https://issues.apache.org/jira/browse/IVY-735 is a feature request where the
users have asked for relevant timeouts while dealing with downloads. A few
weeks back we had a very brief discussion in an unrelated mail where it was
proposed that we allow configuring these timeout all the way from ivy settings.
I have an initial proposal/attempt to implement this feature. The initial
changes are here in my personal repo[1]. It's a work in progress commit which
sets up the necessary interfaces and the flow to show what I have in mind.
Before proceeding further, I would like some inputs on whether this looks fine.
Here's a summary of what the changes are going to be:
- Each (dependency) resolver will have the ability to specify "timeout
constraints"[2].
- These timeout constraints will be specified while defining the resolver in
the ivy settings file. Imagine something like:
<ivysettings>
<resolvers>
<ibiblio ...>
<timeout-constraints connection-timeout="" read-timeout=""/>
</ibiblio>
....
- Each of the resolver will then use these timeout constraints (if specified)
while resolving the module descriptor and downloading the artifacts and dealing
with those resources.
- The absence of the timeout constraints will let the resolvers behave the way
they do currently
The changes in the linked commit deprecate some APIs which weren't using
timeouts and are replaced by APIs which pass along (an optional)
TimeoutConstraints[2].
In summary, the change being proposed is that (dependency) resolvers have the
ability to specify these timeout constraints and then use them while dealing
with module descriptors and artifacts. One thing I have (to some extent
intentionally) left out is the ability to define a global Ivy settings level or
"all resolvers" level timeout-constraints. That's because I'm not too sure if
it adds much value instead of defining it at individual resolver level. I'm
however open to adding that support as well.
The linked commit currently doesn't have the necessary support for parsing
these additional XML elements, but if this whole approach looks fine, I will
take this further and make sure things work as expected.
[1]
https://github.com/jaikiran/ant-ivy/commit/e501d9deca78db8b934f8a2710ebcfeaeb1456c8
[2]
https://github.com/jaikiran/ant-ivy/commit/e501d9deca78db8b934f8a2710ebcfeaeb1456c8#diff-cd8ed454a52f4afa779574f5600a0ccb
-Jaikiran
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