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5250 discussions

Re: [basex-talk] Loading XML file as an InputStream in BaseX
by Christian Grün 29 Apr '16

29 Apr '16

Hi Isuru, I have attached a little example to this mail (in which the result will be streamed as well). Hope this helps Christian On Fri, Apr 29, 2016 at 6:23 AM, Isuru Ranawaka <isurur(a)wso2.com> wrote: > Hi Christian, > > We are in the process of evaluating BaseX as a XPath engine that can be > used inside our products. But samples that we have seen are only for > evaluating XQuery against a XML Document. Do you have any sample or way > that we can evaluate XPath against a InputStream. Because we cannot convert > incoming stream in to a document and read it again it will have huge > overhead. It will be great if you can provide sample code or reference that > can be refer to. > > thanks > > On Thu, Apr 28, 2016 at 11:11 PM, Christian Grün < > christian.gruen(a)gmail.com> wrote: > >> Hi Pubudu, >> >> Streaming may be a non-trivial task. Before thinking about pipelining >> input data, I would first be interested if data transmission will really be >> a potential bottleneck. Have you already done som profiling? >> >> Cheers, >> Christian >> >> >> >> On Thu, Apr 28, 2016 at 10:45 AM, Pubudu Fernando <pubuduf(a)wso2.com> >> wrote: >> >>> Hi, >>> >>> I was going through the sample file given at [1]. Here, the XML file is >>> taken from a file. Is there any way of giving the XML as a stream instead? >>> The requirement is to use XPath expressions on an XML payload that comes >>> with an HTTP request (the payload will be available to consume, as an >>> InputStream) to check whether the payload contains some given text/data. >>> >>> I also had a look at [2]. Is this approach valid only for common types >>> like integer, string etc? >>> >>> [1] - >>> https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/o… >>> [2] - >>> https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/o… >>> >>> Thanks >>> -- >>> *Pubudu Fernando* >>> Software Engineer - Intern >>> WSO2 Inc. >>> m: +94 77 888 2543 >>> >>> <https://lk.linkedin.com/in/pubuduf> <http://blog.pubudu.xyz/> >>> <https://github.com/pubudu91> >>> <http://stackoverflow.com/users/4329912/pubudu> >>> >>> >> > > > -- > Best Regards > Isuru Ranawaka > M: +94714629880 > Blog : http://isurur.blogspot.com/ >

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Loading XML file as an InputStream in BaseX
by Pubudu Fernando 28 Apr '16

28 Apr '16

Hi, I was going through the sample file given at [1]. Here, the XML file is taken from a file. Is there any way of giving the XML as a stream instead? The requirement is to use XPath expressions on an XML payload that comes with an HTTP request (the payload will be available to consume, as an InputStream) to check whether the payload contains some given text/data. I also had a look at [2]. Is this approach valid only for common types like integer, string etc? [1] - https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/o… [2] - https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/o… Thanks -- *Pubudu Fernando* Software Engineer - Intern WSO2 Inc. m: +94 77 888 2543 <https://lk.linkedin.com/in/pubuduf> <http://blog.pubudu.xyz/> <https://github.com/pubudu91> <http://stackoverflow.com/users/4329912/pubudu>

2 1

function-lookup with "db:replace" (8.4 -> 8.4.3)
by Wiemer, Sebastian 27 Apr '16

27 Apr '16

2 1

Print local time
by Mike Cobo 27 Apr '16

27 Apr '16

Hi all I want to print the current date and time on a HTML page using XQuery's format-dateTime function. The problem is that I always get the GMT time which currently is 2 hours behind of Central Europe Time. This is what my code looks like: <p>Stand vom {format-dateTime(current-dateTime(), '[D01].[M01].[Y0001] [H01]:[m01]:[s01]', 'de')} Uhr</p> And this is what I get when local time is 15:21:34: Stand vom 27.04.2016 13:21:34 Uhr Is it possible to get the local time using format-dateTime? Thanks for any help! Mike

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XPath Java examples for BaseX
by Pubudu Fernando 27 Apr '16

