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75 lines
2.2 KiB
Go
75 lines
2.2 KiB
Go
/*
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*
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* Copyright 2022 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package channelz
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import "fmt"
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// Identifier is an opaque identifier which uniquely identifies an entity in the
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// channelz database.
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type Identifier struct {
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typ RefChannelType
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id int64
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str string
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pid *Identifier
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}
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// Type returns the entity type corresponding to id.
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func (id *Identifier) Type() RefChannelType {
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return id.typ
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}
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// Int returns the integer identifier corresponding to id.
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func (id *Identifier) Int() int64 {
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return id.id
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}
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// String returns a string representation of the entity corresponding to id.
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//
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// This includes some information about the parent as well. Examples:
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// Top-level channel: [Channel #channel-number]
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// Nested channel: [Channel #parent-channel-number Channel #channel-number]
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// Sub channel: [Channel #parent-channel SubChannel #subchannel-number]
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func (id *Identifier) String() string {
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return id.str
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}
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// Equal returns true if other is the same as id.
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func (id *Identifier) Equal(other *Identifier) bool {
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if (id != nil) != (other != nil) {
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return false
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}
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if id == nil && other == nil {
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return true
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}
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return id.typ == other.typ && id.id == other.id && id.pid == other.pid
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}
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// NewIdentifierForTesting returns a new opaque identifier to be used only for
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// testing purposes.
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func NewIdentifierForTesting(typ RefChannelType, id int64, pid *Identifier) *Identifier {
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return newIdentifer(typ, id, pid)
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}
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func newIdentifer(typ RefChannelType, id int64, pid *Identifier) *Identifier {
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str := fmt.Sprintf("%s #%d", typ, id)
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if pid != nil {
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str = fmt.Sprintf("%s %s", pid, str)
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}
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return &Identifier{typ: typ, id: id, str: str, pid: pid}
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}
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