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Fix resolution of references#2

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henrikno wants to merge 2 commits into
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henrikno:fix-reference-resolution
Open

Fix resolution of references#2
henrikno wants to merge 2 commits into
okapies:masterfrom
henrikno:fix-reference-resolution

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@henrikno

@henrikno henrikno commented Mar 9, 2020

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Resolve failed with the following exception when using references:
Exception in thread "main" com.typesafe.config.ConfigException$BugOrBroken: replace in parent not possible
or
Exception in thread "main" com.typesafe.config.ConfigException$UnresolvedSubstitution: Reader: 2: Could not resolve substitution to a value: ${a}

The docs for resolveWith says:

Note that this method does NOT look in this instance for substitution values.

Which means we can't refer to variabled in the same config.
It also says:

If you want to do that, you could either merge this instance into
your value source using Config.withFallback, or you could resolve
multiple times with multiple sources (using setAllowUnresolved).

I tried using withFallback, but the same error still occurred.
This might be due to a bug in typesafe config: lightbend/config#332 lightbend/config#499

This works around that by resolving multiple times as suggested
in the javadoc.

Fixes #1

henrikno added 2 commits March 9, 2020 16:16
Resolve failed with the following exception when using references:
Exception in thread "main" com.typesafe.config.ConfigException$BugOrBroken: replace in parent not possible

The docs for resolveWith says:
> Note that this method does NOT look in this instance for substitution values.

Which means we can't refer to variabled in the same config.
It also says:
> If you want to do that, you could either merge this instance into
> your value source using Config.withFallback,  or you could resolve
> multiple times with multiple sources (using setAllowUnresolved).

I tried using withFallback, but the same error still occurred.
This might be due to a bug in typesafe config:
lightbend/config#332

This works around that by resolving multiple times as suggested
in the javadoc.
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substitution not working inside user doc.

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