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From: Martin Gainty <mgainty@hotmail.com>
To: Commons Users List <user@commons.apache.org>
Subject: RE: [configuration] Calling getConfiguration on
 DefaultConfigurationBuilder more than once permitted
Date: Sat, 22 Mar 2014 19:55:43 -0400
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 =20


> Date: Sat=2C 22 Mar 2014 22:39:14 +0100
> From: dont_know@gmx.net
> To: user@commons.apache.org
> Subject: Re: [configuration] Calling getConfiguration on DefaultConfigura=
tionBuilder more than once permitted
>=20
> Hi Martin=2C
>=20
> I found a solution which fits my requirements without this ugly=20
> behaviour as described before. The trick is to configure the reloading=20
> strategy and force the reload checking in "config.xml":
> <?xml version=3D"1.0" encoding=3D"ISO-8859-1" ?>
>=20
> <configuration>
> <header>
> <result forceReloadCheck=3D"true"/>
> </header>
>=20
MG>lets find out what forceReloadCheck and what it does
MG>/commons-configuration>grep -r -l forceReloadCheck *.*
.\src\main\java\org\apache\commons\configuration\CombinedConfiguration.java
.\target\classes\org\apache\commons\configuration\CombinedConfiguration.cla=
ss

MG>forceReloadCheck has NO effect on DefaultConfigurationBuilder.getConfigu=
ration()
protected CombinedConfiguration createAdditionalsConfiguration(
            CombinedConfiguration resultConfig)
    {
        CombinedConfiguration addConfig =3D
         new CombinedConfiguration(new UnionCombiner())=3B //this will STIL=
L pull UNION of entities

        addConfig.setDelimiterParsingDisabled(resultConfig
                .isDelimiterParsingDisabled())=3B
        addConfig.setForceReloadCheck(resultConfig.isForceReloadCheck())=3B
        addConfig.setIgnoreReloadExceptions(resultConfig
                .isIgnoreReloadExceptions())=3B
        return addConfig=3B
    }
MG>if this was chess ..i have just taken your queen
MG>your move..

> </configuration>
>=20
> That just made my day :)
>=20
> Thanks for your effort
> Stefan
>=20
> Am 22.03.2014 02:17=2C schrieb Martin Gainty:
> >=20
> >
> >
> >> Date: Fri=2C 21 Mar 2014 22:45:29 +0100
> >> From: dont_know@gmx.net
> >> To: user@commons.apache.org
> >> Subject: [configuration] Calling getConfiguration on DefaultConfigurat=
ionBuilder more than once permitted
> >>
> >> Hi=2C
> >>
> >> is it permitted to call getConfiguration more than once on the same
> >> instance of DefaultConfigurationBuilder like this:
> >>
> >> DefaultConfigurationBuilder builder =3D new DefaultConfigurationBuilde=
r()=3B
> >> builder.setFile(new File("config.xml"))=3B
> >> Configuration config =3D builder.getConfiguration(true)=3B
> >> config =3D builder.getConfiguration(true)=3B
> >> config =3D builder.getConfiguration(true)=3B
> >> ...
> >>
> >> The config.xml looks like this:
> >> <?xml version=3D"1.0" encoding=3D"ISO-8859-1" ?>
> >>
> >> <configuration>
> >> <properties fileName=3D"test.properties" config-at=3D"a"/>
> >> <properties fileName=3D"test.properties" config-at=3D"b"/>
> >> <properties fileName=3D"test.properties" config-at=3D"c"/>
> >> <properties fileName=3D"test.properties" config-at=3D"d"/>
> >> <properties fileName=3D"test.properties" config-at=3D"e"/>
> >> <properties fileName=3D"test.properties" config-at=3D"f"/>
> >> <properties fileName=3D"test.properties" config-at=3D"g"/>
> >> <properties fileName=3D"test.properties" config-at=3D"h"/>
> >> <properties fileName=3D"test.properties" config-at=3D"i"/>
> >> <properties fileName=3D"test.properties" config-at=3D"j"/>
> >> </configuration>
> >>
> >> and the referenced file "test.properties" contains:
> >> a=3Da
> >> b=3Db
> >> c=3Dc
> >>
> >> I asked this question=2C because with the first call of getConfigurati=
on
> >> the "test.properties"-file is read 10 times (once for every
> >> "config-at")=2C with the second call 20 times=2C with the third call 3=
0
> >> times and so on. So in the end the program slows down and after 100
> >> calls it needs 200ms to read the properties.
> >=20
> > MG>builder.getConfiguration(true) a Union between one DB Table and anot=
her DB Table
> > MG>if you want to 'merge' 2 groups together I suggest using OverrideCom=
biner
> > MG>ConfigurationNode combine(ConfigurationNode node1=2C ConfigurationNo=
de node2)
> > MG> http://www.docjar.com/html/api/org/apache/commons/configuration/tre=
e/OverrideCombiner.java.html
> >> I'm a little bit confused because my idea was to instantiate
> >> DefaultConfigurationBuilder for performance reasons only once (as a
> >> Singleton) and call getConfiguration subsequently to read "fresh"
> >> properties.
> >>
> >> Thanks
> >> Stefan
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe=2C e-mail: user-unsubscribe@commons.apache.org
> >> For additional commands=2C e-mail: user-help@commons.apache.org
> >>
> >=20
>=20
>=20
> ---------------------------------------------------------------------
> To unsubscribe=2C e-mail: user-unsubscribe@commons.apache.org
> For additional commands=2C e-mail: user-help@commons.apache.org
>=20
 		 	   		  =

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