[mapguide-users] Map Layers Transferring Between Users

Thu Jul 26 12:36:58 EDT 2007

Hi Paul - 

Thanks for the ideas.  My code was based on the developer guide / shebogoyan sample code provided with the install.
More or less I took the sample code, modified it for my use to get one layer to show up, then cloned the functionality to get it to work for several layers.  There is one big difference between the sample program and what I've written, namely that due to problems with filtering on a layer w/PostGIS, I am querying an existing feature of points, getting the lat long, and then creating points on the fly using those values, creating new layers based on the properties of each point, and putting the layers back into the repository.  

I'm not sure I am explicity cloning a feature from the library and associating it into the session or not.  

(Apologies in advance for this being so long winded)

At a high level, here is what I'm doing:

1) Collecting user input.
2) Identifying records in the db that fit the users selection criteria.  These records have lat long and geometry associated with them.
3) Create a resource service:
		$resourceService = $siteConnection->CreateService(MgServiceType::ResourceService);

3) Create a feature service for each type of point / layer I need to create:
	$routeFeatureService = $siteConnection->CreateService(MgServiceType::FeatureService);

4) Open the map.
5) Create a class definition for each type of point / layer I need to create. 
6) Define class properties for each class created. 
7) Create a feature schema for each class, and associating the class definition to it. 
	$routeFeatureSchema = new MgFeatureSchema($routeSchemaName, "Point schema for Routes");
	$routeFeatureSchema->GetClasses()->Add($routeClassDefinition);
8) Creating resource identifiers:
	$routeFeatureSourceName = 'Library://COT_WebViewer/BaseMap/Data/PostGisData.FeatureSource';
	$routeResourceIdentifier = new MgResourceIdentifier($routeFeatureSourceName);

Here, I am using the 'Library:' prefix, but it seems to be necessary.  (?)  If I don't put a valid path, but try 'Session:' instead, it bombs out. 
9) Creating sdf parameters
	$sdfParams =   new MgCreateSdfParams("ArbitraryXY", $wkt, $routeFeatureSchema);
10) Creating a new feature source:
	$routeFeatureService->CreateFeatureSource($routeResourceIdentifier, $sdfParams);

	*? Do I need to perform an additional operation at this point to have the resultant feature source associated with the session only?*

11) Looping through database results, create points of appropriate types, add them to property collections. 
12) Adding the property collections to the feature source:

		 $cmd = new MgInsertFeatures($routeClassDefName, $routeBatchPropertyCollection);
		 $routeFeatureCommandCollection = new MgFeatureCommandCollection();
		 $routeFeatureCommandCollection->Add($cmd);
		 $routeFeatureService->UpdateFeatures($routeResourceIdentifier, $routeFeatureCommandCollection, false);

		? Is this final call modifying the features in the library and not the session?

13) Create a new layer definition, and layer resource.  Add the layer resource to the map. 
14) Save the map back to the session repository:

    $sessionIdName = "Session:".$sessionId."//COT_Utilities.Map";
    $sessionResourceID = new MgResourceIdentifier($sessionIdName);
    $sessionResourceID->Validate();
    $map->Save($resourceService, $sessionResourceID);

Any and all insight is appreciated!

-pD

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org]On Behalf Of Paul Spencer
Sent: Thursday, July 26, 2007 11:11 AM
To: MapGuide Users Mail List
Subject: Re: [mapguide-users] Map Layers Transferring Between Users

Hi pD,

it sounds as if you are modifying something in the Library:// rather  
than making a copy in the Session:// and modifying it there (either  
your Layer or FeatureSource I'd guess).  Perhaps you could describe  
what the code does (in general terms) and we might be able to point  
out where you should be using the Session instead.

Cheers

Paul

On 25-Jul-07, at 4:23 PM, passionlessDrone wrote:

>
> Hello friends -
>
> We've created a piece to dynamically add layers and points based on  
> human
> input.  If the user submits input for which there is no matching  
> criteria,
> we make no modifications to the map, but I still call
> GetMapFrame().Refresh().   Great.  However, if two humans are  
> running the
> report, the following can happen:
>
> 1) User A runs a report with successful criteria that returns with  
> points
> and new layers.  They are displayed correctly on the map at refresh  
> time.
> 2) User B runs a report with successful criteria that returns with  
> points
> and new layers.  They are displayed correctly on the map at refresh  
> time.
> 2) User A runs a report without succesful crieteria that makes no
> modifications to the base map.
> 3) User A's map refreshes, and he sees the new layers / points that  
> User B
> sees.
>
> User A and User B are logged in as separate entities and debugging  
> validates
> that they have separate session id values.   The layer names are  
> the same
> between the two users.
>
> I suppose I could just write something that when no criteria match  
> I get the
> map, get the layers, and strip out any that fit the criteria that  
> the layers
> that he 'shouldn't' see, but this is more like hiding the problem than
> understanding it and fixing it.  I guess I'm also not sure if this  
> might
> impact another user.
>
> Any insight is greatly appreciated!
>
> -pD
>
>
> -- 
> View this message in context: http://www.nabble.com/Map-Layers- 
> Transferring-Between-Users-tf4147718s16610.html#a11799272
> Sent from the MapGuide Users mailing list archive at Nabble.com.
>
> _______________________________________________
> mapguide-users mailing list
> mapguide-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapguide-users

+-----------------------------------------------------------------+
|Paul Spencer                          pspencer at dmsolutions.ca    |
+-----------------------------------------------------------------+
|Chief Technology Officer                                         |
|DM Solutions Group Inc                http://www.dmsolutions.ca/ |
+-----------------------------------------------------------------+

_______________________________________________
mapguide-users mailing list
mapguide-users at lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/mapguide-users

************************************************************************************
This footnote confirms that this email message has been scanned by
PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses.
************************************************************************************