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

Introduction

Hey there, fellow developer! Ready to dive into the world of Notion API integration using Java? You're in for a treat. We'll be using the notion-sdk-jvm-core package to make our lives easier. Buckle up, and let's get started!

Prerequisites

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

• A Java development environment (I know you've got this covered!)
• A Notion account and workspace
• Basic understanding of Notion's structure (pages, databases, blocks)

Got all that? Great! Let's move on.

Setting up the Notion Integration

First things first, let's get you set up with Notion:

1. Head over to your Notion workspace
2. Create a new integration (it's super easy, I promise)
3. Grab that shiny new API key – we'll need it soon!

Project Setup

Time to get our hands dirty with some code:

dependencies {
    implementation 'notion-sdk-jvm-core:notion-sdk-jvm-core:1.0.0'
}

Add this to your build.gradle file. Now, let's initialize our NotionClient:

import notion.api.v1.NotionClient;

NotionClient client = new NotionClient("your-api-key-here");

Authentication

See that API key we just used? That's all the authentication we need. Easy peasy!

Basic Operations

Let's start with some basic operations:

Retrieving a Page

Page page = client.retrievePage("page-id-here").execute();

Creating a New Page

PageCreateRequest request = PageCreateRequest.builder()
    .parentPageId("parent-page-id")
    .title("My Awesome New Page")
    .build();

Page newPage = client.createPage(request).execute();

Updating Page Properties

Map<String, PropertyValue> properties = new HashMap<>();
properties.put("Title", new TitlePropertyValue("Updated Title"));

PageUpdateRequest request = PageUpdateRequest.builder()
    .pageId("page-id-here")
    .properties(properties)
    .build();

Page updatedPage = client.updatePage(request).execute();

Working with Databases

Databases are where Notion really shines. Let's see how we can work with them:

Querying a Database

DatabaseQuery query = DatabaseQuery.builder()
    .filter(PropertyFilter.property("Status").equals("Done"))
    .build();

List<Page> results = client.queryDatabase("database-id-here", query).execute().getResults();

Adding Items to a Database

Map<String, PropertyValue> properties = new HashMap<>();
properties.put("Name", new TitlePropertyValue("New Item"));
properties.put("Status", new SelectPropertyValue("In Progress"));

PageCreateRequest request = PageCreateRequest.builder()
    .parentDatabaseId("database-id-here")
    .properties(properties)
    .build();

Page newItem = client.createPage(request).execute();

Handling Blocks

Blocks are the building blocks of Notion (pun intended). Here's how to work with them:

Retrieving Block Children

List<Block> children = client.retrieveBlockChildren("block-id-here").execute().getResults();

Creating New Blocks

List<BlockCreateRequest> blocks = Arrays.asList(
    BlockCreateRequest.builder()
        .paragraph(ParagraphBlockRequest.builder()
            .richText(Arrays.asList(RichTextItemRequest.of("Hello, Notion!")))
            .build())
        .build()
);

List<Block> newBlocks = client.appendBlockChildren("page-id-here", blocks).execute().getResults();

Error Handling and Best Practices

Remember to handle those pesky rate limits and API errors:

try {
    // Your API call here
} catch (APIErrorException e) {
    if (e.getStatus() == 429) {
        // Handle rate limit
        Thread.sleep(e.getRetryAfter() * 1000);
    } else {
        // Handle other errors
    }
}

Conclusion

And there you have it! You're now equipped to build some awesome Notion integrations with Java. Remember, practice makes perfect, so don't be afraid to experiment and push the boundaries of what you can do with the API.

For more advanced topics like pagination, complex filtering, and working with different block types, check out the official Notion API documentation. It's a goldmine of information!

Happy coding, and may your Notion integrations be ever awesome! 🚀

Sample Code Repository

Want to see all of this in action? Check out our GitHub repository for complete examples and more advanced use cases. Don't forget to star it if you find it helpful!