[PPT] - PLUG PLUG Presentation Layer Universal Generator Presentation PowerPoint Presentation

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PLUG PLUG

Presentation Layer Universal Generator Presentation Layer Universal Generator

P&D/CSD/DCE P&D/CSD/DCE-

TFP/AST

TFP/AST

A joint company of Thomson-CSF Airsys and Siemens

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OVERVIEW

Compiler & Parser PLUG (Presentation Layer Universal Generator) through

applications :

Coder generation : Object Message Passing

System specifications : IRS CORBA Migration Plug Integration Mock-Up PLUG Performances

* PATIO : Platform for ATM Tools Integration to Pre-operation

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Specification Language

Network

Node A Node B

IRS (IDL)

Struct message1 Item1 : short; Item2 : long; Item3 : char; Item4 : Boolean; Item4 : Struct data Item1 : :char; Item2 : long; Item3 : char; Item4 : Boolean Item4 : char; end struct data; end struct message1

Communication Language Programming Language (C++) Programming Language (Ada)

Communication Object Design

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Syntax and Language

Abstract Syntax : specification language :

ASN.1, IDL, (ADA)

Working Syntax : programming language :

ADA, C, C++

Transfert (concrete) Syntax : communication

language :

BER/PER, XDR, CDR, ASTERIX, ADEXP, ICAO

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PLUG Compilers

ABSTRACT SYNTAX

PLUG Ada RPC : API
PLUG ASN.1 : ATN
PLUG IDL : CORBA

Front End (FE)

TRANSFERT SYNTAX

PLUG XDR : API
PLUG BER/PER : ATN
PLUG CDR : CORBA, ESIOP

Back End (BE)

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PLUG Parsers

PLUG ASTERIX :

Radar, Meteo, Categorie XX

PLUG ADEXP :

Flight Plan, ATS, AIS, CFMU, IFPS,

OLDI

PLUG ICAO :

Flight Plan, ATS, OLDI, ...

Tracks

Primary and secondary RADAR

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XDR

Stub Generator Coder Generator C Ada Ada API C Ada

PLUG : Presentation Layer Universal Generator

(IDL)

(CDR) (IDL, C++)

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PLUG Coder generator

IFF

XDR/C generated encoding source files

Front End (lex/yacc)

Back End XDR/ADA generated encoding source files Ada Grammar (BNF) grammar analyze grammar analyze XDR Templates expansion XDR Templates expansion XDR Templates (TDL)

Ada API

Independant Format File Independant Format File Abstract Syntax Tree

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Object message passing with PLUG

UBSS manages pipes not the semantic of

transported messages

PLUG Coder are used to manage FIFO and CDC

messages.

Ada type specification is used as Specification

input file (AS)

IRS documents are replaced by Ada specification

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Plug coder use : FIFO encode/decode

FIFO Enqueue Dequeue

Type A Type B Type Simple 1 Type Simple 2 End Type B Type C Type Simple 1 Type Simple 3 Type D Type Simple 3 Type Simple 2 End Type D End Type C End Type A Type A Type B Type Simple 1 Type Simple 2 End Type B Type C Type Simple 1 Type Simple 3 Type D Type Simple 3 Type Simple 2 End Type D End Type C End Type A

Type Ada Type C

Ada XDR XDR C Call Back encoding routing

XDR buffer

Tools User Tools User

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Plug coder use : CDC encode/decode

Ada XDR XDR C

Type A Type B Type Simple 1 Type Simple 2 End Type B Type C Type Simple 1 Type Simple 3 Type D Type Simple 3 Type Simple 2 End Type D End Type C End Type A Type A Type B Type Simple 1 Type Simple 2 End Type B Type C Type Simple 1 Type Simple 3 Type D Type Simple 3 Type Simple 2 End Type D End Type C End Type A

Type Ada Type C

Call Back encoding routing

CDC CDC_write() CDC_read()

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Ada CSCI C CSCI XDR Ada Compiler C Compiler

XDR : How it works.

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C/XDR Coder (C)

Struct Message Type 1 Field A Field B Field C Field D Field E Field F Field G Field H Field I End struct Message Type1

C structure

Field 1 Field 2 Field 3 Field 4 Field 5 Field 6 Field 7 Field 8 Field 9

XDR Stream Ada/XDR Coder (Ada)

Struct Message Type 1 Field A Field B Field C Field D Field E Field F Field G Field H Field I End struct Message Type1

Ada structure

Interface Specification Abstract Syntax Transfert Syntax Programming Syntax Programming Syntax

Object Message Passing Syntax

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Coder : Structure Serialization

Struct Message Type 1 Field A Field B Field C Field D Field E Field F Field G End struct Message type1

Ada or C structure

XDR Stream XDR Convertor

Elementary types are : Int, Char, float, Boolean Field 1 Field 2 Field 3 Field 4 Field 5 Header Type 1 A B C D E F G

