BaseX-Talk July 2011

basex-talk@mailman.uni-konstanz.de

29 participants
39 discussions

XQJ serialization
by Oda 09 Jul '11

09 Jul '11

Hi, I tried to execute the serializing example, but got a empty file. How can I get a correct result? (basex, basex-api 6.6.1) BaseX examples/ org.basex.examples.xqj.tutorial.Part5.java ---------- XQSequence xqs = xqe.executeQuery( "doc('etc/xml/orders.xml')//order[id='174']"); // NG - empty result xqs.writeSequence( new FileOutputStream("result.xml"), new Properties()); // OK System.out.println(xqs.getSequenceAsString(new Properties()); ---------- Thanks, Oda.

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Problem sending queries to embedded BaseX server
by Huib Verwey 08 Jul '11

08 Jul '11

Hi, I am trying to use BaseX JAX-RX embedded, e.g. start it from my desktop application when the user clicks "Open App" in the system tray menu. The server starts up fine, but when I try to send it a query the Jersey server generates an error, see the log below after the user clicks "Open App". ================================================================================================ 7-jul-2011 16:25:01 com.sun.jersey.api.core.PackagesResourceConfig init INFO: Scanning for root resource and provider classes in the packages: org.jaxrx.resource 7-jul-2011 16:25:02 com.sun.jersey.api.core.ScanningResourceConfig logClasses INFO: Root resource classes found: class org.jaxrx.resource.XMLResource class org.jaxrx.resource.JaxRxResource 7-jul-2011 16:25:02 com.sun.jersey.api.core.ScanningResourceConfig init INFO: No provider classes found. 7-jul-2011 16:25:02 com.sun.jersey.server.impl.application.WebApplicationImpl _initiate INFO: Initiating Jersey application, version 'Jersey: 1.6 03/25/2011 01:14 PM' 7-jul-2011 16:25:03 com.sun.jersey.spi.container.ContainerResponse write SEVERE: A message body writer for Java class org.basex.api.jaxrx.BXJaxRx$2, and Java type class org.basex.api.jaxrx.BXJaxRx$2, and MIME media type text/xml; omit-xml-declaration=no was not found 7-jul-2011 16:25:03 com.sun.jersey.spi.container.ContainerResponse write SEVERE: The registered message body writers compatible with the MIME media type are: */* -> com.sun.jersey.server.impl.template.ViewableMessageBodyWriter 7-jul-2011 16:25:03 com.sun.jersey.spi.container.ContainerResponse logException SEVERE: Mapped exception to response: 500 (Internal Server Error) javax.ws.rs.WebApplicationException: com.sun.jersey.api.MessageException: A message body writer for Java class org.basex.api.jaxrx.BXJaxRx$2, and Java type class org.basex.api.jaxrx.BXJaxRx$2, and MIME media type text/xml; omit-xml-declaration=no was not found at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:285) at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1310) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1223) at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1213) at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537) at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:699) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) ================================================================================================ I already tried removing the "; omit-xml-declaration=no" but that didn't help. Any ideas on why this does not work? Hartelijke groet, Huib Verweij. -- Drs. Huib Verweij Senior software developer - The Language Archive Max Planck Institute for Psycholinguistics P.O. Box 310 6500 AH Nijmegen The Netherlands t +31-24-3521911 e huib.verwey(a)mpi.nl<mailto:huib.verwey@mpi.nl> w http://www.mpi.nl/

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help
by Lusha Wang 07 Jul '11

07 Jul '11

Hello Everyone I am a newbie to baseX For the following xml, how can I select all the transactions with type udp. This command doesn't work: for $transation in doc('test')//transation where $transation/istype='udp' return <transation>{ $transation/@id }</transation> Thanks a million Serena Wang <root> <Journal> <Document id="1"> <Author name="do-not-reply%40domaintools.com" reputation="1.0"/> <Time>Sat, 1 May 2010 00:55:20 -0700 (PDT)</Time> <Entity> <URL>http%3A%2F%2Fwww.domaintools.com%2Fmark-alert%2F</URL> <Domain>mexicoisart.com</Domain> <IP>199.236.158.250</IP> </Entity> </Document> <Document id="2"> <Author name="apache%40den.giac.net+%28Apache%29" reputation="10.0"/> <Time>Sat, 1 May 2010 10:35:54 +0000 (UTC)</Time> <Entity> <URL>https%3A%2F%2Fisc.sans.org%2Fdiary.html%3Fstoryid%3D8605</URL> <IP>66.28.0.45</IP> </Entity> </Document> </Journal> <transactions> <transation id="56977"> <time>09 Sep 10 23:00:52</time> <istype type="type1"/> <src>10.8.124.143</src> <dst>66.28.0.45</dst> <status>INT</status> </transation> </transactions> <types> <type id="type1"> <name>udp</name> </type> </types> </root>

