BaseX-Talk

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6 participants
5269 discussions

ajax and http server - cross-domain, jsonp or proxy?
by colin mcenearney 21 Oct '11

21 Oct '11

Hi, I just installed basex for the first time and I am very impressed and really looking forward to using it. Thanks for making such a great tool available for free! I'm not really a developer so this might be an obvious question: using basex's http server, what is the best strategy for ajax-style communication between browser and db? I am aware of a few approaches: 1) direct httprequest to host:8984/my_db/somequery, but going across ports seems to violate "same origin policy" 2) using jsonp 3) calling from browser to server-script (like the php example in basex docs), which handles request to the db All responses are greatly appreciated, Colin

4 6

Problems in using BaseX REST server - IncompatibleClassChangeError javax.ws.rs.core.Response$Status does not implement the requested interface
by Pushkaraj Thorat 21 Oct '11

21 Oct '11

Hello, I am doing setup for REST enabled basex database with procedure mentioned in http://docs.basex.org/wiki/JAX-RX_API URL. Configuring & starting server and running failed due to class not found, but later I've modified the ./basexrest script as: (Included all the jars in lib folder) ######START #!/bin/bash # Path to this script PWD=`dirname $0` # Paths to distributed files or source directories BASEX=$PWD/BaseX.jar BASEXAPI=$PWD/../lib/basex-api.jar # Classpath LIB=$PWD/../lib LIB_CP="" for JAR_FILE in $LIB/*.jar do LIB_CP="$LIB/$JAR_FILE:$LIB_CP" done CP=$BASEX:$BASEXAPI:$LIB_CP # Options for virtual machine VM=-Xmx1g # Run REST server java -cp "$CP" $VM org.basex.api.jaxrx.JaxRxServer "$@" ######END after this, server started successfully, hit the URL - http://localhost:8984/basex/jax-rx I am getting following exception: java.lang.IncompatibleClassChangeError: Class javax.ws.rs.core.Response$Status does not implement the requested interface javax.ws.rs.core.Response$StatusType at com.sun.jersey.spi.container.ContainerResponse.getStatus(ContainerResponse.java:548) at com.sun.jersey.spi.container.ContainerResponse$CommittingOutputStream.commitWrite(ContainerResponse.java:156) at com.sun.jersey.spi.container.ContainerResponse$CommittingOutputStream.write(ContainerResponse.java:133) at org.basex.io.BufferedOutput.flush(BufferedOutput.java:50) at org.basex.io.PrintOutput.flush(PrintOutput.java:126) at org.basex.data.XMLSerializer.cls(XMLSerializer.java:206) at org.basex.data.Serializer.close(Serializer.java:219) at org.basex.api.jaxrx.BXJaxRx$1.code(BXJaxRx.java:96) at org.basex.api.jaxrx.BXCode.run(BXCode.java:53) at org.basex.api.jaxrx.BXOutput.write(BXOutput.java:53) at com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:71) at com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:57) at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:299) Your help is appreciated. Thanks, Pushkaraj

3 6

Performance of Basex 7.0 XQuery execution
by Constantine Hondros 21 Oct '11

21 Oct '11

Hi there, I am running relatively simply XQuery over a Basex database read in from about 100 MB of XML. While performance in general is fantastic, with most queries completing in a few seconds, I am getting worryingly slow performace on certain queries using XPath axes such as preceding-sibling. For example, the following simple (if a bit silly) query takes over 30 minutes to execute: /tns:pois/tns:poi[not(preceding-sibling::tns:poi)] For what it's worth, there are only about 100,000 instances of the <tns:poi> element. So the immediate question is whether this performance is to be expected. If not, what are the obvious things to look at in terms of performance tuning? Thanks in advance, Constantine Constantine Hondros | Senior Data Engineer | TomTom Places | constantine.hondros(a)tomtom.com<mailto:constantine.hondros@tomtom.com> | +31 (0) 88 245 6239 office | +31 (0) 6 402 14838 mobile | places.tomtom.com<http://places.tomtom.com/>

4 5

basexgui with client capability
by Fabrice Etanchaud 19 Oct '11

19 Oct '11

Dear all, do you plan to add client capability to BaseX GUI ? Fabrice ETANCHAUD Senior analyst programmer Edital

