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392
full-text-search/meilisearch/connection.go
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392
full-text-search/meilisearch/connection.go
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// =============================================================================
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// Meilisearch 数据源连接管理
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// 负责数据源的连接、重连、健康检查和优雅关闭
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// =============================================================================
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package meilisearch
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import (
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"context"
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"fmt"
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"os"
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"os/signal"
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"sync"
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"syscall"
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"time"
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"github.com/gogf/gf/v2/frame/g"
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"github.com/gogf/gf/v2/os/glog"
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"github.com/gogf/gf/v2/util/gconv"
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ms "github.com/meilisearch/meilisearch-go"
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)
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// =============================================================================
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// 数据源配置结构
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// =============================================================================
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type DataSourceConfig struct {
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Name string `json:"name"`
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Host string `json:"host"`
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Port int `json:"port"`
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APIKey string `json:"apiKey"`
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Timeout time.Duration `json:"timeout"`
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}
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// =============================================================================
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// 单个数据源接口
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// =============================================================================
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type DataSource interface {
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Name() string
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Client() interface{}
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IsConnected() bool
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Connect(ctx context.Context) error
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Reconnect(ctx context.Context) error
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Close(ctx context.Context) error
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}
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// =============================================================================
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// 数据源实现
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// =============================================================================
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type BaseDataSource struct {
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config *DataSourceConfig
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client interface{}
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isConnected bool
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mu sync.RWMutex
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lastError error
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lastErrorTime time.Time
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}
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func NewBaseDataSource(config *DataSourceConfig) *BaseDataSource {
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return &BaseDataSource{
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config: config,
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isConnected: false,
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}
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}
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func (d *BaseDataSource) Name() string {
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return d.config.Name
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}
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func (d *BaseDataSource) Client() interface{} {
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d.mu.RLock()
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defer d.mu.RUnlock()
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return d.client
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}
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func (d *BaseDataSource) IsConnected() bool {
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d.mu.RLock()
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defer d.mu.RUnlock()
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return d.isConnected && d.client != nil
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}
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func (d *BaseDataSource) Connect(ctx context.Context) error {
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d.mu.Lock()
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defer d.mu.Unlock()
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// 构建客户端
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d.client = ms.New(d.config.Host, ms.WithAPIKey(d.config.APIKey))
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// 测试连接
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if err := d.healthCheck(ctx); err != nil {
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d.isConnected = false
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d.lastError = err
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d.lastErrorTime = time.Now()
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return fmt.Errorf("datasource [%s] connection failed: %w", d.config.Name, err)
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}
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d.isConnected = true
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d.lastError = nil
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glog.Infof(ctx, "✅ datasource [%s] connected successfully", d.config.Name)
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return nil
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}
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// healthCheck 健康检查
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func (d *BaseDataSource) healthCheck(ctx context.Context) error {
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if d.client == nil {
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return fmt.Errorf("client is nil")
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}
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// 获取版本信息来测试连接
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if c, ok := d.client.(interface{ GetVersion() (*ms.Version, error) }); ok {
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status, err := c.GetVersion()
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if err != nil {
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return err
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}
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glog.Debugf(ctx, "Meilisearch version: %s", status.PkgVersion)
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} else {
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// 如果没有GetVersion方法，尝试其他方法验证连接
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if _, ok := d.client.(interface {
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GetIndexes(interface{}) (interface{}, error)
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}); ok {
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return nil
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}
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}
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return nil
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}
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func (d *BaseDataSource) Reconnect(ctx context.Context) error {
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glog.Infof(ctx, "🔄 reconnecting datasource [%s]", d.config.Name)
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return d.Connect(ctx)
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}
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func (d *BaseDataSource) Close(ctx context.Context) error {
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d.mu.Lock()
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defer d.mu.Unlock()
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// Meilisearch 客户端不需要显式关闭，只重置状态
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d.client = nil
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d.isConnected = false
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glog.Infof(ctx, "datasource [%s] closed", d.config.Name)
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return nil
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}
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// =============================================================================
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// 多数据源管理器
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// =============================================================================
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type DataSourceManager struct {
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sources map[string]DataSource
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mu sync.RWMutex
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ctx context.Context
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cancel context.CancelFunc
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started bool
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maxRetries int
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}
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var (
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globalManager *DataSourceManager
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managerOnce sync.Once
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)
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// GetManager 获取全局管理器
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func GetManager() *DataSourceManager {
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managerOnce.Do(func() {
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ctx, cancel := context.WithCancel(context.Background())
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globalManager = &DataSourceManager{
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sources: make(map[string]DataSource),
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ctx: ctx,
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cancel: cancel,
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started: false,
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maxRetries: 3,
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}
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})
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return globalManager
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}
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// RegisterDataSource 注册数据源
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func (m *DataSourceManager) RegisterDataSource(config *DataSourceConfig) error {
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m.mu.Lock()
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defer m.mu.Unlock()
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if _, exists := m.sources[config.Name]; exists {
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return fmt.Errorf("datasource [%s] already exists", config.Name)
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}
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source := NewBaseDataSource(config)
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m.sources[config.Name] = source
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return nil
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}
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// GetDataSource 获取数据源
