1209 lines
37 KiB
Go
1209 lines
37 KiB
Go
/*
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* Copyright 2026 Safronov Grigorii
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*
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* Licensed under the CDDL, Version 1.0 (the "License");
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* you may not use this file except in compliance with the License.
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*
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* You may obtain a copy of the License at
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* https://opensource.org/licenses/CDDL-1.0
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*/
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// Файл: internal/cluster/node.go
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// Назначение: Реализация узла кластера (node) для распределённой СУБД с поддержкой временных меток.
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package cluster
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import (
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"crypto/rand"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"io"
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"net"
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"runtime/debug"
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"sync"
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"sync/atomic"
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"time"
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"futriis/internal/log"
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"futriis/internal/storage"
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"github.com/google/uuid"
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)
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// =============================================================================
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// NETWORK REPLICATOR - ЗАГЛУШКА
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// =============================================================================
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type NetworkReplicator struct{}
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func NewNetworkReplicator(config *ReplicationRetryConfig, workerPool *WorkerPool, logger *log.Logger) *NetworkReplicator {
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return &NetworkReplicator{}
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}
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type ReplicationRetryConfig struct {
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MaxRetries int
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InitialBackoff time.Duration
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MaxBackoff time.Duration
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BackoffFactor float64
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JitterEnabled bool
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}
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func DefaultReplicationRetryConfig() *ReplicationRetryConfig {
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return &ReplicationRetryConfig{
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MaxRetries: 5,
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InitialBackoff: 100 * time.Millisecond,
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MaxBackoff: 10 * time.Second,
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BackoffFactor: 2.0,
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JitterEnabled: true,
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}
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}
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func (nr *NetworkReplicator) Close() error {
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return nil
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}
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func (nr *NetworkReplicator) GetStats() map[string]interface{} {
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return map[string]interface{}{
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"enabled": false,
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"message": "NetworkReplicator is a stub - full implementation pending",
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}
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}
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func (nr *NetworkReplicator) Replicate(targetNodeID, targetAddress string, data []byte) error {
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return nil
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}
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// =============================================================================
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// ОСНОВНЫЕ ТИПЫ
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// =============================================================================
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// LoggerInterface определяет интерфейс для логирования
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type LoggerInterface interface {
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Debug(msg string)
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Info(msg string)
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Warn(msg string)
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Error(msg string)
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Debugf(format string, args ...interface{})
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Infof(format string, args ...interface{})
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Warnf(format string, args ...interface{})
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Errorf(format string, args ...interface{})
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}
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// NodeStatus представляет состояние узла кластера
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type NodeStatus int32
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const (
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StatusOffline NodeStatus = iota
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StatusActive
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StatusSyncing
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StatusFailed
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)
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// NodeRequest представляет запрос между узлами
