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A quote from the Haxl paper :
When the business logic is only concerned with reading data
from external sources and not writing, the programmer doesn’t
care about the order in which data accesses happen, since there
are no side-effects that could make the result different when the
order changes. So in this case the programmer would be entirely
happy with not having to specify either ordering or concurrency,
and letting the system perform data access in the most efficient way
possible.
Exception in thread "main" java.lang.NoClassDefFoundError: cats/FunctorFilter
libraryDependencies += "org.typelevel" %% "cats-core" % "1.0.0-MF"
libraryDependencies += "com.47deg" %% "fetch" % "0.6.3"
cats 0.9.0
which had the FunctorFilter there. We are currently working towards moving it to 1.0.0-MF
and FunctorFilter has moved to FunctorEmpty
in a new lib cats-mtl
. @peterneyens do you know how close are we to release Fetch
for cats 1.0.0-MF
?
@eranmiz132
The only way Fetch can reach out to external sources is through the fetchOne
and fetchMany
methods of DataSource
.
Can you give an example what you want to accomplish?
For the second point, there was some discussion in the posts above about just that (starting at https://gitter.im/47deg/fetch?at=599de37042d2f61025897618).
Summary: For the moment Fetch only supports fetching data