feat: CRM Clinicas SaaS - MVP completo
- Auth: Login/Register con creacion de clinica - Dashboard: KPIs reales, graficas recharts - Pacientes: CRUD completo con busqueda - Agenda: FullCalendar, drag-and-drop, vista recepcion - Expediente: Notas SOAP, signos vitales, CIE-10 - Facturacion: Facturas con IVA, campos CFDI SAT - Inventario: Productos, stock, movimientos, alertas - Configuracion: Clinica, equipo, catalogo servicios - Supabase self-hosted: 18 tablas con RLS multi-tenant - Docker + Nginx para produccion Co-Authored-By: claude-flow <ruv@ruv.net>
This commit is contained in:
Consultoria AS
997
.claude/agents/consensus/crdt-synchronizer.md
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997
.claude/agents/consensus/crdt-synchronizer.md
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@@ -0,0 +1,997 @@
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---
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name: crdt-synchronizer
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type: synchronizer
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color: "#4CAF50"
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description: Implements Conflict-free Replicated Data Types for eventually consistent state synchronization
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capabilities:
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- state_based_crdts
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- operation_based_crdts
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- delta_synchronization
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- conflict_resolution
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- causal_consistency
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priority: high
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hooks:
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pre: |
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echo "🔄 CRDT Synchronizer syncing: $TASK"
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# Initialize CRDT state tracking
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if [[ "$TASK" == *"synchronization"* ]]; then
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echo "📊 Preparing delta state computation"
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fi
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post: |
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echo "🎯 CRDT synchronization complete"
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# Verify eventual consistency
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echo "✅ Validating conflict-free state convergence"
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---
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# CRDT Synchronizer
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Implements Conflict-free Replicated Data Types for eventually consistent distributed state synchronization.
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## Core Responsibilities
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1. **CRDT Implementation**: Deploy state-based and operation-based conflict-free data types
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2. **Data Structure Management**: Handle counters, sets, registers, and composite structures
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3. **Delta Synchronization**: Implement efficient incremental state updates
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4. **Conflict Resolution**: Ensure deterministic conflict-free merge operations
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5. **Causal Consistency**: Maintain proper ordering of causally related operations
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## Technical Implementation
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### Base CRDT Framework
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```javascript
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class CRDTSynchronizer {
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constructor(nodeId, replicationGroup) {
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this.nodeId = nodeId;
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this.replicationGroup = replicationGroup;
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this.crdtInstances = new Map();
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this.vectorClock = new VectorClock(nodeId);
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this.deltaBuffer = new Map();
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this.syncScheduler = new SyncScheduler();
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this.causalTracker = new CausalTracker();
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}
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// Register CRDT instance
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registerCRDT(name, crdtType, initialState = null) {
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const crdt = this.createCRDTInstance(crdtType, initialState);
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this.crdtInstances.set(name, crdt);
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// Subscribe to CRDT changes for delta tracking
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crdt.onUpdate((delta) => {
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this.trackDelta(name, delta);
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});
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return crdt;
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}
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// Create specific CRDT instance
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createCRDTInstance(type, initialState) {
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switch (type) {
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case 'G_COUNTER':
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return new GCounter(this.nodeId, this.replicationGroup, initialState);
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case 'PN_COUNTER':
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return new PNCounter(this.nodeId, this.replicationGroup, initialState);
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case 'OR_SET':
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return new ORSet(this.nodeId, initialState);
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case 'LWW_REGISTER':
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return new LWWRegister(this.nodeId, initialState);
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case 'OR_MAP':
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return new ORMap(this.nodeId, this.replicationGroup, initialState);
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case 'RGA':
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return new RGA(this.nodeId, initialState);
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default:
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throw new Error(`Unknown CRDT type: ${type}`);
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}
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}
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// Synchronize with peer nodes
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async synchronize(peerNodes = null) {