Expansion : according to Data Types : 10 % to 20 %, XDR compress, 0,6 to 0,8 % according to data values

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C/XDR Coder

Struct Message Type 1 Field A Field B Field C Field D Field E Field F Field G Field H Field I End struct Message Type1

C structure

Field 1 Field 2 Field 3 Field 4 Field 5 Field 6 Field 7 Field 8 Field 9

XDR Stream Ada/XDR Coder

Struct Message Type 1 Field A Field B Field C Field D Field E Field F Field G Field H Field I End struct Message Type1

Ada structure

Interface Specification C/XDR Coder Generator Ada to C Translator Ada/XDR Coder Generator Ada Package Specification (With)

Code generation output

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PLUG Generated Files

PLUG/XDR generates 5 Files : ADA :

1. Coder specification (.ads)
2. Coder body (.adb)

C :

3. API header file (.h)
4. Coder specification (.h)
5. Coder body (.c)

The Ada API header file (specification) is the API

specification itself.

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PLUG Generated Files

Ada API

.h .h .c .c .ads .ads .h .h .ads .ads .adb .adb

1 2 4 5 3 Ada and C structure Ada and C XDR Coder =

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Ada Program C Program XDR format disk file

PUT (Ada Type) GET ( Ada Type) read (C Type) write (C Type)

Plug coder use : Off line file universal format

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C/XDR Coder

Struct Message Type 1 Field A Field B Field C Field D Field E Field F Field G Field H Field I End struct Message Type1

C structure

Field 1 Field 2 Field 3 Field 4 Field 5 Field 6 Field 7 Field 8 Field 9

XDR Stream C/XDR Coder

Struct Message Type 1 Field A Field B Field C Field D Field E Field F Field G Field H Field I End struct Message Type1

C structure C/XDR Coder

Struct Message Type 1 Field A Field B Field C Field D Field E Field F Field G Field H Field I End struct Message Type1

C structure

Field 1 Field 2 Field 3 Field 4 Field 5 Field 6 Field 7 Field 8 Field 9

XDR Stream Ada/XDR Coder

Struct Message Type 1 Field A Field B Field C Field D Field E Field F Field G Field H Field I End struct Message Type1

Ada structure Ada/XDR Coder

Struct Message Type 1 Field A Field B Field C Field D Field E Field F Field G Field H Field I End struct Message Type1

Ada structure

Field 1 Field 2 Field 3 Field 4 Field 5 Field 6 Field 7 Field 8 Field 9

XDR Stream Ada/XDR Coder

Struct Message Type 1 Field A Field B Field C Field D Field E Field F Field G Field H Field I End struct Message Type1

Ada structure

Coder context

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Plug other possible applications

Symbolic trace and debug functions

Complex structure symbolic dump

Programming Language Translator

Ada to C, Ada to C++ Ada to IDL (CORBA Migration)

Off line and recording files management

XDR standard file format

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IFF

IDL Front End

CORBA IDL

PLUG modularity

ADa Front End

Ada API

ASN.1 Front End

ASN.1

CDR Back End CDR generated encoding source files XDR Back End XDR generated encoding source files BER/PER BE BER/PER generated encoding source files

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System Specifications : IRS

System IRS

Programming Types

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IRS = Ada specifications = Common

Radar Data Processing Radar Data Processing Flight Plan Processing Flight Plan Processing Controler Working Position Controler Working Position Radar Front Processing Radar Front Processing

Dual LAN FDDI AFTN/CIDIN ATFM ADJACENT FIR'S/TWR'S MET Centres RADAR

Controler Working Position Controler Working Position

System IRS (Ada)

Ada C, C++, Java

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CORBA MIGRATION : Ada To IDL translator System IRS ADA

System IRS IDL

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ESIOP

Time Time Event Event Life Cycle Life Cycle

Persistency Persistency

TP CP Secto

Flight

.......

ORB

CORBA

Radar Data Processing Radar Data Processing Flight Plan Processing Flight Plan Processing Controler Working Position Controler Working Position Radar Front Processing Radar Front Processing

Dual LAN FDDI AFTN/CIDIN ATFM ADJACENT FIR'S/TWR'S MET Centres RADAR

Controler Working Position Controler Working Position

Ada C, C++, Java

APPLICATION (Ada) UBSS IIOP GIOP

IIOP

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PLUG Integration Mock-Up

ODS FPL IDENT CDCDB

CDC CDC CDC CDC

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Mock-up Scenario

Use Plug for FPL CDC Keep others CDC Adapt ODS for FPL Types Perform Test and Performances

Evaluation Evaluate Adaptation Effort for all CDCs

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PLUG Performances

Usual Case : C Structure to XDR strings : 10 to 20 % XDR compress : 3200 Bytes = 2100 Bytes at 0,05 ms FPL CDC structure :

Current size : 2460 Bytes
Common FPL Ada record XDR Strings : 3250 Bytes
Expansion : 33 %

FPL Encoding duration : 195 micro seconde