Add back simple, optional keep-alive to libp2p-ping. #1088
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This is now a very simple option serving multiple purposes:
* It allows for stable (integration) tests involving a Swarm, which
are otherwise subject to race conditions due to the connection being
allowed to terminate at any time with `KeepAlive::No`
(which remains the default).
* It makes for a more entertaining ping example which continuously
sends pings.
* Maybe someone wants to use the ping protocol for application-layer
connection keep-alive after all.
ghost
assigned 
tomaka
approved these changes
Apr 25, 2019
twittner
approved these changes
Apr 25, 2019
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Admittedly a bit of a back-and-forth, but this is now a very simple option serving multiple purposes:
It allows for stable (integration) tests involving a Swarm, which
are otherwise subject to race conditions due to the connection being
allowed to terminate at any time with
KeepAlive::No(which remains the default).
It makes for a more entertaining ping example which continuously
sends pings.
Maybe someone wants to use the ping protocol for application-layer
connection keep-alive after all.
See also the discussion in #1086.