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This commit is contained in:
parent
e3ec26a6ef
commit
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@ -1,7 +1,7 @@
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[package]
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[package]
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name = "herodb"
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name = "herodb"
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version = "0.1.0"
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version = "0.1.0"
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edition = "2024"
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edition = "2021"
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description = "A database library built on top of ourdb with model support"
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description = "A database library built on top of ourdb with model support"
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license = "MIT"
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license = "MIT"
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authors = ["HeroCode Team"]
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authors = ["HeroCode Team"]
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83
herodb/examples/minimal_ourdb_example.rs
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83
herodb/examples/minimal_ourdb_example.rs
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@ -0,0 +1,83 @@
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use herodb::db::{DB, DBBuilder, Model};
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use serde::{Deserialize, Serialize};
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use chrono::Utc;
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// Define a simple Product model
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#[derive(Debug, Clone, Serialize, Deserialize)]
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struct SimpleProduct {
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id: u32,
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name: String,
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description: String,
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price: f64,
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created_at: chrono::DateTime<Utc>,
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}
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// Implement the Model trait for SimpleProduct
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impl Model for SimpleProduct {
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fn get_id(&self) -> u32 {
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self.id
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}
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fn db_prefix() -> &'static str {
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"simple_product"
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}
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}
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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println!("OurDB Minimal Example");
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println!("====================\n");
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// Create a temporary directory for the database
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let db_path = std::env::temp_dir().join("herodb_minimal_example");
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std::fs::create_dir_all(&db_path)?;
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println!("Creating database at: {}", db_path.display());
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// Create a new database with SimpleProduct model registered
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let db = DBBuilder::new(db_path.clone())
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.register_model::<SimpleProduct>()
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.build()?;
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println!("Database created successfully");
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// Create a product
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let product = SimpleProduct {
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id: 1,
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name: "Test Product".to_string(),
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description: "A test product for our minimal OurDB example".to_string(),
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price: 99.99,
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created_at: Utc::now(),
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};
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println!("\nCreated product: {}", product.name);
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println!("Product ID: {}", product.get_id());
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// Insert the product into the database
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db.set(&product)?;
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println!("Product saved to database");
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// Retrieve the product from the database
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let retrieved_product = db.get::<SimpleProduct>(product.get_id())?;
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println!("\nRetrieved product from database:");
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println!(" Name: {}", retrieved_product.name);
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println!(" Description: {}", retrieved_product.description);
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println!(" Price: ${}", retrieved_product.price);
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// Delete the product
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db.delete::<SimpleProduct>(product.get_id())?;
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println!("\nProduct deleted from database");
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// Try to retrieve the deleted product (should fail)
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match db.get::<SimpleProduct>(product.get_id()) {
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Ok(_) => println!("Product still exists (unexpected)"),
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Err(e) => println!("Verified deletion: {}", e),
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}
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println!("\nExample completed successfully!");
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// Clean up
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std::fs::remove_dir_all(&db_path)?;
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println!("Cleaned up database directory");
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Ok(())
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}
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@ -21,6 +21,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
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// Create a currency for pricing
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// Create a currency for pricing
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let usd = CurrencyBuilder::new()
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let usd = CurrencyBuilder::new()
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.id(1) // Add an ID for the currency
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.amount(99.99)
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.amount(99.99)
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.currency_code("USD")
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.currency_code("USD")
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.build()
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.build()
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@ -1,144 +0,0 @@
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use bincode;
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use brotli::{CompressorReader, Decompressor};
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use rhai::CustomType;
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use serde::{Deserialize, Serialize};
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use sled;
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use std::fmt::Debug;
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use std::io::Read;
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use std::marker::PhantomData;
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use std::path::Path;
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use thiserror::Error;
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/// Errors that can occur during Sled database operations
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#[derive(Error, Debug)]
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pub enum SledDBError {
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#[error("Sled database error: {0}")]
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SledError(#[from] sled::Error),
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#[error("Serialization/Deserialization error: {0}")]
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SerdeError(#[from] bincode::Error),
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#[error("Compression/Decompression error: {0}")]
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IoError(#[from] std::io::Error),
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#[error("Record not found for ID: {0}")]
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NotFound(String),
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#[error("Type mismatch during deserialization")]
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TypeError,
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#[error("General database error: {0}")]
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GeneralError(String),
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}
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/// Result type for Sled DB operations
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pub type SledDBResult<T> = Result<T, SledDBError>;
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/// Trait for models that can be stored in the Sled database.
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/// Requires `Serialize` and `Deserialize` for the underlying storage mechanism.
