Just to close the loop on this, the behavior of try/catch with xdmp:document-load is not a bug in this context. It is error that does not occur until commit time, and at that time the query has completed and is no longer catchable. Some errors for xdmp:document-load are catchable (for example, if the file does not exist), but errors that do not occur until commit time are not catchable. So the example in the doc is reasonable, but will not catch the non-utf8 errors.
If you want to catch errors like this, wrap the xdmp:document-load statement in an xdmp:eval and put the try/catch around the eval. -Danny From: [email protected] [mailto:[email protected]] On Behalf Of Tim Meagher Sent: Tuesday, July 06, 2010 2:04 PM To: 'General Mark Logic Developer Discussion' Subject: Re: [MarkLogic Dev General] try-catch block seemingly notworking with xdmp:document-load() error Thanks for the heads-up. I used the wrong encoding to test the try-catch block. I'm seeing some other errors my testing as well. Interestingly enough the documentation for the try-catch block uses xmp:document-load for the example: http://developer.marklogic.com:8040/4.1doc/docapp.xqy#display.xqy?fname=http://pubs/4.1doc/xml/xquery/enhanced.xml%2334280 Tim ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Danny Sokolsky Sent: Tuesday, July 06, 2010 4:50 PM To: General Mark Logic Developer Discussion Subject: Re: [MarkLogic Dev General] try-catch block seemingly notworking with xdmp:document-load() error Hi Tim, You should be able to do the same thing you were doing with document-load with document-get + document-insert, it will just be an extra line or 2 of code. It should be roughly the same amount of work for MarkLogic, too, as that is essentially what xdmp:document-load does. Something like; let $uri := "some-uri" let $node := try{ xdmp:document-get( .....rest of code here.... } catch ($e) { ...do something here... } return xdmp:document-insert($uri, $node) As to why document-load cannot catch the exception, I am not 100% sure. It might be a bug or there might be some reason it works that way, maybe because the document-load call does not see the error until commit time when it is too late to catch. I filed a bug on the MarkLogic end to sort that out. But the workaround should be OK I think, and might actually be preferable as it catches the problem earlier. In the catch, for example, you can try another encoding. Depending on your content, trying ISO-8859-1 for the encoding when it fails UTF-8 might solve the problem for some significant % of your data (if you are lucky....). -Danny From: [email protected] [mailto:[email protected]] On Behalf Of Tim Meagher Sent: Tuesday, July 06, 2010 1:34 PM To: 'General Mark Logic Developer Discussion' Subject: Re: [MarkLogic Dev General] try-catch block seemingly not working with xdmp:document-load() error Hi Danny, Interesting - I tested it with xdmp:document-get and it successfully catches the error. I wrap the call to xdmp:document-load in an http application and feed it the necessary options via an HTTP Post, so the advantage of using xdmp:document-load is that I can invoke it via HTTP from an XCC app without having to obtain and then rewrite the content using document-insert. It would be much more advantageous if xdmp:document-load trapped the error, but I suppose I can add a test using xdmp-document-get as a prerequisite just to trap such errors prior to invoking xdmp:document-load. What would it take for MarkLogic to trap this error in xdmp:document-load? Is this a bug? Thanks! Tim ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Danny Sokolsky Sent: Tuesday, July 06, 2010 4:18 PM To: General Mark Logic Developer Discussion Subject: Re: [MarkLogic Dev General] try-catch block seemingly not working with xdmp:document-load() error Hi Tim, I'm not sure if this will help, but that error appears to be catchable in xdmp:document-get, so you should be able to do this using xdmp:document-get instead. The combination of xdmp:document-get + xdmp:document-insert is pretty much the same as xdmp:document-load. -Danny From: [email protected] [mailto:[email protected]] On Behalf Of Tim Meagher Sent: Tuesday, July 06, 2010 12:57 PM To: 'General Mark Logic Developer Discussion' Subject: [MarkLogic Dev General] try-catch block seemingly not working with xdmp:document-load() error Hi Folks, I wrapped an xdmp:document-load() in a try-catch block but it doesn't catch the error and allow me to take corrective action. I experimented with it in cq and still get an error, for example, given the following query: try { let $uri := "/base-uri/docname.xml" let $url := "http://[server]/[docpath]/docname.xml"; let $options := <options xmlns="xdmp:document-load" > <uri>{$uri}</uri> </options> let $properties := <properties> <datetime>2010-07-06-04:00</datetime> </properties> return xdmp:document-load($url, $options) } catch($e) { "Problem loading file, received the following exception: ", $e } The result is as follows: query evaluated in fabrication at Modules:/ as 1.0-ml (cq v4.1-1) [1.0-ml] XDMP-DOCUTF8SEQ: xdmp:eval("try { let $uri := ":/base-uri/...", (), <options xmlns="xdmp:eval"><database>10474121819804666683</database><modules>15178358166571...</options>) -- Invalid UTF-8 escape sequence at http://[server]/[docpath]/docname.xml line 68 -- document is not UTF-8 encoded Stack trace: in /eval.xqy line 111: I expected the error to begin with: "Problem loading file, received the following exception: " Tim Meagher
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