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filter.go
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filter.go
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// MIT License
//
// Copyright (c) 2020 Lack
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package selector
import (
regpb "github.com/lack-io/vine/proto/apis/registry"
)
// FilterEndpoint is an endpoint based Select Filter which will
// only return services with the endpoint specified.
func FilterEndpoint(name string) Filter {
return func(old []*regpb.Service) []*regpb.Service {
var services []*regpb.Service
for _, service := range old {
for _, ep := range service.Endpoints {
if ep.Name == name {
services = append(services, service)
break
}
}
}
return services
}
}
// FilterLabel is a label based Select Filter which will
// only return services with the label specified.
func FilterLabel(key, val string) Filter {
return func(old []*regpb.Service) []*regpb.Service {
var services []*regpb.Service
for _, service := range old {
serv := new(regpb.Service)
var nodes []*regpb.Node
for _, node := range service.Nodes {
if node.Metadata == nil {
continue
}
if node.Metadata[key] == val {
nodes = append(nodes, node)
}
}
// only add service if there's some nodes
if len(nodes) > 0 {
// copy
*serv = *service
serv.Nodes = nodes
services = append(services, serv)
}
}
return services
}
}
// FilterVersion is a version based Select Filter which will
// only return services with the version specified.
func FilterVersion(version string) Filter {
return func(old []*regpb.Service) []*regpb.Service {
var services []*regpb.Service
for _, service := range old {
if service.Version == version {
services = append(services, service)
}
}
return services
}
}