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const targets = peerNodes || Array.from(this.replicationGroup);
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for (const peer of targets) {
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if (peer !== this.nodeId) {
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await this.synchronizeWithPeer(peer);
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}
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}
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}
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async synchronizeWithPeer(peerNode) {
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// Get current state and deltas
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const localState = this.getCurrentState();
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const deltas = this.getDeltasSince(peerNode);
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// Send sync request
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const syncRequest = {
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type: 'CRDT_SYNC_REQUEST',
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sender: this.nodeId,
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vectorClock: this.vectorClock.clone(),
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state: localState,
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deltas: deltas
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};
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try {
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const response = await this.sendSyncRequest(peerNode, syncRequest);
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await this.processSyncResponse(response);
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} catch (error) {
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console.error(`Sync failed with ${peerNode}:`, error);
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}
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}
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}
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```
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### G-Counter Implementation
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```javascript
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class GCounter {
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constructor(nodeId, replicationGroup, initialState = null) {
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this.nodeId = nodeId;
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this.replicationGroup = replicationGroup;
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this.payload = new Map();
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// Initialize counters for all nodes
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for (const node of replicationGroup) {
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this.payload.set(node, 0);
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}
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if (initialState) {
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this.merge(initialState);
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}
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this.updateCallbacks = [];
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}
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// Increment operation (can only be performed by owner node)
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increment(amount = 1) {
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if (amount < 0) {
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throw new Error('G-Counter only supports positive increments');
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}
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const oldValue = this.payload.get(this.nodeId) || 0;
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const newValue = oldValue + amount;
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this.payload.set(this.nodeId, newValue);
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// Notify observers
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this.notifyUpdate({
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type: 'INCREMENT',
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node: this.nodeId,
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oldValue: oldValue,
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newValue: newValue,
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delta: amount
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});
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return newValue;
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}
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// Get current value (sum of all node counters)
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value() {
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return Array.from(this.payload.values()).reduce((sum, val) => sum + val, 0);
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}
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// Merge with another G-Counter state
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merge(otherState) {
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let changed = false;
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for (const [node, otherValue] of otherState.payload) {
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const currentValue = this.payload.get(node) || 0;
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if (otherValue > currentValue) {
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this.payload.set(node, otherValue);
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changed = true;
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}
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}
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if (changed) {
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this.notifyUpdate({
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type: 'MERGE',
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mergedFrom: otherState
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});
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}
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}
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// Compare with another state
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compare(otherState) {
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for (const [node, otherValue] of otherState.payload) {
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const currentValue = this.payload.get(node) || 0;
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if (currentValue < otherValue) {
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return 'LESS_THAN';
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} else if (currentValue > otherValue) {
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return 'GREATER_THAN';
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}
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}
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return 'EQUAL';
