Hi,
For now the only solution I have if I want to perform different queries on
different feature types is to recreate a new DataStore and a new DataStore for
each new request! :(
Of course it's temporary workaround because it's disastrous for performances.
Well, I guess I'm not the first one who want to keep in memory a DataStore
object (with its different FeatureStore objects) across different queries.
Nobody could help me pleaaaase?
Regards,
Vincent.
________________________________
De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] De la part de zze-M2S FRISON V
ext RD-BIZZ
Envoyé : lundi 5 mars 2007 15:30
À : [email protected]
Objet : [Geotools-gt2-users] DataStore factory
Hello,
I'd like to understand in wich way a DataStore object (and its relative object
such as FeatureStore/FeatureSource or FeatureType) could be shared across
different queries.
I have several layers and each of them keep a DataStore, a FeatureStore and a
FeatureType. All of these 3 objects are stored as instance attribut of my Layer
class.
I have problems as soon as I try to insert feature into *different* feature
types. In this case, the following exception is raised:
java.util.NoSuchElementException
org.geotools.xml.filter.FilterComplexTypes$ServiceExceptionType.getValue(FilterComplexTypes.java:1668)
org.geotools.xml.handlers.ComplexElementHandler.endElement(ComplexElementHandler.java:156)
org.geotools.xml.XMLSAXHandler.endElement(XMLSAXHandler.java:264)
org.apache.xerces.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:579)
org.apache.xerces.impl.XMLNamespaceBinder.handleEndElement(XMLNamespaceBinder.java:897)
If I sniff my network I can see that geotools send empty <Insert></Insert> tags
inside the <Transaction> query!
I have a factory which provide WFSDataStore as singleton. "Singletonize" the
DataStore is a good idea or it is not? I guess it would be better (less local
ressources and less network traffic with only one GetCapabilities request). But
are DataStore objects fully synchronized and thread safe?
But note that even if I tried to use a "new instance" factory instead of a
singleton one, I have the same problems as soon I insert features which have
different types (always the same error with empty <insert>). It's really crazy
because my two layers owns their own objects (DataStore, FeatureType and
FeatureSource/Store). I really can't figure out how side effects could happen
since my objects are differents ones!
Thanks a lot for your help,
Vincent.
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