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type NodeRequest struct {
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Type string `json:"type"`
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FromNode string `json:"from_node"`
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Data json.RawMessage `json:"data"`
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Timestamp int64 `json:"timestamp"`
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}
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// NodeInfo представляет информацию об узле в кластере
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type NodeInfo struct {
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ID string `json:"id"`
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IP string `json:"ip"`
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Port int `json:"port"`
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Status string `json:"status"`
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LastSeen int64 `json:"last_seen"`
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JoinedAt int64 `json:"joined_at"`
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UpdatedAt int64 `json:"updated_at"`
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Version int `json:"version"`
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}
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// ShardInfo представляет информацию о шарде
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type ShardInfo struct {
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ID string `json:"id"`
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Name string `json:"name"`
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Nodes []string `json:"nodes"`
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LeaderNode string `json:"leader_node"`
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Status string `json:"status"`
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CreatedAt int64 `json:"created_at"`
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UpdatedAt int64 `json:"updated_at"`
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LastRebalanced int64 `json:"last_rebalanced"`
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DocumentCount int64 `json:"document_count"`
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SizeBytes int64 `json:"size_bytes"`
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}
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// =============================================================================
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// ВСПОМОГАТЕЛЬНЫЕ ФУНКЦИИ
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// =============================================================================
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func SafeGoWithLogger(fn func(), logger *log.Logger, name string) {
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go func() {
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defer func() {
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if r := recover(); r != nil {
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if logger != nil {
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logger.Error(fmt.Sprintf("Goroutine %s panicked: %v\n%s", name, r, debug.Stack()))
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}
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time.Sleep(5 * time.Second)
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SafeGoWithLogger(fn, logger, name)
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}
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}()
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fn()
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}()
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}
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// =============================================================================
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// NODE - ОСНОВНАЯ СТРУКТУРА УЗЛА
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// =============================================================================
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type Node struct {
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ID string
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IP string
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Port int
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Status atomic.Int32
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Storage *storage.Storage
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logger *log.Logger
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coordinator *RaftCoordinator
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lastSeen atomic.Int64
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joinedAt atomic.Int64
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createdAt int64
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startedAt int64
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stoppedAt int64
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incomingConn chan net.Conn
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stopChan chan struct{}
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requestCount atomic.Uint64
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bytesRx atomic.Uint64
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bytesTx atomic.Uint64
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mu sync.RWMutex
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workerPool *WorkerPool
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replicator *NetworkReplicator
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connPool sync.Map
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panicRecoveryMgr *PanicRecoveryManager
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recoverableRoutines map[string]*RecoverableRoutine
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routinesMu sync.RWMutex
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}
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type NodeConfig struct {
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IP string
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Port int
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Storage *storage.Storage
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Logger *log.Logger
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Coordinator *RaftCoordinator
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PanicRecoveryMgr *PanicRecoveryManager
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}
