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File: [Pegasus] / pegasus / test / TestProviders / MultithreadingTests / README (download)
Revision: 1.5, Tue Dec 16 18:58:16 2008 UTC (15 years, 6 months ago) by kumpf
Branch: MAIN
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DESCRIPTION: Remove meaningless whitespace.

//%LICENSE////////////////////////////////////////////////////////////////
//
// Licensed to The Open Group (TOG) under one or more contributor license
// agreements.  Refer to the OpenPegasusNOTICE.txt file distributed with
// this work for additional information regarding copyright ownership.
// Each contributor licenses this file to you under the OpenPegasus Open
// Source License; you may not use this file except in compliance with the
// License.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//////////////////////////////////////////////////////////////////////////
Multiple threads creation Test
------------------------------

The source files present in this directory implements a test case for checking
provider behaviour when new sub-processes are created from inside the provider
methods.
Source programs included:
MultithreadingSampleProviderMain.cpp
MultithreadingSampleProvider.cpp
MultithreadingSampleProvider.h
MultithreadingSampleProvider.mof - MultithreadSampleClass MOF
MultithreadingSampleProviderR.mof - Provider Registration MOF

build
-----
This script builds the MultithreadingSample provider sources, registers the
classes into the CIM repository and registers the provider(by compiling the 2
mof files using cimmofl).
It also stops and restarts the cimserver in order to re-read the repository to
make sure that new classes are registered.

-------------------------------------------------------------------------------
The implementation is done in the following manner:

1. MultithreadingSampleProviderMain.cpp is the source file which contains the
provider entry point routine.

2. MultithreadingSampleProvider.cpp [h] are the main provider sources that
implement the MultithreadingSampleClass.

3. The Base class has 3 derived classes called ThreadSampleOne, ThreadSampleTwo
and ThreadSampleThree.

4. ThreadSampleOne class instances are created inside the enumerateInstances
method of the provider. After the instances creation this method calls
explicitly the CreateThread function, which spawns a new sub-process and
executes the command line cim client CLI.

5. The additional functions added in the provider source program other than the
standard methods are:
CreateThread() - Function creating the sub-process (by using fork())
reader() - child process reads from the input stream
writer() - Parent process writing to the output stream

This test program is currently tested only on Linux and AIX (on x86 arch.).
It might not be working on non-unix platforms because of the usage of platform
specific system calls like fork(), and sleep();

The parent process after writing to the output stream sleeps in the function
writer() which makes the CLI command give a timeout error.

TEST the Provider Working
-------------------------

1. Run the following command for checking the working of this provider:

CLI niall -n root/SampleProvider ThreadSampleOne

2. Run "TestClient" program present in the pegasus sources (to check for the
new classes registered by any new providers) as follows:
	TestClient --n root/SampleProvider
[You need to make sure that the TestClient is run for the SampleProvider
repository because by default it runs only for root/cimv2]


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