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pub trait Storable: Serialize + for<'de> Deserialize<'de> + Sized {
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/// Serializes and compresses the instance using bincode and brotli.
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fn dump(&self) -> SledDBResult<Vec<u8>> {
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let encoded: Vec<u8> = bincode::serialize(self)?;
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let mut compressed = Vec::new();
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// Default Brotli parameters: quality 5, lgwin 22 (window size)
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const BROTLI_QUALITY: u32 = 5;
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const BROTLI_LGWIN: u32 = 22;
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const BUFFER_SIZE: usize = 4096; // 4KB buffer
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let mut compressor =
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CompressorReader::new(&encoded[..], BUFFER_SIZE, BROTLI_QUALITY, BROTLI_LGWIN);
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compressor.read_to_end(&mut compressed)?;
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Ok(compressed)
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}
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/// Deserializes and decompresses data from bytes into an instance.
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fn load_from_bytes(data: &[u8]) -> SledDBResult<Self> {
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let mut decompressed = Vec::new();
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const BUFFER_SIZE: usize = 4096; // 4KB buffer
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let mut decompressor = Decompressor::new(data, BUFFER_SIZE);
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decompressor.read_to_end(&mut decompressed)?;
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let decoded: Self = bincode::deserialize(&decompressed)?;
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Ok(decoded)
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}
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}
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/// Trait identifying a model suitable for the Sled database.
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/// The 'static lifetime bound is required for type identification via Any
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pub trait SledModel: Storable + Debug + Clone + Send + Sync + 'static {
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/// Returns the unique ID for this model instance, used as the key in Sled.
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fn get_id(&self) -> String;
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/// Returns a prefix used for this model type in the Sled database.
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/// Helps to logically separate different model types.
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fn db_prefix() -> &'static str;
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}
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/// A generic database layer on top of Sled.
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#[derive(Clone)]
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pub struct SledDB<T: SledModel> {
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db: sled::Db,
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_phantom: PhantomData<T>,
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}
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impl<T: SledModel> SledDB<T> {
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/// Opens or creates a Sled database at the specified path.
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pub fn open<P: AsRef<Path>>(path: P) -> SledDBResult<Self> {
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let db = sled::open(path)?;
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Ok(Self {
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db,
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_phantom: PhantomData,
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})
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}
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/// Generates the full Sled key using the model's prefix and ID.
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fn get_full_key(id: &str) -> Vec<u8> {
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format!("{}:{}", T::db_prefix(), id).into_bytes()
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}
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/// Inserts or updates a model instance in the database.
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pub fn insert(&self, model: &T) -> SledDBResult<()> {
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let key = Self::get_full_key(&model.get_id());
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let value = model.dump()?;
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self.db.insert(key, value)?;
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// Optionally force a disk flush for durability, but it impacts performance.
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// self.db.flush()?;
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Ok(())
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}
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/// Retrieves a model instance by its ID.
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pub fn get(&self, id: &str) -> SledDBResult<T> {
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let key = Self::get_full_key(id);
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match self.db.get(&key)? {
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Some(ivec) => T::load_from_bytes(&ivec),
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None => Err(SledDBError::NotFound(id.to_string())),
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}
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}
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/// Deletes a model instance by its ID.
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pub fn delete(&self, id: &str) -> SledDBResult<()> {
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let key = Self::get_full_key(id);
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match self.db.remove(&key)? {
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Some(_) => Ok(()),
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None => Err(SledDBError::NotFound(id.to_string())),
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}
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// Optionally flush after delete
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// self.db.flush()?;
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}
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/// Lists all models of this type.
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/// Warning: This can be inefficient for large datasets as it loads all models into memory.
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pub fn list(&self) -> SledDBResult<Vec<T>> {
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let prefix = format!("{}:", T::db_prefix());
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let mut models = Vec::new();
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for result in self.db.scan_prefix(prefix.as_bytes()) {
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let (_key, value) = result?;
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models.push(T::load_from_bytes(&value)?);
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}
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Ok(models)
|
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}
|
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|
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/// Provides access to the underlying Sled Db instance for advanced operations.
