November 2018 - BaseX-Talk - mailman.uni-konstanz.de

Issue with HTTP Server
by Shaun Flynn 09 Nov '18

09 Nov '18

Hello there, I am using BaseX 9.1, and Java version 8. When I use the basexhttp command, the server appears to start fine, but when I navigate to http:\\localhost:8984\rest, I get the following response below. What am I doing wrong? HTTP ERROR 500 Problem accessing /rest. Reason: Server Error Caused by: java.lang.NoSuchMethodError: org.basex.util.TokenBuilder.<init>(Ljava/lang/String;)V at org.basex.http.HTTPConnection.status(HTTPConnection.java:427) at org.basex.http.HTTPConnection.error(HTTPConnection.java:187) at org.basex.http.BaseXServlet.service(BaseXServlet.java:64) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:857) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:535) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1340) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1242) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.Server.handle(Server.java:503) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683) at java.lang.Thread.run(Unknown Source) ------------------------------ Powered by Jetty:// 9.4.12.v20180830 <http://eclipse.org/jetty> ------------------------------ <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_cam…> Virus-free. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_cam…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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getting the type of an arbitrary node
by Graydon Saunders 09 Nov '18

09 Nov '18

Hi! I am overcome with the cabbage-nature today, because I can't find this in the docs. I am convinced there's a way to go: (//some-element/node()) ! fn:node-type(.) and get a sequence of "element(),element(),text()..." but do not know what the actual function is called. (it's not node-type()!) How ought I to be approaching this? Thanks! Graydon

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create db with options from command line
by Günter Dunz-Wolff 08 Nov '18

08 Nov '18

Hi all, I just set up my first basex-Server on DigitalOcean. So far, everything is working, but I have no experience, how I could create db with options on the command line, I always did it with the GUI. So how is the syntax for CREATE DB xxx /path with Options - CHOP no - Indices for Text, Attributes and Tokens - Fulltext-Index with Language German, Case Sensitive and Diacritics Thanks for any help. Guenter

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Perceived performance of REST API
by Sebastian Zimmer 07 Nov '18

07 Nov '18

Hi, I'm looking for a way to increase the *perceived* performance of the REST API. On my web page there's a results list that is updated automatically when the text content of an input field is changed. This means that on each keystroke by the user, a GET request to the REST API api is sent to obtain the new results list. One GET request takes about 800 ms, which is acceptable to me given the complexity of the query and the amount of data. The problem is that when the user types faster than the queries are executed, the app starts to respond very slowly, because there are now several requests pending. BaseX seems to execute all of them in parallel and it may well take up to 14 seconds until it returns the results of the most recent search query. Is there a way to tell BaseX to abort running queries (by a specific user) to privilege the most recent query (of this user)? Could this be done with the Jobs module? Or is there a better way to implement such a search? Best regards, Sebastian -- Sebastian Zimmer sebastian.zimmer(a)uni-koeln.de <mailto:sebastian.zimmer@uni-koeln.de> Cologne Center for eHumanities <http://cceh.uni-koeln.de> DH Center at the University of Cologne @CCeHum <https://twitter.com/CCeHum>

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BaseX 9.1 on Maven Repository?
by Han (US), Paul P 07 Nov '18

07 Nov '18

Hello, Do you when the latest BaseX 9.1 release will be available from Maven Repository (https://mvnrepository.com/artifact/org.basex/basex)? Regards, Paul

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Re: [basex-talk] http-server error with version 9
by Günter Dunz-Wolff 07 Nov '18

07 Nov '18

You are wright. I’ve overseen a second WEB-INF Folder in BaseXWeb. Now with the new WEB-INF config files everything is running. Thanks a lot. > Am 06.11.2018 um 18:17 schrieb Christian Grün <christian.gruen(a)gmail.com>: > >> Then I changed the default .basex file from >> WEBPATH = /Users/gdw/basex/webapp >> to >> WEBPATH = /Users/xxx/Documents/kleist/BaseXWeb > > So I assume (see before..) that the jetty.xml and web.xml files from > your existing project need to be updated? Jetty 9 uses a different > configuration syntax, so you’ll need to compare the old and new > WEB-INF configuration files.

