BaseX-Talk

basex-talk@mailman.uni-konstanz.de

6 participants
5269 discussions

None
by None 28 Jan '25

28 Jan '25

dropped and synthetically generated during the serialization process; and that our implementation would look much cleaner.

1 0

None
by None 28 Jan '25

28 Jan '25

BaseX's behavior is somehow influenced by whether a document uses namespaces or not? Is that true? In other words, BaseX shows different performance depending on whether prefixes are used? Why is that so? Why did you not choose a representation that abstracts away namespace prefixes and treats all elements as if they were in a namespace? Logically, it's not a higher burden (storing a pair (index, string) is just as efficient as storing or indexing a string); and BaseX is not required to output XML that preserves prefixes and default namespaces when a query is made; any equivalent XML that expresses the query result is acceptable. I'm wondering if the correctness problems we're seeing with respect to namespaces may be due to this decision of treating namespaces specially rather than the default case. - Godmar

1 0

None
by None 28 Jan '25

28 Jan '25

parameter applies only where wrap=3Dyes (it is ignored when wrap=3Dno) output does allow media-type to be specified...interestingly, the spec you refer to says the media-type can contain a value in line with RFC2046, that RFC happens to include textual media-types as well (e.g., text/plain) as XM= L media-types. So, I would propose to use a) the situation as it is today (wrap=3Dno, wrap=3Dyes dictating whether jax-rx:result and jax-rx:results are used to wrap) but also b) to be able to override the media-type independently of wrap parameter's value using output=3Dmedia-type=3Dtext%2Fplain or output=3Dmedia-type=3Dapplication%2fxml for example. Whether to use text/p= lain for wrap=3Dno becomes non-critical then (because of the ability to override it) and leaving it at text/plain as default is probably fine. Thanks. On Mon, Jan 31, 2011 at 11:01 AM, Christian Gr=FCn <christian.gruen(a)gmail.com>wrote: > > Okay, I thought setting output to application/xml but wrap=3Dno will me= an > the > > person writing the query is taking the responsibility that they do not > want > > results to be wrapped but know the result is xml so forcing the output = to > be > > application/xml (so that the response mime-type is set to application/x= ml > in > > this case)...what are the valid values for output parameter? > > All parameters are defined in the W3 specs: > http://www.w3.org/TR/xslt-xquery-serialization/ > > Please browse our JAX-RX docs for some usage examples: > http://docs.basex.org/wiki/JAX-RX_API > > > An invocation like > > http://localhost:8984/basex/jax-rx?wrap=3Dno&query=3D1+to+10&output=3Dt= ext/xmlor > > > http://localhost:8984/basex/jax-rx?wrap=3Dyes&query=3D1+to+10&output=3Dte= xt/xml > > (or text%2Fxml) results in: > > Yes, I see that there's some need to work on the response media type. > I have two solutions in mind: > > a) All textual results of "query" and "run" could be returned as > application/xml, no matter what value has been assigned to "wrap". > This would mean that all non-XML query results (e.g., resulting from a > XQuery like "1 to 10") would be handles as XML, too. > > b) This is one is similar to your approach: an additional JAX-RX > parameter could be introduced to explicitly overwrite the resulting > media type. Example: > > http://localhost:8984/basex/jax-rx?wrap=3Dyes&query=3D1&media=3Dapplicat= ion/xml > > What do you, and others, think? > > Both changes are not BaseX-centric, but have to be made in the JAX-RX > interface, so this might take some more time; but I'll definitely add > this to our internal issue tracker. > > Christian > --0016e64c2a1a56ee16049b22f778 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable The scope of this posting is only xquery.