Is their a way to make an http adapter wait a certain number of seconds?

Question

Question

Julie Marulappa · Sep 27, 2018

I have an http adapter that calls out to a web service and is looking for a "Completed" response. I want the adapter to wait a certain number of seconds before calling out again to get a response. I have tried setting the retry interval on the business operation but that does not do it. See my code below.

While pResponse.StringValue = "Processing" {
set tSC=..Adapter.PostURL(tURL,.tHTTPResponse,,tId)
do tHTTPResponse.Data.Rewind()
set pResponse.StringValue = tHTTPResponse.Data.Read(3000000,.tSC)
$$$TRACE("Second Response: "_pResponse.StringValue)

}

Discussion (5)1

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Julius Kavay · Sep 27, 2018

HANG command exists.

You can put between each command (if you have enought time ;-)) ) an hang command:

while response.StringValue="Processing" {
hang 5 // pause for 5 seconds
// get new response
}

Regards and
have a nice day
Julius

0 0

score 0 · Answer 1 · 2018-09-28T12:52:40-04:00

Julie Marulappa · Sep 28, 2018

Thanks, this worked great.

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score 0 · Answer 2 · 2018-10-02T14:54:49-04:00

Eduard Lebedyuk · Oct 2, 2018

Instead of

$zutil(96,39)

you can use

 $$$MaxStringLength

for the same effect, but greater readability.

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score 1 · Answer 3 · 2018-09-27T18:34:24-04:00

Redefine HTTP adapter like this:

Class Production.Adapter.HTTPOutboundAdapter Extends EnsLib.HTTP.OutboundAdapter
{

Method PostURL(pURL As %String, Output pHttpResponse As %Net.HttpResponse, pFormVarNames As %String, pData...) As %Status [ CodeMode = expression ]
{
..SendFormDataArray(.pHttpResponse, "POST", ..GetRequest(), .pFormVarNames, .pData, pURL)
}

ClassMethod GetRequest() As %Net.HttpRequest
{
    set request = ##class(%Net.HttpRequest).%New()
    set request.Timeout = 300 // Wait 300 seconds for response
    quit request
}

}

And use it instead of default adapter.

score 0 · Answer 4 · 2018-10-02T10:56:15-04:00

Hang is not recommended to use in business component as the business component/adapter as the component or adapter will be blocked for that specified time.

However I would suggest something else in your code, to use Read($zutil(96,39)) instead of fixed value. $zutil(96,39) contains the number of characters that a String can hold. If Intersystems increase the number of characters for a string in future it will automatically take that maximum characters .