istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pkg/test/framework/components/echo/factory.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package echo
    16  
    17  import (
    18  	"fmt"
    19  
    20  	"istio.io/istio/pkg/test/framework/components/cluster"
    21  	"istio.io/istio/pkg/test/framework/resource"
    22  )
    23  
    24  // FactoryFunc can be used by a builder to produce instances from configs
    25  type FactoryFunc func(ctx resource.Context, config []Config) (Instances, error)
    26  
    27  var factoryRegistry = map[cluster.Kind]FactoryFunc{}
    28  
    29  // RegisterFactory globally registers a base factory of a given Kind.
    30  // The given factory should be immutable, as it will be used globally.
    31  func RegisterFactory(kind cluster.Kind, factory FactoryFunc) {
    32  	factoryRegistry[kind] = factory
    33  }
    34  
    35  func GetBuilder(kind cluster.Kind) (FactoryFunc, error) {
    36  	f, ok := factoryRegistry[kind]
    37  	if !ok {
    38  		return nil, fmt.Errorf("unsupported cluster kind: %q", kind)
    39  	}
    40  	return f, nil
    41  }