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alert - 使用 CPF (MarkLogic) 时出现 xdmp:log 错误

问题描述

我试图按照关于 Marklogic 的教程来创建我们自己的 CPF。我几乎复制并粘贴了所有代码，并且大多数功能都在 xdmp:log 之外工作。CPF 将在完成任务时结束它的任务。可以在此处找到来自 marklogic 的文档简单 CPF 应用程序入门

万一我做错了什么，我会在这里发布我的代码以及我做了什么。

=======使用的文件=======

add-last-updated.xqy => 添加到 Modules 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 Modules 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“默认文档”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，代码有效，并且在第一次插入时编辑了文档输出，如下所示，但在 MarkLogic/Data/Logs/8000_ErrorLog 中找到的日志没有更新。此外，当我试图将 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。我将非常感谢任何有助于解决此问题的建议。

<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 mholstege 的建议，删除了我的“return”和“let”语句，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。对我来说是一个愚蠢的问题，感谢您的帮助。

标签： alertmarklogic

解决方案

您格式化代码的方式向我表明您认为xdmp:logandcpf:success行属于return，但事实并非如此：只有returnis 之后的第一个表达式。因此，当您重新排序行时，您可能会在此模块上遇到未定义的变量静态错误。你真的不需要letand return：你可以doc($document-uri)/book直接在xdmp:node-replace调用中使用。然后您可以随意重新排序序列。如果您希望 thexdmp:node-replace和 the位于变量xdmp:log的范围内，请$doc在该表达式序列周围加上括号。

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