Thanks Oliver...I'll continue down that path. Ron DiFrango Director/ Architect | Captech Solutions Architecture | Team Super Glue (Mobile) cell: (804) 855-9196| ronald.difra...@capitalone.com
-----Original Message----- From: Oliver Heger [mailto:oliver.he...@oliver-heger.de] Sent: Thursday, February 13, 2014 3:43 PM To: Commons Users List Subject: Re: Conditional Configuration Keys Hi Ron, Am 13.02.2014 21:28, schrieb DiFrango, Ronald (CONT): > Oliver, > > Thanks for that reference, and while that is somewhat helpful it means that > for each environment, we still need a separate properties file for each of > the environments and another one for the common stuff. Previously, we had > accomplished this before by conditionally loading files based upon path > within our XML file like: > > <properties > > fileName="${config.root}/test-app/environment/${config.env}/test.properties" > listDelimiter="|"> > <reloadingStrategy refreshDelay="10000" > > config-class="org.apache.commons.configuration.reloading.FileChangedReloadingStrategy" > /> > </properties> > > My hope was to find a way to do that a little bit more concisely within a > single file or as I mentioned hooking into the property loading process. your current solution based on a DefaultConfigurationBuilder and interpolated variables is more or less the recommended way for your use case. I don't think that this can be much improved. If you only use properties files, an option could be using the include directive [1] in a clever way. Here you can use variables, too. There is also the possibility to set an IOFactory on a PropertiesConfiguration. This factory is used for creating an input stream to the file to read. But it is more intended for adapting the format to be parsed and not for selecting different sets of properties. Oliver [1] http://commons.apache.org/proper/commons-configuration/userguide/howto_properties.html#Includes > > Thanks, > > Ron > > -----Original Message----- > From: Oliver Heger [mailto:oliver.he...@oliver-heger.de] > Sent: Thursday, February 13, 2014 3:14 PM > To: Commons Users List > Subject: Re: Conditional Configuration Keys > > Hi Ron, > > Am 13.02.2014 20:53, schrieb DiFrango, Ronald (CONT): >> All, >> >> I searched around and could find an answer, I have a set of properties where >> I want to conditionally select them based upon environment variables. For >> example, I have the following set: >> >> schemas.default=DB >> schemas.perf=PERF >> schemas.qa=QA >> schemas.int=INT >> >> And I would like to do something to the effect of: >> >> If (env.variable == 'qa') >> schemas=QA >> else If (env.variable == 'perf') >> schemas=PERF >> else If (env.variable == 'int) >> schemas=int >> else >> schemas=DB >> >> The way I accomplished this today is that I created an AOP interceptor that >> does this work and when the clients request "schema" it does this logic. >> >> My preference would be to handle this during property loading time. Are >> there any extensions where I could do such a thing? > > You might want to have a look at multi-tenant configurations [1]. If I > understand you correctly, this feature solves your problem. It is possible to > access different configuration sources based on interpolated properties. > System properties or environment variables can also be used to determine the > set of properties available. > > HTH > Oliver > > [1] > http://commons.apache.org/proper/commons-configuration/userguide/howto > _multitenant.html#Multi-tenant_Configurations > >> >> Thanks, >> >> Ron >> >> ________________________________________________________ >> >> The information contained in this e-mail is confidential and/or proprietary >> to Capital One and/or its affiliates. The information transmitted herewith >> is intended only for use by the individual or entity to which it is >> addressed. If the reader of this message is not the intended recipient, you >> are hereby notified that any review, retransmission, dissemination, >> distribution, copying or other use of, or taking of any action in reliance >> upon this information is strictly prohibited. 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