[omniORB] The Simple example not working :0)

[Laurent JOIGNY]

Hi,

I am a new user of omniORB and I tried to run a simple example
of a time server. All goes well until I decide to add some spicy
stuff like sequence.

First of all my problem was at the compilation stage, when I try to
assign an element of a vector to an element of my sequence.
It seems that the _this() operation was enough to solve the problem,
but at the execution stage my server stop in this portion of code.

If somebody has an idea, I would be glad to hear it.

I read some of other issues on the list archive but I didn't find my
answer. Any way I thing that a bigger example of omniORB use, with sequence,
should be present in the product archive.

Server Execution:
-----------------
Get ORB reference
Get the POA reference
Create and activate the TimeImpl object
Start the POA manager
Stringify the TimeImpl reference
Running ORB...

Begin get_items
itemList size = 3
New sequence created
Copy an item

Client Execution:
------------------
Starting the server
Get ORB reference
Destringify the Object reference
Get a Time object from the reference
Use the time service
Time in GreenWich is 21:13:17
Get a list of item and display it
ERROR IN THE CLIENT


IDL:
-----
module TIDL {
	interface Item {
		attribute string name;
	};
	typedef sequence<Item> ItemSeq;
	struct TimeOfDay {
		short hour;
		short minute;
		short second;
	};
	interface Time {
		TimeOfDay get_gmt();
		ItemSeq get_items();
	};
};

Servant code: timeImpl.cc
-------------------------
using namespace TIDL;

class ItemImpl : public POA_TIDL::Item,
	public PortableServer::RefCountServantBase
{
public :
	ItemImpl(char *n) { strcpy(d_name, n); };
	virtual char *name() { return d_name; };
	virtual void name(const char *n) { strcpy(d_name, n); };

	char d_name[50];
};

class TimeImpl : public POA_TIDL::Time,
	public PortableServer::RefCountServantBase
{
public :
	virtual TimeOfDay get_gmt();
	virtual ItemSeq*  get_items();

	vector<ItemImpl> itemList;
};

TimeOfDay TimeImpl::get_gmt()
{
     TimeOfDay tod;
     ... etc ..
     return tod;
}

ItemSeq*  TimeImpl::get_items()
{
	cerr<<"Begin get_items"<<endl;
	int len = itemList.size();
	cerr<<"itemList size = "<<len<<endl;
	ItemSeq* seq = new ItemSeq(len);
	cerr<<"New sequence created"<<endl;

	for (int i=0; i<len; i++)
	{
		cerr<<"Copy an item"<<endl;
		(*seq)[i] = itemList[i]._this();   // FIXE ME !!
	}

	cerr<<"End get_items"<<endl;
	return seq;
}

Server code: timeImpl.cc
------------------------
int main(int argc, char * argv[])
{
	... etc...
	TimeImpl *mytime = new TimeImpl();

	ItemImpl item = ItemImpl("A");
	mytime->itemList.push_back( item );
	item.name("simple");	
	mytime->itemList.push_back( item );
	item.name("test");
	mytime->itemList.push_back( item );
	
	PortableServer::ObjectId_var mytimeid = poa->activate_object(mytime);

	Time_var mytimeref = mytime->_this();
	mytime->_remove_ref();

	... etc ...
}

Client code:
------------
int main(int argc, char * argv[])
{
	... etc ...
	cerr<<"Get a Time object from the reference"<<endl;
	Time_var tm = Time::_narrow(obj);
	if (CORBA::is_nil(tm)) {
		cerr<<"Argument is not a Time reference"<<endl;
		throw 0;
	}

	// Get time
	cerr<<"Use the time service"<<endl;
	TimeOfDay tod = tm->get_gmt();
	... etc ...
	
	cout<<"Get a list of item and display it "<<endl;
	ItemSeq *seq = tm->get_items();
	cout<<"List taken"<<endl;
	int len2 = seq->length();
	for (int i=0; i<len2; i++)
	{
		cout<<(*seq)[i]<<" ";
	}

	... etc ...
}


--
Laurent JOIGNY
WesternGeco / Schlumberger / Houston
phone : (+1) 713 689 6646