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

Moving on to Java 8?
by Christian Grün 27 Sep '17

27 Sep '17

Dear all, Java 9 has just been released. As you may know, the BaseX code base is still compatible with Java 7, because version 7 is still used in the wild (we even got various user complaints when we upgraded from Java 6 just a few years ago). There are several reasons why we will move along to Java 8 in the near future: * It is more and more unsafe to use Java 7, because Oracle has stopped support two years ago. * From the developer point of view, there are only advantages when working with more recent versions of a software: newer language features and standard libraries can be used, the code base can be reduced, etc. * We would like to switch to the newest version of Jetty, which requires Java 8. Before we approach further, we are interested in hearing your reactions: Do you still work with Java 7? Would some of you require longtime support for Java 7? Thanks in advance and all the best, Christian

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BaseX continuous integration
by Tim Thompson 27 Sep '17

27 Sep '17

Hello, Does anyone have an example they could share of an app using the BaseX Unit Module deployed on a continuous integration server (preferably Travis CI)? Thanks in advance. Tim -- Tim A. Thompson Discovery Metadata Librarian Yale University Library

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Re: [basex-talk] pyBaseX url
by Bridger Dyson-Smith 26 Sep '17

26 Sep '17

Hi Andreas, On Sep 26, 2017 10:48, "Andreas Doering" <ado(a)zurich.ibm.com> wrote: Hello all, I want to use BaseX in a python environment and found PyBaseX by Luca Lilianas. Unfortunately, the email address associated with github does not seem to exist. What is not clear to me how the url has to be formatted. I tried 'http://localhost:1984:/rest/' but got timeouts. Have you tried 'http://localhost:1984/rest/'; e.g. removing the trailing ':'? I started a basexserver (with default port/user/password) and I can create and work with my example database with the the textual client from BaseX. But I could not find out how I have to format the url parameter so that the python interface works. I created a client by c = BaseXClient('http://localhost:1984:/rest/',default_database= None,user='admin',password='admin') c.connect c.create_database('TestName') The last line hangs in socket read. The log file does not show anything of that. Furthermore, it seems, that the current code in github is python2 specific, or maybe some package it depends on. I remember that during installation on python3 something broke, so I am using python2 in the moment. Any plans to port to python3? Regards, Andreas I can't speak to the python3 question, apologies. Best, Bridger

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pyBaseX url
by Andreas Doering 26 Sep '17

26 Sep '17

Hello all, I want to use BaseX in a python environment and found PyBaseX by Luca Lilianas. Unfortunately, the email address associated with github does not seem to exist. What is not clear to me how the url has to be formatted. I tried 'http://localhost:1984:/rest/' but got timeouts. I started a basexserver (with default port/user/password) and I can create and work with my example database with the the textual client from BaseX. But I could not find out how I have to format the url parameter so that the python interface works. I created a client by c = BaseXClient('http://localhost:1984:/rest/ ',default_database=None,user='admin',password='admin') c.connect c.create_database('TestName') The last line hangs in socket read. The log file does not show anything of that. Furthermore, it seems, that the current code in github is python2 specific, or maybe some package it depends on. I remember that during installation on python3 something broke, so I am using python2 in the moment. Any plans to port to python3? Regards, Andreas

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map behavior ?
by jean-marc Mercier 26 Sep '17

26 Sep '17

Hello BaseX team, It has been a while since I last wrote to this mailing list ! Happy to report again :) I have a strange behavior concerning map, it doesn't seem to sort as I expected. Is there any explanation ? let $map as map(xs:double,xs:string) := map:merge(( map:entry(xs:double(0.1), "Sunday"), map:entry(xs:double(5.0), "Thursday"), map:entry(xs:double(2.0), "Monday"), map:entry(xs:double(3.0), "Wednesday"), map:entry(xs:double(0.5), "Tuesday"), map:entry(xs:double(6.0), "Friday"), map:entry(xs:double(7.0), "Saturday") )) return $map output : map { 2: "Monday", 3: "Wednesday", 5: "Thursday", 6: "Friday", 7: "Saturday", 0.1: "Sunday", 0.5: "Tuesday" } Cheers

