BaseX-Talk

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6 participants
5250 discussions

BaseX as a Windows Service
by Sam Eklund 23 Jan '14

23 Jan '14

Is there a possibility to install BaseX server as a service under Windows? The -S switch to start BaseX in the background is nice, however a proper windows service would be even better! Anyone that has accomplished this? Best regards, Sam

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XMLPrague, BaseX User Meeting
by Christian Grün 20 Jan '14

20 Jan '14

Dear all, we are pleased to give you the agenda for our BaseX User Meeting! As a little surprise, we can announce Michael Sperberg McQueen as additional speaker! This is the current list of speakers and talks: _ SESSION 1 _______ • 14:30 Christian Grün: BaseX: 12 Months, 12 Updates • 15:00 Michael Sperberg McQueen: Using BaseX for Off-the-cuff Queries • 15:30 Lars Johnsen: BaseX as a Corpus Tool _ SESSION 2 _______ • 16:30 Gerrit Imsieke: Using BaseX with RESTXQ as the Storage Back-end for a Web-based XML Editor • 16:55 Jean-Marc Mercier: Data Heterogeneity with XQUERY++ and BaseX • 17:20 Yoann Maingon: BaseX for Rapid Minimum Viable Product Prototyping • 17:45 Open Discussion The list may be subject to updates; the latest version will be found here: http://www.xmlprague.cz/preconf2014 http://lanyrd.com/2014/basex Conference tickets are still available. Spread the word! We are looking forward to meeting you in Prague, Christian

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Paging takes time.
by Geet Gangwar 20 Jan '14

20 Jan '14

Hi, I have huge XML document containing around 70000000 child nodes. I want to implement paging on this, so that I can fetch a chunk of nodes at time, but as the start position value increases from 10000000 the execution time takes more than a second to execute, is there a any optimized way I can follow. I have written following code: public class XQJ { public static void main(String[] args) throws XQException { XQDataSource xqs = new BaseXXQDataSource(); xqs.setProperty("serverName", "localhost"); xqs.setProperty("port", "1984"); // Change USERNAME and PASSWORD values XQConnection conn = xqs.getConnection("admin", "admin"); XQPreparedExpression xqpe = conn.prepareExpression("declare namespace xbrli=' http://www.xbrl.org/2003/instance';" + " declare variable $doc as xs:string external;" + " declare variable $start as xs:integer external;" + " declare variable $pageSize as xs:integer external;" + " let $allMatches := doc($doc)/xbrli:xbrl/*" + " return subsequence($allMatches,$start,$pageSize)"); // " return $matches"); xqpe.bindString(new QName("doc"), "1389962424906/1389962424906/facts.xml", null); int totalRecords = 70000000; int pageSize = 10000; int noOfPages = totalRecords/pageSize; long startTime = 0; int start = 0; for(int i=0; i<noOfPages; i++){ startTime = System.currentTimeMillis(); start = i*pageSize; xqpe.bindInt(new QName("start"), start, null); xqpe.bindInt(new QName("pageSize"), pageSize, null); XQResultSequence rs = xqpe.executeQuery(); // while(rs.next()){} // System.out.println(rs.getItemAsString(null)); // System.out.println(start + " : " + (System.currentTimeMillis()-startTime)); } System.out.println(start + " : " + (System.currentTimeMillis()-startTime)); conn.close(); }

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small bug in Basex
by Rob Stapper 20 Jan '14

20 Jan '14

Hi, While studying Leo's "Higher-Order XQuery Modules" I encountered a small bug in Basex. Probably a wrongly timed initialization of an internal locationpath-variable. If Basex starts with an editor-window active that contains a query with a doc-statement that contains a relative path, than when directly running this query triggers an error, see attachement: basex-error.txt. Leo's dijkstra-query also suffers from it. Regards, Rob Stapper PS. Leo's modules made me understand programming functional data structures in Basex. Thanx for that. --- Dit e-mailbericht bevat geen virussen en malware omdat avast! Antivirus-bescherming actief is. http://www.avast.com

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RESTXQ & forward
by Marco Lettere 19 Jan '14

19 Jan '14

Hi all, I'm currently using a pattern where I POST to a rather generic restxq function that performs some pre-validation on the POST body. At that point, according to information I get from the request (path, headers) I call a subsequent more specific function through the <forward/> construct. It works nicely up to the access to the POST content which appears to be consumed defintely by the first function. Actually I get the following error at the called function: [BASX0003] Input could not be converted: "POST.xml" (Line 1): No input found. I don't see in the docs any way I can get forward to pass ahead the bost body and I thought it should be natural ... what am I missing? Regards, Marco Lettere. P.S. I'm using basex 7.7.

