multithreadingsampleprovider.cpp

Pegasus is an open-source implementationof the DMTF CIM and WBEM standards. It is designed to be por

//%2006////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation, The Open Group.
// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; Symantec Corporation; The Open Group.
//
// 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.
//
//==============================================================================
//
// Author: Subodh Soni IBM Corporation, ([e-mail])
//
// Modified By:
//             
//             
//
//%////////////////////////////////////////////////////////////////////////////

#include <stdio.h>
#include <iostream>
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include "MultithreadingSampleProvider.h"
#include <Pegasus/Common/Config.h>
#include <Pegasus/Common/Constants.h>
#include <Pegasus/Common/CIMDateTime.h>
#include <Pegasus/Common/InternalException.h>

#define NO_OF_INSTANCES	5

PEGASUS_NAMESPACE_BEGIN
PEGASUS_USING_STD;

void writer (const char* message, int count, FILE* stream)
{ 
		for (; count > 0; --count) {
		// Write the message to the stream, and send it off immediately.
			fprintf (stream,"%s\n" , message);
			fflush (stream);
		// Sleeping for a long time in the writer thread so as to get a timeout
		// when CLI is executed from inside the reader thread
		sleep (100);
		}
}

void reader (FILE* stream)
{
	char buffer[1024];
	// Read until we hit the end of the stream. fgets reads until either
	// a newline or the end-of-file.
	while (!feof(stream) 
		&& !ferror(stream) 
		&& fgets(buffer, sizeof(buffer), stream) != NULL)
		fputs (buffer, stdout);
}

int CreateThreads()
{ 
	char* arg_list[] = {
			"CLI",
			"niall",
			"-n",
			"root/SampleProvider",
			NULL
	};
	int fds[2];
	pid_t cpid;

	pipe(fds);

	cpid = fork();
	if (cpid == (pid_t)0)
	{ 
		FILE* stream; 
		// This is the child process. Close our copy of the write end
		// of the file descriptor.
		close(fds[1]);
		// Connect the read end of the pipe to standard input.
		dup2(fds[0], STDIN_FILENO);
		// Convert the read file descriptor to a FILE object, and read from it
		stream = fdopen(fds[0],"r" );
		reader(stream);
		close(fds[0]);
		// Replace the child process with the CLI program 
		execvp ("CLI", arg_list);
	}
	else
	{
		FILE* stream;
		// Close our copy of the read end of the file descriptor.
		close (fds[0]);
		// Convert the write file descriptor to a FILE object,and write to it.
		stream = fdopen(fds[1],"w" );
		
		writer("Test Writer from Parent process\n", 2, stream);
		close (fds[1]);
		// Wait for child process to finish
		waitpid(cpid, NULL, 0);
	}
	return 0;
}

MultithreadingSampleProvider::MultithreadingSampleProvider(void)
{
}

MultithreadingSampleProvider::~MultithreadingSampleProvider(void)
{
}

void MultithreadingSampleProvider::initialize(CIMOMHandle & cimom)
{
    cout <<" MultithreadingSampleProvider::initialize" << endl;
}

void MultithreadingSampleProvider::terminate(void)
{
    cout <<" MultithreadingSampleProvider::terminate" << endl;
}

void MultithreadingSampleProvider::getInstance(
	const OperationContext & context,
	const CIMObjectPath & instanceReference,
	const Boolean includeQualifiers,
	const Boolean includeClassOrigin,
	const CIMPropertyList & propertyList,
	InstanceResponseHandler & handler)
{
	CIMObjectPath localReference = CIMObjectPath(
		String(), 
		String(),
		instanceReference.getClassName(),
        instanceReference.getKeyBindings());

	CIMName className = instanceReference.getClassName();
	cout << "className (Method: getInstance) " << className.getString() << endl;
    CIMNamespaceName nameSpace = instanceReference.getNameSpace();

    cout << "[className: " << className.getString()<< "], [in namespace: " << nameSpace.getString() << 
			"] " << endl;
	// instance index corresponds to reference index
	for(Uint32 i = 0, n = _instances.size(); i < n; i++)
    {
        if(localReference == _instanceNames[i])
	        {
		    // deliver requested instance
		    handler.deliver(_instances[i]);
		    break;
	        }
	    }
	// complete processing the request
	handler.complete();
}

void MultithreadingSampleProvider::enumerateInstanceNames(
	const OperationContext & context,
	const CIMObjectPath & classReference,
	ObjectPathResponseHandler & handler)
{
	cout << "MultithreadingSampleProvider::enumerateInstancesNames" << endl;	
	// begin processing the request
	handler.processing();
	
    for(Uint32 i = 0, n = _instances.size(); i < n; i++)
    // deliver instance
    	handler.deliver(_instanceNames[i]);
	// complete processing the request
	handler.complete();
}

void MultithreadingSampleProvider::enumerateInstances(
	const OperationContext & context,
	const CIMObjectPath & classReference,
	const Boolean includeQualifiers,
	const Boolean includeClassOrigin,
	const CIMPropertyList & propertyList,
	InstanceResponseHandler & handler)
{
	int retval;
	char buffer[NO_OF_INSTANCES];
	CIMInstance Instances[NO_OF_INSTANCES];
	CIMObjectPath References[NO_OF_INSTANCES];

	cout << "MultithreadingSampleProvider::enumerateInstances" << endl;	
	cout << "_instances.size = " << _instances.size() << endl;