<br><br>From your discussion on ou= tput parameter, it appears to me that that parameter applies only where wra= p=3Dyes (it is ignored when wrap=3Dno)<br><br>output does allow media-type = to be specified...interestingly, the spec you refer to says the media-type = can contain a value in line with RFC2046, that RFC happens to include textu= al media-types as well (e.g., text/plain) as XML media-types.<br> So, I would propose to use a) the situation as it is today (wrap=3Dno, wrap= =3Dyes dictating whether jax-rx:result and jax-rx:results are used to wrap)= but also b) to be able to override the media-type independently of wrap pa= rameter's value using output=3Dmedia-type=3Dtext%2Fplain or output=3Dme= dia-type=3Dapplication%2fxml for example.=A0 Whether to use text/plain for = wrap=3Dno becomes non-critical then (because of the ability to override it)= and leaving it at text/plain as default is probably fine.<br> <br>Thanks.<br><br><br><br><div class=3D"gmail_quote">On Mon, Jan 31, 2011 = at 11:01 AM, Christian Gr=FCn <span dir=3D"ltr"><<a href=3D"mailto:chris= tian.gruen(a)gmail.com">christian.gruen(a)gmail.com</a>></span> wrote:<br><b= lockquote class=3D"gmail_quote" style=3D"margin: 0pt 0pt 0pt 0.8ex; border-= left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div class=3D"im">> Okay, I thought setting output to application/xml bu= t wrap=3Dno will mean the<br> > person writing the query is taking the responsibility that they do not= want<br> > results to be wrapped but know the result is xml so forcing the output= to be<br> > application/xml (so that the response mime-type is set to application/= xml in<br> > this case)...what are the valid values for output parameter?<br> <br> </div>All parameters are defined in the W3 specs:<br> =A0<a href=3D"http://www.w3.org/TR/xslt-xquery-serialization/" target=3D"_= blank">http://www.w3.org/TR/xslt-xquery-serialization/</a><br> <br> Please browse our JAX-RX docs for some usage examples:<br> =A0<a href=3D"http://docs.basex.org/wiki/JAX-RX_API" target=3D"_blank">htt= p://docs.basex.org/wiki/JAX-RX_API</a><br> <div class=3D"im"><br> > An invocation like<br> > <a href=3D"http://localhost:8984/basex/jax-rx?wrap=3Dno&query=3D1+= to+10&output=3Dtext/xml" target=3D"_blank">http://localhost:8984/basex/= jax-rx?wrap=3Dno&query=3D1+to+10&output=3Dtext/xml</a> or<br> > <a href=3D"http://localhost:8984/basex/jax-rx?wrap=3Dyes&query=3D1= +to+10&output=3Dtext/xml" target=3D"_blank">http://localhost:8984/basex= /jax-rx?wrap=3Dyes&query=3D1+to+10&output=3Dtext/xml</a><br> > (or text%2Fxml) results in:<br> <br> </div>Yes, I see that there's some need to work on the response media t= ype.<br> I have two solutions in mind:<br> <br> a) All textual results of "query" and "run" could be re= turned as<br> application/xml, no matter what value has been assigned to "wrap"= .<br> This would mean that all non-XML query results (e.g., resulting from a<br> XQuery like "1 to 10") would be handles as XML, too.<br> <br> b) This is one is similar to your approach: an additional JAX-RX<br> parameter could be introduced to explicitly overwrite the resulting<br> media type. Example:<br> <br> =A0<a href=3D"http://localhost:8984/basex/jax-rx?wrap=3Dyes&query=3D1&= amp;media=3Dapplication/xml" target=3D"_blank">http://localhost:8984/basex/= jax-rx?wrap=3Dyes&query=3D1&media=3Dapplication/xml</a><br> <br> What do you, and others, think?<br> <br> Both changes are not BaseX-centric, but have to be made in the JAX-RX<br> interface, so this might take some more time; but I'll definitely add<b= r> this to our internal issue tracker.<br> <font color=3D"#888888"><br> Christian<br> </font></blockquote></div><br> --0016e64c2a1a56ee16049b22f778--

