Wso2esb：錯誤而在開關辦案空值

我使用wso2esb 4.7.0和wso2dss 3.1.0.i要選擇從table.For一些列，我在DSS使用下面的查詢：Wso2esb：錯誤而在開關辦案空值

select roleid,rolename,rolecode from mrole where clientid = ? and ModifiedOn = ?

它的工作在DSS罰款以及ESB also.Output是這樣的：

{"roleid":"1077282521908571","rolename":"adminrole","rolecode":"adminrole"},{"roleid":"1077282521908571","rolename":"adminrole","rolecode":"adminrole"},{"roleid":"1077278842127704","rolename":"everyonerole","rolecode":"everyonerole"},{"roleid":"1077282521908571","rolename":"adminrole","rolecode":"adminrole"}

這是在第二種情況下一個case.Now，如果我沒有得到modifiedon那麼明顯它顯示了在像DSS錯誤：

Caused by: javax.xml.stream.XMLStreamException: DS Fault Message: Error in 'SQLQuery.processNormalQuery' 
DS Code: DATABASE_ERROR 
Source Data Service:- 
Name: muser_DataService2.0 
Location: /muser_DataService2.0.dbs 
Description: N/A 
Default Namespace: http://ws.wso2.org/dataservice 
Current Request Name: Select_Role_Details_Op 
Current Params: {clientid=214057357158656, modifiedon=} 
Nested Exception:- 
java.lang.NumberFormatException: For input string: ""

爲了解決這個我使用開關殼體在像ESB：

<switch source="get-property('ModifiedOn')"> 
      <case regex="''"> 
       <property name="ModifiedOn" value="0" scope="default" type="STRING"/> 
       <log level="custom"> 
        <property name="ModifiedOn in case of null: " 
          expression="get-property('ModifiedOn')"/> 
       </log> 
      </case>   
</switch>

它示出了在ESB警告消息，如：

[2014-10-08 11:43:54,100] WARN - SwitchCase Provided character sequence for switch case condition is 'null'. Switch case will not be executed.

和不執行開關情況下，它直接地向前移動，併產生故障以及dss顯示錯誤，如何在switch case中給出null條件？

來源

2014-10-08 user3129056

使用布爾 XPath函數來驗證你的財產有：

<filter xpath="boolean(get-property('ModifiedOn'))"> 
    <then> 
     ... 
    </then> 
    <else> 
     ... 
    </else> 
</filter>

來源

2014-10-08 07:23:39

Wso2esb：錯誤而在開關辦案空值

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