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

Introduction

Hey there, fellow developer! Ready to supercharge your scheduling game with OnceHub? Let's dive into building a slick Java integration that'll have you managing bookings like a pro. We'll keep things snappy and to the point, so you can get up and running in no time.

Prerequisites

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

• Your favorite Java IDE fired up
• A OnceHub account with API credentials in hand
• An HTTP client library (we'll use OkHttp, but feel free to use your preferred option)

Setting up the project

First things first, let's get our project set up:

1. Create a new Java project in your IDE
2. Add the OkHttp dependency to your pom.xml or build.gradle:

<dependency>
    <groupId>com.squareup.okhttp3</groupId>
    <artifactId>okhttp</artifactId>
    <version>4.10.0</version>
</dependency>

Authentication

OnceHub uses API keys for authentication. Here's how to implement it:

String apiKey = "your_api_key_here";
OkHttpClient client = new OkHttpClient.Builder()
    .addInterceptor(chain -> {
        Request original = chain.request();
        Request request = original.newBuilder()
            .header("Authorization", "Bearer " + apiKey)
            .build();
        return chain.proceed(request);
    })
    .build();

Making API requests

Now, let's create a helper method for API calls:

private String makeApiCall(String endpoint, String method, String body) throws IOException {
    Request.Builder requestBuilder = new Request.Builder()
        .url("https://api.oncehub.com/v2" + endpoint)
        .method(method, body != null ? RequestBody.create(body, MediaType.parse("application/json")) : null);

    Response response = client.newCall(requestBuilder.build()).execute();
    return response.body().string();
}

Implementing key OnceHub features

Let's tackle some core features:

Retrieving booking pages

String bookingPages = makeApiCall("/booking_pages", "GET", null);
System.out.println(bookingPages);

Creating a booking

String bookingData = "{\"booking_page_id\": \"123\", \"date\": \"2023-05-01\", \"time\": \"09:00\"}";
String newBooking = makeApiCall("/bookings", "POST", bookingData);
System.out.println(newBooking);

Handling webhooks

For real-time updates, set up a simple HTTP server to receive webhook events:

HttpServer server = HttpServer.create(new InetSocketAddress(8000), 0);
server.createContext("/webhook", exchange -> {
    String requestBody = new String(exchange.getRequestBody().readAllBytes());
    // Process the webhook payload
    System.out.println("Received webhook: " + requestBody);
    exchange.sendResponseHeaders(200, -1);
});
server.start();

Error handling and logging

Don't forget to wrap your API calls in try-catch blocks and log responses:

try {
    String response = makeApiCall("/booking_pages", "GET", null);
    logger.info("API response: " + response);
} catch (IOException e) {
    logger.error("API call failed", e);
}

Testing the integration

Write some unit tests to ensure your integration is solid:

@Test
public void testGetBookingPages() {
    // Mock the HTTP client and test the getBookingPages method
}

Best practices and optimization

• Implement rate limiting to avoid hitting API limits
• Cache frequently accessed data to reduce API calls
• Use connection pooling for better performance

Conclusion

And there you have it! You've just built a robust OnceHub API integration in Java. Remember to check out the OnceHub API documentation for more details on available endpoints and features.

Now go forth and schedule like a boss! Happy coding! 🚀