27 Apr '16

Hi All, Are there any samples on evaluating and processing XPath expressions using BaseX in Java? I had a look at [1], but there only seem to be XQuery examples? [1] - http://docs.basex.org/wiki/Java_Examples Thanks -- *Pubudu Fernando* Software Engineer - Intern WSO2 Inc. m: +94 77 888 2543 <https://lk.linkedin.com/in/pubuduf> <http://blog.pubudu.xyz/> <https://github.com/pubudu91> <http://stackoverflow.com/users/4329912/pubudu>

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Cascaded Treemaps
by Carl Witt 26 Apr '16

26 Apr '16

Hello everyone, I’m an occasional user of BaseX and I like the program very much. One thing that could be improved is the treemap view. Cascaded tree maps have been proposed for better visualization of the nesting structure [1]. An example is available here [2]. I think this could help exploring the structure of XML documents better. For example, I think it takes a little too much practice and attention to the nuances to construct the tree on the right from the tree map on the left. Great software, though. Best, Carl Witt [1] Lü, Hao, and James Fogarty. "Cascaded treemaps: examining the visibility and stability of structure in treemaps." Proceedings of graphics interface 2008. Canadian Information Processing Society, 2008. [2] http://bl.ocks.org/nitaku/142545ea7bac1866327a <http://bl.ocks.org/nitaku/142545ea7bac1866327a>

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Function must not be updating error in 8.4.3 (not in 8.4.2)
by Marc van Grootel 26 Apr '16

26 Apr '16

Hi, I'm sorry for the vague report. I can do more digging but it's happening deep inside some code and it's hard to pinpoint. In 8.4.3 I get the following error message: [XPTY0004] Function must not be updating: %updating function($result,$tran.... In 8.4.2 and before the same code works as expected. What I can say that it's happening in a fold-left function which in it's body uses an xslt transform (using Saxon). I have MIXUPDATES=true. I'm not touching the database inside this code but I can say that the fn call in which the fold-left is located does contain a couple of db:* functions (but they are not in the active code path). That's all I can offer at the moment. I'm happy to do some more digging later but I wanted to post this just in case it gives someone a hunch and it's only introduced since 8.4.2. Also tried 8.4.4-SNAPSHOT and there it's broken too. Cheers, --Marc

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Runtime Exception
by Mansi Sheth 25 Apr '16

25 Apr '16

Hello, My current BaseXDB is at 920GB, with ~230 databases... I run jetty server visa basexhttp script with giving it explicit 30GB of RAM. While trying to access a query, thru REST api via XQUERY, I get below error. HTTP/1.1 400 Bad Request^M Content-Type: text/plain;charset=UTF-8^M Content-Length: 4207^M Server: Jetty(8.1.16.v20140903)^M ^M Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 8.2.3 Java: Oracle Corporation, 1.7.0_95 OS: Linux, amd64 Stack Trace: java.lang.RuntimeException: *Data Access out of bounds:* *- pre value: 126882320* *- #used blocks: 495643* *- #total locks: 495643* *- access: 495642 (495643 > 495642]* at org.basex.util.Util.notExpected(Util.java:60) at org.basex.io.random.TableDiskAccess.cursor(TableDiskAccess.java:458) at org.basex.io.random.TableDiskAccess.read1(TableDiskAccess.java:148) at org.basex.data.Data.kind(Data.java:306) at org.basex.query.value.node.DBNode.<init>(DBNode.java:51) at org.basex.query.value.seq.DBNodeSeq.itemAt(DBNodeSeq.java:68) at org.basex.query.value.seq.DBNodeSeq.itemAt(DBNodeSeq.java:22) at org.basex.query.value.seq.Seq$1.next(Seq.java:77) at org.basex.query.expr.path.IterPath$1.next(IterPath.java:58) at org.basex.query.expr.path.IterPath$1.next(IterPath.java:36) at org.basex.query.MainModule$1.next(MainModule.java:114) at org.basex.query.func.StandardFunc.cache(StandardFunc.java:384) at org.basex.query.func.xquery.XQueryEval.eval(XQueryEval.java:129) at org.basex.query.func.xquery.XQueryEval.eval(XQueryEval.java:59) at org.basex.query.func.xquery.XQueryEval.value(XQueryEval.java:49) at org.basex.query.expr.gflwor.GFLWOR.value(GFLWOR.java:77) at org.basex.query.QueryContext.value(QueryContext.java:421) at org.basex.query.expr.gflwor.Let$LetEval.next(Let.java:187) at org.basex.query.expr.gflwor.GFLWOR$1.next(GFLWOR.java:95) at org.basex.query.MainModule$1.next(MainModule.java:114) at org.basex.core.cmd.AQuery.query(AQuery.java:91) at org.basex.core.cmd.XQuery.run(XQuery.java:22) at org.basex.core.Command.run(Command.java:398) at org.basex.http.rest.RESTCmd.run(RESTCmd.java:99) at org.basex.http.rest.RESTQuery.query(RESTQuery.java:74) at org.basex.http.rest.RESTRun.run0(RESTRun.java:41) at org.basex.http.rest.RESTCmd.run(RESTCmd.java:65) at org.basex.core.Command.run(Command.java:398) at org.basex.core.Command.execute(Command.java:100) at org.basex.core.Command.execute(Command.java:123) at org.basex.http.rest.RESTServlet.run(RESTServlet.java:22) at org.basex.http.BaseXServlet.service(BaseXServlet.java:64) at javax.servlet.http.HttpServlet.service(HttpServlet.java:848) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:503) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) at org.eclipse.jetty.server.Server.handle(Server.java:370) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494) at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) at java.lang.Thread.run(Thread.java:745) -- - Mansi

