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template_handler.gen.go
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template_handler.gen.go
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// Copyright 2017 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.
// THIS FILE IS AUTOMATICALLY GENERATED.
package listentry
import (
"context"
"istio.io/istio/mixer/pkg/adapter"
)
// The `listentry` template is designed to let you perform list check operations
// with the [list](https://istio.io/docs/reference/config/policy-and-telemetry/adapters/list/) adapter.
//
// Example config:
//
// ```
// apiVersion: "config.istio.io/v1alpha2"
// kind: listentry
// metadata:
// name: appversion
// namespace: istio-system
// spec:
// value: source.labels["version"]
// ```
// Fully qualified name of the template
const TemplateName = "listentry"
// Instance is constructed by Mixer for the 'listentry' template.
//
// The `listentry` template is used to verify the presence/absence of a string
// within a list.
//
// When writing the configuration, the value for the fields associated with this template can either be a
// literal or an [expression](https://istio.io/docs/reference//config/policy-and-telemetry/expression-language/). Please note that if the datatype of a field is not istio.policy.v1beta1.Value,
// then the expression's [inferred type](https://istio.io/docs/reference//config/policy-and-telemetry/expression-language/#type-checking) must match the datatype of the field.
type Instance struct {
// Name of the instance as specified in configuration.
Name string
// Specifies the entry to verify in the list. This value can either be a string or an IP address.
Value interface{}
}
// HandlerBuilder must be implemented by adapters if they want to
// process data associated with the 'listentry' template.
//
// Mixer uses this interface to call into the adapter at configuration time to configure
// it with adapter-specific configuration as well as all template-specific type information.
type HandlerBuilder interface {
adapter.HandlerBuilder
// SetListEntryTypes is invoked by Mixer to pass the template-specific Type information for instances that an adapter
// may receive at runtime. The type information describes the shape of the instance.
SetListEntryTypes(map[string]*Type /*Instance name -> Type*/)
}
// Handler must be implemented by adapter code if it wants to
// process data associated with the 'listentry' template.
//
// Mixer uses this interface to call into the adapter at request time in order to dispatch
// created instances to the adapter. Adapters take the incoming instances and do what they
// need to achieve their primary function.
//
// The name of each instance can be used as a key into the Type map supplied to the adapter
// at configuration time via the method 'SetListEntryTypes'.
// These Type associated with an instance describes the shape of the instance
type Handler interface {
adapter.Handler
// HandleListEntry is called by Mixer at request time to deliver instances to
// to an adapter.
HandleListEntry(context.Context, *Instance) (adapter.CheckResult, error)
}