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}
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// Clone current state
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clone() {
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const newCounter = new GCounter(this.nodeId, this.replicationGroup);
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newCounter.payload = new Map(this.payload);
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return newCounter;
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}
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onUpdate(callback) {
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this.updateCallbacks.push(callback);
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}
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notifyUpdate(delta) {
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this.updateCallbacks.forEach(callback => callback(delta));
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}
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}
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```
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### OR-Set Implementation
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```javascript
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class ORSet {
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constructor(nodeId, initialState = null) {
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this.nodeId = nodeId;
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this.elements = new Map(); // element -> Set of unique tags
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this.tombstones = new Set(); // removed element tags
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this.tagCounter = 0;
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if (initialState) {
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this.merge(initialState);
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}
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this.updateCallbacks = [];
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}
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// Add element to set
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add(element) {
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const tag = this.generateUniqueTag();
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if (!this.elements.has(element)) {
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this.elements.set(element, new Set());
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}
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this.elements.get(element).add(tag);
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this.notifyUpdate({
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type: 'ADD',
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element: element,
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tag: tag
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});
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return tag;
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}
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// Remove element from set
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remove(element) {
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if (!this.elements.has(element)) {
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return false; // Element not present
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}
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const tags = this.elements.get(element);
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const removedTags = [];
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// Add all tags to tombstones
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for (const tag of tags) {
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this.tombstones.add(tag);
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removedTags.push(tag);
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}
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this.notifyUpdate({
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type: 'REMOVE',
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element: element,
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removedTags: removedTags
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});
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return true;
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}
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// Check if element is in set
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has(element) {
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if (!this.elements.has(element)) {
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return false;
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}
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const tags = this.elements.get(element);
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// Element is present if it has at least one non-tombstoned tag
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for (const tag of tags) {
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if (!this.tombstones.has(tag)) {
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return true;
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}
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}
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return false;
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}
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// Get all elements in set
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values() {
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const result = new Set();
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for (const [element, tags] of this.elements) {
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// Include element if it has at least one non-tombstoned tag
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for (const tag of tags) {
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if (!this.tombstones.has(tag)) {
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result.add(element);
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break;
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}
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}
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}
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return result;
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}
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// Merge with another OR-Set
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merge(otherState) {
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let changed = false;
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// Merge elements and their tags
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for (const [element, otherTags] of otherState.elements) {
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if (!this.elements.has(element)) {
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this.elements.set(element, new Set());
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}
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const currentTags = this.elements.get(element);
