BaseX-Talk October 2010

basex-talk@mailman.uni-konstanz.de

23 participants
58 discussions

BaseX client
by Nigel Alderton 19 Oct '10

19 Oct '10

I have some beginner questions regarding BaseX Client; 1. How can I list the documents in a database? 2. Is there a way to batch BaseX Client commands up to execute several commands automatically like a DOS batch file without having to manually type them each time? 3. Is there a 'reload' command to reload a document from it's source file or do I have to use the 'add' command and specify a file? 4. Is there any documentation regarding the BaseX Client commands other than the 'help' text? Thanks, Nigel

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Re: [basex-talk] Upload xml file from client to server
by Andreas Weiler 19 Oct '10

19 Oct '10

Dear Nigel, currently the only way is to transfer the file to the server and then add the document to the database. Another way is to add xml snippets like: add as test <xml>test</xml> You could use for this our bindings, too. (see http://www.inf.uni-konstanz.de/dbis/basex/bindings) So just write your own class like seen in the example. For example (pseudo code): FileInputStream fis = new FileInputStream(file); StringBuilder sb = new StringBuilder(); sb.add(fis.readLine()); session.execute("add as test " + sb.toString()); Kind regards, Andreas Am 19.10.2010 17:00, schrieb Nigel Alderton: > Hi, > > How can I upload an xml file from a client machine to the basex server? > > After spending a couple of hours trying to use the "BaseX GUI" which > apparently is not possible, I'm now trying to use the "basex client" > instead. > > I've managed to login from the client to the server by doing; > > java -cp basex-6.2.2.jar org.basex.BaseXClient -U admin -P admin -n > 192.168.2.10 > > then creating a database; > > create db test > open test > > but when I try to upload a file by doing; > > add text.xml > > it says; > > File or directory "C:/BaseX/test.xml" not found. > > If I go to the server and create a file there called test.xml then go back > to the client and do "add text.xml" it works! So the "add" command seems to > add files on the server, not the client. > > Is it possible to add a file / document to the server from a client, or can > it only be done at the server? > > Thanks, > > Nigel > > _______________________________________________ > BaseX-Talk mailing list > BaseX-Talk(a)mailman.uni-konstanz.de > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk

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Upload xml file from client to server
by Nigel Alderton 19 Oct '10

19 Oct '10

Hi, How can I upload an xml file from a client machine to the basex server? After spending a couple of hours trying to use the "BaseX GUI" which apparently is not possible, I'm now trying to use the "basex client" instead. I've managed to login from the client to the server by doing; java -cp basex-6.2.2.jar org.basex.BaseXClient -U admin -P admin -n 192.168.2.10 then creating a database; create db test open test but when I try to upload a file by doing; add text.xml it says; File or directory "C:/BaseX/test.xml" not found. If I go to the server and create a file there called test.xml then go back to the client and do "add text.xml" it works! So the "add" command seems to add files on the server, not the client. Is it possible to add a file / document to the server from a client, or can it only be done at the server? Thanks, Nigel

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Re: [basex-talk] Client / Server
by Michael Seiferle 19 Oct '10

19 Oct '10

Hi Nigel, the GUI (apart from the Server Administration Dialog that only allows to administer users and database) only works locally. So queries or commands added in BaseX Gui are only executed in a local manner. To perform queries and retrieve results over the wire you should use the BaseX-Client. You can start it via: > $ java -cp basex.jar org.basex.BaseXClient -n <hostname> Further information on BaseXClient can be found here: http://www.inf.uni-konstanz.de/dbis/basex/server Hope this helps! Kind regards Michael Am 19.10.2010 um 14:02 schrieb Nigel Alderton: > Hi, > > I can't work out how to connect from a client to a server. > > I know that the server is running ok because I can connect to it locally > using "localhost" but I can't connect from the client. This is what I'm > doing on the client: > > 1. File menu --> Server Administration. > 2. Administrator Logon password: admin > 3. Administrator Logon hostname: 192.168.2.10 > 4. Click the Connect button. > > The message "Connected to 192.168.2.10:1984" is shown. > > If I then click on the database tab, the databases dropdown box shows "22 > databases". One of which is called "bjd". > > I then close the Server Administration dialog box and in the command line > type "open bjd" but I get "Error: Database bjd was not found." > > Help! What's going on? > > Regards > > Nigel > > > > _______________________________________________ > BaseX-Talk mailing list > BaseX-Talk(a)mailman.uni-konstanz.de > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk

