mirror of https://github.com/tikv/pd.git
67 lines
1.8 KiB
Go
67 lines
1.8 KiB
Go
// Copyright 2019 TiKV Project 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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package schedule
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import (
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"path/filepath"
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"plugin"
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"go.uber.org/zap"
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"github.com/pingcap/log"
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"github.com/tikv/pd/pkg/errs"
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"github.com/tikv/pd/pkg/utils/syncutil"
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)
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// PluginInterface is used to manage all plugin.
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type PluginInterface struct {
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pluginMap map[string]*plugin.Plugin
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pluginMapLock syncutil.RWMutex
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}
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// NewPluginInterface create a plugin interface
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func NewPluginInterface() *PluginInterface {
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return &PluginInterface{
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pluginMap: make(map[string]*plugin.Plugin),
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pluginMapLock: syncutil.RWMutex{},
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}
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}
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// GetFunction gets func by funcName from plugin(.so)
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func (p *PluginInterface) GetFunction(path string, funcName string) (plugin.Symbol, error) {
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p.pluginMapLock.Lock()
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defer p.pluginMapLock.Unlock()
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if _, ok := p.pluginMap[path]; !ok {
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// open plugin
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filePath, err := filepath.Abs(path)
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if err != nil {
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return nil, errs.ErrFilePathAbs.Wrap(err)
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}
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log.Info("open plugin file", zap.String("file-path", filePath))
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plugin, err := plugin.Open(filePath)
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if err != nil {
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return nil, errs.ErrLoadPlugin.Wrap(err)
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}
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p.pluginMap[path] = plugin
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}
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// get func from plugin
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f, err := p.pluginMap[path].Lookup(funcName)
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if err != nil {
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return nil, errs.ErrLookupPluginFunc.Wrap(err)
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}
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return f, nil
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}
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