xdmp:log 使用 CPF (MarkLogic) 时出错

Question

我试图按照 Marklogic 上的教程创建我们自己的 CPF。我几乎复制并粘贴了所有代码，除了 xdmp:log 之外，大多数功能都可以使用。 CPF 将在达到它时结束它的任务。 marklogic 的文档可以在这里找到 Getting Started with a Simple CPF Application

如果我做错了什么，我会post我的代码和我所做的。

=======使用的文档=======

add-last-updated.xqy => 添加到模块 DB

xquery version "1.0-ml";
import module namespace cpf="http://marklogic.com/cpf" 
  at "/MarkLogic/cpf/cpf.xqy";
declare variable $cpf:document-uri as xs:string external;
declare variable $cpf:transition as node() external;
if (cpf:check-transition($cpf:document-uri,$cpf:transition)) then try {
  let $doc := fn:doc($cpf:document-uri)
  return
      xdmp:node-insert-child(
        $doc/book,
        <last-updated>{fn:current-dateTime()}</last-updated>
      ),
  xdmp:log( "add last-updated ran OK" ),
  cpf:success($cpf:document-uri, $cpf:transition, ())
} catch ($e) {
  cpf:failure($cpf:document-uri, $cpf:transition, $e, ())
}
else ()

add-copyright.xqy => 添加到模块 DB

xquery version "1.0-ml";
import module namespace cpf = "http://marklogic.com/cpf" 
  at "/MarkLogic/cpf/cpf.xqy";
declare variable $cpf:document-uri as xs:string external;
declare variable $cpf:transition as node() external;
if (cpf:check-transition($cpf:document-uri,$cpf:transition)) then try {
  let $doc := fn:doc( $cpf:document-uri )
  return
      xdmp:node-insert-child( 
        $doc/book,
        <copyright>
          <year>2010</year>
          <holder>The Publisher</holder>
        </copyright>),
      xdmp:log( "add copyright ran OK" ),
      cpf:success( $cpf:document-uri, $cpf:transition, () )
}
catch ($e) {
  cpf:failure( $cpf:document-uri, $cpf:transition, $e, () )
}
else ()

copyright.xml => 添加到管道并附加到 "Default Documents" 域

<pipeline xmlns="http://marklogic.com/cpf/pipelines">
  <pipeline-name>Copyright Pipeline</pipeline-name>
  <pipeline-description>Pipeline to test CPF</pipeline-description>
  <success-action>
    <module>/MarkLogic/cpf/actions/success-action.xqy</module>
  </success-action>
  <failure-action>
    <module>/MarkLogic/cpf/actions/failure-action.xqy</module>
  </failure-action>
  <state-transition>
    <annotation>
      When a document containing ‘book' as a root element is created, 
      add a ‘copyright' statement.
    </annotation>
    <state>http://marklogic.com/states/initial</state>
    <on-success>http://marklogic.com/states/done</on-success>
    <on-failure>http://marklogic.com/states/error</on-failure>
    <execute>
      <condition>
        <module>/MarkLogic/cpf/actions/namespace-condition.xqy</module>
        <options xmlns="/MarkLogic/cpf/actions/namespace-condition.xqy">
          <root-element>book</root-element>
          <namespace/>
        </options>
      </condition>
      <action>
        <module>add-copyright.xqy</module>
      </action>
    </execute>
  </state-transition>
  <state-transition>
    <annotation>
      When a document containing ‘book' as a root element is updated, 
      add a ‘last-updated' element
    </annotation>
    <state>http://marklogic.com/states/updated</state>
    <on-success>http://marklogic.com/states/done</on-success>
    <on-failure>http://marklogic.com/states/error</on-failure>
    <execute>
      <condition>
        <module>/MarkLogic/cpf/actions/namespace-condition.xqy</module>
        <options xmlns="/MarkLogic/cpf/actions/namespace-condition.xqy">
          <root-element>book</root-element>
          <namespace/>
        </options>
      </condition>
      <action>
        <module>add-last-updated.xqy</module>
      </action>
    </execute>
  </state-transition>
</pipeline>

======测试使用======

xquery version "1.0-ml";
let $contents :=   
  <book>
    <bookTitle>All About George</bookTitle>
    <chapter1>
      <chapterTitle>Curious George</chapterTitle>
      <para>
        George Washington crossed the Delaware to see what was on the other side.
      </para>
    </chapter1>
  </book>
return
  xdmp:document-insert("/content.xml", $contents)

一般来说，代码可以正常工作，并且文档在第一次插入时被编辑输出，如下所示，但是在 MarkLogic/Data/Logs/8000_ErrorLog 中找到的日志没有更新。此外，当我尝试将 xdmp:log 置于 xdmp:node-insert-child 之上时，CPF 会过早停止并且节点不会被编辑。如果有任何建议可以帮助解决此问题，我将不胜感激。

<book>
  <bookTitle>All About George</bookTitle>
  <chapter1>
    <chapterTitle>Curious George</chapterTitle>
    <para>
      George Washington crossed the Delaware to see what was on the other side.
    </para>
  </chapter1>
  <copyright>
    <year>2010</year>
    <holder>The Publisher</holder>
  </copyright>
</book>

========更新========

我遵循了 mholstege 的建议，删除了我的 "return" 和 "let" 声明，并按照 grtjn 的建议删除了日志。从那里我意识到日志被推送到 "TaskServer_Error" 日志中。我的一个愚蠢的问题，感谢您的帮助。

Answer 1

你格式化代码的方式向我建议你认为 xdmp:log 和 cpf:success 行属于 return，但事实并非如此：只有第一个表达式在 return 之后。因此，当您重新排序这些行时，您可能会在此模块上遇到未定义的变量静态错误。您实际上并不需要 let 和 return：您可以直接在 xdmp:node-replace 调用中使用 doc($document-uri)/book。然后你可以随意重新排序序列。如果您希望 xdmp:node-replace 和 xdmp:log 位于 $doc 变量的范围内，请将该表达式序列用括号括起来。

xdmp:log 使用 CPF (MarkLogic) 时出错

xdmp:log Error while using CPF (MarkLogic)

alert

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