Kyle Isom
c13c868e77
Vendor dependencies and expose mcproxyctl binary via nix build. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
67 lines
2.1 KiB
Go
67 lines
2.1 KiB
Go
/*
|
|
*
|
|
* Copyright 2025 gRPC authors.
|
|
*
|
|
* 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 weight contains utilities to manage endpoint weights. Weights are
|
|
// used by LB policies such as ringhash to distribute load across multiple
|
|
// endpoints.
|
|
package weight
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"google.golang.org/grpc/resolver"
|
|
)
|
|
|
|
// attributeKey is the type used as the key to store EndpointInfo in the
|
|
// Attributes field of resolver.Endpoint.
|
|
type attributeKey struct{}
|
|
|
|
// EndpointInfo will be stored in the Attributes field of Endpoints in order to
|
|
// use the ringhash balancer.
|
|
type EndpointInfo struct {
|
|
Weight uint32
|
|
}
|
|
|
|
// Equal allows the values to be compared by Attributes.Equal.
|
|
func (a EndpointInfo) Equal(o any) bool {
|
|
oa, ok := o.(EndpointInfo)
|
|
return ok && oa.Weight == a.Weight
|
|
}
|
|
|
|
// Set returns a copy of endpoint in which the Attributes field is updated with
|
|
// EndpointInfo.
|
|
func Set(endpoint resolver.Endpoint, epInfo EndpointInfo) resolver.Endpoint {
|
|
endpoint.Attributes = endpoint.Attributes.WithValue(attributeKey{}, epInfo)
|
|
return endpoint
|
|
}
|
|
|
|
// String returns a human-readable representation of EndpointInfo.
|
|
// This method is intended for logging, testing, and debugging purposes only.
|
|
// Do not rely on the output format, as it is not guaranteed to remain stable.
|
|
func (a EndpointInfo) String() string {
|
|
return fmt.Sprintf("Weight: %d", a.Weight)
|
|
}
|
|
|
|
// FromEndpoint returns the EndpointInfo stored in the Attributes field of an
|
|
// endpoint. It returns an empty EndpointInfo if attribute is not found.
|
|
func FromEndpoint(endpoint resolver.Endpoint) EndpointInfo {
|
|
v := endpoint.Attributes.Value(attributeKey{})
|
|
ei, _ := v.(EndpointInfo)
|
|
return ei
|
|
}
|