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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