tidb spi 源码
tidb spi 代码
文件路径：/plugin/spi.go
// Copyright 2019 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.
package plugin
import (
"context"
"reflect"
"unsafe"
)
const (
// LibrarySuffix defines TiDB plugin's file suffix.
LibrarySuffix = ".so"
// ManifestSymbol defines TiDB plugin's entrance symbol.
// Plugin take manifest info from this symbol.
ManifestSymbol = "PluginManifest"
)
// Manifest describes plugin info and how it can do by plugin itself.
type Manifest struct {
Name string
Description string
RequireVersion map[string]uint16
License string
BuildTime string
// Validate defines the validate logic for plugin.
// returns error will stop load plugin process and TiDB startup.
Validate func(ctx context.Context, manifest *Manifest) error
// OnInit defines the plugin init logic.
// it will be called after domain init.
// return error will stop load plugin process and TiDB startup.
OnInit func(ctx context.Context, manifest *Manifest) error
// OnShutDown defines the plugin cleanup logic.
// return error will write log and continue shutdown.
OnShutdown func(ctx context.Context, manifest *Manifest) error
// OnFlush defines flush logic after executed `flush tidb plugins`.
// it will be called after OnInit.
// return error will write log and continue watch following flush.
OnFlush func(ctx context.Context, manifest *Manifest) error
flushWatcher *flushWatcher
Version uint16
Kind Kind
}
// ExportManifest exports a manifest to TiDB as a known format.
// it just casts sub-manifest to manifest.
func ExportManifest(m interface{}) *Manifest {
v := reflect.ValueOf(m)
return (*Manifest)(unsafe.Pointer(v.Pointer()))
}
// AuthenticationManifest presents a sub-manifest that every audit plugin must provide.
type AuthenticationManifest struct {
Manifest
AuthenticateUser func()
GenerateAuthenticationString func()
ValidateAuthenticationString func()
SetSalt func()
}
// SchemaManifest presents a sub-manifest that every schema plugins must provide.
type SchemaManifest struct {
Manifest
}
// DaemonManifest presents a sub-manifest that every DaemonManifest plugins must provide.
type DaemonManifest struct {
Manifest
}
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