The Real AI Engineer,Trae Learning Guide

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SDK Documentation ​

Overview ​

We provide SDKs for multiple programming languages to help developers quickly integrate our services. This documentation covers installation, configuration, and usage methods for all official SDKs.

Supported SDKs ​

JavaScript/TypeScript SDK ​

Installation ​

bash
# npm
npm install @yourapp/sdk

# yarn
yarn add @yourapp/sdk

# pnpm
pnpm add @yourapp/sdk

Basic Usage ​

javascript
import { YourAppSDK } from '@yourapp/sdk';

// Initialize SDK
const sdk = new YourAppSDK({
  apiKey: 'your-api-key',
  environment: 'production', // or 'sandbox'
  timeout: 30000
});

// User management
const user = await sdk.users.create({
  email: 'user@example.com',
  name: 'John Doe'
});

// Project management
const project = await sdk.projects.create({
  name: 'My Project',
  description: 'Project description'
});

// File upload
const file = await sdk.files.upload({
  file: fileBuffer,
  filename: 'document.pdf',
  projectId: project.id
});

TypeScript Support ​

typescript
import { YourAppSDK, User, Project, CreateUserRequest } from '@yourapp/sdk';

const sdk = new YourAppSDK({
  apiKey: process.env.YOURAPP_API_KEY!,
  environment: 'production'
});

// Type-safe user creation
const createUser = async (userData: CreateUserRequest): Promise<User> => {
  return await sdk.users.create(userData);
};

// Type-safe project query
const getProjects = async (): Promise<Project[]> => {
  return await sdk.projects.list({
    limit: 10,
    offset: 0
  });
};

Python SDK ​

Installation ​

bash
pip install yourapp-sdk

Basic Usage ​

python
from yourapp_sdk import YourAppSDK
from yourapp_sdk.exceptions import YourAppError

# Initialize SDK
sdk = YourAppSDK(
    api_key='your-api-key',
    environment='production',
    timeout=30
)

# User management
try:
    user = sdk.users.create(
        email='user@example.com',
        name='John Doe'
    )
    print(f'Created user: {user.id}')
except YourAppError as e:
    print(f'Error creating user: {e.message}')

# Project management
project = sdk.projects.create(
    name='My Project',
    description='Project description'
)

# File upload
with open('document.pdf', 'rb') as file:
    uploaded_file = sdk.files.upload(
        file=file,
        filename='document.pdf',
        project_id=project.id
    )

Async Support ​

python
import asyncio
from yourapp_sdk import AsyncYourAppSDK

async def main():
    # Async SDK initialization
    sdk = AsyncYourAppSDK(
        api_key='your-api-key',
        environment='production'
    )
    
    # Async user creation
    user = await sdk.users.create(
        email='user@example.com',
        name='John Doe'
    )
    
    # Async project list
    projects = await sdk.projects.list(limit=10)
    
    # Close connection
    await sdk.close()

# Run async code
asyncio.run(main())

Go SDK ​

Installation ​

bash
go get github.com/yourapp/sdk-go

Basic Usage ​

go
package main

import (
    "context"
    "fmt"
    "log"
    
    "github.com/yourapp/sdk-go"
)

func main() {
    // Initialize SDK
    client := yourapp.NewClient(&yourapp.Config{
        APIKey:      "your-api-key",
        Environment: "production",
        Timeout:     30 * time.Second,
    })
    
    ctx := context.Background()
    
    // User management
    user, err := client.Users.Create(ctx, &yourapp.CreateUserRequest{
        Email: "user@example.com",
        Name:  "John Doe",
    })
    if err != nil {
        log.Fatalf("Failed to create user: %v", err)
    }
    fmt.Printf("Created user: %s\n", user.ID)
    
    // Project management
    project, err := client.Projects.Create(ctx, &yourapp.CreateProjectRequest{
        Name:        "My Project",
        Description: "Project description",
    })
    if err != nil {
        log.Fatalf("Failed to create project: %v", err)
    }
    
    // File upload
    file, err := os.Open("document.pdf")
    if err != nil {
        log.Fatalf("Failed to open file: %v", err)
    }
    defer file.Close()
    
    uploadedFile, err := client.Files.Upload(ctx, &yourapp.UploadFileRequest{
        File:      file,
        Filename:  "document.pdf",
        ProjectID: project.ID,
    })
    if err != nil {
        log.Fatalf("Failed to upload file: %v", err)
    }
    fmt.Printf("Uploaded file: %s\n", uploadedFile.ID)
}

