Link to the Information Technology Laboratory Website Link to the Information Access Division Website Link to the NIST Website NIST, IAD Banner

NIST Data Flow System II - User's Guide - Draft Version

Table of Contents

1. Introduction
The NIST Smart Space Project
About this document
Contact information
2. Concepts
NIST Data Flow System II Introduction
Example of a multimodal application
Main components of the framework
Advantages of using a data flow
Optimized data transport
Language binding
Complex System simulations
3. Overview of supported hardware and signal processing libraries
Supported architectures
Supported operating systems
Supported sensor hardware
Supported flows
Supported libraries
4. Installation and requirements
Linux/Unix or Mac OS X
Windows XP
Checking your firewall
Testing your installation
Web Control Center Installation
5. How to create applications
The Smartflow class
Connecting to the NDFS-II network
Setting up an exit strategy for your client node
The Flow class
Creating a flow
Using a flow in your code
Stopping a flow
Checking the filling level of the queue
Avoiding blocking if no data is available
Pausing/Restarting a flow
Taking advantage of the Flows’ policies
Handling files
The Buffer class
The memcpy approach
The pushData/popData approach
Data Vs. Metadata
Combining an iterator with data and metadata
Creating your own metadata type
6. How to manage applications
Starting the data flow server
Starting client nodes
Overriding the connection ID of a flow
Overriding the client name
Additional client parameters
The Log System
Adding redirections to the log output
Changing the log severity
Enabling the Log redirection from threads
Using the log macro in your client node
7. Tools
The Control Center
Creating a client list
Creating an application map
Starting an application map
Using the discover application capability of the Control Center
Reading the map
Control Center's Hello World
The Flow Generator
The Client Descriptor
The Web Control Center
8. FAQ

Created on 2008-06-18 by Antoine Fillinger - Last updated on 2008-11-23 by Antoine Fillinger