|
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pub fn raw_db(&self) -> &sled::Db {
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&self.db
|
|
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}
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}
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@ -1,4 +1,6 @@
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ere/// Macro to implement typed access methods on the DB struct for a given model
|
//! Macros for implementing model methods
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|
/// Macro to implement typed access methods on the DB struct for a given model
|
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#[macro_export]
|
#[macro_export]
|
||||||
macro_rules! impl_model_methods {
|
macro_rules! impl_model_methods {
|
||||||
($model:ty, $singular:ident, $plural:ident) => {
|
($model:ty, $singular:ident, $plural:ident) => {
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@ -1,4 +1,4 @@
|
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s using// Export the error module
|
// Export the error module
|
||||||
pub mod error;
|
pub mod error;
|
||||||
pub use error::{DbError, DbResult};
|
pub use error::{DbError, DbResult};
|
||||||
|
|
||||||
@ -14,5 +14,8 @@ pub use store::{DbOperations, OurDbStore};
|
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pub mod db;
|
pub mod db;
|
||||||
pub use db::{DB, DBBuilder, ModelRegistration, ModelRegistrar};
|
pub use db::{DB, DBBuilder, ModelRegistration, ModelRegistrar};
|
||||||
|
|
||||||
|
// Export the base module (compatibility layer for migration)
|
||||||
|
pub mod base;
|
||||||
|
|
||||||
// Export macros for model methods
|
// Export macros for model methods
|
||||||
pub mod macros;
|
pub mod macros;
|
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|
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178
ourdb_example/Cargo.lock
generated
Normal file
178
ourdb_example/Cargo.lock
generated
Normal file
@ -0,0 +1,178 @@
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|
# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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|
version = 4
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|
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[[package]]
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|
name = "cfg-if"
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|
version = "1.0.0"
|
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|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "crc32fast"
|
||||||
|
version = "1.4.2"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
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|
checksum = "a97769d94ddab943e4510d138150169a2758b5ef3eb191a9ee688de3e23ef7b3"
|
||||||
|
dependencies = [
|
||||||
|
"cfg-if",
|
||||||
|
]
|
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|
|
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|
[[package]]
|
||||||
|
name = "getrandom"
|
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|
version = "0.2.15"
|
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|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
|
||||||
|
dependencies = [
|
||||||
|
"cfg-if",
|
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|
"libc",
|
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|
"wasi",
|
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|
]
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|
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|
[[package]]
|
||||||
|
name = "libc"
|
||||||
|
version = "0.2.172"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
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|
checksum = "d750af042f7ef4f724306de029d18836c26c1765a54a6a3f094cbd23a7267ffa"
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|
|
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|
[[package]]
|
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|
name = "log"
|
||||||
|
version = "0.4.27"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
|
||||||
|
|
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|
[[package]]
|
||||||
|
name = "ourdb"
|
||||||
|
version = "0.1.0"
|
||||||
|
dependencies = [
|
||||||
|
"crc32fast",
|
||||||
|
"log",
|
||||||
|
"rand",
|
||||||
|
"thiserror",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "ourdb_example"
|
||||||
|
version = "0.1.0"
|
||||||
|
dependencies = [
|
||||||
|
"ourdb",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "ppv-lite86"