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Database Limits
by Dave Glick 05 Jul '11

05 Jul '11

At one point in the past there were limits to how many unique element names could be stored/indexed in the database. We exceeded that limit for our documents and so to address the problem we started splitting out our data into multiple databases and using some hacky rewrites of the QueryContext class to work with them as if they were in one database. We haven't synced up in a while and the BaseX API and class structure has undergone some really good improvement in the meantime. I'm in the processing of revising how we interface with and use BaseX and would like to consider going back to a single database if possible. In general, the question is: does a limit to the number of unique element/attribute names still exist? If so, what is it? Time permitting (it appears you guys have been busy pushing out great new features recently) I think a Wiki page with a list of all limits on the database would be very helpful (I.e., limited to X number of elements, limited to Y number of attributes per element, limited to Z size on disk, etc.) Thanks! -- Dave Glick | dglick(a)dracorp.com<mailto:dglick@dracorp.com> | 703-299-0700 x212 Data Research and Analysis Corp. | www.dracorp.com<http://www.dracorp.com>

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Collation
by Xavier-Laurent Salvador 05 Jul '11

05 Jul '11

Hello Guys, I'm trying to declare default collation in my prologue but whatever i write, the answer is always [XQST0038] Unknown collation Is there a documentation for BaseX reference ? Thank you for all your work, Salvador

2 1

bulk-load
by Tomaso Musitelli 04 Jul '11

04 Jul '11

Hello dear BaseX Team, I would like to load a big number of small documents in Basex. What I do is to use a little Java program: Context ctx = new Context(); new CreateDB("basex1").execute(ctx); new CreateIndex("fulltext").execute(ctx); System.err.println("\n* Show database information:"); System.err.print(new InfoDB().execute(ctx)); for( ... ) { new Add(somedata, miname, collection).execute(ctx); } I dont know if it is correct , efficient ? Do you have a notion of transaction, like begin/commit ? ( I did not see something like that) My concern is that it seems not to behave well when the number of documents goes big: (each doc is about 2500 bytes) 10000 => 54 seconds ; 5.4 millis / document 20000 => 202 s ; 10 ms 50000 => 862 s ; 17.2 ms And in fact I want to store more than 1 million! Actually is there a limit in size ? Is 1 million x 2.5Kb OK? Thank you very much Tomaso

2 1

API does not contain XQueryService interface
by Robby Pelssers 04 Jul '11

04 Jul '11

Hi all, I was trying to test some code I wrote for Sedna XML DB but I noticed that org.xmldb.api.modules.XQueryService is not part of the API. I checked EXIST and Sedna and both include this Service. Is there any particular reason why this not included by BaseX? Kind regards, Robby Pelssers

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Frequently Updated XML files
by Eric Jones 03 Jul '11

03 Jul '11

Hello all, I am new to BaseX. I want to know how one handles frequently updated xml files. Do you have to monitor the file with a third party tool and upon change drop the file from BaseX and re-add it? Regards, Eric

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FYI: basex_6.7-1_amd64.changes ACCEPTED into unstable
by Alexander Holupirek 02 Jul '11

02 Jul '11

From: Debian FTP Masters <ftpmaster(a)ftp-master.debian.org> Date: 2. Juli 2011 07:17:33 MESZ To: Alexander Holupirek <alex(a)holupirek.de>, tmancill(a)debian.org Subject: basex_6.7-1_amd64.changes ACCEPTED into unstable Accepted: basex_6.7-1.debian.tar.gz to main/b/basex/basex_6.7-1.debian.tar.gz basex_6.7-1.dsc to main/b/basex/basex_6.7-1.dsc basex_6.7-1_all.deb to main/b/basex/basex_6.7-1_all.deb basex_6.7.orig.tar.gz to main/b/basex/basex_6.7.orig.tar.gz Override entries for your package: basex_6.7-1.dsc - source database basex_6.7-1_all.deb - optional database Announcing to debian-devel-changes(a)lists.debian.org Thank you for your contribution to Debian.

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BaseX-Talk July 2011