未知内容类型:json如何在MarkLogic 8

时间:2015-06-22 15:59:25

标签: json xml marklogic mlcp

我正在尝试使用MLCP和摄取时的基本转换脚本将一堆JSON文件加载到MarkLogic 8中。

我可以按原样加载文件,我在ML中获取JSON对象。

我想要的是在摄取时将JSON转换为XML,所以我写了一个基本的转换:

xquery version "1.0-ml";

module namespace ingest = "http://dikw.com/ingest/linkedin";

import module namespace json="http://marklogic.com/xdmp/json" at "/MarkLogic/json/json.xqy";
import module namespace sem="http://marklogic.com/semantics" at "/MarkLogic/semantics.xqy";

declare namespace basic="http://marklogic.com/xdmp/json/basic";

declare default function namespace "http://www.w3.org/2005/xpath-functions";

declare option xdmp:mapping "false";

declare function ingest:transform(
  $content as map:map,
  $context as map:map
) as map:map*
{
  let $org-doc := map:get($content, "value")
  let $jsonxml := json:transform-from-json($org-doc)
  let $name := $jsonxml//basic:full__name
  let $_ := xdmp:log(concat('Inserting linkedin profile ', $name, '.xml..'))
  let $new-doc := 
    document {
      <json>{
        $jsonxml
      }</json>
  }
  return (
    map:put($content, "value", $new-doc),
    $content
  )
};

现在,如果我使用MLCP来加载没有变换的文档,它可以工作,但如上所述,我在ML8中获得了JSON。 (我使用Roxy来调用加载到MLCP的正确环境。)

./ml $ENV mlcp import -input_file_path content/linkedin -input_file_type documents  

以上工作正常。

但是使用这样的变换:

./ml $ENV mlcp import -input_file_path content/linkedin -input_file_type documents  -transform_module /ingest/linkedin.xqy -output_collections incoming,incoming/linkedin

我收到错误:&#34; ERROR contentpump.MultithreadedMapper:未知内容类型:json&#34;

15/06/22 17:37:12 INFO contentpump.ContentPump: Hadoop library version: 2.0.0-mr1-cdh4.3.0
15/06/22 17:37:12 INFO contentpump.LocalJobRunner: Content type is set to MIXED.  The format of the  inserted documents will be determined by the MIME  type specification configured on MarkLogic Server.
15/06/22 17:37:12 WARN util.KerberosName: Kerberos krb5 configuration not found, setting default realm to empty
15/06/22 17:37:12 INFO input.FileInputFormat: Total input paths to process : 9
15/06/22 17:37:13 ERROR contentpump.MultithreadedMapper: Unknown content type: json
java.lang.IllegalArgumentException: Unknown content type: json
    at com.marklogic.mapreduce.ContentType.forName(ContentType.java:107)
    at com.marklogic.contentpump.utilities.TransformHelper.getTransformInsertQry(TransformHelper.java:124)
    at com.marklogic.contentpump.TransformWriter.write(TransformWriter.java:97)
    at com.marklogic.contentpump.TransformWriter.write(TransformWriter.java:46)
    at org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:85)
    at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:106)
    at com.marklogic.contentpump.DocumentMapper.map(DocumentMapper.java:46)
    at com.marklogic.contentpump.DocumentMapper.map(DocumentMapper.java:32)
    at com.marklogic.contentpump.BaseMapper.runThreadSafe(BaseMapper.java:51)
    at com.marklogic.contentpump.MultithreadedMapper$MapRunner.run(MultithreadedMapper.java:376)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

在Query Console中,事情按预期工作,按预期将JSON变量转换为XML文档......

我在这里缺少什么?

TX

雨果

1 个答案:

答案 0 :(得分:3)

根据https://docs.marklogic.com/guide/ingestion/content-pump#id_82518,似乎有一些缺失。

您没有指定要存储的文档类型(-document_type xml) - 您只存储xml,但使用“documents”作为输入类型(假设这些是.json扩展名?) - 所以代码不知道转换正在从json转换为xmls。

您没有更改URI - 因此默认的mime映射不会知道您的输入和输出类型预计会有所不同:

https://docs.marklogic.com/guide/ingestion/content-pump#id_17589

无论你使用什么后缀,它都不适用于没有提供额外信息的JSON输入和XML存储(参见上面的链接)