|
||||||
|
version = "0.2.21"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "85eae3c4ed2f50dcfe72643da4befc30deadb458a9b590d720cde2f2b1e97da9"
|
||||||
|
dependencies = [
|
||||||
|
"zerocopy",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "proc-macro2"
|
||||||
|
version = "1.0.95"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "02b3e5e68a3a1a02aad3ec490a98007cbc13c37cbe84a3cd7b8e406d76e7f778"
|
||||||
|
dependencies = [
|
||||||
|
"unicode-ident",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "quote"
|
||||||
|
version = "1.0.40"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d"
|
||||||
|
dependencies = [
|
||||||
|
"proc-macro2",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "rand"
|
||||||
|
version = "0.8.5"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
|
||||||
|
dependencies = [
|
||||||
|
"libc",
|
||||||
|
"rand_chacha",
|
||||||
|
"rand_core",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "rand_chacha"
|
||||||
|
version = "0.3.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
|
||||||
|
dependencies = [
|
||||||
|
"ppv-lite86",
|
||||||
|
"rand_core",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "rand_core"
|
||||||
|
version = "0.6.4"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
|
||||||
|
dependencies = [
|
||||||
|
"getrandom",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "syn"
|
||||||
|
version = "2.0.100"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
|
||||||
|
dependencies = [
|
||||||
|
"proc-macro2",
|
||||||
|
"quote",
|
||||||
|
"unicode-ident",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "thiserror"
|
||||||
|
version = "1.0.69"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
|
||||||
|
dependencies = [
|
||||||
|
"thiserror-impl",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "thiserror-impl"
|
||||||
|
version = "1.0.69"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
|
||||||
|
dependencies = [
|
||||||
|
"proc-macro2",
|
||||||
|
"quote",
|
||||||
|
"syn",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "unicode-ident"
|
||||||
|
version = "1.0.18"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wasi"
|
||||||
|
version = "0.11.0+wasi-snapshot-preview1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "zerocopy"
|
||||||
|
version = "0.8.24"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "2586fea28e186957ef732a5f8b3be2da217d65c5969d4b1e17f973ebbe876879"
|
||||||
|
dependencies = [
|
||||||
|
"zerocopy-derive",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "zerocopy-derive"
|
||||||
|
version = "0.8.24"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "a996a8f63c5c4448cd959ac1bab0aaa3306ccfd060472f85943ee0750f0169be"
|
||||||
|
dependencies = [
|
||||||
|
"proc-macro2",
|
||||||
|
"quote",
|
||||||
|
"syn",
|
||||||
|
]
|
||||||
7
ourdb_example/Cargo.toml
Normal file
7
ourdb_example/Cargo.toml
Normal file
@ -0,0 +1,7 @@
|
|||||||
|
[package]
|
||||||
|
name = "ourdb_example"
|
||||||
|
version = "0.1.0"
|
||||||
|
edition = "2021"
|
||||||
|
|
||||||
|
[dependencies]
|
||||||
|
ourdb = { path = "../ourdb" }
|
||||||
74
ourdb_example/src/main.rs
Normal file
74
ourdb_example/src/main.rs
Normal file
@ -0,0 +1,74 @@
|
|||||||
|
use ourdb::{OurDB, OurDBConfig, OurDBSetArgs};
|
||||||
|
use std::env::temp_dir;
|
||||||
|
use std::time::{SystemTime, UNIX_EPOCH};
|
||||||
|
|
||||||
|
fn main() -> Result<(), Box<dyn std::error::Error>> {
|
||||||
|
println!("Standalone OurDB Example");
|
||||||
|
println!("=======================\n");
|
||||||
|
|
||||||
|
// Create a temporary directory for the database
|
||||||
|
let timestamp = SystemTime::now()
|
||||||
|
.duration_since(UNIX_EPOCH)
|
||||||
|
.unwrap()
|
||||||
|
.as_secs();
|
||||||
|
let db_path = temp_dir().join(format!("ourdb_example_{}", timestamp));
|
||||||
|
std::fs::create_dir_all(&db_path)?;
|
||||||
|
|
||||||
|
println!("Creating database at: {}", db_path.display());
|
||||||
|
|
||||||
|
// Create a new OurDB instance
|
||||||
|
let config = OurDBConfig {
|
||||||
|
path: db_path.clone(),
|
||||||
|
incremental_mode: true,
|
||||||
|
file_size: None,
|
||||||
|
keysize: None,
|
||||||
|
reset: Some(false),
|
||||||
|
};
|
||||||
|
|
||||||
|
let mut db = OurDB::new(config)?;
|
||||||
|
println!("Database created successfully");
|
||||||
|
|
||||||
|
// Store some data
|
||||||
|
let test_data = b"Hello, OurDB!";
|
||||||
|
let id = db.set(OurDBSetArgs { id: None, data: test_data })?;
