1 /* 2 Copyright 2014 The Kubernetes Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package versioned 18 19 import ( 20 "encoding/json" 21 22 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 23 "k8s.io/apimachinery/pkg/runtime" 24 "k8s.io/apimachinery/pkg/runtime/serializer/streaming" 25 "k8s.io/apimachinery/pkg/watch" 26 ) 27 28 // Encoder serializes watch.Events into io.Writer. The internal objects 29 // are encoded using embedded encoder, and the outer Event is serialized 30 // using encoder. 31 // TODO: this type is only used by tests 32 type Encoder struct { 33 encoder streaming.Encoder 34 embeddedEncoder runtime.Encoder 35 } 36 37 func NewEncoder(encoder streaming.Encoder, embeddedEncoder runtime.Encoder) *Encoder { 38 return &Encoder{ 39 encoder: encoder, 40 embeddedEncoder: embeddedEncoder, 41 } 42 } 43 44 // Encode writes an event to the writer. Returns an error 45 // if the writer is closed or an object can't be encoded. 46 func (e *Encoder) Encode(event *watch.Event) error { 47 data, err := runtime.Encode(e.embeddedEncoder, event.Object) 48 if err != nil { 49 return err 50 } 51 // FIXME: get rid of json.RawMessage. 52 return e.encoder.Encode(&metav1.WatchEvent{ 53 Type: string(event.Type), 54 Object: runtime.RawExtension{Raw: json.RawMessage(data)}, 55 }) 56 } 57