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https://issues.apache.org/jira/browse/TAMAYA-340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16507337#comment-16507337
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ASF subversion and git services commented on TAMAYA-340:
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Commit 7352d6ae062224a0c72f7524f43a072f9464fbb6 in incubator-tamaya's branch
refs/heads/master from [~wlieurance]
[ https://git-wip-us.apache.org/repos/asf?p=incubator-tamaya.git;h=7352d6a ]
TAMAYA-340 Bugfix for regex "\\." vs literal "."
String.replaceAll(String, String) takes a regex as its first argument,
not a literal replaceable string. The result of this is that any
single-character environment variable is converted to use the "_" key
which has special significance to the system. Tests in the extensions
repo include some that have a single character which this change should
get working again. I've included a test in this repo for that case as
well.
> Alternative property keys for environment variables
> ---------------------------------------------------
>
> Key: TAMAYA-340
> URL: https://issues.apache.org/jira/browse/TAMAYA-340
> Project: Tamaya
> Issue Type: New Feature
> Reporter: Harald Wellmann
> Assignee: Anatole Tresch
> Priority: Major
> Fix For: 0.4-incubating
>
>
> h3. Background
> Some operating systems (e.g. Windows) do not support dots in environment
> variable names.
> h3. Goals
> When looking up a config value for key {{foo.bar.blah}}, Tamaya should also
> try the fallback key {{FOO_BAR_BLAH}}.
> This is also part of the [Config JSR
> requirements|https://github.com/eclipse/ConfigJSR/blob/25edda2914155ac6b30f821f9ef13e92b7350a3a/spec/src/main/asciidoc/configsources.asciidoc],
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