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ns_isolation_data.go
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ns_isolation_data.go
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 utils
import (
"github.com/pkg/errors"
)
type NamespaceIsolationData struct {
Namespaces []string `json:"namespaces"`
Primary []string `json:"primary"`
Secondary []string `json:"secondary"`
AutoFailoverPolicy AutoFailoverPolicyData `json:"auto_failover_policy"`
}
type AutoFailoverPolicyData struct {
PolicyType AutoFailoverPolicyType `json:"policy_type"`
Parameters map[string]string `json:"parameters"`
}
type AutoFailoverPolicyType string
const (
MinAvailable AutoFailoverPolicyType = "min_available"
)
func fromString(autoFailoverPolicyTypeName string) AutoFailoverPolicyType {
switch autoFailoverPolicyTypeName {
case "min_available":
return MinAvailable
default:
return ""
}
}
func CreateNamespaceIsolationData(namespaces, primary, secondry []string, autoFailoverPolicyTypeName string,
autoFailoverPolicyParams map[string]string) (*NamespaceIsolationData, error) {
nsIsolationData := new(NamespaceIsolationData)
if len(namespaces) == 0 {
return nil, errors.New("unable to parse namespaces parameter list")
}
if len(primary) == 0 {
return nil, errors.New("unable to parse primary parameter list")
}
if len(secondry) == 0 {
return nil, errors.New("unable to parse secondry parameter list")
}
nsIsolationData.Namespaces = namespaces
nsIsolationData.Primary = primary
nsIsolationData.Secondary = secondry
nsIsolationData.AutoFailoverPolicy.PolicyType = fromString(autoFailoverPolicyTypeName)
nsIsolationData.AutoFailoverPolicy.Parameters = autoFailoverPolicyParams
// validation if necessary
if nsIsolationData.AutoFailoverPolicy.PolicyType == MinAvailable {
err := true
expectParamKeys := []string{"min_limit", "usage_threshold"}
if len(autoFailoverPolicyParams) == len(expectParamKeys) {
for _, paramKey := range expectParamKeys {
if _, ok := autoFailoverPolicyParams[paramKey]; !ok {
break
}
}
err = false
}
if err {
return nil, errors.Errorf("Unknown auto failover policy params specified: %v", autoFailoverPolicyParams)
}
} else {
// either we don't handle the new type or user has specified a bad type
return nil, errors.Errorf("Unknown auto failover policy type specified : %v", autoFailoverPolicyTypeName)
}
return nsIsolationData, nil
}