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OutOfMemoryError at Query#more()
by Simon Chatelain 22 Sep '17

22 Sep '17

Hello, I am facing an issue while retrieving some big amount of XML documents from a BaseX collection. Each document (as an XML file) is around 10 KB, and in the problematic case I must retrieve around 70000 of them. I am using Session#query(String query) then Query#more() and Query#next() to iterate through the result of my query. try (final Query query = l_Session.query(“query”)) { while (query.more()) { String xml = query.next(); } } If there is more than a certain amount of XML document in the result of my query I get a OutOfMemoryError (full stack trace in attached file) when executing query.more(). I did the test with BaseX 8.6.6 and 8.6.7, Java 8, VM arguments –Xmx1024m Increasing the Xmx value is not a solution as I don’t know what the maximum amount of data I will have to retrieve in the future. So what I need is a reliable way of executing such queries and iterate through the result without exploding the heap size. I also try to use QueryProcessor and QueryProcessor#iter() instead of Session#query(String query). But is it safe to use it knowing that my application is multithreaded and that each thread has its own session to query or add elements from/to multiple collections? Moreover, for now all access to BaseX are done through a session, so my application can run with an embedded BaseX or with a BaseX server. If I start using QueryProcessor, then it will be embedded BaseX only, right? I also attached a simple example showing the problem. Any advice would be much appreciated Thanks Simon

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Server Variables, cached vars, etc
by Erik Peterson 21 Sep '17

21 Sep '17

How can I create a variable that is evaluated only once but accessed across many RestXQ requests and sessions. I'm trying to cache data that comes from an integration with an expensive operation. Does BaseX support something similar to server variables like Mark Logic?

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BaseX 8.6.7
by Christian Grün 21 Sep '17

21 Sep '17

Hi all, As we’ll tackle BaseX 8.7 in the next weeks, we’ve released yet another patch release today [1]. As usual, it contains minor performance tweaks (better typing in FLWOR expressions) and bug fixes (pre-evaluation of fn:tail, GUI XQuery highlighting). Have fun, Christian [1] http://basex.org/download/

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DBA deployed on JBoss (Wildfly)
by Marco Lettere 21 Sep '17