Java SDK ​

Installation ​

Maven

xml
<dependency>
    <groupId>com.yourapp</groupId>
    <artifactId>yourapp-sdk</artifactId>
    <version>1.0.0</version>
</dependency>

Gradle

gradle
implementation 'com.yourapp:yourapp-sdk:1.0.0'

Basic Usage ​

java
import com.yourapp.sdk.YourAppSDK;
import com.yourapp.sdk.models.*;
import com.yourapp.sdk.exceptions.YourAppException;

public class Example {
    public static void main(String[] args) {
        // Initialize SDK
        YourAppSDK sdk = YourAppSDK.builder()
            .apiKey("your-api-key")
            .environment(Environment.PRODUCTION)
            .timeout(Duration.ofSeconds(30))
            .build();
        
        try {
            // User management
            CreateUserRequest userRequest = CreateUserRequest.builder()
                .email("user@example.com")
                .name("John Doe")
                .build();
            
            User user = sdk.users().create(userRequest);
            System.out.println("Created user: " + user.getId());
            
            // Project management
            CreateProjectRequest projectRequest = CreateProjectRequest.builder()
                .name("My Project")
                .description("Project description")
                .build();
            
            Project project = sdk.projects().create(projectRequest);
            
            // File upload
            File file = new File("document.pdf");
            UploadFileRequest uploadRequest = UploadFileRequest.builder()
                .file(file)
                .filename("document.pdf")
                .projectId(project.getId())
                .build();
            
            UploadedFile uploadedFile = sdk.files().upload(uploadRequest);
            System.out.println("Uploaded file: " + uploadedFile.getId());
            
        } catch (YourAppException e) {
            System.err.println("SDK Error: " + e.getMessage());
        }
    }
}

PHP SDK ​

Installation ​

bash
composer require yourapp/sdk

Basic Usage ​

php
<?php
require_once 'vendor/autoload.php';

use YourApp\SDK\YourAppSDK;
use YourApp\SDK\Exceptions\YourAppException;

// Initialize SDK
$sdk = new YourAppSDK([
    'api_key' => 'your-api-key',
    'environment' => 'production',
    'timeout' => 30
]);

try {
    // User management
    $user = $sdk->users->create([
        'email' => 'user@example.com',
        'name' => 'John Doe'
    ]);
    echo "Created user: {$user['id']}\n";
    
    // Project management
    $project = $sdk->projects->create([
        'name' => 'My Project',
        'description' => 'Project description'
    ]);
    
    // File upload
    $uploadedFile = $sdk->files->upload([
        'file' => fopen('document.pdf', 'r'),
        'filename' => 'document.pdf',
        'project_id' => $project['id']
    ]);
    echo "Uploaded file: {$uploadedFile['id']}\n";
    
} catch (YourAppException $e) {
    echo "SDK Error: {$e->getMessage()}\n";
}
?>

Ruby SDK ​

Installation ​

bash
gem install yourapp-sdk

Basic Usage ​

ruby
require 'yourapp-sdk'

# Initialize SDK
sdk = YourApp::SDK.new(
  api_key: 'your-api-key',
  environment: 'production',
  timeout: 30
)

begin
  # User management
  user = sdk.users.create(
    email: 'user@example.com',
    name: 'John Doe'
  )
  puts "Created user: #{user.id}"
  
  # Project management
  project = sdk.projects.create(
    name: 'My Project',
    description: 'Project description'
  )
  
  # File upload
  File.open('document.pdf', 'rb') do |file|
    uploaded_file = sdk.files.upload(
      file: file,
      filename: 'document.pdf',
      project_id: project.id
    )
    puts "Uploaded file: #{uploaded_file.id}"
  end
  
rescue YourApp::SDK::Error => e
  puts "SDK Error: #{e.message}"
end

Configuration Options ​

Common Configuration ​

All SDKs support the following configuration options:

javascript
const config = {
  // Required configuration
  apiKey: 'your-api-key',
  
  // Environment configuration
  environment: 'production', // 'production' | 'sandbox'
  baseUrl: 'https://api.yourapp.com', // Custom API endpoint
  
  // Network configuration
  timeout: 30000, // Request timeout (milliseconds)
  retries: 3,     // Number of retries
  retryDelay: 1000, // Retry delay (milliseconds)
  
  // Logging configuration
  logLevel: 'info', // 'debug' | 'info' | 'warn' | 'error'
  logger: customLogger, // Custom logger
  
