mpackdb

1.5 KB

1. // Worker for multi-process-write.test.js — spawned as a separate node process.
2. // argv: <dbPath> <workerId> <mode>
3. import MPackDB from '../../src/MPackDB.js';
5. const [, , dbPath, workerId, mode] = process.argv;
7. if (mode === 'utxo') {
8. // String-PK store like the blockchain's utxos: insert 15, delete every 3rd
9. const db = new MPackDB(dbPath, { primaryKey: 'id', indexes: ['symbol', '*blockNumber'], compact: false });
10. for (let i = 0; i < 15; i++) {
11. await db.insert({ id: `w${workerId}-${i}`, symbol: `SYM${workerId}`, blockNumber: i, worker: Number(workerId) });
12. }
13. for (let i = 0; i < 15; i += 3) {
14. await db.delete(`w${workerId}-${i}`);
15. }
16. await db.close();
17. process.exit(0);
18. }
20. if (mode === 'numeric') {
21. // Numeric auto-increment PK — ids must be globally unique across processes
22. const db = new MPackDB(dbPath, { primaryKey: '*id', compact: false });
23. const ids = [];
24. for (let i = 0; i < 15; i++) {
25. ids.push(await db.insert({ worker: Number(workerId), i }));
26. }
27. await db.close();
28. console.log(JSON.stringify(ids));
29. process.exit(0);
30. }
32. if (mode === 'live') {
33. // Insert with index persistence disabled, then exit WITHOUT close() (like a
34. // crash): the parent must still see the records via its tail-scan catch-up
35. const db = new MPackDB(dbPath, {
36. primaryKey: 'id',
37. indexes: ['symbol'],
38. compact: false,
39. indexPersistInterval: 0,
40. indexPersistThreshold: 1e9,
41. });
42. for (let i = 0; i < 5; i++) {
43. await db.insert({ id: `live-${i}`, symbol: 'LIVE' });
44. }
45. console.log('INSERTED');
46. process.stdin.once('data', () => process.exit(0));
47. }