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*: Make PD placement api as an interface and add some mock codes (#29696
) * *: Make PD placement api as an interface and add some mock codes * modify * add comments Co-authored-by: Arenatlx <314806019@qq.com>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,122 @@ | ||
| // Copyright 2021 PingCAP, Inc. | ||
| // | ||
| // 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. | ||
|
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| package infosync | ||
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| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "path" | ||
| "sync" | ||
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| "github.com/pingcap/tidb/ddl/placement" | ||
| "github.com/pingcap/tidb/util/pdapi" | ||
| ) | ||
|
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| // PlacementManager manages placement settings | ||
| type PlacementManager interface { | ||
| // GetRuleBundle is used to get one specific rule bundle from PD. | ||
| GetRuleBundle(ctx context.Context, name string) (*placement.Bundle, error) | ||
| // GetAllRuleBundles is used to get all rule bundles from PD. It is used to load full rules from PD while fullload infoschema. | ||
| GetAllRuleBundles(ctx context.Context) ([]*placement.Bundle, error) | ||
| // PutRuleBundles is used to post specific rule bundles to PD. | ||
| PutRuleBundles(ctx context.Context, bundles []*placement.Bundle) error | ||
| } | ||
|
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| // PDPlacementManager manages placement with pd | ||
| type PDPlacementManager struct { | ||
| addrs []string | ||
| } | ||
|
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| // GetRuleBundle is used to get one specific rule bundle from PD. | ||
| func (m *PDPlacementManager) GetRuleBundle(ctx context.Context, name string) (*placement.Bundle, error) { | ||
| bundle := &placement.Bundle{ID: name} | ||
| res, err := doRequest(ctx, m.addrs, path.Join(pdapi.Config, "placement-rule", name), "GET", nil) | ||
| if err == nil && res != nil { | ||
| err = json.Unmarshal(res, bundle) | ||
| } | ||
| return bundle, err | ||
| } | ||
|
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| // GetAllRuleBundles is used to get all rule bundles from PD. It is used to load full rules from PD while fullload infoschema. | ||
| func (m *PDPlacementManager) GetAllRuleBundles(ctx context.Context) ([]*placement.Bundle, error) { | ||
| var bundles []*placement.Bundle | ||
| res, err := doRequest(ctx, m.addrs, path.Join(pdapi.Config, "placement-rule"), "GET", nil) | ||
| if err == nil && res != nil { | ||
| err = json.Unmarshal(res, &bundles) | ||
| } | ||
| return bundles, err | ||
| } | ||
|
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| // PutRuleBundles is used to post specific rule bundles to PD. | ||
| func (m *PDPlacementManager) PutRuleBundles(ctx context.Context, bundles []*placement.Bundle) error { | ||
| if len(bundles) == 0 { | ||
| return nil | ||
| } | ||
|
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| b, err := json.Marshal(bundles) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| _, err = doRequest(ctx, m.addrs, path.Join(pdapi.Config, "placement-rule")+"?partial=true", "POST", bytes.NewReader(b)) | ||
| return err | ||
| } | ||
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| type mockPlacementManager struct { | ||
| sync.Mutex | ||
| bundles map[string]*placement.Bundle | ||
| } | ||
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| func (m *mockPlacementManager) GetRuleBundle(_ context.Context, name string) (*placement.Bundle, error) { | ||
| m.Lock() | ||
| defer m.Unlock() | ||
|
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| if bundle, ok := m.bundles[name]; ok { | ||
| return bundle, nil | ||
| } | ||
|
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| return &placement.Bundle{ID: name}, nil | ||
| } | ||
|
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| func (m *mockPlacementManager) GetAllRuleBundles(_ context.Context) ([]*placement.Bundle, error) { | ||
| m.Lock() | ||
| defer m.Unlock() | ||
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| bundles := make([]*placement.Bundle, 0, len(m.bundles)) | ||
| for _, bundle := range m.bundles { | ||
| bundles = append(bundles, bundle) | ||
| } | ||
| return bundles, nil | ||
| } | ||
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| func (m *mockPlacementManager) PutRuleBundles(_ context.Context, bundles []*placement.Bundle) error { | ||
| m.Lock() | ||
| defer m.Unlock() | ||
|
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| if m.bundles == nil { | ||
| m.bundles = make(map[string]*placement.Bundle) | ||
| } | ||
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| for _, bundle := range bundles { | ||
| if bundle.IsEmpty() { | ||
| delete(m.bundles, bundle.ID) | ||
| } else { | ||
| m.bundles[bundle.ID] = bundle | ||
| } | ||
| } | ||
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| return nil | ||
| } |