I’m glad you all find this reflection library useful. Since I don’t know what you want to use it for….
<obligatory-disclaimer> Use this code carefully. In Roxy we use it to report an error. It’s not part of the critical execution path where performance would matter. I wouldn’t go calling this thing all over your code. It’s a useful hack, but definitely not meant to be used willy nilly. And if memory serves me correctly we discussed thoroughly whether or not to even put that code into Roxy. We ultimately did it to make developer lives easier by giving them better error messages. We figured the utility outweighed the hackery. </obligatory-disclaimer> Paxton Hare Principal Community Engineer MarkLogic Corporation<http://www.marklogic.com/> http://developer.marklogic.com<http://developer.marklogic.com/> From: <[email protected]<mailto:[email protected]>> on behalf of Rob Szkutak <[email protected]<mailto:[email protected]>> Reply-To: MarkLogic Developer Discussion <[email protected]<mailto:[email protected]>> Date: Wednesday, December 30, 2015 at 9:00 PM To: MarkLogic Developer Discussion <[email protected]<mailto:[email protected]>> Subject: Re: [MarkLogic Dev General] API to get the executing function name and the xquery file Chris, Nice find! I was able to adapt this into a quick example that I hope everyone will find useful. First, run this in query console. It will insert a "trace.xqy" module I made based off of reflection.xqy and a module to test it called "foo.xqy": xquery version "1.0-ml"; xdmp:document-insert("/foo.xqy", document{'module namespace foo = "http://marklogic.com/foo";; import module namespace trace = "http://marklogic.com/trace"; at "/trace.xqy"; declare function foo:foo() { try { fn:error(xs:QName("boom"), "") } catch($e) { trace:getTrace() } };'}), xdmp:document-insert("/trace.xqy", document{' (: Copyright 2012-2015 MarkLogic Corporation Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. :) module namespace trace = "http://marklogic.com/trace";; declare function trace:getTrace() as map:map { let $trace := map:map() let $PREVIOUS_LINE_FILE := try { fn:error(xs:QName("boom"), "") } catch($ex) { map:put($trace, "previous_line_file", fn:concat($ex/error:stack/error:frame[3]/error:uri, " : Line ", $ex/error:stack/error:frame[3]/error:line)) } let $__LINE__ := try { fn:error(xs:QName("boom"), "") } catch($ex) { map:put($trace, "line", $ex/error:stack/error:frame[2]/error:line) } let $__FILE__ := try { fn:error(xs:QName("boom"), "") } catch($ex) { map:put($trace, "file", ($ex/error:stack/error:frame[2]/error:uri, "no file")[1]) } let $__CALLER_FILE__ := try { fn:error(xs:QName("boom"), "") } catch($ex) { map:put($trace, "caller_file", ($ex/error:stack/error:frame[3]/error:uri, "no file")[1]) } return $trace };'}); Next, run this in query console to test it: xquery version "1.0-ml"; import module namespace foo = "http://marklogic.com/foo"; at "/foo.xqy"; foo:foo() It will return this output: map <http://localhost:8000/qconsole/#> <map:mapxmlns:map="http://marklogic.com/xdmp/map"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:xs="http://www.w3.org/2001/XMLSchema";> <map:entrykey="caller_file"> <map:valuexsi:type="xs:string"> no file </map:value> </map:entry> <map:entrykey="line"> <map:value> <error:linexmlns:error="http://marklogic.com/xdmp/error";> 13 </error:line> </map:value> </map:entry> <map:entrykey="file"> <map:value> <error:urixmlns:error="http://marklogic.com/xdmp/error";> /foo.xqy </error:uri> </map:value> </map:entry> <map:entrykey="previous_line_file"> <map:valuexsi:type="xs:string"> : Line 5 </map:value> </map:entry> </map:map> In practice, in your code, after importing the trace module, you could do something like this: let $trace := try { fn:error(xs:QName("boom"), "") } catch($e) { trace:getTrace() } And then you'd have a map stored in $trace with information about exactly where you are in your code. Best, Rob Rob Szkutak Associate Consultant MarkLogic Corporation [email protected]<mailto:[email protected]> Cell +1.716.562.8464 www.marklogic.com<http://www.marklogic.com> ________________________________ From: [email protected]<mailto:[email protected]> [[email protected]<mailto:[email protected]>] on behalf of Chris Grimes [[email protected]<mailto:[email protected]>] Sent: Wednesday, December 30, 2015 7:07 PM To: MarkLogic Developer Discussion Subject: Re: [MarkLogic Dev General] API to get the executing function name and the xquery file I have not used this code directly but it looks like it may be what you're after: https://github.com/marklogic/roxy/blob/master/src/roxy/lib/reflection.xqy Sent from Outlook Mobile<https://aka.ms/qtex0l> On Wed, Dec 30, 2015 at 9:22 AM -0800, "Will Thompson" <[email protected]<mailto:[email protected]>> wrote: None that I am aware of. I have seen this done, however, by throwing an exception in a try block, and using the catch block inspect the error XML to determine contextual information. try { error((), 'BOGUS-ERROR') } catch ($e) { ** get context from $e ** } -Will > On Dec 30, 2015, at 1:30 AM, Tyagi, Devesh > <[email protected]<mailto:[email protected]>> wrote: > > Hi, > > Is there an API in Marklogic 7 which can give me the context which is > executing. For example if I have a module "sample.xqy" and a function > "sample:foo()" in it, I want the API to give me at least "sample:foo()". > > Regards, > Devesh > "This e-mail and any attachments transmitted with it are for the sole use of > the intended recipient(s) and may contain confidential , proprietary or > privileged information. If you are not the intended recipient, please contact > the sender by reply e-mail and destroy all copies of the original message. > Any unauthorized review, use, disclosure, dissemination, forwarding, printing > or copying of this e-mail or any action taken in reliance on this e-mail is > strictly prohibited and may be unlawful." > _______________________________________________ > General mailing list > [email protected]<mailto:[email protected]> > Manage your subscription at: > http://developer.marklogic.com/mailman/listinfo/general _______________________________________________ General mailing list [email protected]<mailto:[email protected]> Manage your subscription at: http://developer.marklogic.com/mailman/listinfo/general
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