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registry.go
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registry.go
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/**
* Copyright 2020 IBM Corp.
*
* Licensed 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 registry ...
package registry
import (
//"github.com/prometheus/client_golang/prometheus"
util "github.com/IBM/ibmcloud-volume-interface/lib/utils"
"github.com/IBM/ibmcloud-volume-interface/provider/local"
)
// Providers is a registry interface for IaaS providers
//
//go:generate counterfeiter -o fakes/provider_registry.go --fake-name Providers . Providers
type Providers interface {
Get(providerID string) (local.Provider, error)
Register(providerID string, prov local.Provider)
}
var _ Providers = &ProviderRegistry{}
// ProviderRegistry is the core implementation of the Providers registry
type ProviderRegistry struct {
providers map[string]local.Provider
}
// Get returns the identified Provider
func (pr *ProviderRegistry) Get(providerID string) (prov local.Provider, err error) {
prov = pr.providers[providerID]
if prov == nil {
err = util.NewError("ErrorUnclassified", "Provider unknown: "+providerID)
}
return
}
// Register registers a given provider under the supplied key
func (pr *ProviderRegistry) Register(providerID string, p local.Provider) {
if pr.providers == nil {
pr.providers = map[string]local.Provider{}
}
pr.providers[providerID] = p
}