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Restxq and java
by meumapple 22 Apr '16

22 Apr '16

Hi, I have developed a restxq service, which executes a command via the process module. The command is actually java (java -cp ...) which actionates a linguistic parser: unfortunately the time of loading/opening of the java process is quite long (14 sec., also at the command line) even if the actual parsing is very fast. I am looking for a way to keep such a java process "open", so that a user's request can be satisfied much much quickier (while now the java process is opened and then closed for each single request). I am not sure this is a question for Basex users (the problem is only due to java), but I am not a java developer at all and I am trying to understand what can be done in this respect. Thanks! Joseph

2 3

file:read-binary error
by Maud Ingarao 20 Apr '16

20 Apr '16

Dear friends We updated 2 days ago from 8.2 to 8.4 and are experiencing a few strange things. Aside this : https://github.com/BaseXdb/basex/issues/702#issuecomment-212352923, we discovered that this kind of function doesn't work anymore : (:~ : resource function for the static files : : @param $file file or unknown path : @return rest response and binary file :) declare %rest:path('/synopsx/files/{$file=.+}') function synopsx.files:file($file as xs:string) as item()+ { let $path := $G:FILES || $file return ( <rest:response> <http:response> <http:header name='Cache-Control' value='max-age=3600,public'/> </http:response> <output:serialization-parameters> <output:media-type value='{ synopsx.files:mime-type($path) }'/> <output:method value='raw'/> </output:serialization-parameters> </rest:response>, file:read-binary($path)) }; Response : HTTP ERROR 400 Problem accessing /synopsx/files/synopsx.js. Reason: Stopped at /resource/basex/webapp/synopsx/_restxq/files.xqm, 38/10: [SEPM0017] Value of 'method' must be one of (xml,xhtml,html,json,csv,text,adaptive,basex). ------------------------------------------------------------------------ /Powered by Jetty:// /where, on my computer, an exact clone of the webapp runing with a 8.3 works perfectly and sends me my js file as expected. I read the changelogs but couldn't figure out what could be involved here. I tried to change "raw" to "adaptive" but then I get a file not found answer : HTTP ERROR 400 Problem accessing /synopsx/files/synopsx.js. Reason: Stopped at /resource/basex/webapp/synopsx/_restxq/files.xqm, 50/21: [file:not-found] '/resource/basex/webapp/synopsx/files/synopsx.js' does not exist. ------------------------------------------------------------------------ /Powered by Jetty:/// Thanks :)))) Maud PS : We're having a showcase with BaseX tomorrow at 4pm :( -- /« Ne travaillez jamais »/ *Maud Ingarao* IHRIM - UMR 5317 Institut d’histoire des représentations et des idées dans les modernités Ecole Normale Supérieure de Lyon - Site Descartes - Bureau R322 15 Parvis René Descartes - BP7000 - 69342 Lyon CEDEX 07 +33 4 37 37 65 79 - maud.ingarao(a)ens-lyon.fr http://ihrim.ens-lyon.fr http://institutdesanti.ens-lyon.fr http://ahn.ens-lyon.fr

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