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ranker.go
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ranker.go
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// Copyright (c) 2019 Uber Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package binpacking
import (
"context"
"github.com/uber/peloton/pkg/hostmgr/summary"
)
// Ranker is the interface for ranking strategy for ranking the host
// it returns the list of ordered list of hosts summary. Caller of the
// interface would get the list of ordered host summary and then match the
// host from 0->n to match the constraints with offer.
type Ranker interface {
// Returns the name of the ranker implementation
Name() string
// returns the list of ranked ordered list
GetRankedHostList(
ctx context.Context,
offerIndex map[string]summary.HostSummary,
) []interface{}
// Refreshes the ranker based on new host summary index
// we need to call this asynchronously to mitigate the
// performance penalty of bin packing.
RefreshRanking(
ctx context.Context,
offerIndex map[string]summary.HostSummary,
)
}