86 lines
2.4 KiB
Go
86 lines
2.4 KiB
Go
// Copyright 2023 PingCAP, Inc.
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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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package util
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import "sync"
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// MockGlobalStateEntry is a mock global state entry.
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var MockGlobalStateEntry = &MockGlobalState{
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currentOwner: make(map[ownerKey]string),
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}
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// MockGlobalState is a mock global state.
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type MockGlobalState struct {
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currentOwner map[ownerKey]string // store ID + owner_key (ddl/stats/bindinfo) => owner_id
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mu sync.Mutex
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}
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type ownerKey struct {
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storeID string
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ownerTp string
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}
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// OwnerKey returns a mock global state selector with corresponding owner key.
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func (m *MockGlobalState) OwnerKey(storeID, tp string) *MockGlobalStateSelector {
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return &MockGlobalStateSelector{m: m, storeID: storeID, ownerKey: tp}
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}
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// MockGlobalStateSelector is used to get info from global state.
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type MockGlobalStateSelector struct {
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m *MockGlobalState
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storeID string
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ownerKey string
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}
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// GetOwner returns the owner.
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func (t *MockGlobalStateSelector) GetOwner() string {
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t.m.mu.Lock()
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defer t.m.mu.Unlock()
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k := ownerKey{storeID: t.storeID, ownerTp: t.ownerKey}
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return t.m.currentOwner[k]
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}
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// SetOwner sets the owner if the owner is empty.
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func (t *MockGlobalStateSelector) SetOwner(owner string) bool {
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t.m.mu.Lock()
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defer t.m.mu.Unlock()
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k := ownerKey{storeID: t.storeID, ownerTp: t.ownerKey}
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if t.m.currentOwner[k] == "" {
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t.m.currentOwner[k] = owner
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return true
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}
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return false
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}
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// UnsetOwner unsets the owner.
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func (t *MockGlobalStateSelector) UnsetOwner(owner string) bool {
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t.m.mu.Lock()
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defer t.m.mu.Unlock()
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k := ownerKey{storeID: t.storeID, ownerTp: t.ownerKey}
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if t.m.currentOwner[k] == owner {
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t.m.currentOwner[k] = ""
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return true
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}
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return false
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}
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// IsOwner returns whether it is the owner.
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func (t *MockGlobalStateSelector) IsOwner(owner string) bool {
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t.m.mu.Lock()
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defer t.m.mu.Unlock()
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k := ownerKey{storeID: t.storeID, ownerTp: t.ownerKey}
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return t.m.currentOwner[k] == owner
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}
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