<div dir="ltr"><div dir="ltr">On Mon, Feb 11, 2019 at 5:53 PM Even Rouault <<a href="mailto:even.rouault@spatialys.com">even.rouault@spatialys.com</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">What you can do (until OGR becomes smarter at a later point...) is:<br>
SetAttributeFilter("0 = 1")<br>
GetNextFeature()<br>
<br>
This will iterate over all the features and build the index.<br></blockquote><div><br></div><div>Excellent</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">> <br>
> Also, are DataSource objects thread safe, can one perform multiple reads in<br>
> parallel over them?<br>
<br>
No, an object should never be used by more than one thread at a time.<br></blockquote><div><br></div><div>So each thread needs to build its own DataSource and associated in memory spatial index,</div><div>and keep them alive for as possible in order to reuse the index?</div><div>Sorry for all these questions, trying to figure out if there is a way to keep the index alive </div><div>long enough to be useful in an application like GeoServer, where each thread serves one request</div><div>in a stateless manner. I'm guessing maybe one would have to setup some sort of DataSource</div><div>pooling, not unlike a connection pool for databases.</div><div>Are there other file formats that would benefit from such a thing?</div><div><br></div><div>Cheers</div><div>Andrea</div><div><span style="font-size:14.6667px;white-space:pre-wrap;font-family:Arial"><br></span></div><div><span style="font-size:14.6667px;white-space:pre-wrap;font-family:Arial">==</span><br></div></div><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><span><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><font face="Arial"><span style="font-size:14.6667px;white-space:pre-wrap">GeoServer Professional Services from the experts! Visit <a href="http://goo.gl/it488V" target="_blank">http://goo.gl/it488V</a> for more information.
==
Ing. Andrea Aime
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