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Set HEUREMPHASIS automatically for MOI callbacks #320

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Set HEUREMPHASIS automatically for MOI callbacks #320

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10 changes: 3 additions & 7 deletions src/MOI/MOI_wrapper.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -3087,14 +3087,10 @@ end
function MOI.optimize!(model::Optimizer)
# Initialize callbacks if necessary.
if check_moi_callback_validity(model)
pInt = Ref{Cint}()
ret = XPRSgetintcontrol(model, XPRS_HEURSTRATEGY, pInt)
# Disable heuristics. There numerous cases where the heuristics ignore
# our callbacks.
ret = XPRSsetintcontrol(model, XPRS_HEUREMPHASIS, 0)
_check(model, ret)
if model.moi_warnings && pInt[] != 0
@warn(
"Callbacks in XPRESS might not work correctly with HEURSTRATEGY != 0",
)
end
MOI.set(model, CallbackFunction(), default_moi_callback(model))
model.has_generic_callback = false # because it is set as true in the above
elseif !model.has_generic_callback && is_mip(model)
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3 changes: 0 additions & 3 deletions test/test_MOI_wrapper.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -843,8 +843,6 @@ end
function callback_simple_model()
model = Xpress.Optimizer()
MOI.set(model, MOI.RawOptimizerAttribute("OUTPUTLOG"), 0)
MOI.set(model, MOI.RawOptimizerAttribute("HEURSTRATEGY"), 0)
MOI.set(model, MOI.RawOptimizerAttribute("HEUREMPHASIS"), 0)
MOI.set(model, MOI.RawOptimizerAttribute("CUTSTRATEGY"), 0)
MOI.set(model, MOI.RawOptimizerAttribute("PRESOLVE"), 0)
MOI.Utilities.loadfromstring!(
Expand All @@ -866,7 +864,6 @@ end
function callback_knapsack_model()
model = Xpress.Optimizer()
MOI.set(model, MOI.RawOptimizerAttribute("OUTPUTLOG"), 0)
MOI.set(model, MOI.RawOptimizerAttribute("HEUREMPHASIS"), 0)
MOI.set(model, MOI.RawOptimizerAttribute("CUTSTRATEGY"), 0)
MOI.set(model, MOI.RawOptimizerAttribute("PRESOLVE"), 0)
MOI.set(model, MOI.NumberOfThreads(), 2)
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