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factory.go
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factory.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 ecr helps generate clients to talk to the ECR API
package ecr
import (
"net/http"
"sync"
"time"
ecrapi "github.com/aws/amazon-ecs-agent/agent/ecr/model/ecr"
"github.com/aws/amazon-ecs-agent/agent/httpclient"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
)
// ECRSDK is an interface that specifies the subset of the AWS Go SDK's ECR
// client that the Agent uses. This interface is meant to allow injecting a
// mock for testing.
type ECRSDK interface {
GetAuthorizationToken(*ecrapi.GetAuthorizationTokenInput) (*ecrapi.GetAuthorizationTokenOutput, error)
}
type ECRFactory interface {
GetClient(region, endpointOverride string) ECRSDK
}
type ecrFactory struct {
httpClient *http.Client
clientsLock sync.Mutex
clients map[cacheKey]ECRSDK
}
type cacheKey struct {
region string
endpointOverride string
}
const (
roundtripTimeout = 5 * time.Second
)
// NewECRFactory returns an ECRFactory capable of producing ECRSDK clients
func NewECRFactory(acceptInsecureCert bool) ECRFactory {
return &ecrFactory{
httpClient: httpclient.New(roundtripTimeout, acceptInsecureCert),
clients: make(map[cacheKey]ECRSDK),
}
}
// GetClient returns the correct region- and endpoint-aware client
func (factory *ecrFactory) GetClient(region, endpointOverride string) ECRSDK {
key := cacheKey{region: region, endpointOverride: endpointOverride}
client, ok := factory.clients[key]
if ok {
return client
}
factory.clientsLock.Lock()
defer factory.clientsLock.Unlock()
client, ok = factory.clients[key]
if ok {
return client
}
client = factory.newClient(region, endpointOverride)
factory.clients[key] = client
return client
}
func (factory *ecrFactory) newClient(region, endpointOverride string) ECRSDK {
var ecrConfig aws.Config
ecrConfig.Region = ®ion
ecrConfig.HTTPClient = factory.httpClient
if endpointOverride != "" {
ecrConfig.Endpoint = &endpointOverride
}
return ecrapi.New(session.New(&ecrConfig))
}