1 0

None
by None 28 Jan '25

28 Jan '25

I general, the integration of JaxRx has been simplified and generalized a lot since Version 6.1. If you're working with the sources, you can checkout the main and api package and directly run the contained basexrest(.bat) script. Otherwise, you'll need to... 1. get basex.jar and basex-jar.api: http://basex.org/download 2. get one of the start scripts (win or linux/mac): https://svn.uni-konstanz.de/dbis/basex/trunk/api/etc/basexrest.bat https://svn.uni-konstanz.de/dbis/basex/trunk/api/etc/basexrest 3. get the external libraries referenced from the start script: https://svn.uni-konstanz.de/dbis/basex/trunk/api/lib/ Hope this helps, Christian 2010/12/13 Mahender Didwania <mahender(a)didwania.co.uk>: > Hi, > > Two things: > > 1. > Earlier I was using version 6.2.9 and the class StartJaxRx.java seemed to= work fine. =C2=A0The need is to have the ability to invoke the server from= a script. > > I can't find the StartJaxRx in 6.3.3 any more. =C2=A0Using the old class = with 6.3.3, the server says it started up fine, but when I attempt to acces= s it over HTTP/REST, I get error for /basex/jax-rx (note that /basex/ is ok= ay): > > Problem accessing /basex/jax-rx/. Reason: > > =C2=A0 =C2=A0tried to access method org.basex.server.ClientSession.execut= e(Ljava/lang/String;Ljava/io/OutputStream;)V from class org.basex.api.jaxrx= .BXOutput > > Caused by: > > java.lang.IllegalAccessError: tried to access method org.basex.server.Cli= entSession.execute(Ljava/lang/String;Ljava/io/OutputStream;)V from class or= g.basex.api.jaxrx.BXOutput > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.basex.api.jaxrx.BXOutput.exec(BXOutput.= java:62) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.basex.api.jaxrx.BXJaxRx$1.code(BXJaxRx.= java:61) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.basex.api.jaxrx.BXCode.run(BXCode.java:= 56) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.basex.api.jaxrx.BXOutput.write(BXOutput= .java:51) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at com.sun.jersey.core.impl.provider.entity.St= reamingOutputProvider.writeTo(StreamingOutputProvider.java:71) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at com.sun.jersey.core.impl.provider.entity.St= reamingOutputProvider.writeTo(StreamingOutputProvider.java:57) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at com.sun.jersey.spi.container.ContainerRespo= nse.write(ContainerResponse.java:299) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at com.sun.jersey.server.impl.application.WebA= pplicationImpl._handleRequest(WebApplicationImpl.java:1326) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at com.sun.jersey.server.impl.application.WebA= pplicationImpl.handleRequest(WebApplicationImpl.java:1239) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at com.sun.jersey.server.impl.application.WebA= pplicationImpl.handleRequest(WebApplicationImpl.java:1229) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at com.sun.jersey.spi.container.servlet.WebCom= ponent.service(WebComponent.java:420) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at com.sun.jersey.spi.container.servlet.Servle= tContainer.service(ServletContainer.java:497) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at com.sun.jersey.spi.container.servlet.Servle= tContainer.service(ServletContainer.java:684) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at javax.servlet.http.HttpServlet.service(Http= Servlet.java:820) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.servlet.ServletHolder.han= dle(ServletHolder.java:511) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.servlet.ServletHandler.ha= ndle(ServletHandler.java:401) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.servlet.SessionHandler.ha= ndle(SessionHandler.java:182) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.handler.ContextHandler.ha= ndle(ContextHandler.java:766) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.handler.HandlerWrapper.ha= ndle(HandlerWrapper.java:152) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.Server.handle(Server.java= :326) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.HttpConnection.handleRequ= est(HttpConnection.java:542) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.HttpConnection$RequestHan= dler.headerComplete(HttpConnection.java:928) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.HttpParser.parseNext(Http= Parser.java:549) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.HttpParser.parseAvailable= (HttpParser.java:212) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.HttpConnection.handle(Htt= pConnection.java:404) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.jetty.bio.SocketConnector$Conne= ction.run(SocketConnector.java:228) > =C2=A0 =C2=A0 =C2=A0 =C2=A0at org.mortbay.thread.QueuedThreadPool$PoolThr= ead.run(QueuedThreadPool.java:582) > > > 2. > For version 6.1, you provide various files, including a .zip, on your web= site; for 6.3.3, you only provide basex.jar and basex-api.jar. =C2=A0I had = earlier created my own maven build to include all dependencies (including t= he ones from java.net repository), but as noted above, I cannot get 6.3.3 t= o work. =C2=A0Could you please provide a .zip file for every release like y= ou have for 6.1 on your web-site (merely replacing BaseX61.jar with basex.j= ar and BaseX61-jaxrx.jar with basex-api.jar (for 6.3.3 versions) does not s= eem to help)? > > Thanks, > Mahender. > _______________________________________________ > BaseX-Talk mailing list > BaseX-Talk(a)mailman.uni-konstanz.de > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >