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Client / Server
by Nigel Alderton 19 Oct '10

19 Oct '10

Hi, I can't work out how to connect from a client to a server. I know that the server is running ok because I can connect to it locally using "localhost" but I can't connect from the client. This is what I'm doing on the client: 1. File menu --> Server Administration. 2. Administrator Logon password: admin 3. Administrator Logon hostname: 192.168.2.10 4. Click the Connect button. The message "Connected to 192.168.2.10:1984" is shown. If I then click on the database tab, the databases dropdown box shows "22 databases". One of which is called "bjd". I then close the Server Administration dialog box and in the command line type "open bjd" but I get "Error: Database bjd was not found." Help! What's going on? Regards Nigel

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Server administration
by Nigel Alderton 19 Oct '10

19 Oct '10

Hi, Is it possible to upload an XML file to the server from one machine to another? I'm using BaseX 6.1 on Windows XP. I have a BaseX server running on 192.168.2.10 and the BaseX 6.1 user interface running on 192.168.2.101. In the Server Administration dialog box, under "Administrator Logon" the "Connect" and "Disconnct" buttons are both greyed out. I can't connect from 192.168.2.101 to 192.168.2.10. Should I be able to? Thanks, Nigel

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Re: [basex-talk] REST - adding document to database with specified name
by Christian Grün 19 Oct '10

19 Oct '10

Dear Ivan, this is one of the features which is currently discussed for the next release; additionally, you'll soon be allowed to support hierarchic collection paths, such as.. http://localhost:8984/basex/jax-rx/collection/path/to/filename.xml Some JaxRX interface issues have to be solved first to make this possible. Hope this helps, Christian On Mon, Oct 18, 2010 at 10:25 AM, <ilagunov(a)evelopers.com> wrote: > Hello, > > I've tried using RESTful API HTTP methods PUT and POST for adding a new document to the database. But it appeared to be impossible to specify the name of file to be added. > > In POST method we must specify the following URL: > http://localhost:8984/basex/jax-rx/collection > > In PUT method it's almost the same. > > The result is that the file is added with a name like "1287390239789". > > Why cannot we specify the URL this way: > http://localhost:8984/basex/jax-rx/collection/filename.xml > so that the file is added with a name filename.xml? > > Best regards, > Ivan >

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Editing in the XQuery buffer - 2 RFEs
by C. M. Sperberg-McQueen 18 Oct '10

18 Oct '10

In my use of BaseX I am regularly troubled by one minor shortcoming (as I see it :) in the interactive graphical user interface. When I am concentrating hard on formulating a query, my fingers automatically type Emacs keystrokes to move the cursor around. The result is that I end up inserting ^A, ^D, ^E, and ^K characters into the buffer. (Other Emacs users might end up with stray ^N and ^P characters, but this usually doesn't happen to me.) It would make the XQuery box in the GUI a lot more convenient for me if these keystrokes had their normal Emacs meaning there. Consider that a request for enhancement. In the meantime, I have the problem that if I type one of these characters by accident, and then move away from the location (which happens quite often, since some of these characters are often parts of sequences of cursor movements), then I get an error message from BaseX (e.g. the message now showing in my status bar, "[XPST0003] Query contains an illegal character (#1)." But there is no visual indication of where the stray character is: all of these characters are invisible in the XQuery buffer. If it were possible to make these illegal characters visible in some way (as "^A" or some kind of dot or box, for example), it would help at least those users who, like me, have Emacs keystrokes wired into their fingers. Another RFE. Thanks! Michael -- **************************************************************** * C. M. Sperberg-McQueen, Black Mesa Technologies LLC * http://www.blackmesatech.com * http://cmsmcq.com/mib * http://balisage.net ****************************************************************

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Re: [basex-talk] Dutch language file for Basex: Nederlands.lang
by Christian Grün 15 Oct '10

15 Oct '10

Thanks, Huib, for adding another language to BaseX! Yes, I allowed myself to rename your file to Dutch.lang, although Netherlandic might be somewhat more appropriate ;) We may display the original language names in future. A request to everyone: more translations are welcome! Mandarin and Spanish are on top of the list. Hartelijke groet, Christian > Hi Christian, > > I've finished translating the language file and named it Nederlands.lang. This is contrary to the other files that have an English name, so you might want to name it Dutch.lang. > > Hartelijke groet, > Huib.

