forked from aws/amazon-ecs-agent
/
client_types.go
71 lines (61 loc) · 2.43 KB
/
client_types.go
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// Copyright 2014-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"). You may
// not use this file except in compliance with the License. A copy of the
// License is located at
//
// http://aws.amazon.com/apache2.0/
//
// or in the "license" file accompanying this file. This file 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 tcsclient wraps the generated aws-sdk-go client to provide marshalling
// and unmarshalling of data over a websocket connection in the format expected
// by TCS. It allows for bidirectional communication and acts as both a
// client-and-server in terms of requests, but only as a client in terms of
// connecting.
package tcsclient
import (
"reflect"
"github.com/aws/amazon-ecs-agent/agent/tcs/model/ecstcs"
)
var tcsTypeMappings map[string]reflect.Type
func init() {
// This list is currently *manually updated* and assumes that the generated
// struct type-names within the package *exactly match* the type sent by ACS/TCS
// (true so far; careful with inflections)
// TODO, this list should be autogenerated
// I couldn't figure out how to get a list of all structs in a package via
// reflection, but that would solve this. The alternative is to either parse
// the .json model or the generated struct names.
recognizedTypes := []interface{}{
ecstcs.StopTelemetrySessionMessage{},
ecstcs.AckPublishMetric{},
ecstcs.HeartbeatMessage{},
ecstcs.PublishMetricsRequest{},
ecstcs.StartTelemetrySessionRequest{},
ecstcs.ServerException{},
ecstcs.BadRequestException{},
ecstcs.ResourceValidationException{},
ecstcs.InvalidParameterException{},
}
tcsTypeMappings = make(map[string]reflect.Type)
// This produces a map of:
// "MyMessage": TypeOf(ecstcs.MyMessage)
for _, recognizedType := range recognizedTypes {
tcsTypeMappings[reflect.TypeOf(recognizedType).Name()] = reflect.TypeOf(recognizedType)
}
}
// TcsDecoder implments wsclient.TypeDecoder.
type TcsDecoder struct{}
func (dc *TcsDecoder) NewOfType(tcsType string) (interface{}, bool) {
rtype, ok := tcsTypeMappings[tcsType]
if !ok {
return nil, false
}
return reflect.New(rtype).Interface(), true
}
func (dc *TcsDecoder) GetRecognizedTypes() map[string]reflect.Type {
return tcsTypeMappings
}