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func (m *DataSourceManager) GetDataSource(name string) (DataSource, error) {
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m.mu.RLock()
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defer m.mu.RUnlock()
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source, exists := m.sources[name]
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if !exists {
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return nil, fmt.Errorf("datasource [%s] not found", name)
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}
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return source, nil
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}
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// GetAllDataSourceNames 获取所有数据源名称
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func (m *DataSourceManager) GetAllDataSourceNames() []string {
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m.mu.RLock()
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defer m.mu.RUnlock()
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names := make([]string, 0, len(m.sources))
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for name := range m.sources {
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names = append(names, name)
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}
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return names
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}
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// init 初始化多数据源
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func init() {
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ctx := context.Background()
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// 从配置初始化多数据源
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if err := manager.InitializeFromConfig(ctx); err != nil {
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glog.Errorf(ctx, "❌ Failed to initialize Meilisearch datasources: %v", err)
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} else {
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glog.Infof(ctx, "✅ Meilisearch datasources initialized: %v", manager.GetAllDataSourceNames())
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}
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// 启动健康检查
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manager.StartHealthCheck()
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// 设置优雅关闭
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setupGracefulShutdown()
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}
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// InitializeFromConfig 从配置初始化数据源
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// 动态读取 config.yml 中 meilisearch 下的所有配置项
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func (m *DataSourceManager) InitializeFromConfig(ctx context.Context) error {
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var firstErr error
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// 获取 meilisearch 配置下的所有子键
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meilisearchConfig := g.Cfg().MustGet(ctx, "meilisearch")
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if meilisearchConfig.IsNil() {
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glog.Warningf(ctx, "no meilisearch configuration found in config.yml")
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return nil
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}
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// 将配置转换为 map
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configMap := meilisearchConfig.Map()
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if configMap == nil {
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glog.Warningf(ctx, "meilisearch configuration is not a map")
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return nil
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}
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// 遍历所有 meilisearch 子配置
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for name, subConfig := range configMap {
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// 跳过非对象类型的配置
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subMap, ok := subConfig.(map[string]interface{})
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if !ok {
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continue
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}
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// 检查是否有 host 配置
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host, hasHost := subMap["host"]
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if !hasHost || gconv.String(host) == "" {
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continue
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}
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// 构建数据源配置
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config := &DataSourceConfig{
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Name: name,
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Host: gconv.String(host),
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Port: int(gconv.Int(subMap["port"])),
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APIKey: gconv.String(subMap["apiKey"]),
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}
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// 设置默认值
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if config.Port == 0 {
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config.Port = 7700
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}
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if config.Host == "" {
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config.Host = "http://localhost"
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}
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// 可选：从配置读取超时时间
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if timeoutVal, hasTimeout := subMap["timeout"]; hasTimeout {
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config.Timeout = gconv.Duration(timeoutVal)
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} else {
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config.Timeout = 10 * time.Second
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}
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// 注册数据源
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if err := m.RegisterDataSource(config); err != nil {
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glog.Errorf(ctx, "failed to register datasource [%s]: %v", name, err)
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if firstErr == nil {
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firstErr = err
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}
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continue
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}
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// 连接数据源
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source, _ := m.GetDataSource(name)
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if err := source.Connect(ctx); err != nil {
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glog.Errorf(ctx, "failed to initialize datasource [%s]: %v", name, err)
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if firstErr == nil {
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firstErr = err
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}
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}
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}
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return firstErr
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}
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// StartHealthCheck 启动健康检查
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func (m *DataSourceManager) StartHealthCheck() {
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if m.started {
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return
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}
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m.started = true
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go m.healthCheckLoop()
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}
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// healthCheckLoop 健康检查循环
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func (m *DataSourceManager) healthCheckLoop() {
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ticker := time.NewTicker(30 * time.Second)
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defer ticker.Stop()
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for {
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select {
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case <-m.ctx.Done():
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return
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case <-ticker.C:
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m.checkAndReconnect()
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}
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}
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}
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// checkAndReconnect 检查并重新连接
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func (m *DataSourceManager) checkAndReconnect() {
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m.mu.RLock()
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defer m.mu.RUnlock()
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for name, source := range m.sources {
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if !source.IsConnected() {
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glog.Warningf(context.Background(), "datasource [%s] disconnected, attempting reconnect", name)
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reconnectCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
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defer cancel()
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if err := source.Reconnect(reconnectCtx); err != nil {
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glog.Errorf(reconnectCtx, "datasource [%s] reconnect failed: %v", name, err)
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} else {
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glog.Infof(reconnectCtx, "✅ datasource [%s] reconnected successfully", name)
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}
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}
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}
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}
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// CloseAll 关闭所有数据源
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func (m *DataSourceManager) CloseAll(ctx context.Context) error {
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m.cancel()
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m.mu.RLock()
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defer m.mu.RUnlock()
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var lastErr error
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for name, source := range m.sources {
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if err := source.Close(ctx); err != nil {
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glog.Errorf(ctx, "failed to close datasource [%s]: %v", name, err)
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lastErr = err
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}
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}
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return lastErr
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}
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// setupGracefulShutdown 设置优雅关闭
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func setupGracefulShutdown() {
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go func() {
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sigCh := make(chan os.Signal, 1)
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signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
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<-sigCh
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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glog.Info(ctx, "🔄 Shutting down Meilisearch connections...")
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if err := manager.CloseAll(ctx); err != nil {
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glog.Errorf(ctx, "❌ Failed to close Meilisearch connections: %v", err)
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} else {
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glog.Info(ctx, "✅ Meilisearch connections closed successfully")
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}
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}()
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}
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