1 0

None
by None 28 Jan '25

28 Jan '25

I general, the integration of JaxRx has been simplified and generalized a lot since Version 6.1. If you're working with the sources, you can checkout the main and api package and directly run the contained basexrest(.bat) script. Otherwise, you'll need to... 1. get basex.jar and basex-jar.api: http://basex.org/download 2. get one of the start scripts (win or linux/mac): https://svn.uni-konstanz.de/dbis/basex/trunk/api/etc/basexrest.bat https://svn.uni-konstanz.de/dbis/basex/trunk/api/etc/basexrest 3. get the external libraries referenced from the start script: https://svn.uni-konstanz.de/dbis/basex/trunk/api/lib/ Hope this helps, Christian 2010/12/13 Mahender Didwania <mahender(a)didwania.co.uk>: > Hi, > > Two things: > > 1. > Earlier I was using version 6.2.9 and the class StartJaxRx.java seemed to= work fine. =A0The need is to have the ability to invoke the server from a = script. > > I can't find the StartJaxRx in 6.3.3 any more. =A0Using the old class wit= h 6.3.3, the server says it started up fine, but when I attempt to access i= t over HTTP/REST, I get error for /basex/jax-rx (note that /basex/ is okay)= : > > Problem accessing /basex/jax-rx/. Reason: > > =A0 =A0tried to access method org.basex.server.ClientSession.execute(Ljav= a/lang/String;Ljava/io/OutputStream;)V from class org.basex.api.jaxrx.BXOut= put > > Caused by: > > java.lang.IllegalAccessError: tried to access method org.basex.server.Cli= entSession.execute(Ljava/lang/String;Ljava/io/OutputStream;)V from class or= g.basex.api.jaxrx.BXOutput > =A0 =A0 =A0 =A0at org.basex.api.jaxrx.BXOutput.exec(BXOutput.java:62) > =A0 =A0 =A0 =A0at org.basex.api.jaxrx.BXJaxRx$1.code(BXJaxRx.java:61) > =A0 =A0 =A0 =A0at org.basex.api.jaxrx.BXCode.run(BXCode.java:56) > =A0 =A0 =A0 =A0at org.basex.api.jaxrx.BXOutput.write(BXOutput.java:51) > =A0 =A0 =A0 =A0at com.sun.jersey.core.impl.provider.entity.StreamingOutpu= tProvider.writeTo(StreamingOutputProvider.java:71) > =A0 =A0 =A0 =A0at com.sun.jersey.core.impl.provider.entity.StreamingOutpu= tProvider.writeTo(StreamingOutputProvider.java:57) > =A0 =A0 =A0 =A0at com.sun.jersey.spi.container.ContainerResponse.write(Co= ntainerResponse.java:299) > =A0 =A0 =A0 =A0at com.sun.jersey.server.impl.application.WebApplicationIm= pl._handleRequest(WebApplicationImpl.java:1326) > =A0 =A0 =A0 =A0at com.sun.jersey.server.impl.application.WebApplicationIm= pl.handleRequest(WebApplicationImpl.java:1239) > =A0 =A0 =A0 =A0at com.sun.jersey.server.impl.application.WebApplicationIm= pl.handleRequest(WebApplicationImpl.java:1229) > =A0 =A0 =A0 =A0at com.sun.jersey.spi.container.servlet.WebComponent.servi= ce(WebComponent.java:420) > =A0 =A0 =A0 =A0at com.sun.jersey.spi.container.servlet.ServletContainer.s= ervice(ServletContainer.java:497) > =A0 =A0 =A0 =A0at com.sun.jersey.spi.container.servlet.ServletContainer.s= ervice(ServletContainer.java:684) > =A0 =A0 =A0 =A0at javax.servlet.http.HttpServlet.service(HttpServlet.java= :820) > =A0 =A0 =A0 =A0at org.mortbay.jetty.servlet.ServletHolder.handle(ServletH= older.java:511) > =A0 =A0 =A0 =A0at org.mortbay.jetty.servlet.ServletHandler.handle(Servlet= Handler.java:401) > =A0 =A0 =A0 =A0at org.mortbay.jetty.servlet.SessionHandler.handle(Session= Handler.java:182) > =A0 =A0 =A0 =A0at org.mortbay.jetty.handler.ContextHandler.handle(Context= Handler.java:766) > =A0 =A0 =A0 =A0at org.mortbay.jetty.handler.HandlerWrapper.handle(Handler= Wrapper.java:152) > =A0 =A0 =A0 =A0at org.mortbay.jetty.Server.handle(Server.java:326) > =A0 =A0 =A0 =A0at org.mortbay.jetty.HttpConnection.handleRequest(HttpConn= ection.java:542) > =A0 =A0 =A0 =A0at org.mortbay.jetty.HttpConnection$RequestHandler.headerC= omplete(HttpConnection.java:928) > =A0 =A0 =A0 =A0at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:= 549) > =A0 =A0 =A0 =A0at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.= java:212) > =A0 =A0 =A0 =A0at org.mortbay.jetty.HttpConnection.handle(HttpConnection.= java:404) > =A0 =A0 =A0 =A0at org.mortbay.jetty.bio.SocketConnector$Connection.run(So= cketConnector.java:228) > =A0 =A0 =A0 =A0at org.mortbay.thread.QueuedThreadPool$PoolThread.run(Queu= edThreadPool.java:582) > > > 2. > For version 6.1, you provide various files, including a .zip, on your web= site; for 6.3.3, you only provide basex.jar and basex-api.jar. =A0I had ear= lier created my own maven build to include all dependencies (including the = ones from java.net repository), but as noted above, I cannot get 6.3.3 to w= ork. =A0Could you please provide a .zip file for every release like you hav= e for 6.1 on your web-site (merely replacing BaseX61.jar with basex.jar and= BaseX61-jaxrx.jar with basex-api.jar (for 6.3.3 versions) does not seem to= help)? > > Thanks, > Mahender. > _______________________________________________ > BaseX-Talk mailing list > BaseX-Talk(a)mailman.uni-konstanz.de > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >