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Programmatically extracting function signatures
by Bridger Dyson-Smith 07 Nov '18

07 Nov '18

Hi all - I was curious if there was a way to extract function signatures from BaseX. I'm currently reading through the (excellent) wiki but was curious if there was a more automated process I might be able to use. I've been trying to think of something clever with function-lookup, but I can't seem to make it dynamic based on module namespace; e.g. ``` for $fun in function-lookup(xs:QName("archive:delete"), 1) return $fun ``` I may just grab the wiki and parse it :), but I'm also interested in changes between versions of the processor. Any thoughts or suggestions would be greatly appreciated! Best, Bridger

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Maybe interesting to you, Christian (et al)?
by Andreas Mixich 06 Nov '18

06 Nov '18

Hello Christian & Co., nothing BaseX related, and maybe totally uninteresting to you, but as it seems, you put some major efforts into the full text search, it could be one of those nerdy passions, where one is just hungry and wants more food on the topic: TRE: A Regex Engine with Approximate Matching / http://ducktape.blot.im/tre-a-regex-engine-with-approximate-matching -- Minden jót, all the best, Alles Gute, Andreas Mixich

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rest run query binding problem
by Maximilian Gärber 06 Nov '18

06 Nov '18

Hello, given the query file [1] called by http://localhost:8984/rest?run=argon/create-database.xq&DB=test-db&CHOP=no&… I get the error: Stopped at ., 3/18: [XPDY0002] No value assigned to $CHOP. When I change the value, e.g. to nono I get Invalid 'CHOP' value 'nono'; must be 'yes', 'no', or a boolean. Running on basex 9.1 [1] create-database.xq (:~ New database name. :) declare variable $DB as xs:string external; declare variable $CHOP as xs:string external; declare variable $FTINDEX as xs:string external; declare variable $TEXTINDEX as xs:string external; declare variable $ATTRINDEX as xs:string external; declare variable $TOKENINDEX as xs:string external; let $exists := db:exists($DB) let $meta := concat('~meta_', $DB) let $history := concat('~history_', $DB) return if(not($exists)) then ( db:create($meta), db:create($history), db:create($DB, (), (), map { 'chop' : $CHOP , 'ftindex' : $FTINDEX , 'textindex' : $TEXTINDEX , 'attrindex' : $ATTRINDEX , 'tokenindex' : $TOKENINDEX }) ) else ()

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http-server error with version 9
by Günter Dunz-Wolff 06 Nov '18

06 Nov '18

Hi all, I’m trying to update to version 9 of basex. Everything is OK, but I’m not able to run basexhttp. I’m getting the following message: /Users/gdw/Downloads/basex-2/bin/basexhttp ; exit; gdw-imac:~ gdw$ /Users/gdw/Downloads/basex-2/bin/basexhttp ; exit; /Users/gdw/.basex: writing new configuration file. [main] INFO org.eclipse.jetty.util.log - Logging initialized @370ms to org.eclipse.jetty.util.log.Slf4jLog [main] WARN org.eclipse.jetty.xml.XmlConfiguration - Config error at <Call name="addConnector"><Arg> <New class="org.eclipse.jetty.server.nio.SelectChannelConnector"><Set name="host"><SystemProperty name="org.basex.serverhost" default="0.0.0.0"/></Set><Set name="port"><SystemProperty name="org.basex.serverport" default="8984"/></Set><Set name="maxIdleTime">60000</Set><Set name="reuseAddress">true</Set><Set name="Acceptors">2</Set><Set name="requestHeaderSize">65535</Set></New> </Arg></Call> org.eclipse.jetty.server.nio.SelectChannelConnector logout Saving session... ...copying shared history... ...saving history...truncating history files... ...completed. [Prozess beendet] All versions till 8.6.7 are running. My system is MacOS X Mojave. Java-Version is: java version "1.8.0_191" Java(TM) SE Runtime Environment (build 1.8.0_191-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode) I hope, there is help. Thanks in advance. Guenter

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