This module contains functions that allow you to interact with the underlying system.
To use this module, you must import it to your DataWeave code, for example,
by adding the line import * from dw::System
to the header of your
DataWeave script.
Functions
envVar
envVar(variableName: String): String | Null
Returns an environment variable with the specified name or null
if the
environment variable is not defined.
Parameters
Name | Description |
---|---|
|
String that provides the name of the environment variable. |
Example
This example returns a Mac command console (SHELL
) path and returns null
on FAKE_ENV_VAR
(an undefined environment variable). SHELL
is one of the
standard Mac environment variables. Also notice that the import
command
enables you to call the function without prepending the module name to it.
Source
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%dw 2.0
import * from dw::System
output application/json
---
{
"envVars" : [
"real" : envVar("SHELL"),
"fake" : envVar("FAKE_ENV_VAR")
]
}
Output
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"envVars": [
{
"real": "/bin/bash"
},
{
"fake": null
}
]
envVars
envVars(): Dictionary<String>
Returns all the environment variables defined in the host system as an array of strings.
Example
This example returns a Mac command console (SHELL
) path. SHELL
is one of
the standard Mac environment variables. To return all the environment
variables, you can use dw::System::envVars()
.
Source
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%dw 2.0
import dw::System
output application/json
---
{ "envVars" : dw::System::envVars().SHELL }
Output
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{ "envVars": "/bin/bash" }