21 Sep '17

Hi all, We created an application web app based on the BaseX .WAR distribution. If we deploy it under tomcat we can access all DBA related functionalities after the login prompt. If we try to do the same under WildFly 10, the application starts without errors but trying to access the DBA pages the browser is just bounced back to the login page. Please check the snippets at [1] and [2] to observe the behaviour reflected in the log files. After arriving to the final page one more request to login?path=databases is received. Is there anyone having experience with running BaseX under Jboss / Wildfly? Thanks a lot, Marco. [1] Tomcat DBA login 18:49:13.754 0:0:0:0:0:0:0:1:55352 admin 302 76.47 ms 18:49:13.754 0:0:0:0:0:0:0:1:55352 admin 200 0.1 ms 18:49:13.756 0:0:0:0:0:0:0:1:55352 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/databases 18:49:13.778 0:0:0:0:0:0:0:1:55352 admin 302 21.5 ms 18:49:13.778 0:0:0:0:0:0:0:1:55352 admin 200 0.08 ms 18:49:13.780 0:0:0:0:0:0:0:1:55352 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/login?path=databases 18:49:13.792 0:0:0:0:0:0:0:1:55352 admin 200 11.91 ms 18:49:13.806 0:0:0:0:0:0:0:1:55352 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/style.css 18:49:13.808 0:0:0:0:0:0:0:1:55353 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/js.js 18:49:13.821 0:0:0:0:0:0:0:1:55352 admin 200 15.94 ms 18:49:13.824 0:0:0:0:0:0:0:1:55353 admin 200 16.12 ms 18:49:13.827 0:0:0:0:0:0:0:1:55352 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/basex.svg 18:49:13.841 0:0:0:0:0:0:0:1:55352 admin 200 14.16 ms 18:49:50.466 0:0:0:0:0:0:0:1:55510 admin REQUEST [POST] http://localhost:8080/mywebapp/dba/login-check 18:49:50.537 0:0:0:0:0:0:0:1:55510 admin INFO DBA user was logged in: admin 18:49:50.537 0:0:0:0:0:0:0:1:55510 admin 302 71.72 ms 18:49:50.537 0:0:0:0:0:0:0:1:55510 admin 200 0.09 ms 18:49:50.540 0:0:0:0:0:0:0:1:55510 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/databases 18:49:50.577 0:0:0:0:0:0:0:1:55510 admin 200 37.53 ms 18:49:50.591 0:0:0:0:0:0:0:1:55510 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/style.css 18:49:50.594 0:0:0:0:0:0:0:1:55511 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/js.js 18:49:50.605 0:0:0:0:0:0:0:1:55510 admin 200 14.41 ms 18:49:50.607 0:0:0:0:0:0:0:1:55511 admin 200 12.49 ms 18:49:50.613 0:0:0:0:0:0:0:1:55511 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/basex.svg 18:49:50.622 0:0:0:0:0:0:0:1:55511 admin 200 9.8 ms [2] Wildfly DBA login 18:57:29.915 127.0.0.1:57601 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/ 18:57:30.594 127.0.0.1:57601 admin 302 681.49 ms 18:57:30.594 127.0.0.1:57601 admin 200 0.18 ms 18:57:30.599 127.0.0.1:57601 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/databases 18:57:30.660 127.0.0.1:57601 admin 302 61.28 ms 18:57:30.660 127.0.0.1:57601 admin 200 0.1 ms 18:57:30.663 127.0.0.1:57601 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/login?path=databases 18:57:30.684 127.0.0.1:57601 admin 200 20.65 ms 18:57:30.699 127.0.0.1:57602 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/js.js 18:57:30.699 127.0.0.1:57601 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/style.css 18:57:30.718 127.0.0.1:57601 admin 200 19.23 ms 18:57:30.721 127.0.0.1:57602 admin 200 21.71 ms 18:57:30.723 127.0.0.1:57601 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/basex.svg 18:57:30.745 127.0.0.1:57601 admin 200 22.75 ms 18:57:50.379 127.0.0.1:57601 admin REQUEST [POST] http://localhost:8080/mywebapp/dba/login-check 18:57:50.442 127.0.0.1:57601 admin INFO DBA user was logged in: admin 18:57:50.442 127.0.0.1:57601 admin 302 63.28 ms 18:57:50.442 127.0.0.1:57601 admin 200 0.1 ms 18:57:50.446 127.0.0.1:57601 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/databases 18:57:50.463 127.0.0.1:57601 admin 302 17.4 ms 18:57:50.463 127.0.0.1:57601 admin 200 0.09 ms 18:57:50.466 127.0.0.1:57601 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/login?path=databases 18:57:50.476 127.0.0.1:57601 admin 200 10.89 ms 18:57:50.490 127.0.0.1:57602 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/js.js 18:57:50.493 127.0.0.1:57601 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/style.css 18:57:50.502 127.0.0.1:57602 admin 200 11.72 ms 18:57:50.505 127.0.0.1:57601 admin 200 12.17 ms 18:57:50.509 127.0.0.1:57602 admin REQUEST [GET] http://localhost:8080/mywebapp/dba/static/basex.svg 18:57:50.523 127.0.0.1:57602 admin 200 13.51 ms

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Library for BaseX
by Eliúd Santiago Meza y Rivera 20 Sep '17

20 Sep '17

Hi! I've been using BaseX for a while mainly for personal purpose and I have written this library to read and make simple updates for Open Office Open Workbook files (Excel files), I hope someone could find it useful, and all comments are welcome. I leave the link below: https://github.com/eliudmeza/OOXML-Library-XQuery-BaseXdb Regards! -- LSC Eliud Santiago Meza y Rivera

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