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for (const tag of otherTags) {
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if (!currentTags.has(tag)) {
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currentTags.add(tag);
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changed = true;
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}
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}
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}
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// Merge tombstones
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for (const tombstone of otherState.tombstones) {
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if (!this.tombstones.has(tombstone)) {
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this.tombstones.add(tombstone);
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changed = true;
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}
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}
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if (changed) {
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this.notifyUpdate({
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type: 'MERGE',
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mergedFrom: otherState
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});
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}
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}
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generateUniqueTag() {
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return `${this.nodeId}-${Date.now()}-${++this.tagCounter}`;
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}
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onUpdate(callback) {
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this.updateCallbacks.push(callback);
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}
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notifyUpdate(delta) {
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this.updateCallbacks.forEach(callback => callback(delta));
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}
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}
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```
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### LWW-Register Implementation
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```javascript
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class LWWRegister {
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constructor(nodeId, initialValue = null) {
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this.nodeId = nodeId;
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this.value = initialValue;
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this.timestamp = initialValue ? Date.now() : 0;
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this.vectorClock = new VectorClock(nodeId);
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this.updateCallbacks = [];
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}
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// Set new value with timestamp
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set(newValue, timestamp = null) {
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const ts = timestamp || Date.now();
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if (ts > this.timestamp ||
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(ts === this.timestamp && this.nodeId > this.getLastWriter())) {
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const oldValue = this.value;
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this.value = newValue;
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this.timestamp = ts;
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this.vectorClock.increment();
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this.notifyUpdate({
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type: 'SET',
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oldValue: oldValue,
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newValue: newValue,
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timestamp: ts
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});
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}
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}
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// Get current value
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get() {
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return this.value;
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}
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// Merge with another LWW-Register
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merge(otherRegister) {
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if (otherRegister.timestamp > this.timestamp ||
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(otherRegister.timestamp === this.timestamp &&
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otherRegister.nodeId > this.nodeId)) {
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const oldValue = this.value;
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this.value = otherRegister.value;
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this.timestamp = otherRegister.timestamp;
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this.notifyUpdate({
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type: 'MERGE',
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oldValue: oldValue,
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newValue: this.value,
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mergedFrom: otherRegister
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});
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}
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// Merge vector clocks
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this.vectorClock.merge(otherRegister.vectorClock);
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}
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getLastWriter() {
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// In real implementation, this would track the actual writer
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return this.nodeId;
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}
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onUpdate(callback) {
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this.updateCallbacks.push(callback);
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}
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notifyUpdate(delta) {
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this.updateCallbacks.forEach(callback => callback(delta));
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}
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}
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```
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### RGA (Replicated Growable Array) Implementation
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```javascript
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class RGA {
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constructor(nodeId, initialSequence = []) {
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this.nodeId = nodeId;
