Control

Five boxes drive a scenario’s execution flow.

The names are the palette’s own

Every section of this catalogue is titled with the exact label the application displays, so that you find the box in the add palette. Where a label is a term of art, the plain meaning follows in parentheses — Switch (N-way branch).

A reminder: every box also has the implicit in, error and done ports — see Ports and links.

Input / Param

Declares the scenario’s parameters.

Inputs	none
Outputs	value — a single object { name: value, … }
Configuration	name (the parameter’s name), valueType (its type and default value)

The values are supplied at launch, by --param name=value on the command line, or asked for interactively if the run reaches the box with no value available.

Input "baseUrl" (string)  ──►  env port of the request

Output / Return

Exposes a result to the scenario’s caller.

Inputs	value
Outputs	none — it is a sink: neither error nor done
Configuration	name

A scenario called by a Run scenario action makes each of its outputs available on the caller’s output:<name> port.

If

Two-way branch.

Inputs	left, right
Outputs	then, else
Configuration	operator: lt, lte, eq, gte, gt, ne, contains — plus left and right as literal values

A tip: if neither operand is wired nor filled in, the box simply tests the truthiness of the signal received on in. That is the “if we got this far” with no explicit condition.

Switch (N-way branch)

Branch with N ways out.

Inputs	on
Outputs	one case-<id> port per declared case, plus default
Configuration	cases: a list of { id, value }

Preferable to a cascade of If boxes as soon as there are more than two outcomes: each case is its own wire, visually legible.

Retry

Error-recovery boundary.

Inputs	maxAttempts, delay
Outputs	attempt (each attempt), exhausted (attempts used up)
Configuration	see below

Field	Default	Role
maxAttempts	3	Maximum number of attempts
backoff	fixed	fixed, linear or exponential
delay + delayUnit	—	Base delay (ms, s, min)
factor	2	Growth factor in exponential mode
maxDelay + maxDelayUnit	—	Ceiling on the delay
retryOnError	true	Retry on an error
retryOnFailure	false	Retry on a business failure
retryOnStatus	—	A list of HTTP statuses, for example [429, 503]

The subgraph wired onto attempt makes up the retried scope. On success, the way out is via done. This box has no error port: it is the boundary.

Réessayer (3, exponentiel, [429,503])
  ├─ attempt   ──► Requête HTTP ──► Assert
  └─ exhausted ──► Throw « service indisponible »