Interesting point, Jody!
I am using it like the following:
Transaction updateTrans = new
DefaultTransaction("update");
FeatureWriter<SimpleFeatureType, SimpleFeature> writer =
featureStore.getDataStore()
.getFeatureWriter(featureStore.getDataStore().getTypeNames()[0],
new
FidFilterImpl(changedFeautureId2Feature.keySet()),
updateTrans);
for (; writer.hasNext();) {
SimpleFeature feature2Update = writer.next();
// ...
// ...
// here I change the feature2Update
// ...
// ...
writer.write();
}
writer.close();
updateTrans.commit();
updateTrans.close();
Thanks,
Sergey
On Sat, 6 Mar 2010 22:20:22 +1100
Jody Garnett <[email protected]> wrote:
Can I ask how you are using transactions?
A lot of software edits a shapefile "in place";
GeoTools tends to write out the whole thing again during
the commit (into a separate file, and then rename the
files to swap them; and then remove the original).
There are seperate read and write locks in the
shapefile code; so the writing out should wait for all the
readers to be finished before this occurs.
Jody
On 06/03/2010, at 7:32 PM, Michael Bedward wrote:
Hi Sergey,
I don't know enough about shapefile locking to
help, sorry. Hopefully
someone else here can assist.
Michael
Hi Michael,
Yes this is true, I am writing to the
shapefile being rendered.
Why this is a problem? A lot of software do
this.
I am just need a interactive renderer with
editing capabilities. BTW it
correctly renders/writes everything if I
confine writer.write() and
updateTrans.commit() statements in try-catch
clauses.
Maybe there is a special mode for geotools
which imposes less restrictive
locking on shapefiles?
Thanks,
Sergey
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