Step by Step Guide to Building a ServiceTitan API Integration in Java

Introduction

Hey there, fellow developer! Ready to dive into the world of ServiceTitan API integration? You're in for a treat. We'll be walking through the process of building a robust integration in Java, giving you the power to tap into ServiceTitan's vast ecosystem of field service management tools. Let's get cracking!

Prerequisites

Before we jump in, make sure you've got these essentials:

• A Java development environment (I know you've got this covered!)
• ServiceTitan API credentials (if you don't have these yet, reach out to the ServiceTitan team)
• An HTTP client library (we'll be using OkHttp in this guide, but feel free to use your favorite)

Authentication

First things first, let's get you authenticated:

public String getAccessToken() {
    // Implementation to obtain access token
}

public void refreshToken() {
    // Logic to refresh the token when it expires
}

Pro tip: Implement a token refresh mechanism to keep your integration running smoothly without manual intervention.

Setting Up the Project

Let's get our project structure in order:

src/
├── main/
│   └── java/
│       └── com/
│           └── yourcompany/
│               └── servicetitan/
│                   ├── ApiClient.java
│                   ├── CustomerService.java
│                   ├── JobService.java
│                   └── InvoiceService.java
└── test/
    └── java/
        └── com/
            └── yourcompany/
                └── servicetitan/
                    ├── ApiClientTest.java
                    ├── CustomerServiceTest.java
                    ├── JobServiceTest.java
                    └── InvoiceServiceTest.java

Don't forget to add your dependencies to your pom.xml or build.gradle file!

Creating the API Client

Here's where the magic happens:

public class ApiClient {
    private static final String BASE_URL = "https://api.servicetitan.io/v2";
    private final OkHttpClient client;

    public ApiClient(String accessToken) {
        this.client = new OkHttpClient.Builder()
            .addInterceptor(chain -> chain.proceed(chain.request().newBuilder()
                .addHeader("Authorization", "Bearer " + accessToken)
                .build()))
            .build();
    }

    public String get(String endpoint) throws IOException {
        Request request = new Request.Builder()
            .url(BASE_URL + endpoint)
            .build();
        try (Response response = client.newCall(request).execute()) {
            return response.body().string();
        }
    }

    // Implement post(), put(), delete() methods similarly
}

Implementing Key API Operations

Let's tackle some core operations:

public class CustomerService {
    private final ApiClient apiClient;

    public CustomerService(ApiClient apiClient) {
        this.apiClient = apiClient;
    }

    public String getCustomers() throws IOException {
        return apiClient.get("/customers");
    }

    // Implement other customer-related operations
}

// Create similar classes for JobService and InvoiceService

Data Mapping and Serialization

Time to turn that JSON into Java objects:

public class Customer {
    private int id;
    private String name;
    // Other fields and getters/setters
}

// Use a JSON library like Jackson or Gson for parsing
ObjectMapper mapper = new ObjectMapper();
Customer customer = mapper.readValue(jsonString, Customer.class);

Handling Pagination and Rate Limiting

Don't let those pesky limits slow you down:

public List<Customer> getAllCustomers() throws IOException {
    List<Customer> allCustomers = new ArrayList<>();
    String nextPageToken = null;
    do {
        String response = apiClient.get("/customers" + (nextPageToken != null ? "?pageToken=" + nextPageToken : ""));
        JsonNode root = mapper.readTree(response);
        allCustomers.addAll(mapper.convertValue(root.get("data"), new TypeReference<List<Customer>>(){}));
        nextPageToken = root.get("nextPageToken").asText();
        Thread.sleep(100); // Respect rate limits
    } while (nextPageToken != null);
    return allCustomers;
}

Error Handling and Logging

Keep your integration robust with proper error handling:

try {
    String response = apiClient.get("/customers");
    // Process response
} catch (IOException e) {
    logger.error("Error fetching customers: " + e.getMessage());
    // Handle the error appropriately
}

Testing the Integration

Don't forget to test! Here's a quick example:

@Test
public void testGetCustomers() throws IOException {
    CustomerService service = new CustomerService(new ApiClient("test-token"));
    String customers = service.getCustomers();
    assertNotNull(customers);
    // Add more assertions as needed
}

Best Practices and Optimization

• Implement caching to reduce API calls
• Use asynchronous operations for non-blocking calls
• Batch operations when possible to minimize network requests

Conclusion

And there you have it! You've just built a solid foundation for your ServiceTitan API integration in Java. Remember, this is just the beginning. There's a whole world of possibilities to explore with the ServiceTitan API. Keep experimenting, keep building, and most importantly, keep coding!

Happy integrating, and may your code always compile on the first try! 🚀