MIME Type Metadata Selector (.^mimeType)

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MIME Type Metadata Selector (.^mimeType)

Returns the MIME type (without parameters) of a value, for example, application/json, and { “myMimeType” : payload.^mimeType } might return { “myMediaType”: “/” } for an input POJO.

In the following Mule app flow, the Loggers use payload.^mimeType to select a string “my string”, then to select a string that is set within an fx expression (#[“my string as String type” as String]) in the Set Payload (set-payload) component.

Mule App XML in Anypoint Studio:

<flow name=”setpayloadobjectFlow” >

  <scheduler doc:name=”Scheduler” >

    <scheduling-strategy >

      <fixed-frequency frequency=”15″ timeUnit=”SECONDS”/>

    </scheduling-strategy>

  </scheduler>

  <!– Set the payload to “my string”. –>

  <set-payload value='”my string”‘ doc:name=”Set Payload” />

  <!– Select the MIME type of “my string”. –>

  <logger level=”INFO” doc:name=”Logger” message=’#[payload.^mimeType]’/>

  <!– Set the payload using the fx expression “my string” as String. –>

  <set-payload value=’#[“my string as String type” as String]’ doc:name=”Set Payload” />

  <!– Select the MIME type of a Java string. –>

  <logger level=”INFO” doc:name=”Logger” message=’#[payload.^mimeType]’/>

</flow>

The Studio console output shows that the simple string has the MIME type /, while the string that is set in the fx expression has the MIME type application/java.

Console Output in Anypoint Studio:

INFO  2019-04-20 17:02:07,762 [[MuleRuntime].cpuLight.06:

 [setpayloadobject].setpayloadobjectFlow.CPU_LITE @2d6f64b9]

 [event: b4097b00-63c8-11e9-bcff-8c8590a99d48]

 org.mule.runtime.core.internal.processor.LoggerMessageProcessor:

 */*

INFO  2019-04-20 17:02:08,029 [[MuleRuntime].cpuLight.06:

 [setpayloadobject].setpayloadobjectFlow.CPU_LITE @2d6f64b9]

 [event: b4097b00-63c8-11e9-bcff-8c8590a99d48]

 org.mule.runtime.core.internal.processor.LoggerMessageProcessor:

 application/java

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