Component Code JS

Table of Contents

Description
Limitations
Properties
See also

Description

Executes the JS code specified by the argument in the product layer microservice.

Passes as input either an object with variable values or an object with the specified named arguments.
Any actions can be performed inside the body with application of the passed object in the context of the product layer.
On exit, the returned result is stored in a variable and also, if an object is returned, all its keys are mapped to the existing variables in the script and the values are saved.

Example: "return { a: x + y.name + z[0].caption };" for passed variables or parameters x = "abc", y = {"name": "def"}, z = [{"caption": "ghi"}] will return "abcdefghi" and assign to the existing script variable 'a', and body "{ a: "abcdefghi" }" to the return variable if given.

You can perform an asynchronous query if necessary: "return async function() { await GlobalUtils.wait(500); return { a: 1, b: x }; }".

Table 1. System Characteristics

Index	`154`
Short title	`js`
Types of scenarios	`All of them`
Starter module	`era_script_component_js`
Mode	Asynchronous
Icon
Branching pattern	Branching

Limitations

If a timeout is triggered, the script stops waiting for a response and passes control to the next component, the executed method is not terminated.

Properties

Table 2. Properties
Specification	Description
Title: `Code JS` Code: `code` Visibility: `no` Default: —	JS function code to be executed in node.js in a product layer microservice environment.
Title: `Parameter setting method` Code: `argsMode` Visibility: `no` Default: `vars`	Switches the parameter setting mode for the runtime environment. Possible values: `All variables` (`allvars`,`0`) - all variables with their values are passed. In JS code you can refer to them directly by their names. `Specified arguments` (`args`,`1`) - the 'Arguments' property specifies a list of named passed parameters. In JS code it is possible to refer to them by the specified names. When passing JSON string values, representing objects are available in code as objects, JSON arrays are available as arrays, strings and numbers default to strings, dates as a string, and blank values are left blank (null).
Title: `Arguments` Code: `args` Visibility: `yes` Default: —	List of parameters to be passed and their names. They can be accessed from executable code via names like normal variables. If the value is a JSON string with an object or array, the object or array will be accessed directly in the JS code when the corresponding variable is accessed.
Title: `Timeout, sec` Code: `timeoutSec` Visibility: `no` Default: 5	Argument defining the timeout of code execution in the node JS. When the timeout expires, the script passes control to the 'Transition, timeout' branch and the code continues to execute.
Title: `Result to variable` Code: `resultVar` Visibility: `no` Default: —	Variable where the full body of the execution result is stored. If the JS code returns an object or array, its string JSON representation is stored in a variable.
Title: `Error to variable` Code: `errorVar` Visibility: `no` Default: —	Variable where the string with the error code and text is saved. Some deployed errors are saved to the log file.
Title: `Transition` Code: `transfer` Visibility: `no` Default: —	Component to which control is passed.
Title: `Transition, Time` Code: `transferTimeout` Visibility: `no` Default: —	Component to which control is passed in case of timeout.
Title: `Transition, Error` Code: `transferError` Visibility: `no` Default: —	The component to which control is passed in case of an error.

Component Code JS

Description

Limitations

Properties

See also