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this.sequence = [];
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this.tombstones = new Set();
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this.vertexCounter = 0;
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// Initialize with sequence
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for (const element of initialSequence) {
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this.insert(this.sequence.length, element);
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}
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this.updateCallbacks = [];
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}
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// Insert element at position
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insert(position, element) {
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const vertex = this.createVertex(element, position);
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// Find insertion point based on causal ordering
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const insertionIndex = this.findInsertionIndex(vertex, position);
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this.sequence.splice(insertionIndex, 0, vertex);
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this.notifyUpdate({
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type: 'INSERT',
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position: insertionIndex,
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element: element,
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vertex: vertex
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});
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||||
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return vertex.id;
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}
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||||
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||||
// Remove element at position
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remove(position) {
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if (position < 0 || position >= this.visibleLength()) {
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throw new Error('Position out of bounds');
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}
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||||
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const visibleVertex = this.getVisibleVertex(position);
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if (visibleVertex) {
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||||
this.tombstones.add(visibleVertex.id);
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this.notifyUpdate({
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type: 'REMOVE',
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||||
position: position,
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||||
vertex: visibleVertex
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||||
});
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||||
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||||
return true;
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||||
}
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||||
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return false;
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||||
}
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||||
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||||
// Get visible elements (non-tombstoned)
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||||
toArray() {
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||||
return this.sequence
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.filter(vertex => !this.tombstones.has(vertex.id))
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||||
.map(vertex => vertex.element);
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||||
}
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||||
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||||
// Get visible length
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||||
visibleLength() {
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||||
return this.sequence.filter(vertex => !this.tombstones.has(vertex.id)).length;
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||||
}
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||||
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||||
// Merge with another RGA
|
||||
merge(otherRGA) {
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||||
let changed = false;
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||||
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||||
// Merge sequences
|
||||
const mergedSequence = this.mergeSequences(this.sequence, otherRGA.sequence);
|
||||
if (mergedSequence.length !== this.sequence.length) {
|
||||
this.sequence = mergedSequence;
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||||
changed = true;
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||||
}
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||||
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||||
// Merge tombstones
|
||||
for (const tombstone of otherRGA.tombstones) {
|
||||
if (!this.tombstones.has(tombstone)) {
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||||
this.tombstones.add(tombstone);
|
||||
changed = true;
|
||||
}
|
||||
}
|
||||
|
||||
if (changed) {
|
||||
this.notifyUpdate({
|
||||
type: 'MERGE',
|
||||
mergedFrom: otherRGA
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
createVertex(element, position) {
|
||||
const leftVertex = position > 0 ? this.getVisibleVertex(position - 1) : null;
|
||||
|
||||
return {
|
||||
id: `${this.nodeId}-${++this.vertexCounter}`,
|
||||
element: element,
|
||||
leftOrigin: leftVertex ? leftVertex.id : null,
|
||||
timestamp: Date.now(),
|
||||
nodeId: this.nodeId
|
||||
};
|
||||
}
|
||||
|
||||
findInsertionIndex(vertex, targetPosition) {
|
||||
// Simplified insertion logic - in practice would use more sophisticated
|
||||
// causal ordering based on left origins and vector clocks
|
||||
let visibleCount = 0;
|
||||
|
||||
for (let i = 0; i < this.sequence.length; i++) {
|
||||
if (!this.tombstones.has(this.sequence[i].id)) {
|
||||
if (visibleCount === targetPosition) {
|
||||
return i;
|
||||
}
|
||||
visibleCount++;
|
||||
}
|
||||
}
|
||||
|
||||
return this.sequence.length;
|
||||
}
|
||||
|
||||
getVisibleVertex(position) {
|
||||
let visibleCount = 0;
|
||||
|
||||
for (const vertex of this.sequence) {
|
||||
if (!this.tombstones.has(vertex.id)) {
|
||||
if (visibleCount === position) {
|
||||
return vertex;
|
||||
}
|
||||
visibleCount++;
|
||||
}
|
||||
}
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
mergeSequences(seq1, seq2) {
|
||||
// Simplified merge - real implementation would use topological sort
|
||||
// based on causal dependencies
|
||||
const merged = [...seq1];
|
||||
|
||||
for (const vertex of seq2) {
|
||||
if (!merged.find(v => v.id === vertex.id)) {
|
||||
merged.push(vertex);
|
||||
}
|
||||
}
|
||||
|
||||
// Sort by timestamp for basic ordering
|
||||
return merged.sort((a, b) => a.timestamp - b.timestamp);
|
||||
}
|
||||
|
||||
onUpdate(callback) {
|
||||
this.updateCallbacks.push(callback);
|
||||
}
|
||||
|
||||
notifyUpdate(delta) {