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HTTP Module - digest authentication plans?
by Hans-Juergen Rennau 19 Jan '14

19 Jan '14

Dear BaseX team, are there any plans for supporting digest authentication? In my opinion this would be a minor breakthrough for the applicability of BaseX in typical enterprise environments (or at least in mine...), where many services require digest authentication. Support would mean that, for example, very lightweight BaseX scripting can be used for integration tasks and service testing. Another way to put it: highly valuable (and presently via XQuery inaccessible) information would be integrated into the information space on which to operate without further ado - just writing a BaseX script. Hence my strong interest. Kind regards, Hans-Jürgen

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Detect Basex Query Type
by Alireza 17 Jan '14

17 Jan '14

Hi, We would like to detect if a basex query is read query or update query and then only allow read user queries to be executed. We receive a user query from an incoming request like this: http://host:port?query= "xquery" The goal is to check if "xquery" in the url above is a read or update query. We thought about checking the content of the query string and look for update operation keywords such |||||||||||| as insert, delete, etc. Is there any other better way to do that? Best, Alireza

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Limitation on the number of accessed databases
by Fabrice Etanchaud 17 Jan '14

17 Jan '14

Dear all, Is there a limitation on the number of accessed databases via db :xxx functions ? Best regards, Fabrice Etanchaud Questel/Orbit

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Re: [basex-talk] BaseX-Talk Digest, Vol 49, Issue 34
by iClays 17 Jan '14

17 Jan '14

I'm a software engineer who happens to use basex for our content management system. We current use the embedded basex option with Java. There is currently one apache tomcat server to one basex database. Now we are at position of using load balancing where we could have multiple tomcat servers talking to one basex database. Essentially, lets say we have 5 tomcat servers, we will have only one server writing to the only one basex database and the rest of the 4 tomcat servers reading from it. The problem is, after creating the 5 servers and configuring apache httpd server to have a load balancer, we notice a situation in which the first tomcat server opens the basex database and locks it from the rest of the servers access. Any attempt from tomcat server 2 to 4 to open the same database causes exception. How can we resolve this issue? Is there any simple approach to resolving this or BaseX is not designed for this purpose (i.e. one basex database being able to support multiple servers). Also is there a way of making the rest of the tomcat servers have only read access so it doesn't throw exception, etc? Please help.Thanks.

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Variable value nulled when passed to an xsl (smaller DB)
by France Baril 16 Jan '14

16 Jan '14

Hi, I am using BaseX 7.8 beta 3b557bd. When I pass a variable where the value is provided by a function ( *let **$string-variable* := *freeze-test:get-localized-string*('en-us', 'application')) that extracts the data from the database, I cannot pass it as a parameter to an xslt. It nulls the value. I attached a code sample and a simple database that holds a single file. In the sample, if you replace the line : *let **$string-variable* := *freeze-test:get-localized-string*('en-us', 'application') with *let **$string-variable := *'application', you'll notice that the value is output correctly. The issue is not with getting the value. When using the original variable setting (*let **$string-variable* := *freeze-test:get-localized-string*( 'en-us', 'application')), the debug line (*let* *$debug* := *file:write*( 'debug-string-var.txt', *$string-variable*)) does output the extracted value in the .txt file correctly, which means the variable $string-variable has been set, it just doesn't survive being passed as a parameter to xslt:transform. Note that this used to work in BaseX 7.7.2. The fact that the variable gets nulled is a completely new phenomena. To access the test function: http://localhost:8984/test/xsl-params Thanks, France P.S. You can disregard the previous request with larger files (sent to the moderator by the mail server). It looks like old files were still indexed, weighting on the DB size. -- France Baril Architecte documentaire / Documentation architect france.baril(a)architextus.com (514) 572-0341

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