题
我想建立一个代理:
1.致电授权并给出结果确定或失败的服务(第一服务)
2.如果结果“确定”,请致电服务
问题是,当第一服务回馈消息时:
<?xml version='1.0' encoding='utf-8'?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Body>
<result>
<status>OK</status>
<message></message>
</result>
</soapenv:Body>
</soapenv:Envelope>
我以序列进行“过滤”。这是XML:
<proxy xmlns="http://ws.apache.org/ns/synapse" name="TestProxy" transports="https,http" statistics="disable" trace="enable" startOnLoad="true">
<target endpoint="AuthorizationService">
<outSequence>
<log level="full" />
<filter xpath="/result/status='OK'">
<then>
<send>
<endpoint>
<address uri="http://192.168.1.140:8080/axis2/services/TaskService.TaskServiceHttpEndpoint/getTask" />
</endpoint>
</send>
</then>
<else>
<makefault version="soap11">
<code xmlns:soap11Env="http://schemas.xmlsoap.org/soap/envelope/" value="soap11Env:VersionMismatch" />
<reason value="1" />
<role>2</role>
<detail>3</detail>
</makefault>
</else>
</filter>
<log level="full" />
</outSequence>
</target>
</proxy>
运行应用程序时,ESB始终提供消息:
16:08:59,358 [-] [HttpClientWorker-4] INFO Start : Log mediator
16:08:59,361 [-] [HttpClientWorker-4] INFO To: http://www.w3.org/2005/08/addressing/anonymous, WSAction: , SOAPAction: , MessageID: urn:uuid:0bc33821-c4f1-448e-a7dc-be4194be8e99, Direction: response, Envelope: <?xml version='1.0' encoding='utf-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Body><result><status>OK</status><message></message></result></soapenv:Body></soapenv:Envelope>
16:08:59,361 [-] [HttpClientWorker-4] INFO End : Log mediator
16:08:59,361 [-] [HttpClientWorker-4] INFO Start : Filter mediator
16:08:59,361 [-] [HttpClientWorker-4] INFO XPath expression : /result/status='OK' evaluates to false - executing the else path child mediators
似乎过滤的状况总是错误的。
过滤器中XPATH的正确说明是什么?
解决方案
看来您可能给出了错误的XPath表达。您不能为XPATH值提供XPATH和布尔表达式,即不能为“/result/status ='ok'”,但必须为“/result/status”。然后,根据您的序列,如果存在此元素,它将在此之后发射部分。由于您还需要根据XPATH评估布尔条件,因此我将根据开关中介(Switch Mediator)提供替代方案(通过设置属性可以为过滤器完成相同的替代方案):
<proxy xmlns="http://ws.apache.org/ns/synapse" name="TestProxy" transports="https,http" statistics="disable" trace="enable" startOnLoad="true">
<target endpoint="AuthorizationService">
<outSequence>
<log level="full" />
<switch source="//result/status">
<case regex="OK">
<send>
<endpoint>
<address uri="http://192.168.1.140:8080/axis2/services/TaskService.TaskServiceHttpEndpoint/getTask" />
</endpoint>
</send>
</case>
<default>
<makefault version="soap11">
<code xmlns:soap11Env="http://schemas.xmlsoap.org/soap/envelope/" value="soap11Env:VersionMismatch" />
<reason value="1" />
<role>2</role>
<detail>3</detail>
</makefault>
</default>
</switch>
<log level="full" />
</outSequence>
</target>
</proxy>
其他提示
您的代理配置应如下
<proxy xmlns="http://ws.apache.org/ns/synapse" name="TestProxy" transports="https,http" statistics="disable" trace="enable" startOnLoad="true">
<target endpoint="AuthorizationService">
<outSequence>
<log level="full"/>
<filter source="/result/status" regex="ok">
<then>
<send>
<endpoint>
<address uri="http://192.168.1.140:8080/axis2/services/TaskService.TaskServiceHttpEndpoint/getTask"/>
</endpoint>
</send>
</then>
<else>
<makefault version="soap11">
<code xmlns:soap11Env="http://schemas.xmlsoap.org/soap/envelope/" value="soap11Env:VersionMismatch"/>
<reason value="1"/>
<role>2</role>
<detail>3</detail>
</makefault>
<send/>
</else>
</filter>
</outSequence>
</target>
<description></description>
</proxy>
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