|
||||||
|
println!("\nStored data with ID: {}", id);
|
||||||
|
|
||||||
|
// Retrieve the data
|
||||||
|
let retrieved = db.get(id)?;
|
||||||
|
println!("Retrieved data: {}", String::from_utf8_lossy(&retrieved));
|
||||||
|
|
||||||
|
// Update the data
|
||||||
|
let updated_data = b"Updated data in OurDB!";
|
||||||
|
db.set(OurDBSetArgs { id: Some(id), data: updated_data })?;
|
||||||
|
println!("\nUpdated data with ID: {}", id);
|
||||||
|
|
||||||
|
// Retrieve the updated data
|
||||||
|
let retrieved = db.get(id)?;
|
||||||
|
println!("Retrieved updated data: {}", String::from_utf8_lossy(&retrieved));
|
||||||
|
|
||||||
|
// Get history
|
||||||
|
let history = db.get_history(id, 2)?;
|
||||||
|
println!("\nHistory for ID {}:", id);
|
||||||
|
for (i, data) in history.iter().enumerate() {
|
||||||
|
println!(" Version {}: {}", i + 1, String::from_utf8_lossy(data));
|
||||||
|
}
|
||||||
|
|
||||||
|
// Delete the data
|
||||||
|
db.delete(id)?;
|
||||||
|
println!("\nDeleted data with ID: {}", id);
|
||||||
|
|
||||||
|
// Try to retrieve the deleted data (should fail)
|
||||||
|
match db.get(id) {
|
||||||
|
Ok(_) => println!("Data still exists (unexpected)"),
|
||||||
|
Err(e) => println!("Verified deletion: {}", e),
|
||||||
|
}
|
||||||
|
|
||||||
|
println!("\nExample completed successfully!");
|
||||||
|
|
||||||
|
// Clean up
|
||||||
|
db.close()?;
|
||||||
|
std::fs::remove_dir_all(&db_path)?;
|
||||||
|
println!("Cleaned up database directory");
|
||||||
|
|
||||||
|
Ok(())
|
||||||
|
}
|
||||||
74
standalone_ourdb_example.rs
Normal file
74
standalone_ourdb_example.rs
Normal file
@ -0,0 +1,74 @@
|
|||||||
|
use ourdb::{OurDB, OurDBConfig, OurDBSetArgs};
|
||||||
|
use std::env::temp_dir;
|
||||||
|
use std::time::{SystemTime, UNIX_EPOCH};
|
||||||
|
|
||||||
|
fn main() -> Result<(), Box<dyn std::error::Error>> {
|
||||||
|
println!("Standalone OurDB Example");
|
||||||
|
println!("=======================\n");
|
||||||
|
|
||||||
|
// Create a temporary directory for the database
|
||||||
|
let timestamp = SystemTime::now()
|
||||||
|
.duration_since(UNIX_EPOCH)
|
||||||
|
.unwrap()
|
||||||
|
.as_secs();
|
||||||
|
let db_path = temp_dir().join(format!("ourdb_example_{}", timestamp));
|
||||||
|
std::fs::create_dir_all(&db_path)?;
|
||||||
|
|
||||||
|
println!("Creating database at: {}", db_path.display());
|
||||||
|
|
||||||
|
// Create a new OurDB instance
|
||||||
|
let config = OurDBConfig {
|
||||||
|
path: db_path.clone(),
|
||||||
|
incremental_mode: true,
|
||||||
|
file_size: None,
|
||||||
|
keysize: None,
|
||||||
|
reset: Some(false),
|
||||||
|
};
|
||||||
|
|
||||||
|
let mut db = OurDB::new(config)?;
|
||||||
|
println!("Database created successfully");
|
||||||
|
|
||||||
|
// Store some data
|
||||||
|
let test_data = b"Hello, OurDB!";
|
||||||
|
let id = db.set(OurDBSetArgs { id: None, data: test_data })?;
|
||||||
|
println!("\nStored data with ID: {}", id);
|
||||||
|
|
||||||
|
// Retrieve the data
|
||||||
|
let retrieved = db.get(id)?;
|
||||||
|
println!("Retrieved data: {}", String::from_utf8_lossy(&retrieved));
|
||||||
|
|
||||||
|
// Update the data
|
||||||
|
let updated_data = b"Updated data in OurDB!";
|
||||||
|
db.set(OurDBSetArgs { id: Some(id), data: updated_data })?;
|
||||||
|
println!("\nUpdated data with ID: {}", id);
|
||||||
|
|
||||||
|
// Retrieve the updated data
|
||||||
|
let retrieved = db.get(id)?;
|
||||||
|
println!("Retrieved updated data: {}", String::from_utf8_lossy(&retrieved));
|
||||||
|
|
||||||
|
// Get history
|
||||||
|
let history = db.get_history(id, 2)?;
|
||||||
|
println!("\nHistory for ID {}:", id);
|
||||||
|
for (i, data) in history.iter().enumerate() {
|
||||||
|
println!(" Version {}: {}", i + 1, String::from_utf8_lossy(data));
|
||||||
|
}
|
||||||
|
|
||||||
|
// Delete the data
|
||||||
|
db.delete(id)?;
|
||||||
|
println!("\nDeleted data with ID: {}", id);
|
||||||
|
|
||||||
|
// Try to retrieve the deleted data (should fail)
|
||||||
|
match db.get(id) {
|
||||||
|
Ok(_) => println!("Data still exists (unexpected)"),
|
||||||
|
Err(e) => println!("Verified deletion: {}", e),
|
||||||
|
}
|
||||||
|
|
||||||
|
println!("\nExample completed successfully!");
|
||||||
|
|
||||||
|
// Clean up
|
||||||
|
db.close()?;
|
||||||
|
std::fs::remove_dir_all(&db_path)?;
|
||||||
|
println!("Cleaned up database directory");
|
||||||
|
|
||||||
|
Ok(())
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue
Block a user