Event Sourcing
Event, sourcing, mein, EK, ENTITY, ka, CURRENT, STATE, STORE, karne, ke, BAJAYE, USPAR, HUE, SAARE, CHANGES, (events) STORE, kiye, jaate, HAIN — jaise, "OrderCreated", "ItemAdded", "OrderShipped" — CURRENT, state, in, EVENTS, ko, REPLAY, karके, DERIVE, ki, ja, sakti, hai.
Ye, APPROACH, EK, COMPLETE, AUDIT, LOG, deta hai — HAR, CHANGE, KI, HISTORY, ALWAYS, AVAILABLE, hai — DEBUGGING, aur, COMPLIANCE, requirements, ke, liye, POWERFUL, hai.
// Traditional (current state, only):
{ orderId: 123, status: "shipped", total: 500 }
// Event sourced (poori, history):
[
{ type: "OrderCreated", orderId: 123, total: 500 },
{ type: "PaymentReceived", orderId: 123 },
{ type: "OrderShipped", orderId: 123 }
]
// current, state, = SAARE, events, ko, replay, karke, DERIVE, kiya, jaata, hai- Event sourcing = current state, ki, JAGAH, saare, changes, (events) store, kiye, jaate, hain
- Complete audit log, deta, hai — HISTORY, ALWAYS, available
- Snapshots, se, performance, improve, ki, ja, sakti, hai (bina, sab, events, replay, kiye)
Event, sourcing, mein, EK, BUG, fix, karne, ke, BAAD, SAARE, EVENTS, ko, DOBARA, REPLAY, karके, EK, CORRECTED, state, DERIVE, ki, ja, sakti, hai — YE, EK, POWERFUL, DEBUGGING, aur, RECOVERY, CAPABILITY, hai, JO, traditional, systems, mein, NAHI, HOTI.
// Bug fix, ke, baad, events, replay, karke, state, rebuild:
const currentState = events.reduce(applyEvent, initialState);Event, sourcing, EK, CHALLENGE, create, karta hai, GDPR, jaisi, "RIGHT, TO, BE, FORGOTTEN" requirements, ke, saath — EVENTS, IMMUTABLE, hote, hain, isliye, USER, data, ko, "DELETE" karna, MUSHKIL, hai — encryption-based, "crypto-shredding" (encryption, key, delete, karna) EK, COMMON, SOLUTION, hai.