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// =============================================================================
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// СОЗДАНИЕ УЗЛА
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// =============================================================================
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func NewNode(ip string, port int, store *storage.Storage, logger *log.Logger) *Node {
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return NewNodeWithRecovery(ip, port, store, logger, nil)
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}
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func NewNodeWithRecovery(ip string, port int, store *storage.Storage, logger *log.Logger, panicRecoveryMgr *PanicRecoveryManager) *Node {
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now := time.Now().UnixMilli()
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workerPool := NewWorkerPool(500, logger)
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replicator := NewNetworkReplicator(DefaultReplicationRetryConfig(), workerPool, logger)
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node := &Node{
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ID: uuid.New().String(),
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IP: ip,
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Port: port,
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Storage: store,
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logger: logger,
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incomingConn: make(chan net.Conn, 10000),
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stopChan: make(chan struct{}),
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createdAt: now,
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startedAt: now,
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workerPool: workerPool,
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replicator: replicator,
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panicRecoveryMgr: panicRecoveryMgr,
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recoverableRoutines: make(map[string]*RecoverableRoutine),
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}
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node.Status.Store(int32(StatusActive))
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node.lastSeen.Store(now)
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node.joinedAt.Store(0)
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if panicRecoveryMgr != nil {
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node.startRecoverableRoutine("TCPServer", node.startTCPServer)
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node.startRecoverableRoutine("IncomingConnections", node.handleIncomingConnections)
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node.startRecoverableRoutine("HeartbeatLoop", node.heartbeatLoop)
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node.startRecoverableRoutine("ConnectionHealthMonitor", node.connectionHealthMonitor)
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logger.Info(fmt.Sprintf("Node %s created with panic recovery (max workers: 500)", node.ID))
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} else {
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SafeGoWithLogger(node.startTCPServer, logger, "TCPServer")
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SafeGoWithLogger(node.handleIncomingConnections, logger, "IncomingConnections")
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SafeGoWithLogger(node.heartbeatLoop, logger, "HeartbeatLoop")
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SafeGoWithLogger(node.connectionHealthMonitor, logger, "ConnectionHealthMonitor")
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logger.Info(fmt.Sprintf("Node %s created at %s with lock-free worker pool (max: 500)", node.ID, node.GetCreatedAtStr()))
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}
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return node
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}
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// =============================================================================
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// ВОССТАНАВЛИВАЕМЫЕ ГОРУТИНЫ
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// =============================================================================
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func (n *Node) startRecoverableRoutine(name string, fn func()) {
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if n.panicRecoveryMgr == nil {
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SafeGoWithLogger(fn, n.logger, name)
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return
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}
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n.routinesMu.Lock()
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defer n.routinesMu.Unlock()
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routine := NewRecoverableRoutine(name, func() error {
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fn()
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return nil
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}, n.panicRecoveryMgr, 10)
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n.recoverableRoutines[name] = routine
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routine.Start()
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if n.logger != nil {
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n.logger.Debug(fmt.Sprintf("Started recoverable routine: %s", name))
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}
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}
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func (n *Node) stopRecoverableRoutine(name string) {
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n.routinesMu.RLock()
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routine, ok := n.recoverableRoutines[name]
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n.routinesMu.RUnlock()
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if ok && routine != nil {
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routine.Stop()
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if n.logger != nil {
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n.logger.Debug(fmt.Sprintf("Stopped recoverable routine: %s", name))
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}
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}
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}
