Handler (handler v0.2.0) View Source
A helper for running functions that might take too long, or use too much memory.
Handler will run these functions in their own process and "take care of" problematic processes.
Link to this section Summary
Functions
Run a potentially dangerous function in a safe way.
Link to this section Types
Specs
exception() :: Handler.OOM.t() | Handler.ProcessExit.t() | Handler.Timeout.t()
Specs
opts() :: keyword()
Link to this section Functions
Run a potentially dangerous function in a safe way.
Examples
iex> Handler.run(fn -> 1 + 1 end)
2
iex> Handler.run(fn -> :timer.sleep(200) end, max_ms: 10)
{:error, %Handler.Timeout{message: "Took more than 10ms to complete"}}
iex> Handler.run(fn -> Enum.map(1..10_000, & &1*100) end, max_heap_bytes: 4096)
{:error, %Handler.OOM{message: "Process tried to use more than 4096 bytes of memory"}}
iex> Handler.run(fn -> Process.exit(self(), :i_am_ded) end)
{:error, %Handler.ProcessExit{message: "Process exited with :i_am_ded", reason: :i_am_ded}}