  // Proxy configuration
  proxy: {
    host: 'proxy.example.com',
    port: 8080,
    auth: {
      username: 'proxy-user',
      password: 'proxy-pass'
    }
  }
};

Environment Variables ​

All SDKs support configuration through environment variables:

bash
# API Key
export YOURAPP_API_KEY="your-api-key"

# Environment
export YOURAPP_ENVIRONMENT="production"

# Custom endpoint
export YOURAPP_BASE_URL="https://api.yourapp.com"

# Timeout setting
export YOURAPP_TIMEOUT="30000"

# Log level
export YOURAPP_LOG_LEVEL="info"

Error Handling ​

Error Types ​

All SDKs provide unified error handling mechanisms:

javascript
try {
  const user = await sdk.users.create(userData);
} catch (error) {
  if (error instanceof YourAppError) {
    switch (error.type) {
      case 'AUTHENTICATION_ERROR':
        console.error('Invalid API key');
        break;
      case 'VALIDATION_ERROR':
        console.error('Invalid input:', error.details);
        break;
      case 'RATE_LIMIT_ERROR':
        console.error('Rate limit exceeded');
        break;
      case 'NETWORK_ERROR':
        console.error('Network connection failed');
        break;
      case 'SERVER_ERROR':
        console.error('Server error:', error.message);
        break;
      default:
        console.error('Unknown error:', error.message);
    }
  }
}

Retry Mechanism ​

javascript
// Configure automatic retry
const sdk = new YourAppSDK({
  apiKey: 'your-api-key',
  retries: 3,
  retryDelay: 1000,
  retryConditions: [
    'NETWORK_ERROR',
    'RATE_LIMIT_ERROR',
    'SERVER_ERROR'
  ]
});

// Manual retry
const retryOperation = async (operation, maxRetries = 3) => {
  for (let i = 0; i < maxRetries; i++) {
    try {
      return await operation();
    } catch (error) {
      if (i === maxRetries - 1 || !isRetryableError(error)) {
        throw error;
      }
      await new Promise(resolve => setTimeout(resolve, 1000 * (i + 1)));
    }
  }
};

Pagination Handling ​

Automatic Pagination ​

javascript
// Get all projects (automatic pagination)
const allProjects = [];
for await (const project of sdk.projects.listAll()) {
  allProjects.push(project);
}

// Or use toArray() method
const projects = await sdk.projects.listAll().toArray();

Manual Pagination ​

javascript
// Manual pagination control
let hasMore = true;
let offset = 0;
const limit = 50;
const allProjects = [];

while (hasMore) {
  const response = await sdk.projects.list({
    limit,
    offset
  });
  
  allProjects.push(...response.data);
  
  hasMore = response.hasMore;
  offset += limit;
}

Batch Operations ​

Batch Creation ​

javascript
// Batch create users
const users = await sdk.users.createBatch([
  { email: 'user1@example.com', name: 'User 1' },
  { email: 'user2@example.com', name: 'User 2' },
  { email: 'user3@example.com', name: 'User 3' }
]);

// Batch update
const updatedUsers = await sdk.users.updateBatch([
  { id: 'user1', name: 'Updated User 1' },
  { id: 'user2', name: 'Updated User 2' }
]);

Batch Deletion ​

javascript
// Batch delete
const result = await sdk.users.deleteBatch(['user1', 'user2', 'user3']);
console.log(`Deleted ${result.deletedCount} users`);

File Handling ​

File Upload ​

javascript
// Single file upload
const file = await sdk.files.upload({
  file: fileBuffer,
  filename: 'document.pdf',
  contentType: 'application/pdf',
  projectId: 'project123'
});

// Multiple file upload
const files = await sdk.files.uploadMultiple([
  {
    file: file1Buffer,
    filename: 'doc1.pdf',
    contentType: 'application/pdf'
  },
  {
    file: file2Buffer,
    filename: 'doc2.pdf',
    contentType: 'application/pdf'
  }
], {
  projectId: 'project123'
});

// Large file chunked upload
const largeFile = await sdk.files.uploadLarge({
  file: largeFileBuffer,
  filename: 'large-video.mp4',
  contentType: 'video/mp4',
  chunkSize: 5 * 1024 * 1024, // 5MB chunks
  onProgress: (progress) => {
    console.log(`Upload progress: ${progress.percentage}%`);
  }
});

File Download ​

javascript
// Download file
const fileStream = await sdk.files.download('file123');

// Download to local file
await sdk.files.downloadToFile('file123', './downloaded-file.pdf');

