Looking at the basex source code, LocalSession.close also does
context.closeDB(). So, I think you only need LocalSession.close or the try
block does it for you in your example.
Kendall
From: <basex-talk-boun...@mailman.uni-konstanz.de> on behalf of AJ Weber
<awe...@comcast.net>
Date: Friday, March 10, 2017 at 1:47 PM
To: "basex-talk@mailman.uni-konstanz.de" <basex-talk@mailman.uni-konstanz.de>
Subject: Re: [basex-talk] Simple query
OK, changing this so that the code flows like yours works much, much better. I
now return all 3 documents I expect are in the database.
FOLLOW-UP Question: How do I close the database properly with these classes?
I had been doing a context.closeDB() when shutting-down. Do I just do a
localSession.close() now? Or do I need to do both?
Thanks again!!!
On 3/10/2017 4:27 PM, AJ Weber wrote:
Well, one difference I spot is that I am opening (via the snippet I sent
before) the database BEFORE creating a LocalSession and I am using the new
Check(...).execute(context);
The "context" is kept in the object's class-level.
Your code creates the context, associates the new LocalSession with the
context, and THEN opens the existing database. (That's more akin to how a JDBC
session would go...but I did not see any java examples with this, I followed
the examples on the java page and only found LocalSession via a google search.)
There doesn't appear to be any details in the javadoc or anything I can find
regarding how to use LocalSession, so I could be off base from that pov.
-AJ
On 3/10/2017 4:18 PM, Kendall Shaw wrote:
This worked for me, where “test-local” contains a document:
Context context = new Context();
LocalSession s = new LocalSession(context);
s.execute(new Check("test-local"));
try (Query q = s.query("for $doc in collection() return $doc")) {
while (q.more()) {
System.out.println(q.next());
}
}
But, why your code isn’t working could be useful to know. It seems like there
are some details left out.
Kendall
From:
<basex-talk-boun...@mailman.uni-konstanz.de><mailto:basex-talk-boun...@mailman.uni-konstanz.de>
on behalf of AJ Weber <awe...@comcast.net><mailto:awe...@comcast.net>
Date: Friday, March 10, 2017 at 11:40 AM
To:
"basex-talk@mailman.uni-konstanz.de"<mailto:basex-talk@mailman.uni-konstanz.de>
<basex-talk@mailman.uni-konstanz.de><mailto:basex-talk@mailman.uni-konstanz.de>
Subject: Re: [basex-talk] Simple query
On 3/10/2017 2:24 PM, Kendall Shaw wrote:
Michael Seiferle gave the answer already, I think. What would collection() be
referring to? How would BaseX know what to return? Probably there is no
database specified. Presumably, in the GUI you have opened a database.
Yes, I did not include my code to open the database. There is a database open
and this does not throw an exception, it just returns no results.
In my constructor of this class there is the following code:
new Check(this.MyID).execute(context);
(MyID is a String identifying the database I want to work with exclusively with
this context passed.)
As I mentioned in a separate post, my query where matches(uri...) works
fine...every time. That query also does not have a specific collection in the
query.
Kendall
From:
<basex-talk-boun...@mailman.uni-konstanz.de><mailto:basex-talk-boun...@mailman.uni-konstanz.de>
on behalf of AJ Weber <awe...@comcast.net><mailto:awe...@comcast.net>
Date: Friday, March 10, 2017 at 6:44 AM
To: Fabrice ETANCHAUD
<fetanch...@groupefbo.com><mailto:fetanch...@groupefbo.com>,
"basex-talk@mailman.uni-konstanz.de"<mailto:basex-talk@mailman.uni-konstanz.de>
<basex-talk@mailman.uni-konstanz.de><mailto:basex-talk@mailman.uni-konstanz.de>
Subject: Re: [basex-talk] Simple query
On 3/9/2017 3:46 AM, Fabrice ETANCHAUD wrote:
Hello Aaron,
You would learn faster by using the BaseXGUI application,
You will benefit from syntax highlighting, real time execution, and hits on
function signatures.
I am trying the GUI now. It is an excellent tool!
However, issuing the same exact XQuery in the GUI returns 3 documents (which is
what I would have originally expected).
Maybe it is an issue with how I setup my query in java? Here is my code:
try (LocalSession session = new LocalSession(this.context)) {
//test
try (Query q = session.query("for $doc in collection() return
$doc")) {
while (q.more()) {
LOG.debug("RESULT: " + q.next());
}
}
}
catch (Exception e) {
LOG.error("Could not execute query " + statement, e);
}
Best regards,
Fabrice
De :
basex-talk-boun...@mailman.uni-konstanz.de<mailto:basex-talk-boun...@mailman.uni-konstanz.de>
[mailto:basex-talk-boun...@mailman.uni-konstanz.de] De la part de Aaron Weber
Envoyé : jeudi 9 mars 2017 00:31
À :
basex-talk@mailman.uni-konstanz.de<mailto:basex-talk@mailman.uni-konstanz.de>
Objet : [basex-talk] Simple query
Newbie alert.
I'm trying to get my feet wet with BaseX, and in doing so, am trying to
understand XQuery and how to apply it to a database full of documents (not just
a single document that is typically queried).
I am using Java and can post my code, but with a LocalSession, and a query, the
following produces 0 results.
For $doc in collection() return $doc
I realize there's no "where", and in the sql world that would match all. Maybe
not in XQuery?
Obviously just a test query, but I need to start somewhere. :-)
Thanks for any help!
--
AJ
