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// Copyright 2025 Stoolap Contributors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::fs;
use stoolap::Database;
use tempfile::tempdir;
// WAL constants from the new format
const WAL_ENTRY_MAGIC: u32 = 0x454C4157; // "WALE" in little-endian
#[allow(dead_code)]
const WAL_HEADER_SIZE: u16 = 32;
#[test]
fn test_persistence_wal_dump() {
let dir = tempdir().unwrap();
let db_path = dir.path().join("test.db");
let dsn = format!("file://{}", db_path.display());
eprintln!("=== PHASE 1: Create and Insert ===");
// Phase 1: Create table and insert data
{
let db = Database::open(&dsn).unwrap();
db.execute(
"CREATE TABLE test (id INTEGER PRIMARY KEY, value INTEGER)",
(),
)
.unwrap();
db.execute("INSERT INTO test (id, value) VALUES (1, 100)", ())
.unwrap();
db.execute("INSERT INTO test (id, value) VALUES (2, 200)", ())
.unwrap();
let count: i64 = db.query_one("SELECT COUNT(*) FROM test", ()).unwrap();
eprintln!("Phase 1 count: {}", count);
db.close().unwrap();
}
// Dump WAL using NEW 32-byte header format
let wal_dir = db_path.join("wal");
if wal_dir.exists() {
for entry in fs::read_dir(&wal_dir).unwrap() {
let entry = entry.unwrap();
let content = fs::read(entry.path()).unwrap();
eprintln!(
"\nWAL file: {:?} ({} bytes)",
entry.file_name(),
content.len()
);
// Parse WAL entries using the new 32-byte header format:
// Header: magic(4) + version(1) + flags(1) + header_size(2) + LSN(8) + prev_lsn(8) + entry_size(4) + reserved(4)
// Data: (variable)
// CRC: (4 bytes at end of data)
let mut pos = 0;
let mut entry_num = 0;
while pos + 32 <= content.len() {
// Parse 32-byte header
let magic = u32::from_le_bytes(content[pos..pos + 4].try_into().unwrap());
if magic != WAL_ENTRY_MAGIC {
eprintln!(" Invalid magic at pos {}: 0x{:08x}", pos, magic);
break;
}
let version = content[pos + 4];
let flags = content[pos + 5];
let header_size = u16::from_le_bytes(content[pos + 6..pos + 8].try_into().unwrap());
let lsn = u64::from_le_bytes(content[pos + 8..pos + 16].try_into().unwrap());
let prev_lsn = u64::from_le_bytes(content[pos + 16..pos + 24].try_into().unwrap());
let entry_size =
u32::from_le_bytes(content[pos + 24..pos + 28].try_into().unwrap()) as usize;
eprintln!(" Header {}: magic=WALE, ver={}, flags=0x{:02x}, hdr_size={}, lsn={}, prev_lsn={}, entry_size={}",
entry_num, version, flags, header_size, lsn, prev_lsn, entry_size);
// Skip any extra header bytes (for future extensibility)
let actual_header_size = header_size as usize;
pos += actual_header_size;
if pos + entry_size + 4 > content.len() {
eprintln!(
" Entry {}: truncated - need {} bytes, have {} bytes",
entry_num,
entry_size + 4,
content.len() - pos
);
break;
}
let data = &content[pos..pos + entry_size];
let mut dpos = 0;
// txn_id (8 bytes)
let txn_id = i64::from_le_bytes(data[dpos..dpos + 8].try_into().unwrap());
dpos += 8;
// table_name_len (2 bytes)
let table_len =
u16::from_le_bytes(data[dpos..dpos + 2].try_into().unwrap()) as usize;
dpos += 2;
// table_name
let table_name = String::from_utf8_lossy(&data[dpos..dpos + table_len]);
dpos += table_len;
// row_id (8 bytes)
let row_id = i64::from_le_bytes(data[dpos..dpos + 8].try_into().unwrap());
dpos += 8;
// op (1 byte)
let op = data[dpos];
dpos += 1;
// timestamp (8 bytes)
let _timestamp = i64::from_le_bytes(data[dpos..dpos + 8].try_into().unwrap());
dpos += 8;
// data_len (4 bytes)
let data_len =
u32::from_le_bytes(data[dpos..dpos + 4].try_into().unwrap()) as usize;
dpos += 4;
let payload = &data[dpos..];
let op_name = match op {
1 => "Insert",
2 => "Update",
3 => "Delete",
4 => "Commit",
5 => "Rollback",
6 => "CreateTable",
7 => "DropTable",
8 => "AlterTable",
9 => "CreateIndex",
10 => "DropIndex",
_ => "Unknown",
};
eprintln!(
" Entry {}: LSN={}, txn={}, table='{}', row={}, op={} ({}), data_len={}",
entry_num, lsn, txn_id, table_name, row_id, op, op_name, data_len
);
// For Insert operations, try to print first bytes
if op == 1 && payload.len() >= 24 {
eprintln!(
" Payload (first 50 bytes): {:02x?}",
&payload[..50.min(payload.len())]
);
}
// Skip data + CRC (4 bytes)
pos += entry_size + 4;
entry_num += 1;
}
eprintln!(" Total entries: {}", entry_num);
}
}
eprintln!("\n=== PHASE 2: Reopen and verify ===");
let db = Database::open(&dsn).unwrap();
let count: i64 = db.query_one("SELECT COUNT(*) FROM test", ()).unwrap();
eprintln!("Phase 2 count: {}", count);
if count == 2 {
eprintln!("SUCCESS!");
} else {
eprintln!("FAILURE: Expected 2, got {}", count);
}
assert_eq!(count, 2);
}