How to implement PropertyDefiner for logback to access multiple properties -


i define properties in logback.xml config file , saw implementing propertydefiner great way set properties in customizable way.

after starting implement began wonder how access value of name attribute of element within tag. i'm not seeing anyway , i'm scratching head. propertydefiner make create new implementation every single property? why not hard code it? didn't see discussion out on web.

i hope i'm not seeing , brains of stackoverflow can me out. know how this? thanks!

i found discussion: same question asked, no answer returned.

fyi: want customize how properties because pulling database. have helper class pulls properties in on server startup. these properties vary based on environment (dev, test, prod, etc.)

as of logback version 1.0.6, value of name attribute cannot accessed directly. however, nothing prevents passing value of name attribute in property of choice. example:

<define name="rootlevel" class="your.propertydefiner"> <mykey>rootlevel</mykey> </define>

where mykey property of your.propertydefiner. example:

class your.propertydefiner implements propertydefiner { string mykey; public void setmykey(string k) { this.mykey= k; } public string getpropertyvalue() { return ... } }

joran, logback's configuration framework, takes care of wiring. joran inject value of mykey element mykey property of your.propertydefiner. if curious technical details, see documentation on implicit actions , implicit actions in practice.


Comments

Post a Comment

Popular posts from this blog

javascript - backbone.js Collection.add() doesn't `construct` (`initialize`) an object -

<!doctype html public "-//w3c//dtd xhtml 1.0 strict//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-strict.dtd"> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script> <script src="http://documentcloud.github.com/underscore/underscore-min.js"></script> <script src="http://documentcloud.github.com/backbone/backbone-min.js"></script> </head> <body> <button id="cmd_create_event" name="cmd_create_event" type="button">create new `event`</button> <script type="text/javascript"> var eventmodel = backbone.model.extend({ initialize : function() { console.log("`event` initialized. id: " + this.cid); this.bind("change:status", function() { console.log(this.get("status") + " value `status`"); }); this.bind("error", function(model, e...
Read more

c++ - Accessing inactive union member and undefined behavior? -

i under impression accessing union member other last 1 set ub, can't seem find solid reference (other answers claiming it's ub without support standard). so, undefined behavior? the confusion c explicitly permits type-punning through union, whereas c++ ( c++11 ) has no such permission. c11 6.5.2.3 structure , union members 95) if member used read contents of union object not same member last used store value in object, appropriate part of object representation of value reinterpreted object representation in new type described in 6.2.6 (a process called ‘‘type punning’’). might trap representation. the situation c++: c++11 9.5 unions [class.union] in union, @ 1 of non-static data members can active @ time, is, value of @ 1 of non-static data members can stored in union @ time. c++ later has language permitting use of unions containing struct s common initial sequences; doesn't permit type-punning. to determine whether union type-punning is allowe...
Read more

php - Get uncommon values from two or more arrays -

is there function in php give array of uncommon values 2 or more arrays? for example: $array1 = array( "green", "red", "blue"); $array2 = array( "green", "yellow", "red"); .... $result = function_needed($array1, $array2,...); print_r($result); should give output: array("blue", "yellow", ...); use array_diff , array_merge : $result = array_merge(array_diff($array1, $array2), array_diff($array2, $array1)); here's demo. for multiple arrays, combine callback , array_reduce : function unique(&$a, $b) { return $a ? array_merge(array_diff($a, $b), array_diff($b, $a)) : $b; } $arrays = array( array('green', 'red', 'blue'), array('green', 'yellow', 'red') ); $result = array_reduce($arrays, 'unique'); and here's demo of that.
Read more