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PEP#: 305
TITLE: VxWorks port

DESCRIPTION: Add readme file

Title: the OpenPegasus memory-resident repository
Date: 1 November 2007
Refernece: PEP 307

Overview

        The memory-resident repository is designed to be used primarily by embedded
        systems.  It has the following characteristics.
        
        1. The class repository is read-only and must be built and installed as part
        of the server startup.  There is no capability to add, modify, delete classes
        or qualifiers once the OpenPegasus server has been built.
        
        2. The instance repository is maintained in core and is fully read/write. The
        persistence of the instance repository is maintained through a set of callbacks
        that the system creator must create to save and restore the instance repository.

How to build the memory-resident class repository

The repository is built using the Pegasus compiler cimmofl.  Note that in the
memory-resident repository there is no capability to modify the class repository
subsequent to building the system so the complete class repository must be
compiled prior to building the system.

To build the memory-resident repository, first determine the CIM namespaces to be
used and the classes that will be included in each namespace.  

The complete set of classes and qualifiers for a single namespace must be compiled
with the OpenPegasus cimmofl compiler in a single call using the -m option on the
compiler to generate the C++ source output that represents the classes/qualifiers
to be compiled into the namespace.

Typically this means building a single mof file that represents the include of all
of classes and qualifiers for the target namespace.  The following is an example
of such a mof file, the root_PG_Internal-namespace.mof file

#pragma include("CIM2131/Core_Qualifiers.mof")
#pragma include("Pegasus/Internal/VER20/PG_InternalSchema20.mof")

The c++ source for that namespace is built with cimmofl using the -m option.

Within a Makefile the repository compile this can be defined as:

SCHEMAS=$(PEGASUS_ROOT)/Schemas
CIMMOFL=cimmofl -d -W -m

repository:
    @ $(CIMMOFL) root/PG_Internal -I $(SCHEMAS) root_PG_Internal_namespace.mof

   -m - generates memory-resident repository source files for the class and
        qualifier definitions.
   -d - TBD
   -W - Bypass the warning that you are using the cimmofl compiler

This builds all of the classes and qualifiers for the root/PG_Internal namespace
and outputs the result to the file root_PG_Internal_namespace.h and .cpp files
for installation into the embedded system.  

The input mof is contained in root_PG_Interlan_namespace.mof.  It is the
responsibility of the developer to encapsulate all of the mof required for this
namespace into the single input file.

NOTE: There is a working example of this build mechanism for VxWorks in the
directory

        pegasus/vxworks/cimserver