&| '''What''': | ''libmsgque'' |&
&| '''Intro''': | https://nhi1.selfhost.co/nhi1/libmsgque/libmsgqueref.htm|&
&| '''Tcl''': | https://nhi1.selfhost.co/nhi1/tclmsgque/tclmsgqueref.htm|&
&| '''Home''': | https://nhi1.selfhost.co |&
&| '''Description''': | The ''libmsgque'' project is an [infrastructure] for linking applications together to act like a single [application]. |&
&| '''Updated''': | 25 feb 2021 (version: 8.0, all planned tasks are finished) |&
&| '''Contact''': | mailto:aotto1968@t-online.de  (Andreas Otto) |&

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''libmsgque'' is part of the '''[NHI1]''' project and provide the connectivity toolkit with the main goal to 
serve as bridge between an '''[API]''' and a '''programming toolkit''' 

***API***

near all [application] toolkits offering an ''[API]'' to give
the user a chance to integrate the [application] toolkit into the local
environment. example:
   * [Database]s (by [Oracle], [Sybase], [Microsoft], [IBM], ...)
   * [Application] [Framework]s (by SAP, [Oracle], Peoplesoft, Remedy, ...)
   * System Management Tools (by [IBM], [HP], Free/Share/Open - Ware, ...)

***programming toolkit***

a programming toolkit serve as an interface between the human and the
computer. The human create input, knows as source-code, to instruct
the computer to do complex work. example:
   * [tcl], [perl], [python], [ruby], [php] (known as scripting languages)
   * [java], [C#], [go], [VB.Net] (known as application framework languages)
   * [C], [C++] (known as system programming languages)

***libmsgque***

''libmsgque'' acts as a bridge between a programming toolkit and an [API]:

  >>>>>>>>>>>>>>> REQUEST >>>>>>>>>>>>>>

  |     | ---> |           | ---> |     |
  | Tcl |      | libmsgque |      | API |
  |     | <--- |           | <--- |     |

  <<<<<<<<<<<<<<<< ANSWER <<<<<<<<<<<<<<

A REQUEST will be submitted with ''libmsgque'' from the ''programming toolkit''
to the ''[API]'' and the ANSWER will be send back. 
the advantage of ''libmsgque'' is:
   1. the ''programming toolkit'' and the ''[API]'' were separated into '''independent''' processes
   2. the interface between the ''[API]'' and ''libmsgque'' is independent from the interface between the ''programming toolkit'' and ''libmsgque''
   3. the interface between the ''programming toolkit'' and ''libmsgque'' is '''only''' written with the ''programming toolkit'' '''language''' (example: [Tcl], '''no''' [C] knowledge required)

***link to Tcl***

   * [tclmsgque] is an Tcl extension using ''libmsgque''
   * [Andreas Otto] wrote [libmsgque] and [tclmsgque]


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