|
||||
this.updateCallbacks.forEach(callback => callback(delta));
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### Delta-State CRDT Framework
|
||||
```javascript
|
||||
class DeltaStateCRDT {
|
||||
constructor(baseCRDT) {
|
||||
this.baseCRDT = baseCRDT;
|
||||
this.deltaBuffer = [];
|
||||
this.lastSyncVector = new Map();
|
||||
this.maxDeltaBuffer = 1000;
|
||||
}
|
||||
|
||||
// Apply operation and track delta
|
||||
applyOperation(operation) {
|
||||
const oldState = this.baseCRDT.clone();
|
||||
const result = this.baseCRDT.applyOperation(operation);
|
||||
const newState = this.baseCRDT.clone();
|
||||
|
||||
// Compute delta
|
||||
const delta = this.computeDelta(oldState, newState);
|
||||
this.addDelta(delta);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
// Add delta to buffer
|
||||
addDelta(delta) {
|
||||
this.deltaBuffer.push({
|
||||
delta: delta,
|
||||
timestamp: Date.now(),
|
||||
vectorClock: this.baseCRDT.vectorClock.clone()
|
||||
});
|
||||
|
||||
// Maintain buffer size
|
||||
if (this.deltaBuffer.length > this.maxDeltaBuffer) {
|
||||
this.deltaBuffer.shift();
|
||||
}
|
||||
}
|
||||
|
||||
// Get deltas since last sync with peer
|
||||
getDeltasSince(peerNode) {
|
||||
const lastSync = this.lastSyncVector.get(peerNode) || new VectorClock();
|
||||
|
||||
return this.deltaBuffer.filter(deltaEntry =>
|
||||
deltaEntry.vectorClock.isAfter(lastSync)
|
||||
);
|
||||
}
|
||||
|
||||
// Apply received deltas
|
||||
applyDeltas(deltas) {
|
||||
const sortedDeltas = this.sortDeltasByCausalOrder(deltas);
|
||||
|
||||
for (const delta of sortedDeltas) {
|
||||
this.baseCRDT.merge(delta.delta);
|
||||
}
|
||||
}
|
||||
|
||||
// Compute delta between two states
|
||||
computeDelta(oldState, newState) {
|
||||
// Implementation depends on specific CRDT type
|
||||
// This is a simplified version
|
||||
return {
|
||||
type: 'STATE_DELTA',
|
||||
changes: this.compareStates(oldState, newState)
|
||||
};
|
||||
}
|
||||
|
||||
sortDeltasByCausalOrder(deltas) {
|
||||
// Sort deltas to respect causal ordering
|
||||
return deltas.sort((a, b) => {
|
||||
if (a.vectorClock.isBefore(b.vectorClock)) return -1;
|
||||
if (b.vectorClock.isBefore(a.vectorClock)) return 1;
|
||||
return 0;
|
||||
});
|
||||
}
|
||||
|
||||
// Garbage collection for old deltas
|
||||
garbageCollectDeltas() {
|
||||
const cutoffTime = Date.now() - (24 * 60 * 60 * 1000); // 24 hours
|
||||
|
||||
this.deltaBuffer = this.deltaBuffer.filter(
|
||||
deltaEntry => deltaEntry.timestamp > cutoffTime
|
||||
);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
## MCP Integration Hooks
|
||||
|
||||
### Memory Coordination for CRDT State
|
||||
```javascript
|
||||
// Store CRDT state persistently
|
||||
await this.mcpTools.memory_usage({
|
||||
action: 'store',
|
||||
key: `crdt_state_${this.crdtName}`,
|
||||
value: JSON.stringify({
|
||||
type: this.crdtType,
|
||||
state: this.serializeState(),
|
||||
vectorClock: Array.from(this.vectorClock.entries()),
|
||||
lastSync: Array.from(this.lastSyncVector.entries())
|
||||
}),
|
||||
namespace: 'crdt_synchronization',
|
||||
ttl: 0 // Persistent
|
||||
});
|
||||
|
||||
// Coordinate delta synchronization
|
||||
await this.mcpTools.memory_usage({
|
||||
action: 'store',
|
||||
key: `deltas_${this.nodeId}_${Date.now()}`,
|
||||
value: JSON.stringify(this.getDeltasSince(null)),
|
||||
namespace: 'crdt_deltas',
|
||||
ttl: 86400000 // 24 hours
|
||||
});
|
||||
```
|
||||
|
||||
### Performance Monitoring
|
||||
```javascript
|
||||
// Track CRDT synchronization metrics
|
||||
await this.mcpTools.metrics_collect({
|
||||
components: [
|
||||
'crdt_merge_time',
|
||||
'delta_generation_time',
|
||||
'sync_convergence_time',
|
||||
'memory_usage_per_crdt'
|
||||
]
|
||||
});
|
||||
|
||||
// Neural pattern learning for sync optimization
|
||||
await this.mcpTools.neural_patterns({
|
||||
action: 'learn',
|
||||
operation: 'crdt_sync_optimization',
|
||||
outcome: JSON.stringify({
|
||||
syncPattern: this.lastSyncPattern,
|
||||
convergenceTime: this.lastConvergenceTime,
|
||||
networkTopology: this.networkState
|
||||
})
|
||||
});
|
||||
```
|
||||
|
||||
## Advanced CRDT Features
|
||||
|
||||
### Causal Consistency Tracker
|
||||
```javascript
|
||||
class CausalTracker {
|
||||
constructor(nodeId) {
|
||||
this.nodeId = nodeId;
|
||||
this.vectorClock = new VectorClock(nodeId);
|
||||
this.causalBuffer = new Map();
|
||||
this.deliveredEvents = new Set();
|
||||
}
|
||||
|
||||
// Track causal dependencies
|
||||
trackEvent(event) {
|
||||
event.vectorClock = this.vectorClock.clone();
|
||||
this.vectorClock.increment();
|
||||
|
||||
// Check if event can be delivered
|
||||
if (this.canDeliver(event)) {
|
||||
this.deliverEvent(event);
|
||||
this.checkBufferedEvents();
|
||||
} else {
|
||||
this.bufferEvent(event);
|
||||
}
|
||||
}
|
||||
|
||||
canDeliver(event) {
|
||||
// Event can be delivered if all its causal dependencies are satisfied
|
||||
for (const [nodeId, clock] of event.vectorClock.entries()) {
|
||||
if (nodeId === event.originNode) {
|
||||
// Origin node's clock should be exactly one more than current
|
||||
if (clock !== this.vectorClock.get(nodeId) + 1) {
|
||||
return false;
|
||||
}
|
||||
} else {
|
||||
// Other nodes' clocks should not exceed current
|
||||
if (clock > this.vectorClock.get(nodeId)) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
deliverEvent(event) {
|
||||
if (!this.deliveredEvents.has(event.id)) {
|
||||
// Update vector clock
|
||||
this.vectorClock.merge(event.vectorClock);
|
||||
|
||||
// Mark as delivered
|
||||
this.deliveredEvents.add(event.id);
|
||||
|
||||
// Apply event to CRDT
|
||||
this.applyCRDTOperation(event);
|
||||
}
|
||||
}
|
||||
|
||||
bufferEvent(event) {
|
||||
if (!this.causalBuffer.has(event.id)) {
|
||||
this.causalBuffer.set(event.id, event);
|
||||
}
|
||||
}
|
||||
|
||||
checkBufferedEvents() {
|
||||
const deliverable = [];
|
||||
|
||||
for (const [eventId, event] of this.causalBuffer) {
|
||||
if (this.canDeliver(event)) {
|
||||
deliverable.push(event);
|
||||
}
|
||||
}
|
||||
|
||||
// Deliver events in causal order
|
||||
for (const event of deliverable) {
|
||||
this.causalBuffer.delete(event.id);
|
||||
this.deliverEvent(event);
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### CRDT Composition Framework
|
||||
```javascript
|
||||
class CRDTComposer {
|
||||
constructor() {
|
||||
this.compositeTypes = new Map();
|
||||
this.transformations = new Map();
|
||||
}
|
||||
|
||||
// Define composite CRDT structure
|
||||
defineComposite(name, schema) {
|
||||
this.compositeTypes.set(name, {
|
||||
schema: schema,
|
||||
factory: (nodeId, replicationGroup) =>
|
||||
this.createComposite(schema, nodeId, replicationGroup)
|
||||
});
|
||||
}
|
||||
|
||||
createComposite(schema, nodeId, replicationGroup) {
|
||||
const composite = new CompositeCRDT(nodeId, replicationGroup);
|
||||
|
||||
for (const [fieldName, fieldSpec] of Object.entries(schema)) {
|
||||
const fieldCRDT = this.createFieldCRDT(fieldSpec, nodeId, replicationGroup);
|
||||
composite.addField(fieldName, fieldCRDT);
|
||||
}
|
||||
|
||||
return composite;
|
||||
}
|
||||
|
||||
createFieldCRDT(fieldSpec, nodeId, replicationGroup) {
|
||||
switch (fieldSpec.type) {
|
||||
case 'counter':
|
||||
return fieldSpec.decrements ?
