135 lines
2.6 KiB
Go
135 lines
2.6 KiB
Go
package searcher
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import (
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"errors"
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"fmt"
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"log"
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"os"
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"runtime"
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"unsafe"
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"myschools.me/suguo/gofound/searcher/words"
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)
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type Container struct {
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Dir string //文件夹
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engines map[string]*Engine //引擎
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Debug bool //调试
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Tokenizer *words.Tokenizer //分词器
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Shard int //分片
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Timeout int64 //超时关闭数据库
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BufferNum int //分片缓冲数
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}
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func (c *Container) Init() error {
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c.engines = make(map[string]*Engine)
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//读取当前路径下的所有目录，就是数据库名称
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dirs, err := os.ReadDir(c.Dir)
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if err != nil {
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if os.IsNotExist(err) {
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//创建
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err := os.MkdirAll(c.Dir, os.ModePerm)
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if err != nil {
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return err
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}
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} else {
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return err
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}
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}
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//初始化数据库
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for _, dir := range dirs {
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if dir.IsDir() {
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c.engines[dir.Name()] = c.GetDataBase(dir.Name())
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log.Println("db:", dir.Name())
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}
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}
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return nil
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}
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// NewEngine 创建一个引擎
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func (c *Container) NewEngine(name string) *Engine {
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var engine = &Engine{
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IndexPath: fmt.Sprintf("%s%c%s", c.Dir, os.PathSeparator, name),
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DatabaseName: name,
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Tokenizer: c.Tokenizer,
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Shard: c.Shard,
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Timeout: c.Timeout,
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BufferNum: c.BufferNum,
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}
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option := engine.GetOptions()
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engine.InitOption(option)
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engine.IsDebug = c.Debug
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return engine
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}
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// GetDataBase 获取或创建引擎
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func (c *Container) GetDataBase(name string) *Engine {
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//默认数据库名为default
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if name == "" {
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name = "default"
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}
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//log.Println("Get DataBase:", name)
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engine, ok := c.engines[name]
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if !ok {
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//创建引擎
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engine = c.NewEngine(name)
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c.engines[name] = engine
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//释放引擎
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}
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return engine
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}
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// GetDataBases 获取数据库列表
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func (c *Container) GetDataBases() map[string]*Engine {
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for _, engine := range c.engines {
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size := unsafe.Sizeof(&engine)
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fmt.Printf("%s:%d\n", engine.DatabaseName, size)
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}
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return c.engines
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}
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func (c *Container) GetDataBaseNumber() int {
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return len(c.engines)
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}
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func (c *Container) GetIndexCount() int64 {
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var count int64
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for _, engine := range c.engines {
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count += engine.GetIndexCount()
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}
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return count
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}
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func (c *Container) GetDocumentCount() int64 {
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var count int64
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for _, engine := range c.engines {
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count += engine.GetDocumentCount()
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}
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return count
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}
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// DropDataBase 删除数据库
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func (c *Container) DropDataBase(name string) error {
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if _, ok := c.engines[name]; !ok {
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return errors.New("数据库不存在")
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}
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err := c.engines[name].Drop()
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if err != nil {
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return err
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}
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delete(c.engines, name)
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//释放资源
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runtime.GC()
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return nil
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}
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