OODB Case Studies

Overview

ObjectStore is a well-known OODB that has been used in complex applications requiring high performance and scalability. It allows for the persistence of objects and provides ACID transactions.

Key Features

• Support for complex data types
• Automatic object persistence
• Transparent object retrieval

Implementation Example

class Employee {
    String name;
    int id;
    
    public Employee(String name, int id) {
        this.name = name;
        this.id = id;
    }
}

// Storing Employee Object
ObjectStore store = new ObjectStore();
Employee emp = new Employee("John Doe", 123);
store.store(emp);
            

Overview

db4o is an embedded OODB that allows for easy integration with .NET and Java applications. It simplifies the object persistence process without requiring an additional database server.

Key Advantages

• Fast performance due to in-memory operations
• Lightweight and easy to deploy
• Support for native queries

Implementation Example

public class Product {
    public String name;
    public double price;

    public Product(String name, double price) {
        this.name = name;
        this.price = price;
    }
}

// Storing Product Object
using (var db = new Db4oEmbedded.Database("products.db")) {
    var product = new Product("Laptop", 999.99);
    db.Store(product);
}
            

Key Takeaways

• Use OODBs when working with complex data structures.
• Leverage native queries for better performance.
• Ensure proper indexing for faster data retrieval.