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selector.go
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selector.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 selector
import "github.com/apache/incubator-eventmesh/eventmesh-server-go/pkg/naming/registry"
// Selector is the interface that defines the selector.
type Selector interface {
// Select gets a backend instance by service name.
Select(serviceName string) (*registry.Instance, error)
}
var (
selectors = make(map[string]Selector)
)
// Register registers a named Selector, such as l5, cmlb and tseer.
func Register(name string, s Selector) {
selectors[name] = s
}
// Get gets a named Selector.
func Get(name string) Selector {
s := selectors[name]
return s
}
func unregisterForTesting(name string) {
delete(selectors, name)
}