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81 lines
2.0 KiB
Go
81 lines
2.0 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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"github.com/cloudwego/eino/compose"
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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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type calculator struct {
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Add []int
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Multiply int
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}
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adder := func(ctx context.Context, in []int) (out int, err error) {
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for _, i := range in {
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out += i
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}
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return out, nil
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}
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type mul struct {
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A int
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B int
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}
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multiplier := func(ctx context.Context, m mul) (int, error) {
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return m.A * m.B, nil
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}
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wf := compose.NewWorkflow[calculator, int]()
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wf.AddLambdaNode("adder", compose.InvokableLambda(adder)).
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AddInput(compose.START, compose.FromField("Add"))
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wf.AddLambdaNode("mul", compose.InvokableLambda(multiplier)).
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AddInput("adder", compose.ToField("A")).
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AddInputWithOptions(compose.START, []*compose.FieldMapping{compose.MapFields("Multiply", "B")},
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// use WithNoDirectDependency to declare a 'data-only' dependency,
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// in this case, START node's execution status will not determine whether 'mul' node can execute.
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// START node only passes one field of its output to 'mul' node.
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compose.WithNoDirectDependency())
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wf.End().AddInput("mul")
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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(), calculator{
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Add: []int{2, 5},
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Multiply: 3,
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})
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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("%d", result)
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}
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