Check for Empty String in Integration Server Flow Services

Knowledge base
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1

products versions - webMethods Integration Server (all versions)

Introduction

One of the most frequent tasks, when developing an integration solution, is to check whether a field contains data or is empty. This video shows an easy way to perform such a check in a Flow Service on webMethods Integration Server.

Pre-requisite

An Integration Server development environment must be available, but other than that no particular requirements exist.

Steps to follow

Instead of evaluating an expression like

(%customerRecord/addressList/shippingAddress/location/street% != $null) &&
(%customerRecord/addressList/shippingAddress/location/street% != "" )

you can simply use the following regular expression

/.+/

It evaluates to true if one or more characters are found in a field.

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@jahntech.cj

/[^ ]/ - We can also use this expression to validate if the provided input is not null or empty or spaces [ \t\r\n ] .

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