IBM Visualization Data Explorer User's Reference

Route

Category

Flow Control

Function

Routes an object through selector-specified output paths.

Syntax

output = Route(selector, input);

Inputs

Name	Type	Default	Description
selector	integer or integer list	0	paths for routing the input object
input	value list, string list, or object	no default	object to be routed

Outputs

Name	Type	Description
output	object	a possible path for routing the input object
...		additional paths

Functional Details

This module determines which of several output paths are executed.

selector

specifies the output paths that are to be executed. If the specified value is: NULL or 0 (zero): none of the modules that use Route output are executed. n: specifies the consumer that is executed. If n = 1, the modules that use Route's first output are executed; if n = 2, the modules that use Route's second output are executed; and so on. This parameter may also specify a list of integers, allowing multiple output paths to execute.

input

specifies an object to be routed to the output paths that are to be executed.

A single Route module can specify a maximum of 21 outputs. In the user interface, the default number of enabled tabs is two. (Tabs can be added to the module icon and removed with the appropriate ...Input Tab options in the Edit pull-down menu of the VPE.)

Notes:

1. Modules that use outputs that are not specified in the selector list are said to be "killed" and are not executed. If there are no outputs associated with selector (e.g., if selector is NULL or 0), none of the modules that use Route output is allowed to execute: all are killed.

   In general, modules that use the results of a killed module are also killed. An exception is Collect, which runs unless all inputs are killed (either by Route or by errors in modules that produce its inputs). .

2. In the scripting language, if the Route module is to work properly, it and modules downstream of it must be executed as part of a macro.

Components

All input components are propagated to the selected outputs.

Example Visual Programs

UsingSwitchAndRoute.net
UsingMessage.net
SIMPLE/Route.net

See Also

 Collect,  Switch

 Chapter 4. "Data Explorer Execution Model" in IBM Visualization Data Explorer User's Guide.

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