1 0

None
by None 28 Jan '25

28 Jan '25

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We look forward to receiving your ideas and to continue improving our long term partnership.<br /><br /> Kind regards,<br /><br /> ShareSoftware24<br /> <a href="http://www.sharesoftware24.com">http://www.sharesoftware24.com</a> </div> </div> </td></tr> </table> </body> </html> ------=_NextPart_000_00EB_01CB9138.3AFF0A20--

1 0

None
by None 28 Jan '25

28 Jan '25

Comparing version 6.3 to version 6.1 opening larger database 1s versus 54 s Complex XQuery over that database 0.14s versus 54 s Great, great, great. Thanks Jan Vl=C4=8Dinsk=C3=BD --=20 *Ing. Jan Vl=C4=8Dinsk=C3=BD* CAD programy Slune=C4=8Dnicov=C3=A1 338/3, 734 01 Karvin=C3=A1 R=C3=A1j, Czech Republic tel: +420-597 602 024; mob: +420-608 979 040 skype: janvlcinsky; GoogleTalk: jan.vlcinsky(a)gmail.com http://cz.linkedin.com/in/vlcinsky On Mon, Oct 25, 2010 at 10:11 AM, NewIntellectual <newintellectual(a)gmail.co= m > wrote: > Congratulations to the hard working BaseX team for releasing BaseX 6.3. I > haven't found a more powerful or useful XML database system. I know of ve= ry > few open source software projects that are as attentive to problems, and = as > rapidly making improvements, as BaseX. > _______________________________________________ > BaseX-Talk mailing list > BaseX-Talk(a)mailman.uni-konstanz.de > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk > > --0016e64bb7c2ea5ce504936e53c7 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable I fully agree<div>From technical point of view is new version very impressi= ve.<br>Comparing version 6.3 to version 6.1</div><div>opening larger databa= se 1s versus 54 s</div><div>Complex XQuery over that database 0.14s versus = 54 s</div> <div><br></div><div>Great, great, great.</div><div><br></div><div>Thanks</d= iv><div><br></div><div>Jan Vl=C4=8Dinsk=C3=BD</div><div><br></div><div>--= =C2=A0<br><div name=3D"sig_b0a60a250d" style=3D"margin-top: 2em; margin-rig= ht: 0pt; margin-bottom: 2em; margin-left: 0pt; "> <b>Ing. Jan Vl=C4=8Dinsk=C3=BD</b><br><small>CAD programy<br>Slune=C4=8Dnic= ov=C3=A1 338/3, 734 01 Karvin=C3=A1 R=C3=A1j, Czech Republic<br>tel: +420-5= 97 602 024; mob: +420-608 979 040<br>skype: janvlcinsky; GoogleTalk:=C2=A0<= a href=3D"mailto:jan.vlcinsky@gmail.com" target=3D"_blank">jan.vlcinsky@gma= il.com</a><br> <a href=3D"http://cz.linkedin.com/in/vlcinsky" target=3D"_blank">http://cz.= linkedin.com/in/vlcinsky</a></small></div></div><div><br></div><div><br><di= v class=3D"gmail_quote">On Mon, Oct 25, 2010 at 10:11 AM, NewIntellectual <= span dir=3D"ltr"><<a href=3D"mailto:newintellectual@gmail.com">newintell= ectual(a)gmail.com</a>></span> wrote:<br> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex;">Congratulations to the hard working BaseX t= eam for releasing BaseX 6.3. I haven't found a more powerful or useful = XML database system. I know of very few open source software projects that = are as attentive to problems, and as rapidly making improvements, as BaseX. <br>_______________________________________________<br> BaseX-Talk mailing list<br> <a href=3D"mailto:BaseX-Talk@mailman.uni-konstanz.de">BaseX-Talk(a)mailman.un= i-konstanz.de</a><br> <a href=3D"https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk" tar= get=3D"_blank">https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk<= /a><br> <br></blockquote></div><br> </div> --0016e64bb7c2ea5ce504936e53c7--

1 0

None
by None 28 Jan '25

28 Jan '25

very much. On an unrelated note how may I bind a Java class instance to an external variable in xqj? Ciao Stefano On Jun 2, 2010 8:09 AM, "Lukas Kircher" <lukaskircher1(a)googlemail.com> wrote: Hey Stefano, sorry for the delay. I'm glad to tell you that the problem has been solved. At least I hope so ... I added the fix to our repository - feel free to check that out. If any further issues arise, please let us know. Thanks for your help on improving BaseX! Kind regards, Lukas --0016363b8f9879818d048840514a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable <p>Dear Lukas</p> <p>From what I have tested I can confirm that your fix works well. Thank yo= u so very much. </p> <p>On an unrelated note=A0 how may I bind a Java class instance to an exter= nal variable in xqj?</p> <p>Ciao<br> Stefano</p> <p><blockquote type=3D"cite">On Jun 2, 2010 8:09 AM, "Lukas Kircher&qu= ot; <<a href=3D"mailto:lukaskircher1@googlemail.com">lukaskircher1@googl= email.com</a>> wrote:<br><br>Hey Stefano,<br> <br> sorry for the delay. I'm glad to tell you that the problem has been sol= ved.<br> At least I hope so ...<br> <br> I added the fix to our repository - feel free to check that out. If any fur= ther<br> issues arise, please let us know.<br> <br> Thanks for your help on improving BaseX!<br> <br> Kind regards,<br><font color=3D"#888888"> Lukas<br> </font></blockquote></p> --0016363b8f9879818d048840514a--

