Mule 流仅处理来自 csv 文件的 1 条记录

Question

我有一个 FILE -> CHOICE -> DATAMAPPER -> LOGGER 的 mule 流程

FILE 端点处理一个包含 40 条记录的 csv 文件

DATAMAPPER 将 csv 转换为 JSON，并在预览中运行时以 JSON 格式显示所有 40 条记录

LOGGER 将有效负载显示为字节而不是 JSON，当我将 JSON 转换为对象时，它以 JSON 格式显示有效负载，但只有 1 条记录。

我的查询： 1. 您如何设置工作流来处理所有 40 条记录并将所有记录转换为 JSON 并从流中全部输出？

1. 输出是一个字节是否正确，因为数据映射器输出是 JSON，所以我希望在调试模式下查看有效负载时看到所有 JSON 格式的记录？

Answer 1

你可以这样做。

<flow name="csv-to-jsonFlow">
        <file:inbound-endpoint path="/src/main/resources/csv" connector-ref="File" responseTimeout="10000" doc:name="File">
            <file:filename-regex-filter pattern=".*csv" caseSensitive="true"/>
        </file:inbound-endpoint>
        <dw:transform-message doc:name="Transform Message">
            <dw:set-payload><![CDATA[%dw 1.0
%output application/json
---
payload]]></dw:set-payload>
        </dw:transform-message>
        <object-to-string-transformer doc:name="Object to String"/>
        <logger message="#[payload]" level="INFO" doc:name="Logger"/>
    </flow>

CSV 文件示例：

name,age,gender
janos,29,male
juan,40,male
pedro,22,male
carla,34,female
jose,30,male
anne,25,female
rey,33,male
joyce,27,female
pia,20,female
ard,27,male
janos,29,male
juan,40,male
pedro,22,male
carla,34,female
jose,30,male
anne,25,female
rey,33,male
joyce,27,female
pia,20,female
ard,27,male
janos,29,male
juan,40,male
pedro,22,male
carla,34,female
jose,30,male
anne,25,female
rey,33,male
joyce,27,female
pia,20,female
ard,27,male
janos,29,male
juan,40,male
pedro,22,male
carla,34,female
jose,30,male
anne,25,female
rey,33,male
joyce,27,female
pia,20,female
ard,27,male

样本输出：

[
  {
    "name": "janos",
    "age": "29",
    "gender": "male"
  },
  {
    "name": "juan",
    "age": "40",
    "gender": "male"
  },
  {
    "name": "pedro",
    "age": "22",
    "gender": "male"
  },
  {
    "name": "carla",
    "age": "34",
    "gender": "female"
  },
  {
    "name": "jose",
    "age": "30",
    "gender": "male"
  },
  {
    "name": "anne",
    "age": "25",
    "gender": "female"
  },
  {
    "name": "rey",
    "age": "33",
    "gender": "male"
  },
  {
    "name": "joyce",
    "age": "27",
    "gender": "female"
  },
  {
    "name": "pia",
    "age": "20",
    "gender": "female"
  },
  {
    "name": "ard",
    "age": "27",
    "gender": "male"
  },
  {
    "name": "janos",
    "age": "29",
    "gender": "male"
  },
  {
    "name": "juan",
    "age": "40",
    "gender": "male"
  },
  {
    "name": "pedro",
    "age": "22",
    "gender": "male"
  },
  {
    "name": "carla",
    "age": "34",
    "gender": "female"
  },
  {
    "name": "jose",
    "age": "30",
    "gender": "male"
  },
  {
    "name": "anne",
    "age": "25",
    "gender": "female"
  },
  {
    "name": "rey",
    "age": "33",
    "gender": "male"
  },
  {
    "name": "joyce",
    "age": "27",
    "gender": "female"
  },
  {
    "name": "pia",
    "age": "20",
    "gender": "female"
  },
  {
    "name": "ard",
    "age": "27",
    "gender": "male"
  },
  {
    "name": "janos",
    "age": "29",
    "gender": "male"
  },
  {
    "name": "juan",
    "age": "40",
    "gender": "male"
  },
  {
    "name": "pedro",
    "age": "22",
    "gender": "male"
  },
  {
    "name": "carla",
    "age": "34",
    "gender": "female"
  },
  {
    "name": "jose",
    "age": "30",
    "gender": "male"
  },
  {
    "name": "anne",
    "age": "25",
    "gender": "female"
  },
  {
    "name": "rey",
    "age": "33",
    "gender": "male"
  },
  {
    "name": "joyce",
    "age": "27",
    "gender": "female"
  },
  {
    "name": "pia",
    "age": "20",
    "gender": "female"
  },
  {
    "name": "ard",
    "age": "27",
    "gender": "male"
  },
  {
    "name": "janos",
    "age": "29",
    "gender": "male"
  },
  {
    "name": "juan",
    "age": "40",
    "gender": "male"
  },
  {
    "name": "pedro",
    "age": "22",
    "gender": "male"
  },
  {
    "name": "carla",
    "age": "34",
    "gender": "female"
  },
  {
    "name": "jose",
    "age": "30",
    "gender": "male"
  },
  {
    "name": "anne",
    "age": "25",
    "gender": "female"
  },
  {
    "name": "rey",
    "age": "33",
    "gender": "male"
  },
  {
    "name": "joyce",
    "age": "27",
    "gender": "female"
  },
  {
    "name": "pia",
    "age": "20",
    "gender": "female"
  },
  {
    "name": "ard",
    "age": "27",
    "gender": "male"
  }
]

希望这会有所帮助。