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// =============================================================================
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// TCP СЕРВЕР
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// =============================================================================
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func (n *Node) startTCPServer() {
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defer func() {
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if r := recover(); r != nil {
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if n.logger != nil {
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n.logger.Error(fmt.Sprintf("TCP server panicked: %v\n%s", r, debug.Stack()))
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}
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time.Sleep(5 * time.Second)
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if n.panicRecoveryMgr != nil {
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n.startRecoverableRoutine("TCPServer", n.startTCPServer)
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} else {
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SafeGoWithLogger(n.startTCPServer, n.logger, "TCPServer")
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}
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}
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}()
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addr := fmt.Sprintf("%s:%d", n.IP, n.Port)
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listener, err := net.Listen("tcp", addr)
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if err != nil {
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if n.logger != nil {
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n.logger.Error(fmt.Sprintf("Node %s failed to start TCP server: %v", n.ID, err))
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}
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n.Status.Store(int32(StatusFailed))
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return
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}
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defer listener.Close()
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if n.logger != nil {
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n.logger.Info(fmt.Sprintf("Node %s listening on %s (started at %s)", n.ID, addr, n.GetStartedAtStr()))
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}
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for {
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select {
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case <-n.stopChan:
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if n.logger != nil {
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n.logger.Info(fmt.Sprintf("Node %s TCP server stopped", n.ID))
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}
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return
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default:
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if err := listener.(*net.TCPListener).SetDeadline(time.Now().Add(5 * time.Second)); err != nil {
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continue
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}
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conn, err := listener.Accept()
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if err != nil {
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if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
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||
continue
|
||
}
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||
if n.logger != nil {
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n.logger.Error(fmt.Sprintf("Node %s accept error: %v", n.ID, err))
|
||
}
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continue
|
||
}
|
||
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conn.SetReadDeadline(time.Now().Add(30 * time.Second))
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conn.SetWriteDeadline(time.Now().Add(30 * time.Second))
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select {
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case n.incomingConn <- conn:
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n.bytesRx.Add(1)
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default:
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if n.logger != nil {
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n.logger.Warn(fmt.Sprintf("Node %s incoming connection queue full, dropping connection", n.ID))
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||
}
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conn.Close()
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}
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}
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}
|
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}
|
||
|
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// =============================================================================
|
||
// ОБРАБОТКА ВХОДЯЩИХ СОЕДИНЕНИЙ
|
||
// =============================================================================
|
||
|
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func (n *Node) handleIncomingConnections() {
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||
defer func() {
|
||
if r := recover(); r != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Incoming connections handler panicked: %v\n%s", r, debug.Stack()))
|
||
}
|
||
time.Sleep(5 * time.Second)
|
||
if n.panicRecoveryMgr != nil {
|
||
n.startRecoverableRoutine("IncomingConnections", n.handleIncomingConnections)
|
||
} else {
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||
SafeGoWithLogger(n.handleIncomingConnections, n.logger, "IncomingConnections")
|
||
}
|
||
}
|
||
}()
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||
|
||
for {
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||
select {
|
||
case <-n.stopChan:
|
||
return
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||
case conn := <-n.incomingConn:
|
||
n.requestCount.Add(1)
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taskID := fmt.Sprintf("handle_conn_%d_%s", time.Now().UnixNano(), conn.RemoteAddr().String())
|
||
err := n.workerPool.SubmitFunc(taskID, func() error {
|
||
n.handleNodeRequest(conn)
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return nil
|
||
})
|
||
if err != nil {
|
||
if n.logger != nil {
|
||
n.logger.Warn(fmt.Sprintf("Failed to submit connection task: %v", err))
|
||
}
|
||
conn.Close()
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// =============================================================================
