[mapguide-users] gettile method problems

[Kenneth Skovhede, GEOGRAF A/S]

I'm guessing here, but the "ToFile" is actually using the stream, and 
disposing it (eg. reading it).
If you do not read the contents of the stream, the server will keep the 
stream open, and
the data in memory.

You can try to use the Dispose() or similar call instead.

Regards, Kenneth Skovhede, GEOGRAF A/S



alucas skrev:
> My version is MGOS 2.0.2
>
> I'm not sure if I understand your second question Zac. When I call GetTile
> method, the server also store this tiles in the TileCache directory. My
> problem is when I only call GetTile method without store the returned tiles
> in some directory. I don't know what is the reason, but if in every call to
> GetTile I store the returned tile, the server service seems does not
> crashes...
>
> My first priority is to know what is going on... I don't know why several
> calls to GetTile return the exception.
>
> Thanks.
>
>
> zspitzer wrote:
>   
>> which version are you running? that always helps to mention it:)
>>
>> you could just copy the tile cache?
>>
>>
>> C:\Program Files\MapGuideOpenSource2.0\Server\Repositories\TileCache
>>
>> On Tue, Dec 9, 2008 at 4:14 AM, alucas <alucas at srtec.com> wrote:
>>     
>>> Hello Kenneth,
>>>
>>> If after call GetTile I write the tile in a temporary directory, then the
>>> service does not goes down. Strange behaviour...
>>>
>>> Now my code looks something like this:
>>>
>>> for (int s = scaleCount -1; s >=0; s--)
>>> {
>>>  // nTilesX and nTilesY calculation
>>>  // ...
>>>
>>>  for (int r = 0; r <= nTilesX; r++)
>>>  {
>>>     for (int c = 0; c <= nTilesY; c++)
>>>     {
>>>            MgByteReader br = ts.GetTile(mapResId, layerGroup, c, r, s);
>>>            MgByteSink bs = new MgByteSink(br);
>>>            bs.ToFile(@"c:\Temp\s"+ s.ToString() +"_r"+r.ToString()+"_c"+
>>> c.ToString()+".jpg");
>>>
>>>      }
>>>  }
>>> }
>>>
>>> If I comment the lines for write the tiles, then I get the exception
>>> again.
>>>
>>> Any Idea?
>>>
>>>
>>>
>>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>>       
>>>> I can't tell you exactly what goes wrong, but work for a tile generator
>>>> has been done elsewhere.
>>>>
>>>> The FMTilingEngine prepares tiles, and automatically restarts the
>>>> MapGuide service when it encounters the problem:
>>>> http://www.websoftdev.com/download.cfm
>>>>
>>>> Zac has developed a browser based tile seeder:
>>>> http://zacster.blogspot.com/2008/07/mapguide-tile-cache-seeder.html
>>>>
>>>> I am building a tile seeder for use with Maestro (not complete, and not
>>>> released, LGPL):
>>>> http://svn.osgeo.org/mapguide/trunk/Tools/Maestro/MgCooker/
>>>>
>>>> Perhaps the FMTilingEngine will solve your troubles.
>>>> If not, you can consider building on one of the other solutions.
>>>>
>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>>
>>>>
>>>>
>>>> alucas skrev:
>>>>         
>>>>> Hello all,
>>>>>
>>>>> I'm trying to develop a tile pre-generation desktop application. To do
>>>>> this,
>>>>> I'm using mapguidedotnetapi.dll reference. My program creates a
>>>>> connection
>>>>> to the server and through the tileservice try to call gettile method
>>>>> for
>>>>> every tile. My problem is that gettile method fails and returns an
>>>>> xmlstream
>>>>> exception, then I need to restart the server service because I get a
>>>>> connection exception.
>>>>>
>>>>> This is the exception:
>>>>>
>>>>> http://www.nabble.com/file/p20872280/exception.jpg
>>>>>
>>>>> The exception happens not in the first gettile call, it happens when I
>>>>> called several times this method. My program is something like this:
>>>>>
>>>>> ...
>>>>> for each scalecount
>>>>>   for each column
>>>>>     for each row
>>>>>       tileService.GetTile(mapResId, layerGroupName, c, r, s)
>>>>> ...
>>>>>
>>>>> Solutions I tried:
>>>>>
>>>>> - Modify serverconfig.ini to enable poolconnections for my data.
>>>>> - Use thread.sleep between iterations
>>>>> - Use a separate thread to do this work
>>>>> - Generate tiles only for a scale factor.
>>>>>
>>>>> This solutions does not work for me.
>>>>>
>>>>> Any idea?
>>>>>
>>>>> Sorry for my english...
>>>>>
>>>>> Thanks in advance
>>>>>
>>>>>
>>>>>
>>>>>           
>>>> _______________________________________________
>>>> mapguide-users mailing list
>>>> mapguide-users at lists.osgeo.org
>>>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>>>>
>>>>
>>>>         
>>> --
>>> View this message in context:
>>> http://www.nabble.com/gettile-method-problems-tp20872280p20899422.html
>>> 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
>>>
>>>       
>>
>> -- 
>> Zac Spitzer -
>> http://zacster.blogspot.com
>> +61 405 847 168
>> _______________________________________________
>> mapguide-users mailing list
>> mapguide-users at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
>>
>>
>>     
>
>   
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