// Get download URL
const downloadUrl = await sdk.files.getDownloadUrl('file123', {
  expiresIn: 3600 // 1 hour
});

Real-time Features ​

WebSocket Connection ​

javascript
// Establish WebSocket connection
const ws = sdk.realtime.connect({
  channels: ['project.updates', 'user.notifications']
});

// Listen to events
ws.on('project.updated', (data) => {
  console.log('Project updated:', data);
});

ws.on('user.notification', (data) => {
  console.log('New notification:', data);
});

// Send message
ws.send('project.message', {
  projectId: 'project123',
  message: 'Hello team!'
});

// Close connection
ws.close();

Server-Sent Events (SSE) ​

javascript
// Listen to server-sent events
const eventSource = sdk.events.subscribe({
  channels: ['project.updates']
});

eventSource.on('message', (event) => {
  console.log('Received event:', event);
});

eventSource.on('error', (error) => {
  console.error('SSE error:', error);
});

// Close connection
eventSource.close();

Caching ​

Memory Cache ​

javascript
// Enable memory cache
const sdk = new YourAppSDK({
  apiKey: 'your-api-key',
  cache: {
    enabled: true,
    ttl: 300, // 5 minutes
    maxSize: 1000 // Maximum cache items
  }
});

// Manual cache control
const user = await sdk.users.get('user123', {
  cache: true,
  cacheTtl: 600 // 10 minutes
});

// Clear cache
sdk.cache.clear();
sdk.cache.delete('users:user123');

Redis Cache ​

javascript
// Use Redis cache
const sdk = new YourAppSDK({
  apiKey: 'your-api-key',
  cache: {
    type: 'redis',
    redis: {
      host: 'localhost',
      port: 6379,
      password: 'redis-password'
    },
    ttl: 300
  }
});

Testing ​

Mock Mode ​

javascript
// Enable mock mode for testing
const sdk = new YourAppSDK({
  apiKey: 'test-api-key',
  environment: 'test',
  mock: true
});

// All API calls will return mock data
const user = await sdk.users.create({
  email: 'test@example.com',
  name: 'Test User'
});
// Returns mock user object

Testing Tools ​

javascript
// Jest test example
import { YourAppSDK } from '@yourapp/sdk';
import { mockSDK } from '@yourapp/sdk/testing';

describe('User Service', () => {
  let sdk;
  
  beforeEach(() => {
    sdk = mockSDK();
  });
  
  test('should create user', async () => {
    const userData = {
      email: 'test@example.com',
      name: 'Test User'
    };
    
    sdk.users.create.mockResolvedValue({
      id: 'user123',
      ...userData
    });
    
    const user = await sdk.users.create(userData);
    
    expect(user.id).toBe('user123');
    expect(sdk.users.create).toHaveBeenCalledWith(userData);
  });
});

Performance Optimization ​

Connection Pool ​

javascript
// Configure connection pool
const sdk = new YourAppSDK({
  apiKey: 'your-api-key',
  http: {
    poolSize: 10,
    keepAlive: true,
    keepAliveMsecs: 30000
  }
});

Request Batching ​

javascript
// Automatically batch similar requests
const sdk = new YourAppSDK({
  apiKey: 'your-api-key',
  batching: {
    enabled: true,
    batchSize: 10,
    batchDelay: 100 // 100ms
  }
});

// These requests will be automatically batched
const [user1, user2, user3] = await Promise.all([
  sdk.users.get('user1'),
  sdk.users.get('user2'),
  sdk.users.get('user3')
]);

Monitoring and Logging ​

Custom Logger ​

javascript
// Custom logger
const customLogger = {
  debug: (message, meta) => console.debug('[DEBUG]', message, meta),
  info: (message, meta) => console.info('[INFO]', message, meta),
  warn: (message, meta) => console.warn('[WARN]', message, meta),
  error: (message, meta) => console.error('[ERROR]', message, meta)
};

const sdk = new YourAppSDK({
  apiKey: 'your-api-key',
  logger: customLogger,
  logLevel: 'debug'
});

Metrics Collection ​

javascript
// Enable metrics collection
const sdk = new YourAppSDK({
  apiKey: 'your-api-key',
  metrics: {
    enabled: true,
    collector: (metrics) => {
      // Send metrics to monitoring system
      console.log('SDK Metrics:', metrics);
    }
  }
});

