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From neykov <>
Subject [GitHub] brooklyn-server issue #520: Limit parallelism of start/stop steps on Softwar...
Date Thu, 19 Jan 2017 12:55:31 GMT
Github user neykov commented on the issue:
    @sjcorbett It's generalizing `DslDeferredFunctionCall.resolve` to be reused in the newly
added code.
    When using DSL the actual value we want to resolve could be wrapped in several layers
of Suppliers. `ValueResolver` will resolve recursively until it hits a non-supplier. That's
not desirable in some situations - we are interested in the intermediate values as well. What
the above method did was to resolve iteratively until it hit a certain condition (the value
is of a specific type or is non-resolvable).
    I needed the same behaviour for the latches changes so I abstracted it in the `ValueResolverIterator`.
It will resolve the value one step at a time, returning each step of the iteration or `absent`
if there's a resolve error.
    I'll add some of this as a javadoc.

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