|
||||
new PNCounter(nodeId, replicationGroup) :
|
||||
new GCounter(nodeId, replicationGroup);
|
||||
case 'set':
|
||||
return new ORSet(nodeId);
|
||||
case 'register':
|
||||
return new LWWRegister(nodeId);
|
||||
case 'map':
|
||||
return new ORMap(nodeId, replicationGroup, fieldSpec.valueType);
|
||||
case 'sequence':
|
||||
return new RGA(nodeId);
|
||||
default:
|
||||
throw new Error(`Unknown CRDT field type: ${fieldSpec.type}`);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
class CompositeCRDT {
|
||||
constructor(nodeId, replicationGroup) {
|
||||
this.nodeId = nodeId;
|
||||
this.replicationGroup = replicationGroup;
|
||||
this.fields = new Map();
|
||||
this.updateCallbacks = [];
|
||||
}
|
||||
|
||||
addField(name, crdt) {
|
||||
this.fields.set(name, crdt);
|
||||
|
||||
// Subscribe to field updates
|
||||
crdt.onUpdate((delta) => {
|
||||
this.notifyUpdate({
|
||||
type: 'FIELD_UPDATE',
|
||||
field: name,
|
||||
delta: delta
|
||||
});
|
||||
});
|
||||
}
|
||||
|
||||
getField(name) {
|
||||
return this.fields.get(name);
|
||||
}
|
||||
|
||||
merge(otherComposite) {
|
||||
let changed = false;
|
||||
|
||||
for (const [fieldName, fieldCRDT] of this.fields) {
|
||||
const otherField = otherComposite.fields.get(fieldName);
|
||||
if (otherField) {
|
||||
const oldState = fieldCRDT.clone();
|
||||
fieldCRDT.merge(otherField);
|
||||
|
||||
if (!this.statesEqual(oldState, fieldCRDT)) {
|
||||
changed = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (changed) {
|
||||
this.notifyUpdate({
|
||||
type: 'COMPOSITE_MERGE',
|
||||
mergedFrom: otherComposite
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
serialize() {
|
||||
const serialized = {};
|
||||
|
||||
for (const [fieldName, fieldCRDT] of this.fields) {
|
||||
serialized[fieldName] = fieldCRDT.serialize();
|
||||
}
|
||||
|
||||
return serialized;
|
||||
}
|
||||
|
||||
onUpdate(callback) {
|
||||
this.updateCallbacks.push(callback);
|
||||
}
|
||||
|
||||
notifyUpdate(delta) {
|
||||
this.updateCallbacks.forEach(callback => callback(delta));
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
## Integration with Consensus Protocols
|
||||
|
||||
### CRDT-Enhanced Consensus
|
||||
```javascript
|
||||
class CRDTConsensusIntegrator {
|
||||
constructor(consensusProtocol, crdtSynchronizer) {
|
||||
this.consensus = consensusProtocol;
|
||||
this.crdt = crdtSynchronizer;
|
||||
this.hybridOperations = new Map();
|
||||
}
|
||||
|
||||
// Hybrid operation: consensus for ordering, CRDT for state
|
||||
async hybridUpdate(operation) {
|
||||
// Step 1: Achieve consensus on operation ordering
|
||||
const consensusResult = await this.consensus.propose({
|
||||
type: 'CRDT_OPERATION',
|
||||
operation: operation,
|
||||
timestamp: Date.now()
|
||||
});
|
||||
|
||||
if (consensusResult.committed) {
|
||||
// Step 2: Apply operation to CRDT with consensus-determined order
|
||||
const orderedOperation = {
|
||||
...operation,
|
||||
consensusIndex: consensusResult.index,
|
||||
globalTimestamp: consensusResult.timestamp
|
||||
};
|
||||
|
||||
await this.crdt.applyOrderedOperation(orderedOperation);
|
||||
|
||||
return {
|
||||
success: true,
|
||||
consensusIndex: consensusResult.index,
|
||||
crdtState: this.crdt.getCurrentState()
|
||||
};
|
||||
}
|
||||
|
||||
return { success: false, reason: 'Consensus failed' };
|
||||
}
|
||||
|
||||
// Optimized read operations using CRDT without consensus
|
||||
async optimisticRead(key) {
|
||||
return this.crdt.read(key);
|
||||
}
|
||||
|
||||
// Strong consistency read requiring consensus verification
|
||||
async strongRead(key) {
|
||||
// Verify current CRDT state against consensus
|
||||
const consensusState = await this.consensus.getCommittedState();
|
||||
const crdtState = this.crdt.getCurrentState();
|
||||
|
||||
if (this.statesConsistent(consensusState, crdtState)) {
|
||||
return this.crdt.read(key);
|
||||
} else {
|
||||
// Reconcile states before read
|
||||
await this.reconcileStates(consensusState, crdtState);
|
||||
return this.crdt.read(key);
|
||||
}
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
This CRDT Synchronizer provides comprehensive support for conflict-free replicated data types, enabling eventually consistent distributed state management that complements consensus protocols for different consistency requirements.
|
||||
Reference in New Issue
Block a user