// Get SDK metrics
const metrics = sdk.getMetrics();
console.log('Request count:', metrics.requestCount);
console.log('Average response time:', metrics.avgResponseTime);
console.log('Error rate:', metrics.errorRate);

Migration Guide ​

From v1 to v2 ​

javascript
// v1 (old version)
const sdk = new YourAppSDK('your-api-key');
const user = await sdk.createUser({
  email: 'user@example.com',
  name: 'John Doe'
});

// v2 (new version)
const sdk = new YourAppSDK({
  apiKey: 'your-api-key'
});
const user = await sdk.users.create({
  email: 'user@example.com',
  name: 'John Doe'
});

Compatibility Layer ​

javascript
// Use compatibility layer to support legacy code
const sdk = new YourAppSDK({
  apiKey: 'your-api-key',
  compatibility: 'v1' // Enable v1 compatibility mode
});

// v1 style calls still work
const user = await sdk.createUser(userData);

Troubleshooting ​

Common Issues ​

Authentication Failure ​

javascript
// Check API key
if (!process.env.YOURAPP_API_KEY) {
  throw new Error('YOURAPP_API_KEY environment variable is required');
}

// Validate API key format
if (!process.env.YOURAPP_API_KEY.startsWith('ya_')) {
  throw new Error('Invalid API key format');
}

Network Connection Issues ​

javascript
// Test network connection
const testConnection = async () => {
  try {
    const response = await sdk.health.check();
    console.log('Connection OK:', response);
  } catch (error) {
    console.error('Connection failed:', error.message);
    
    // Check proxy settings
    if (error.code === 'ECONNREFUSED') {
      console.log('Check proxy settings and firewall');
    }
  }
};

Rate Limiting ​

javascript
// Handle rate limiting
const handleRateLimit = async (operation) => {
  try {
    return await operation();
  } catch (error) {
    if (error.type === 'RATE_LIMIT_ERROR') {
      const retryAfter = error.retryAfter || 60;
      console.log(`Rate limited. Retrying after ${retryAfter} seconds`);
      
      await new Promise(resolve => 
        setTimeout(resolve, retryAfter * 1000)
      );
      
      return await operation();
    }
    throw error;
  }
};

Debug Mode ​

javascript
// Enable debug mode
const sdk = new YourAppSDK({
  apiKey: 'your-api-key',
  debug: true,
  logLevel: 'debug'
});

// Or via environment variables
process.env.YOURAPP_DEBUG = 'true';
process.env.YOURAPP_LOG_LEVEL = 'debug';

Best Practices ​

Error Handling ​

javascript
// Comprehensive error handling
const createUserSafely = async (userData) => {
  try {
    return await sdk.users.create(userData);
  } catch (error) {
    // Log error
    logger.error('Failed to create user', {
      error: error.message,
      userData: { email: userData.email } // Don't log sensitive info
    });
    
    // Handle based on error type
    if (error.type === 'VALIDATION_ERROR') {
      throw new Error(`Invalid user data: ${error.details.join(', ')}`);
    }
    
    if (error.type === 'RATE_LIMIT_ERROR') {
      // Implement backoff retry
      await new Promise(resolve => setTimeout(resolve, error.retryAfter * 1000));
      return await createUserSafely(userData);
    }
    
    // Re-throw other errors
    throw error;
  }
};

Resource Management ​

javascript
// Proper resource management
class UserService {
  constructor() {
    this.sdk = new YourAppSDK({
      apiKey: process.env.YOURAPP_API_KEY
    });
  }
  
  async createUser(userData) {
    return await this.sdk.users.create(userData);
  }
  
  // Clean up resources
  async close() {
    await this.sdk.close();
  }
}

// Usage example
const userService = new UserService();

try {
  const user = await userService.createUser(userData);
} finally {
  await userService.close();
}

Configuration Management ​

javascript
// Environment-specific configuration
const getSDKConfig = () => {
  const environment = process.env.NODE_ENV || 'development';
  
  const baseConfig = {
    apiKey: process.env.YOURAPP_API_KEY,
    timeout: 30000
  };
  
  switch (environment) {
    case 'production':
      return {
        ...baseConfig,
        environment: 'production',
        logLevel: 'warn',
        retries: 3
      };
    
    case 'staging':
      return {
        ...baseConfig,
        environment: 'sandbox',
        logLevel: 'info',
        retries: 2
      };
    
    default:
      return {
        ...baseConfig,
        environment: 'sandbox',
        logLevel: 'debug',
        retries: 1
      };
  }
};

const sdk = new YourAppSDK(getSDKConfig());

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