="8088" doc:name="HTTP"/>
<custom-transformer class="com.test.transformer.HttpRequestToPrimaryKeyObject" doc:name="PK Object Transformer"/>
<cxf:jaxws-client operation="find" serviceClass="douane.Douane" port="douanePort" doc:name="SOAP"/>
<http:outbound-endpoint exchange-pattern="request-response" method="POST" address="http://localhost:8080/ClientsDB/douane" doc:name="douaneWS"/>
<mulexml:object-to-xml-transformer doc:name="Object to XML"/>
<file:outbound-endpoint path="C:\MuleStudio\SandBox\output" outputPattern="#[function:datestamp:dd-MM-yy]_#[function:systime].xml " responseTimeout="10000" doc:name="Outgoing File"/>
</flow>
我的自定义转换器
package com.test.transformer;
import org.mule.api.MuleMessage;
import org.mule.api.transformer.TransformerException;
import org.mule.transformer.AbstractMessageTransformer;
import douane.DouanePK;
public class HttpRequestToPrimaryKeyObject extends AbstractMessageTransformer {
@Override
//DouanePK represent the primary key entity
public DouanePK transformMessage(MuleMessage message, String outputEncoding)
throws TransformerException {
// TODO Auto-generated method stub
String id = message.getInboundProperty("id");
String type = message.getInboundProperty("type");
DouanePK primKey = new DouanePK();
dp.setId(id);
dp.setType(type);
return primKey;
}
}
我在运行项目时收到错误消息
when I run the project I get the error
ERROR 2013-05-16 09:44:13,191 [[mediation_mod].testObjetFlow1.stage1.03] org.mule.exception.DefaultMessagingExceptionStrategy:
********************************************************************************
Message : Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject() : Cannot marshal the XStream instance in action
---- Debugging information ----
-------------------------------
message : Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject()
cause-exception : com.thoughtworks.xstream.converters.ConversionException
cause-message : Cannot marshal the XStream instance in action
------------------------------- (com.thoughtworks.xstream.converters.ConversionException). Message payload is of type: byte[]
Code : MULE_ERROR--2
--------------------------------------------------------------------------------
Exception stack is:
1. Cannot marshal the XStream instance in action
---- Debugging information ----
------------------------------- (com.thoughtworks.xstream.converters.ConversionException)
com.thoughtworks.xstream.converters.reflection.SelfStreamingInstanceChecker:44 (null)
2. Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject() : Cannot marshal the XStream instance in action
---- Debugging information ----
-------------------------------
message : Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject()
cause-exception : com.thoughtworks.xstream.converters.ConversionException
cause-message : Cannot marshal the XStream instance in action
------------------------------- (com.thoughtworks.xstream.converters.ConversionException)
com.thoughtworks.xstream.converters.reflection.SerializationMethodInvoker:140 (null)
3. Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject() : Cannot marshal the XStream instance in action
---- Debugging information ----
-------------------------------
message : Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject()
cause-exception : com.thoughtworks.xstream.converters.ConversionException
cause-message : Cannot marshal the XStream instance in action
------------------------------- (com.thoughtworks.xstream.converters.ConversionException). Message payload is of type: byte[] (org.mule.api.transformer.TransformerMessagingException)
org.mule.transformer.AbstractTransformer:139 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/api/transformer/TransformerMessagingException.html)
--------------------------------------------------------------------------------
Root Exception stack trace:
com.thoughtworks.xstream.converters.ConversionException: Cannot marshal the XStream instance in action
---- Debugging information ----
-------------------------------
at com.thoughtworks.xstream.converters.reflection.SelfStreamingInstanceChecker.marshal(SelfStreamingInstanceChecker.java:44)
at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
+ 3 more (set debug level logging or '-Dmule.verbose.exceptions=true' for everything)
********************************************************************************
ERROR 2013-05-16 09:44:13,182 [[mediation_mod].testObjetFlow1.stage1.02] org.mule.exception.DefaultMessagingExceptionStrategy:
********************************************************************************
Message : Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject() : Cannot marshal the XStream instance in action
---- Debugging information ----
-------------------------------
message : Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject()
cause-exception : com.thoughtworks.xstream.converters.ConversionException
cause-message : Cannot marshal the XStream instance in action
------------------------------- (com.thoughtworks.xstream.converters.ConversionException). Message payload is of type: byte[]
Code : MULE_ERROR--2
--------------------------------------------------------------------------------
Exception stack is:
1. Cannot marshal the XStream instance in action
---- Debugging information ----
------------------------------- (com.thoughtworks.xstream.converters.ConversionException)
com.thoughtworks.xstream.converters.reflection.SelfStreamingInstanceChecker:44 (null)
2. Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject() : Cannot marshal the XStream instance in action
---- Debugging information ----
-------------------------------
message : Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject()
cause-exception : com.thoughtworks.xstream.converters.ConversionException
cause-message : Cannot marshal the XStream instance in action
------------------------------- (com.thoughtworks.xstream.converters.ConversionException)
com.thoughtworks.xstream.converters.reflection.SerializationMethodInvoker:140 (null)
3. Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject() : Cannot marshal the XStream instance in action
---- Debugging information ----
-------------------------------
message : Could not call org.apache.cxf.binding.soap.SoapMessage.writeObject()
cause-exception : com.thoughtworks.xstream.converters.ConversionException
cause-message : Cannot marshal the XStream instance in action
------------------------------- (com.thoughtworks.xstream.converters.ConversionException). Message payload is of type: byte[] (org.mule.api.transformer.TransformerMessagingException)
org.mule.transformer.AbstractTransformer:139 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/api/transformer/TransformerMessagingException.html)
--------------------------------------------------------------------------------
Root Exception stack trace:
com.thoughtworks.xstream.converters.ConversionException: Cannot marshal the XStream instance in action
---- Debugging information ----
-------------------------------
at com.thoughtworks.xstream.converters.reflection.SelfStreamingInstanceChecker.marshal(SelfStreamingInstanceChecker.java:44)
at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)
at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)
+ 3 more (set debug level logging or '-Dmule.verbose.exceptions=true' for everything)
********************************************************************************
我不知道我的逻辑是否错误，或者是否有简单的方法来完成这项工作? 谢谢您的帮助.
I dont know if my logic is wrong or if there is a simple way to get the job done ?? thak you for your help.
推荐答案
首先，我不会为简单地实例化一个类而创建custom-transformer，我只会使用一个表达式:
First, I would not create a custom-transformer for simply instantiating a class, I would just use an expression:
<expression-transformer
expression="#[new douane.DouanePK(message.inboundProperties.id,message.inboundProperties.type)]" />
第二，您得到的异常来自mulexml:object-to-xml-transformer无法使用XStream将SoapMessage对象转换为XML(这是预料之中的). cxf:jaxws-client的责任是在流程的响应阶段取消编组.
Second, the exception you're getting comes from the inability of mulexml:object-to-xml-transformer to transform a SoapMessage object to XML using XStream (which is kind of expected). It is the responsibility of cxf:jaxws-client to do this unmarshalling in the response phase of the flow.
因此，您需要将mulexml:object-to-xml-transformer和file:outbound-endpoint元素放在cxf:jaxws-client上方的response元素中，以便在CXF解组对正确对象的响应之后对其进行处理.
So you need to the mulexml:object-to-xml-transformer and the file:outbound-endpoint elements in a response element above the cxf:jaxws-client so they are processed after CXF has unmarshalled the response to the right object.
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