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Re: [basex-talk] Bug report and question
by Christian Grün 15 Oct '10

15 Oct '10

..thanks for your feedback. I have passed to pass this on to our mailing list, as it might be of general interest. > A bug report from me. I just decided to test that REST web services work > correctly. So I did the following: > 1. Opened window client, executed simple xquery to find a document by id: > /tagname[@id='id_value'] > 2. Removed this document via browser: > http://localhost:8984/basex/jax-rx/collection?command=delete+document.xml > 3. Repeated the same xquery execution in window client. > 4. Got the following stack trace: > [...] Note that the REST/JaxRx implementation starts a server instance of BaseX, which does not communicate with the GUI version of BaseX. As a result, and for the sake of performance, the changes performed via REST won't be reflected in the visual frontend. You shouldn't encounter any problems if you stay in one world, i.e., if you do all communication with REST, or the command-line client connecting to the server instance. > BTW, could you also say if your database was successfully used in Production > systems with heavy load? We have lots of users who operate BaseX in read-only environments, and we're continuously extending our support for scenarios that depend on stable realtime updates. Indeed, BaseX is very performant when it comes to updates – it's actually much faster than most competing systems we have tested by now – which is due to the fact that we have a very low updating overhead (no indexes are updated, no backups are performed for rollbacks, etc). Instead, BaseX includes manual features to rebuild your indexes and backup/restore the data. If you want to perform some tests on your workloads, I recommend to work with the latest version of BaseX (6.2.9), which included many fixes that have optimized the stability of our update operations. Along with the next official version, you'll get better documentation on the latest features. Advanced, optional update/transaction features to further minimize the danger of losing data are on our todo list. Hope this helps, Christian ___________________________ Christian Grün University of Konstanz Department of Computer & Information Science D-78457 Konstanz, Germany Tel: +49-7531-88-4449, Fax: +49-7531-88-3577 http://www.inf.uni-konstanz.de/~gruen > Hello, > > A bug report from me. I just decided to test that REST web services work > correctly. So I did the following: > 1. Opened window client, executed simple xquery to find a document by id: > /tagname[@id='id_value'] > 2. Removed this document via browser: > http://localhost:8984/basex/jax-rx/collection?command=delete+document.xml > 3. Repeated the same xquery execution in window client. > 4. Got the following stack trace: > > Error: Possible bug? Feedback is welcome: info(a)basex.org > BaseX 6.1: > java.lang.ArrayIndexOutOfBoundsException: 19 > org.basex.util.TokenSet.key(TokenSet.java:124) > org.basex.data.Data.name(Data.java:347) > org.basex.data.Serializer.node(Serializer.java:334) > org.basex.data.Nodes.serialize(Nodes.java:207) > org.basex.data.Nodes.serialize(Nodes.java:202) > org.basex.core.proc.AQuery.query(AQuery.java:88) > org.basex.core.proc.XQuery.run(XQuery.java:23) > org.basex.core.Proc.run(Proc.java:139) > org.basex.core.Proc.exec(Proc.java:109) > org.basex.gui.GUI.exec(GUI.java:428) > org.basex.gui.GUI$5.run(GUI.java:386) > > Shouldn't it be changed to some lenient notice about the document that has > been deleted? Or simply consider this exception case and exclude the > document from results? > > BTW, could you also say if your database was successfully used in Production > systems with heavy load? We're going to use an xml database in such kind of > application with about 50000 xml documents in database and about 20000 > update/delete/insert operations successively every day. We've already faced > an issue with eXist XML database that causes huge delays on removing a > single document from a large collection (this operation takes about 30 > seconds) due to the need to maintain indexes. > > Thanks in advance!

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BaseX-Talk October 2010