我正在尝试在 ubuntu 11.04 64 位上运行 Apache Synapse 示例，我发现在示例 nr 2 中评估 XPath 表达式存在问题。
我的 XPath 表达式：
$ <definitions xmlns="http://ws.apache.org/ns/synapse"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://ws.apache.org/ns/synapse http://synapse.apache.org/ns/2010/04/configuration/synapse_config.xsd">
<sequence name="main">
<switch source="//m0:getQuote/m0:request/m0:symbol" xmlns:m0="http://services.samples">
<case regex="IBM">
<!-- the property mediator sets a local property on the *current* message -->
<property name="symbol" value="Great stock - IBM"/>
</case>
<case regex="MSFT">
<property name="symbol" value="Are you sure? - MSFT"/>
</case>
<default>
<!-- it is possible to assign the result of an XPath expression as well -->
<property name="symbol" expression="fn:concat('Normal Stock - ', //m0:getQuote/m0:request/m0:symbol)"/>
</default>
</switch>
<log level="custom">
<!-- the get-property() XPath extension function allows the lookup of local message properties
as well as properties from the Axis2 or Transport contexts (i.e. transport headers) -->
<property name="symbol" expression="get-property('symbol')"/>
<!-- the get-property() function supports the implicit message headers To/From/Action/FaultTo/ReplyTo -->
<property name="epr" expression="get-property('To')"/>
</log>
<!-- Send the messages where they are destined to (i.e. the 'To' EPR of the message) -->
<send/>
</sequence>
它基于以下数据运行：
$ <soapenv:Body><m0:getQuote xmlns:m0="http://services.samples"><m0:request><m0:symbol>IBM</m0:symbol></m0:request></m0:getQuote></soapenv:Body></soapenv:Envelope>
结果是：
2011-08-08 15:37:04,227 [-] [HttpClientWorker-1] 调试 SwitchMediator XPath : //m0:getQuote/m0:request/m0:symbol 评估为：
2011-08-08 15:37:04,227 [-] [HttpClientWorker-1] 调试 SwitchMediator 没有匹配的开关案例 - 执行默认
虽然它应该去：
$<case regex="IBM">
<!-- the property mediator sets a local property on the *current* message -->
<property name="symbol" value="Great stock - IBM"/>
</case>
有谁知道可能是什么问题？几天前我已经安装了那个 ubuntu，所以有可能那个系统上缺少一些东西。