To understand the future with exceptions
I have two Futures and I want to restore exceptions on one of them:
def getId(): Future[Either[Exception, Id]] = ...
def result(): Future[Result] = ...
I'll try something like this:
for {
id <- getId()
r <- result(id, param, param)
} yield {
r
} recover {
case e => println(e.getMessage)
}
Can anyone help me?
Thank you so much.
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1 answer
You should restore in the processed shaft, not the for. In the code below, id and r values are 0 if an exception is thrown.
for {
id = getId()
id.recover {
case e => {
println(e.getMessage)
0
}
}
r = result(id, param, param)
} yield r.recover {
case e => {
println(e.getMessage)
0
}
}
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