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