2 1

Strange logical operation
by Erol Akarsu 19 Oct '11

19 Oct '11

Hi, I have faced some strange case as below. s1 and s variables has to have same value because their selecting operator same. Is there anything I miss? Why xquery is not calculating boolean for each sequence? let $ns := (4 , 5, 6, 7, 8, 3, 7) let $ind := (2,5,7) let $j := 1 let $i1 := $ind[$j] let $i2 := $ind[$j+1] let $s := $ns[fn:position() < $i2 and fn:position() > $i1] let $s1 := $ns[fn:position() > $i1 and fn:position() < $i2 ] return <result> <s>{$s}</s> <s1>{$s1}</s1> </result> <result> <s>6 7</s> <s1>6 7 8 3</s1> </result> Query: let $ns := (4 , 5, 6, 7, 8, 3, 7) Compiling: - pre-evaluating (4, 5, 6, 7, 8, 3, 7) - binding static variable $ns - pre-evaluating (2, 5, 7) - binding static variable $ind - binding static variable $j - pre-evaluating 1 + 1 - rewriting And expression to predicate(s) - rewriting fn:boolean(fn:position() < $i2) - rewriting fn:boolean(fn:position() > $i1) - rewriting And expression to predicate(s) - rewriting fn:boolean(fn:position() > $i1) - rewriting fn:boolean(fn:position() < $i2) - removing variable $ns - removing variable $ind - removing variable $j - moving for/let clauses Result: let $i2 := ((2, 5, 7))[position() = 2] let $i1 := ((2, 5, 7))[position() = 1] let $s1 := ((4, 5, 6, 7, 8, 3, 7))[fn:position() > $i1][fn:position() < $i2] let $s := ((4, 5, 6, 7, 8, 3, 7))[fn:position() < $i2][fn:position() > $i1] return element { "result" } { element { "s" } { $s }, element { "s1" } { $s1 } } Timing: - Parsing: 0.14 ms - Compiling: 0.56 ms - Evaluating: 0.46 ms - Printing: 0.05 ms - Total Time: 1.23 ms Result: - Results: 1 Item - Updated: 0 Items - Printed: 50 Bytes Query plan: <FLWR> <Let var="$i2"> <IterPosFilter> <ItrSeq size="3"> <Item value="2" type="integer"/> <Item value="5" type="integer"/> <Item value="7" type="integer"/> </ItrSeq> <Pos min="2" max="2"/> </IterPosFilter> </Let> <Let var="$i1"> <IterPosFilter> <ItrSeq size="3"> <Item value="2" type="integer"/> <Item value="5" type="integer"/> <Item value="7" type="integer"/> </ItrSeq> <Pos min="1" max="1"/> </IterPosFilter> </Let> <Let var="$s1"> <Filter> <ItrSeq size="7"> <Item value="4" type="integer"/> <Item value="5" type="integer"/> <Item value="6" type="integer"/> <Item value="7" type="integer"/> <Item value="8" type="integer"/> </ItrSeq> <CmpG op=">"> <FNAcc name="position()"/> <VarRef name="$i1"/> </CmpG> <CmpG op="<"> <FNAcc name="position()"/> <VarRef name="$i2"/> </CmpG> </Filter> </Let> <Let var="$s"> <Filter> <ItrSeq size="7"> <Item value="4" type="integer"/> <Item value="5" type="integer"/> <Item value="6" type="integer"/> <Item value="7" type="integer"/> <Item value="8" type="integer"/> </ItrSeq> <CmpG op="<"> <FNAcc name="position()"/> <VarRef name="$i2"/> </CmpG> <CmpG op=">"> <FNAcc name="position()"/> <VarRef name="$i1"/> </CmpG> </Filter> </Let> <Return> <CElem> <Item value="result" type="xs:QName"/> <CElem> <Item value="s" type="xs:QName"/> <VarRef name="$s"/> </CElem> <CElem> <Item value="s1" type="xs:QName"/> <VarRef name="$s1"/> </CElem> </CElem> </Return> </FLWR> On Wed, Oct 19, 2011 at 7:04 AM, Truong An Nguyen <ngtruongan(a)gmail.com>wrote: > Hi, > > can you please tell me how I apply the fulltext index for attributes? > > Many thanks. > > Cheers, > An > > _______________________________________________ > BaseX-Talk mailing list > BaseX-Talk(a)mailman.uni-konstanz.de > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk > >

2 1

Full-Text index for attributes!
by Truong An Nguyen 19 Oct '11

19 Oct '11

Hi, can you please tell me how I apply the fulltext index for attributes? Many thanks. Cheers, An

2 1

BaseX 7.0 Update - Soft-Files.com
by Soft-Files Team 19 Oct '11

19 Oct '11

Dear Developer, Your product BaseX 7.0 has been updated. Your product review page is located at: http://www.soft-files.com/basex_72311.html. Sincerely, The Soft-Files Team

1 0

Is there a indexOf/lastIndexOf as it is available in java's String class?
by Erdal Karaca 19 Oct '11

19 Oct '11

Could not find that function in basex. Other xquery implementations seem to script this in xquery itself via declare function...

2 1

HTTP API DB access
by Ralf Jung 19 Oct '11

19 Oct '11

Hi list, while debugging my application, I noticed that when I send a request to the HTTP API of basex, the request is then sent by basex to itself via a localhost connection. That is, the HTTP API part of basex sends a message to the BaseX native API through TCP. Now, I wonder, is this really necessary? After all, both reside in the same process, so going through the OS feels a bit wasteful here. I noticed that I can change this behaviour if I pass the "-l" flag to basexhttp ("local mode"), so the code to directly use the in-process DB obviously exists. I wonder why it can only be used in the local mode which entirely disables the "native" BaseX API? Kind regards, Ralf

2 9

Please confirm subscription to Clinical Trials Centre's newsletter! (Action required)
by magnifier 17 Oct '11

17 Oct '11

1 0

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