activiti designer源码的研究(三) 之servicetask调用除Java之后的其他语言发布的webservice

按照上一篇文章的配置，ServiceTask已经可以调用带有@webParam和@webResult发布的webservice了，但是怎么调用这些不带这些参数的发布的webservice了，因为其他语言并没有@webParam这些参数，请看下面的例子：

Counter.java

<span style="font-size:14px;">@WebService
public interface Counter {

/**
* Increase the counter in 1
*/
void inc();

/**
* Returns the current count
*
* @return the count
*/
@WebResult(name="count")
int getCount();

/**
* Resets the counter to 0
*/
void reset();

/**
* Sets the counter to value
*
* @param value the value of the new counter
*/
void setTo(@WebParam(name="value") int value);

<em> String prettyPrintCount(String prefix, String suffix);

<strong> </strong>String prettyPrintCountTwo(String suffixTwo, String prefixTwo);</em>
}</span>

发布之后，wsdl文件如下（关键内容）：

<xs:complexType name="prettyPrintCountTwo">
<xs:sequence>
<xs:element minOccurs="0" name="arg0" type="xs:string"/>
<xs:element minOccurs="0" name="arg1" type="xs:string"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="prettyPrintCountTwoResponse">
<xs:sequence>
<xs:element minOccurs="0" name="return" type="xs:string"/>
</xs:sequence>
</xs:complexType>

我们会发现prettyPrintCountTwo方法的第一个参数名默认为arg0,第二个参数名默认为arg1

返回值的默认名为return

于是我在bpmn20.xml中进行了下面的配置

<span style="font-size:18px;"><serviceTask id="servicetask3" name="Service Task" implementation="##WebService" operationRef="tns:prettyPrintCountTwoOperation">
<dataInputAssociation>
<sourceRef>PrettyPrintResult</sourceRef>
<targetRef>arg0</targetRef>
</dataInputAssociation>
<dataInputAssociation>
<sourceRef>PrefixTwoVariable</sourceRef>
<targetRef>arg1</targetRef>
</dataInputAssociation>
<dataOutputAssociation>
<sourceRef>return</sourceRef>
<targetRef>PrettyPrintTwoResult</targetRef>
</dataOutputAssociation>
</serviceTask></span>

部署之后，然后运行，会发现会报如下错误

<span style="font-size:18px;">junit.framework.ComparisonFailure: expected:<The counter has the value -1. Good news 0 append What news> but was:<null>
at junit.framework.Assert.assertEquals(Assert.java:100)
at junit.framework.Assert.assertEquals(Assert.java:107)
at junit.framework.TestCase.assertEquals(TestCase.java:269)
at org.activiti.engine.test.bpmn.servicetask.WebServiceSimplisticTwoTest.testWebServiceInvocationWithSimplisticDataFlow(WebServiceSimplisticTwoTest.java:46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at junit.framework.TestCase.runTest(TestCase.java:176)
at org.activiti.engine.impl.test.PvmTestCase.runTest(PvmTestCase.java:65)
at junit.framework.TestCase.runBare(TestCase.java:141)
at org.activiti.engine.impl.test.AbstractActivitiTestCase.runBare(AbstractActivitiTestCase.java:102)
at junit.framework.TestResult$1.protect(TestResult.java:122)
at junit.framework.TestResult.runProtected(TestResult.java:142)
at junit.framework.TestResult.run(TestResult.java:125)
at junit.framework.TestCase.run(TestCase.java:129)
at junit.framework.TestSuite.runTest(TestSuite.java:255)
at junit.framework.TestSuite.run(TestSuite.java:250)
at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:84)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
</span>

会发现return并不存在，明明在wsdl中是return，怎么会不存在了？

于是我在activiti-cxf的CxfWSDLImport中测试SimpleStructureDefinition中存的是什么东西，结果发现return读入之后变成了_return，所以只要把return改为_return就OK了