summarize

Flyt Summarize Example

A text summarization example demonstrating error handling and retry logic with Flyt.

Features

• Text summarization using OpenAI's GPT-3.5-turbo
• Automatic retry on failures with configurable attempts
• Demonstrates the NewNode helper syntax
• Shows error handling patterns

Prerequisites

• Go 1.21 or later
• OpenAI API key

Setup

1. Set your OpenAI API key:

export OPENAI_API_KEY="your-api-key-here"

2. Install dependencies:

go mod tidy

Running the Example

Basic usage:

go run .

To see retry behavior in action:

# This simulates failures to demonstrate retry logic
SIMULATE_FAILURE=true USE_FALLBACK_DEMO=true go run .

How It Works

The example demonstrates:

1. Simple node creation: Using flyt.NewNode() with custom functions
2. Error handling: Automatic retries with WithMaxRetries() and WithWait()
3. State management: Storing input and output in SharedStore
4. Fallback behavior: Providing a default message when all retries fail

Code Structure

• main.go - Main application with two node implementations
• llm.go - OpenAI API integration
• go.mod - Module dependencies

Key Concepts

Basic Summarization Node

flyt.NewNode(
    flyt.WithPrepFunc(...),    // Read text from SharedStore
    flyt.WithExecFunc(...),    // Call LLM for summarization
    flyt.WithPostFunc(...),    // Store result
    flyt.WithMaxRetries(3),    // Retry up to 3 times
    flyt.WithWait(time.Second), // Wait between retries
)

Error Handling

The framework automatically retries failed operations based on the node configuration. If all retries fail, you can provide a fallback in your main flow logic.