103 lines
3.4 KiB
Go
103 lines
3.4 KiB
Go
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package service
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import (
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"context"
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"fmt"
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"github.com/cloudwego/eino/compose"
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)
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const (
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nodePromptBuilder = "prompt_builder"
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nodeAssetGenerator = "asset_generator"
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nodeQualitySupervisor = "quality_supervisor"
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nodeFormatAdapter = "format_adapter"
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)
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// NewGenerateGraph 创建四阶段生成管线 Graph。
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//
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// START → PromptBuilder → AssetGenerator → QualitySupervisor
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// ├── pass → FormatAdapter → END
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// └── fail, retry<3 → PromptBuilder
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// └── fail, retry>=3 → FormatAdapter (降级)
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func NewGenerateGraph() (*compose.Graph[PipelineInput, PipelineOutput], error) {
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g := compose.NewGraph[PipelineInput, PipelineOutput](
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compose.WithGenLocalState(func(ctx context.Context) *PipelineState {
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return &PipelineState{}
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}),
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)
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// 添加节点
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if err := g.AddLambdaNode(nodePromptBuilder, promptBuilderNode,
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compose.WithStatePreHandler(promptBuilderPreHandler),
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compose.WithStatePostHandler(promptBuilderPostHandler),
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); err != nil {
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return nil, fmt.Errorf("add %s node: %w", nodePromptBuilder, err)
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}
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if err := g.AddLambdaNode(nodeAssetGenerator, assetGeneratorNode,
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compose.WithStatePostHandler(assetGeneratorPostHandler),
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); err != nil {
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return nil, fmt.Errorf("add %s node: %w", nodeAssetGenerator, err)
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}
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if err := g.AddLambdaNode(nodeQualitySupervisor, qualitySupervisorNode); err != nil {
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return nil, fmt.Errorf("add %s node: %w", nodeQualitySupervisor, err)
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}
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if err := g.AddLambdaNode(nodeFormatAdapter, formatAdapterNode); err != nil {
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return nil, fmt.Errorf("add %s node: %w", nodeFormatAdapter, err)
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}
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// 连线：正常路径
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if err := g.AddEdge(compose.START, nodePromptBuilder); err != nil {
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return nil, fmt.Errorf("add edge START->%s: %w", nodePromptBuilder, err)
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}
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if err := g.AddEdge(nodePromptBuilder, nodeAssetGenerator); err != nil {
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return nil, fmt.Errorf("add edge %s->%s: %w", nodePromptBuilder, nodeAssetGenerator, err)
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}
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if err := g.AddEdge(nodeAssetGenerator, nodeQualitySupervisor); err != nil {
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return nil, fmt.Errorf("add edge %s->%s: %w", nodeAssetGenerator, nodeQualitySupervisor, err)
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}
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if err := g.AddEdge(nodeFormatAdapter, compose.END); err != nil {
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return nil, fmt.Errorf("add edge %s->END: %w", nodeFormatAdapter, err)
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}
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// 连线：质检分支（从 state.NextNode 读取路由目标）
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if err := g.AddBranch(nodeQualitySupervisor, compose.NewGraphBranch(
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func(ctx context.Context, _ PipelineInput) (string, error) {
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var next string
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_ = compose.ProcessState[*PipelineState](ctx, func(_ context.Context, state *PipelineState) error {
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next = state.NextNode
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return nil
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})
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return next, nil
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},
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map[string]bool{nodePromptBuilder: true, nodeFormatAdapter: true},
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)); err != nil {
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return nil, fmt.Errorf("add branch at %s: %w", nodeQualitySupervisor, err)
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}
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return g, nil
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}
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// RunPipeline 编译并执行生成管线
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func RunPipeline(ctx context.Context, in PipelineInput) (*PipelineOutput, error) {
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g, err := NewGenerateGraph()
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if err != nil {
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return nil, fmt.Errorf("create graph: %w", err)
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}
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r, err := g.Compile(ctx, compose.WithMaxRunSteps(20))
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if err != nil {
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return nil, fmt.Errorf("compile graph: %w", err)
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}
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output, err := r.Invoke(ctx, in)
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if err != nil {
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return nil, fmt.Errorf("invoke pipeline: %w", err)
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}
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return &output, nil
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}
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