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104 lines
3.0 KiB
Go
104 lines
3.0 KiB
Go
/*
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* Copyright 2025 CloudWeGo 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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*/
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package main
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import (
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"context"
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"math/rand"
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"os"
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clc "github.com/cloudwego/eino-ext/callbacks/cozeloop"
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"github.com/cloudwego/eino/callbacks"
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"github.com/cloudwego/eino/compose"
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"github.com/coze-dev/cozeloop-go"
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"github.com/cloudwego/eino-examples/internal/logs"
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)
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func main() {
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cozeloopApiToken := os.Getenv("COZELOOP_API_TOKEN")
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cozeloopWorkspaceID := os.Getenv("COZELOOP_WORKSPACE_ID") // use cozeloop trace, from https://loop.coze.cn/open/docs/cozeloop/go-sdk#4a8c980e
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ctx := context.Background()
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var handlers []callbacks.Handler
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if cozeloopApiToken != "" && cozeloopWorkspaceID != "" {
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client, err := cozeloop.NewClient(
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cozeloop.WithAPIToken(cozeloopApiToken),
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cozeloop.WithWorkspaceID(cozeloopWorkspaceID),
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)
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if err != nil {
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panic(err)
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}
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defer client.Close(ctx)
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handlers = append(handlers, clc.NewLoopHandler(client))
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}
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callbacks.AppendGlobalHandlers(handlers...)
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type bidInput struct {
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Price float64
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Budget float64
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}
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bidder := func(ctx context.Context, in bidInput) (float64, error) {
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if in.Price >= in.Budget {
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return in.Budget, nil
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}
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return in.Price + rand.Float64()*in.Budget, nil
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}
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wf := compose.NewWorkflow[float64, map[string]float64]()
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wf.AddLambdaNode("b1", compose.InvokableLambda(bidder)).
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AddInput(compose.START, compose.ToField("Price")).
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// set 'Budget' field to 3.0 for b1
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SetStaticValue([]string{"Budget"}, 3.0)
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// add a branch just like adding branch in Graph.
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wf.AddBranch("b1", compose.NewGraphBranch(func(ctx context.Context, in float64) (string, error) {
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if in > 5.0 {
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return compose.END, nil
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}
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return "b2", nil
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}, map[string]bool{compose.END: true, "b2": true}))
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wf.AddLambdaNode("b2", compose.InvokableLambda(bidder)).
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// b2 executes strictly after b1, but does not rely on b1's output,
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// which means b2 depends on b1, but no data passing between them.
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AddDependency("b1").
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AddInputWithOptions(compose.START, []*compose.FieldMapping{compose.ToField("Price")}, compose.WithNoDirectDependency()).
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// set 'Budget' field to 4.0 for b2
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SetStaticValue([]string{"Budget"}, 4.0)
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wf.End().AddInput("b1", compose.ToField("bidder1")).
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AddInput("b2", compose.ToField("bidder2"))
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runner, err := wf.Compile(context.Background())
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if err != nil {
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logs.Errorf("workflow compile error: %v", err)
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return
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}
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result, err := runner.Invoke(context.Background(), 3.0)
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if err != nil {
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logs.Errorf("workflow run err: %v", err)
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return
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}
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logs.Infof("%v", result)
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}
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