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Flows
This documentation describes how Flows can be run from REST API, listeners, or they can be scheduled.
Nodes
REST Client
The REST Client flow node provides a simple and powerful way to access REST services. It can be used to directly invoke REST APIs or can use prebuilt configurations that define the APIs of the service. The node supports:
Terminals
The REST Client node supports the terminals as given in below table.

Flows
This documentation describes how Flows can be run from REST API, listeners, or they can be scheduled.
- Nodes
  - Maps
    A map node invokes a LNK map within a flow.
  - Flow
    A flow node invokes a sub flow within a flow. Sub-flows need not be wired to other nodes; it is valid to have a flow that is comprised of multiple sub-flows that each have listeners.
  - Source and Target
    Source and Target nodes provide Link with an outside-in approach to developing integrations. The inside-out approach means that you begin with a map, add inputs and outputs, and then configure these to access resources. Connections might be created in the process. The outside-in approach implements the integration from the opposite direction. You begin with the outside interfaces, then connects them to provide maps and other artifacts.
  - Cache Read and Write
    This documentation describes the function and use of the Cache Read and Cache Write nodes.
  - Clone
    The Clone node has one input and two output terminals. This node clones, or copies the input data from the single input terminal to both output terminals.
  - Decision
  - Fail
    Fails the flow execution.
  - Format Converter
    The Format Converter Node can be used to quickly convert data from one format to another.
  - JAVA
    Invokes a java class, performing user defined functionality based on the properties specified for the java class to act on the input.
  - Join
    The Join node gathers the individual results and appends to a single output file or terminal.
  - Log
    This node logs the raw data from the node input into the file and propagates the data from the input to the output terminal.
  - REST Client
    The REST Client flow node provides a simple and powerful way to access REST services. It can be used to directly invoke REST APIs or can use prebuilt configurations that define the APIs of the service. The node supports:
    - Functionality
      The REST Client node operates in 3 modes:
    - Terminals
      The REST Client node supports the terminals as given in below table.
    - Settings
      This section lists the settings available for the REST Client node.
    - Authentication
      Provides the options to authenticate the connection. This is an optional property.
    - Input Data Request Mode
      Input Data Request Mode is available, when you set Configuration Mode to Configuration Packages.
    - Request Assignments
      Provides a quick and easy way to build request data, when the request data is not provided to the node's input terminal.
    - Response Assignments
      Response Assignments are used to set flow variables based on values of elements of the response. This provides a simple way to parse responses to extract elements from the responses.
    - Logging
      Specifies the level of logging to use for the log (trace) file produced by the node.
  - Route
    The Route node provides a way to route data conditionally to one or more outputs of the node. The node bases decisions by evaluating a condition for a flow variable and determining whether to send the data to output 1 or 2 or both, based on the result of the condition.
  - Sleep
    This node suspends the execution of the flow for the specified number of milliseconds
  - Split
    A Split node should be used when there is a need to split csv data processing. This might occur when csv data processing becomes excessively time consuming. Such time-consuming behavior might occur when you send big csv data to the flow input terminal or it might become memory intense when complex data validation is being performed. The Split node can be used with these, and with other data processing tasks that can be done in parallel.
- Terminals
- Flow terminals
- Scheduled flows
- Listener
  A Flow that has a Map node as its first node, and uses a File adapter for an input, can enable that node's input to be a Watch.
- Flow audits
  Flow audits are a way to retrieve more verbose information about a flow instance.
- Flow variables
  Flow Variables are process data variables that go along with the flow execution, accessible to all nodes in the flow while it is being executed under flow executor/engine context.

Terminals

The REST Client node supports the terminals as given in below table.

Table 1. Terminals
Terminal	Direction	Description
Request data	In	The data sent as HTTP request.
Successful response	Out	The HTTP response for a successful request (HTTP status is 2xx).
Error response	Out	The HTTP response for an error condition (HTTP status is 4xx or 5xx).
Success	Out	Standard success terminal.
Error	Out	Standard error terminal. This terminal is invoked depends on whether the error response terminal is connected or not. If the error response is connected, the node fails, only if a processing error occurred. If the error response is not connected, this terminal is invoked, if either the node fails, or the HTTP call returns an error status.
Log	Out	The REST Client node log file is produced, if this terminal is connected.