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snapshot.go
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snapshot.go
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// Copyright 2018 Istio Authors
//
// 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 config
import (
"github.com/gogo/protobuf/proto"
"github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
"github.com/gogo/protobuf/types"
adptTmpl "istio.io/api/mixer/adapter/model/v1beta1"
"istio.io/api/policy/v1beta1"
"istio.io/istio/mixer/pkg/adapter"
"istio.io/istio/mixer/pkg/lang/ast"
"istio.io/istio/mixer/pkg/protobuf/yaml/dynamic"
"istio.io/istio/mixer/pkg/template"
)
type (
// Snapshot view of configuration.
Snapshot struct {
ID int64
// Static information
Templates map[string]*template.Info
Adapters map[string]*adapter.Info
// Config store based information
Attributes ast.AttributeDescriptorFinder
HandlersStatic map[string]*HandlerStatic
InstancesStatic map[string]*InstanceStatic
// TemplateMetadatas contains template descriptors loaded from the store
TemplateMetadatas map[string]*Template
// AdapterMetadatas contains adapter metadata loaded from the store
AdapterMetadatas map[string]*Adapter
HandlersDynamic map[string]*HandlerDynamic
InstancesDynamic map[string]*InstanceDynamic
Rules []*Rule
// Perf Counters relevant to configuration.
Counters Counters
}
// HandlerDynamic configuration for dynamically loaded, grpc adapters. Fully resolved.
HandlerDynamic struct {
Name string
Adapter *Adapter
// AdapterConfig used to construct the Handler. This is passed in verbatim to the remote adapter.
AdapterConfig *types.Any
// Connection information for the handler.
Connection *v1beta1.Connection
}
// HandlerStatic configuration for compiled in adapters. Fully resolved.
HandlerStatic struct {
// Name of the Handler. Fully qualified.
Name string
// Associated adapter. Always resolved.
Adapter *adapter.Info
// parameters used to construct the Handler.
Params proto.Message
}
// InstanceDynamic configuration for dynamically loaded templates. Fully resolved.
InstanceDynamic struct {
Name string
Template *Template
// Encoder to create request instance bytes from attributes
Encoder dynamic.Encoder
// Params of the instance; used to to create the config SHA.
Params map[string]interface{}
}
// InstanceStatic configuration for compiled templates. Fully resolved.
InstanceStatic struct {
// Name of the instance. Fully qualified.
Name string
// Associated template. Always resolved.
Template *template.Info
// parameters used to construct the instance.
Params proto.Message
// inferred type for the instance.
InferredType proto.Message
}
// Rule configuration. Fully resolved.
Rule struct {
// Name of the rule
Name string
// Namespace of the rule
Namespace string
// Match condition
Match string
ActionsDynamic []*ActionDynamic
ActionsStatic []*ActionStatic
}
// ActionDynamic configuration. Fully resolved.
ActionDynamic struct {
// Handler that this action is resolved to.
Handler *HandlerDynamic
// Instances that should be generated as part of invoking action.
Instances []*InstanceDynamic
}
// ActionStatic configuration. Fully resolved.
ActionStatic struct {
// Handler that this action is resolved to.
Handler *HandlerStatic
// Instances that should be generated as part of invoking action.
Instances []*InstanceStatic
}
// Template contains info about a template
Template struct {
// Name of the template.
//
// Note this is the template's resource name and not the template's internal name that adapter developer
// uses to implement adapter service.
Name string
// Variety of this template
Variety adptTmpl.TemplateVariety
// InternalPackageDerivedName is the name of the template from adapter developer point of view.
// The service and functions implemented by the adapter is based on this name
// NOTE: This name derived from template proto package and not the resource name.
InternalPackageDerivedName string
// Template's file descriptor set.
FileDescSet *descriptor.FileDescriptorSet
// package name of the `Template` message
PackageName string
}
// Adapter contains info about an adapter
Adapter struct {
Name string
// Adapter's file descriptor set.
ConfigDescSet *descriptor.FileDescriptorSet
// package name of the `Params` message
PackageName string
SupportedTemplates []*Template
SessionBased bool
Description string
}
)
// Empty returns a new, empty configuration snapshot.
func Empty() *Snapshot {
return &Snapshot{
ID: -1,
Rules: []*Rule{},
Counters: newCounters(-1),
}
}
// GetName gets name
func (h HandlerStatic) GetName() string {
return h.Name
}
// AdapterName gets adapter name
func (h HandlerStatic) AdapterName() string {
return h.Adapter.Name
}
// AdapterParams gets AdapterParams
func (h HandlerStatic) AdapterParams() interface{} {
return h.Params
}
// GetName gets name
func (i InstanceStatic) GetName() string {
return i.Name
}
// TemplateName gets TemplateName
func (i InstanceStatic) TemplateName() string {
return i.Template.Name
}
// TemplateParams gets TemplateParams
func (i InstanceStatic) TemplateParams() interface{} {
return i.Params
}
// GetName gets name
func (h HandlerDynamic) GetName() string {
return h.Name
}
// AdapterName gets adapter name
func (h HandlerDynamic) AdapterName() string {
return h.Adapter.Name
}
// AdapterParams gets AdapterParams
func (h HandlerDynamic) AdapterParams() interface{} {
return h.AdapterConfig
}
// GetName gets name
func (i InstanceDynamic) GetName() string {
return i.Name
}
// TemplateName gets TemplateName
func (i InstanceDynamic) TemplateName() string {
return i.Template.Name
}
// TemplateParams gets TemplateParams
func (i InstanceDynamic) TemplateParams() interface{} {
return i.Params
}