Issues for Mailing list of the Lightweight Fault Tolerance for Distributed Real-Time Systems Finalization Task

List of issues (green=resolved, yellow=pending Board vote, red=unresolved)

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Issue 16244: Some normative LwFT IDL files use TAO-specific macros. These need to be removed
Issue 16245: LwFT IDL files do not address CORBA 3.0 compilers with no support for #include directive
Issue 16246: Too many IDL files with no prefix that may conflict with application IDL

Issue 16244: Some normative LwFT IDL files use TAO-specific macros. These need to be removed (lwft-ftf)

BasicTypes.idl, Forwarding.idl and ServerReplicationManagement.idl Lwft IDL files from mars/2009-08-02 (machine readable files) contain TAO-specific macro and paths in the include section such as :

#ifdef __TAO_IDL

#include "tao/PI_Forward.pidl"

#include "tao/PI_Server/ServerRequestInfo.pidl"

#include "tao/PI/ClientRequestInfo.pidl"

#include "tao/PI/PIForwardRequest.pidl"

#endif

 

These should be removed and replaced by includes to standard CORBA 3.1 idl files from http://www.omg.org/spec/CORBA/3.1/20030102/.

The Lwft IDL files from mars/2009-08-02 (machine readable files) do not address CORBA 3.0 compilers as when _PRE_3_0_COMPILER_ macro is not defined.

See CORBA 3.1 idl files from http://www.omg.org/spec/CORBA/3.1/20030102/ that use 'import' and 'typeprefix' directives when _PRE_3_0_COMPILER_ is not defined.

 

Following CORBA 3.1 approach in http://www.omg.org/spec/CORBA/3.1/20030102/, the following is to be used:

#ifdef _PRE_3_0_COMPILER_

#include <PortableGroup.idl>

#include <PortableInterceptor.idl>

#include <TimeBase.idl>

#include <orb.idl>

#pragma prefix "omg.org"

#else

import ::CORBA;

import ::PortableGroup;

import ::PortableInterceptor;

import ::TimeBase;

typeprefix LWFT "omg.org"

#endif // _PRE_3_0_COMPILER_

There are so many Lwft IDL files from mars/2009-08-02 (machine readable files) and these do not contain any prefix to avoid conflicts with application IDLs (BasicTypes.idl for example may easily conflict with an application IDL).

 

We propose to follow approach used in CORBA 3.1 orb.idl file (in http://www.omg.org/spec/CORBA/3.1/20030102/orb.idl) and defined one single LWFT.idl to be included by application. The LWFT.idl is to to include all IDL files from mars/2009-08-02 previously prefixed by 'LWFT_'.

The LWFT_xxx.idl files will contain no include directives and no LWFT module (see attachement).

 

The following LWFT.idl will comply with above recommendations and will comly with post CORBA 3.0 compilers :

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// File: LWFT.idl

// From Lightweight Fault Tolerance

#ifndef _LWFT_IDL_

#define _LWFT_IDL_

 

#ifdef _PRE_3_0_COMPILER_

#include <PortableGroup.idl>

#include <PortableInterceptor.idl>

#include <TimeBase.idl>

#include <orb.idl>

#pragma prefix "omg.org"

#else

import ::CORBA;

import ::PortableGroup;

import ::PortableInterceptor;

import ::TimeBase;

typeprefix LWFT "omg.org"

#endif // _PRE_3_0_COMPILER_

 

// This module brings together many files defining the LWFT module.

// It describes interfaces and data types of the Lightweight fault

// tolerance that can be brought into an IDL compilation by "import ::LWFT"

// or in pre-3.0 IDL compilers by the include directive

//   "#include <LWFT.idl>".

module LWFT {

 

// Basic type definitions

#include <LWFT_BasicTypes.idl>

 

// ClientFailoverSemanticsPolicy type and value

#include <LWFT_ClientFailoverSemanticsPolicy.idl>

 

// Contrain FT Current interface

#include <LWFT_Current.idl>

 

// Naming schemes for Object Groups

#include <LWFT_ObjectGroupNames.idl>

 

// ObjectGroupMembershipPolicy type and value

#include <LWFT_ObjectGroupMembershipPolicy.idl>

 

// ObjectGroupNameResolutionPolicy type and value

#include <LWFT_ObjectGroupNameResolutionPolicy.idl>

 

// interfaces for Process-level replication and process groups

#include <LWFT_ServerReplicationManagement.idl>

 

// Locators, ObjectKey decoders for the Forwarding framework

#include <LWFT_Forwarding.idl>

 

};

 

#endif // _LWFT_IDL_

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