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HandlerFunctionsKeys

is an option that specifies the content of associations to which to apply handler functions.

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HandlerFunctionsKeys

HandlerFunctionsKeys

is an option that specifies the content of associations to which to apply handler functions.

Details

  • The following are typical settings for HandlerFunctionsKeys:
  • Automatictry to include only elements required by handler functions
    Allinclude all available elements
    {"key1","key2",…}include particular keys
  • The keys available with particular tasks are listed under the functions that submit the tasks.

Examples

Basic Examples  (7)

Display the result of evaluation after the task is finished:

Wolfram Language code: SessionSubmit[Integrate[Log[t] ^ 4 / Sqrt[1 - t ^ 2], {t, 0, 1}], HandlerFunctions -> <|"TaskFinished" :> MessageDialog|>, HandlerFunctionsKeys -> {"EvaluationResult"}]

Print the complete Association available to a handler function:

Wolfram Language code: SessionSubmit[N[Pi, 200], HandlerFunctions -> <|"TaskFinished" -> Print|>, HandlerFunctionsKeys -> All]

Display the result of the Print evaluated in a subkernel:

Wolfram Language code: LocalSubmit[Print["Hello!"], HandlerFunctions -> <|"PrintOutputGenerated" -> (Print[#PrintOutput]&)|>, HandlerFunctionsKeys -> {"EvaluationExpression", "PrintOutput"}]

Display a dialog when the message was generated:

Wolfram Language code: SessionSubmit[1 / 0, HandlerFunctions -> <|"MessageGenerated" -> MessageDialog|>, HandlerFunctionsKeys -> {"EvaluationExpression", "MessageOutput"}]

Print the message generated by the subkernel:

Wolfram Language code: LocalSubmit[1 / 0, HandlerFunctions -> <|"MessageGenerated" -> (Message[#MessageOutput]&)|>, HandlerFunctionsKeys -> {"MessageOutput"}]

Specify that the status code and content type are to be passed to any handler function:

Wolfram Language code: URLSubmit["http://www.wolfram.com", HandlerFunctions -> <|"TaskFinished" -> Print|>, HandlerFunctionsKeys -> {"StatusCode", "ContentType"}]

Receive the body of the response as a string:

Wolfram Language code: URLSubmit["http://www.wolfram.com", HandlerFunctions -> <|"BodyReceived" -> Print|>, HandlerFunctionsKeys -> {"Body"}]

Receive the body of the response as a list of bytes:

Wolfram Language code: URLSubmit["http://www.wolfram.com", HandlerFunctions -> <|"BodyReceived" -> Print|>, HandlerFunctionsKeys -> {"BodyBytes"}]

Receive the body of the response as a ByteArray:

Wolfram Language code: URLSubmit["http://www.wolfram.com", HandlerFunctions -> <|"BodyReceived" -> Print|>, HandlerFunctionsKeys -> {"BodyByteArray"}]
Wolfram Research (2016), HandlerFunctionsKeys, Wolfram Language function, https://reference.wolfram.com/language/ref/HandlerFunctionsKeys.html.

Text

Wolfram Research (2016), HandlerFunctionsKeys, Wolfram Language function, https://reference.wolfram.com/language/ref/HandlerFunctionsKeys.html.

CMS

Wolfram Language. 2016. "HandlerFunctionsKeys." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/HandlerFunctionsKeys.html.

APA

Wolfram Language. (2016). HandlerFunctionsKeys. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/HandlerFunctionsKeys.html

BibTeX

@misc{reference.wolfram_2026_handlerfunctionskeys, author="Wolfram Research", title="{HandlerFunctionsKeys}", year="2016", howpublished="\url{https://reference.wolfram.com/language/ref/HandlerFunctionsKeys.html}", note=[Accessed: 12-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_handlerfunctionskeys, organization={Wolfram Research}, title={HandlerFunctionsKeys}, year={2016}, url={https://reference.wolfram.com/language/ref/HandlerFunctionsKeys.html}, note=[Accessed: 12-June-2026]}