1 0

Synchronizing access to store
by Marco Lettere 27 Jan '25

27 Jan '25

Dear all, I'm wondering why the code in [1] is not working as expected. Expected means getting back a map with 100 keys. Instead I get a random number of keys which denotes the fact (proved by tracing) that the map in store is updated concurrently without respecting the lock annotations. Is there a way to obtain synchronized access to key/values of the default store? Thank you. Kind regards, Marco. [1] declare %updating %basex:lock('CONFIG') function local:write($k as xs:string) { store:put("config", map:put(store:get("config"), $k, random:integer(10))) }; let $s1 := store:put("config", map{}) let $s2 := xquery:fork-join(for $i in (1 to 100) return function(){ local:write("key" || $i) }) return count(map:keys(store:get("config")))

3 5

Deeper discussion of BaseX client/server and web app implementation?
by Eliot Kimber 27 Jan '25

27 Jan '25

I’m rethinking the implementation of my Mirabel system and trying to understand how best to manage concurrency for the web app (satisfying multiple read requests from web clients) while also managing updates to databases in a way that avoids blocking of reads or delaying of updates. I’ve done a read through of the current documentation at https://docs.basex.org/ and also reviewed what I could find online and such. In the documentation I find a number of references to the “client/server” architecture but I’m not finding any particularly deep discussion of it, either in the docs or by searching on i.e., “basex client server”. When I started my Mirabel project I understood that the way to get concurrency was to use multiple BaseX HTTP instances, which can make concurrent read requests on a single set of databases. But now I can’t find the source that led me to that conclusion—I know the product docs have been reworked significantly since then, so maybe something got lost in the update? Based on my latest reading, it seems clear that in order for BaseX to best manage concurrency of reads and writes that the requests need to be within a single server instance running in a single JVM. If I’m understanding it correctly, for FAIRLOCK to enable interleaving of read and update operations it has to be operating in a single JVM, which means that having different JVMs reading from a database being updated by yet another JVM is going to be problematic because the only lock mechanism in that case is the global lock, Given that, it’s not clear how you implement a multi-user web application that needs to not block while waiting for longer-running queries to complete but still have a single server instance to satisfy the queries. So I feel like I’m missing something. In my current solution I run multiple basexhttp servers where the first server is the web app server. It uses a REST handler that inspects the load on each server and sends requests to the lowest-load server. This works but in my reading I’m starting to think that this level of complexity is not required (or maybe, more accurately, surely others would have needed the same mechanism?). In my web app I’ve implemented a general asynchronous query mechanism where I can serve web pages with elements that then trigger async requests back to the server to fetch elements (for example, I cache HTML renderings of DITA tables that are then fetched asynchronously to populate report tables that include the rendered tables). I don’t see a way to avoid this level of optimization and it’s not too complicated. This seems to work well and there are more opportunities for caching things. I’m also continuing to think about Tamara’s suggestion to use polling or web sockets to perform long-running queries asynchronously, store the results in a results database, then trigger fetching in the client (in response to an earlier question of mine about how to avoid keeping HTTP request sessions open for a long time). So my question: What is the general architecture for a web application that needs to support large numbers of concurrent users making large numbers of requests and manage updates to databases? Thanks, Eliot _____________________________________________ Eliot Kimber Sr. Staff Content Engineer O: 512 554 9368 servicenow servicenow.com<https://www.servicenow.com> LinkedIn<https://www.linkedin.com/company/servicenow> | X<https://twitter.com/servicenow> | YouTube<https://www.youtube.com/user/servicenowinc> | Instagram<https://www.instagram.com/servicenow>

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