	
	// begin processing the request
	handler.processing();

	CIMName clName = classReference.getClassName();
	String className = clName.getString();
	cout << "className = " << className<< endl;

	for (Uint32 i = 0; i < NO_OF_INSTANCES; i++)
    {
    	sprintf(buffer, "%d", i);
	    Instances[i] = CIMInstance("ThreadSampleOne");
    	References[i] = CIMObjectPath("ThreadSampleOne.Id="+String(buffer));

	    Instances[i].addProperty(CIMProperty("Id", Uint16(i)));
		Instances[i].addProperty(CIMProperty("Message", String(buffer)));


	_instances.append(Instances[i]);
    _instanceNames.append(References[i]);

	}
	retval = CreateThreads();
	cout << "Return from CreateThreads" << retval << endl;

	for(Uint32 i = 0, n = NO_OF_INSTANCES; i < n; i++)
	// deliver reference
		handler.deliver(_instances[i]);

	// complete processing the request
	handler.complete();
}

void MultithreadingSampleProvider::modifyInstance(
	const OperationContext & context,
	const CIMObjectPath & instanceReference,
	const CIMInstance & instanceObject,
	const Boolean includeQualifiers,
	const CIMPropertyList & propertyList,
	ResponseHandler & handler)
{
	cout << "MultithreadingSampleProvider::modifyInstance" << endl;	
	// convert a potential fully qualified reference into a local reference
	// (class name and keys only).
	CIMObjectPath localReference = CIMObjectPath(
		String(),
		String(),
		instanceReference.getClassName(),
		instanceReference.getKeyBindings());

	// begin processing the request
	handler.processing();

	// instance index corresponds to reference index
	for(Uint32 i = 0, n = _instances.size(); i < n; i++)
	{
		if(localReference == _instanceNames[i])
		{
			// overwrite existing instance
			_instances[i] = instanceObject;

			break;
		}
	}
	// complete processing the request
	handler.complete();
}

void MultithreadingSampleProvider::createInstance(
	const OperationContext & context,
	const CIMObjectPath & instanceReference,
	const CIMInstance & instanceObject,
	ObjectPathResponseHandler & handler)
{
	cout << "MultithreadingSampleProvider::createInstance" << endl;	
	// convert a potential fully qualified reference into a local reference
	// (class name and keys only).
	CIMObjectPath localReference = CIMObjectPath(
		String(),
		String(),
		instanceReference.getClassName(),
		instanceReference.getKeyBindings());

	// instance index corresponds to reference index
	for(Uint32 i = 0, n = _instanceNames.size(); i < n; i++)
	{
		if(localReference == _instanceNames[i])
		{
			throw CIMObjectAlreadyExistsException(
                                  localReference.toString());
		}
	}

	// begin processing the request
	handler.processing();

	// add the new instance to the array
	_instances.append(instanceObject);
	_instanceNames.append(instanceReference);

	// deliver the new instance
	handler.deliver(_instanceNames[_instanceNames.size() - 1]);

	// complete processing the request
	handler.complete();
}

void MultithreadingSampleProvider::deleteInstance(
	const OperationContext & context,
	const CIMObjectPath & instanceReference,
	ResponseHandler & handler)
{
	cout << "MultithreadingSampleProvider::deleteInstance" << endl;	
	// convert a potential fully qualified reference into a local reference
	// (class name and keys only).
	CIMObjectPath localReference = CIMObjectPath(
		String(),
		String(),
		instanceReference.getClassName(),
		instanceReference.getKeyBindings());

	// begin processing the request
	handler.processing();

	// instance index corresponds to reference index
	for(Uint32 i = 0, n = _instances.size(); i < n; i++)
	{
		if(localReference == _instanceNames[i])
		{
			// save the instance locally
			CIMInstance cimInstance(_instances[i]);

			// remove instance from the array
			_instances.remove(i);
			_instanceNames.remove(i);

			// exit loop
			break;
		}
	}

	// complete processing the request
	handler.complete();
}

PEGASUS_NAMESPACE_END