|
||
// ОБРАБОТКА ЗАПРОСОВ
|
||
// =============================================================================
|
||
|
||
func (n *Node) handleNodeRequest(conn net.Conn) {
|
||
defer func() {
|
||
if r := recover(); r != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Request handler panicked: %v\n%s", r, debug.Stack()))
|
||
}
|
||
}
|
||
conn.Close()
|
||
}()
|
||
|
||
conn.SetReadDeadline(time.Now().Add(30 * time.Second))
|
||
|
||
decoder := json.NewDecoder(conn)
|
||
var req NodeRequest
|
||
if err := decoder.Decode(&req); err != nil {
|
||
if err != io.EOF && n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Node %s failed to decode request: %v", n.ID, err))
|
||
}
|
||
return
|
||
}
|
||
|
||
n.lastSeen.Store(time.Now().UnixMilli())
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||
|
||
if n.logger != nil {
|
||
n.logger.Debug(fmt.Sprintf("Node %s received request type %s from %s at %s",
|
||
n.ID, req.Type, req.FromNode, time.UnixMilli(req.Timestamp).Format("15:04:05.000")))
|
||
}
|
||
|
||
switch req.Type {
|
||
case "replicate":
|
||
n.handleReplicateRequest(req.Data)
|
||
case "query":
|
||
n.handleQueryRequest(req.Data, conn)
|
||
case "sync":
|
||
n.handleSyncRequest(req.Data, conn)
|
||
case "heartbeat":
|
||
n.handleHeartbeatRequest(req, conn)
|
||
case "status_sync":
|
||
n.handleStatusSyncRequest(req, conn)
|
||
default:
|
||
if n.logger != nil {
|
||
n.logger.Warn(fmt.Sprintf("Node %s unknown request type: %s", n.ID, req.Type))
|
||
}
|
||
}
|
||
}
|
||
|
||
func (n *Node) handleReplicateRequest(data []byte) {
|
||
defer func() {
|
||
if r := recover(); r != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Replicate request handler panicked: %v\n%s", r, debug.Stack()))
|
||
}
|
||
}
|
||
}()
|
||
|
||
startTime := time.Now().UnixMilli()
|
||
|
||
var repData struct {
|
||
Database string `json:"database"`
|
||
Collection string `json:"collection"`
|
||
Document map[string]interface{} `json:"document"`
|
||
SourceNode string `json:"source_node"`
|
||
ReplicaID string `json:"replica_id"`
|
||
}
|
||
|
||
if err := json.Unmarshal(data, &repData); err != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Node %s failed to unmarshal replicate data: %v", n.ID, err))
|
||
}
|
||
return
|
||
}
|
||
|
||
db, err := n.Storage.GetDatabase(repData.Database)
|
||
if err != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Node %s database not found for replication: %s", n.ID, repData.Database))
|
||
}
|
||
return
|
||
}
|
||
|
||
coll, err := db.GetCollection(repData.Collection)
|
||
if err != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Node %s collection not found for replication: %s", n.ID, repData.Collection))
|
||
}
|
||
return
|
||
}
|
||
|
||
docID, ok := repData.Document["_id"].(string)
|
||
if !ok {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Node %s document missing _id field", n.ID))
|
||
}
|
||
return
|
||
}
|
||
|
||
doc := storage.NewDocumentWithID(docID)
|
||
for k, v := range repData.Document {
|
||
doc.SetField(k, v)
|
||
}
|
||
|
||
if err := coll.Insert(doc); err != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Node %s failed to replicate document: %v", n.ID, err))
|
||
}
|
||
} else {
|
||
duration := time.Now().UnixMilli() - startTime
|
||
if n.logger != nil {
|
||
n.logger.Debug(fmt.Sprintf("Node %s replicated document %s from %s (took %d ms)",
|
||
n.ID, doc.ID, repData.SourceNode, duration))
|
||
}
|
||
}
|
||
}
|
||
|
||
func (n *Node) handleQueryRequest(data []byte, conn net.Conn) {
|
||
defer func() {
|
||
if r := recover(); r != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Query request handler panicked: %v\n%s", r, debug.Stack()))
|
||
}
|
||
n.sendErrorResponse(conn, "Internal server error")
|
||
}
|
||
}()
|
||
|
||
startTime := time.Now().UnixMilli()
|
||
|
||
var queryData struct {
|
||
Database string `json:"database"`
|
||
Collection string `json:"collection"`
|
||
DocumentID string `json:"document_id"`
|
||
RequestID string `json:"request_id"`
|
||
}
|
||
|
||
if err := json.Unmarshal(data, &queryData); err != nil {
|
||
n.sendErrorResponse(conn, err.Error())
|
||
return
|
||
}
|
||
|
||
db, err := n.Storage.GetDatabase(queryData.Database)
|
||
if err != nil {
|
||
n.sendErrorResponse(conn, err.Error())
|
||
return
|
||
}
|
||
|
||
coll, err := db.GetCollection(queryData.Collection)
|
||
if err != nil {
|
||
n.sendErrorResponse(conn, err.Error())
|
||
return
|
||
}
|
||
|
||
doc, err := coll.Find(queryData.DocumentID)
|
||
if err != nil {
|
||
n.sendErrorResponse(conn, err.Error())
|
||
return
|
||
}
|
||
|
||
duration := time.Now().UnixMilli() - startTime
|
||
|
||
response := map[string]interface{}{
|
||
"status": "success",
|
||
"data": doc,
|
||
"node_id": n.ID,
|
||
"request_id": queryData.RequestID,
|
||
"duration_ms": duration,
|
||
"timestamp": time.Now().UnixMilli(),
|
||
}
|
||
|
||
conn.SetWriteDeadline(time.Now().Add(10 * time.Second))
|
||
encoder := json.NewEncoder(conn)
|
||
if err := encoder.Encode(response); err == nil {
|
||
responseData, _ := json.Marshal(response)
|
||
n.bytesTx.Add(uint64(len(responseData)))
|
||
}
|
||
|
||
if n.logger != nil {
|
||
n.logger.Debug(fmt.Sprintf("Node %s handled query for %s.%s:%s (took %d ms)",
|
||
n.ID, queryData.Database, queryData.Collection, queryData.DocumentID, duration))
|
||
}
|
||
}
|
||
|
||
func (n *Node) handleSyncRequest(data []byte, conn net.Conn) {
|
||
defer func() {
|
||
if r := recover(); r != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Sync request handler panicked: %v\n%s", r, debug.Stack()))
|
||
}
|
||
n.sendErrorResponse(conn, "Internal server error")
|
||
}
|
||
}()
|
||
|
||
startTime := time.Now().UnixMilli()
|
||
|
||
var syncData struct {
|
||
Database string `json:"database"`
|
||
Collection string `json:"collection"`
|
||
RequestID string `json:"request_id"`
|
||
Since int64 `json:"since"`
|
||
}
|
||
|
||
if err := json.Unmarshal(data, &syncData); err != nil {
|
||
n.sendErrorResponse(conn, err.Error())
|
||
return
|
||
}
|
||
|
||
db, err := n.Storage.GetDatabase(syncData.Database)
|
||
if err != nil {
|
||
n.sendErrorResponse(conn, err.Error())
|
||
return
|
||
}
|
||
|
||
coll, err := db.GetCollection(syncData.Collection)
|
||
if err != nil {
|
||
n.sendErrorResponse(conn, err.Error())
|
||
return
|
||
}
|
||
|
||
docs := coll.GetAllDocuments()
|
||
|
||
if syncData.Since > 0 {
|
||
filtered := make([]*storage.Document, 0)
|
||
for _, doc := range docs {
|
||
if doc.UpdatedAt > syncData.Since {
|
||
filtered = append(filtered, doc)
|
||
}
|
||
}
|
||
docs = filtered
|
||
}
|
||
|
||
duration := time.Now().UnixMilli() - startTime
|
||
|
||
response := map[string]interface{}{
|
||
"status": "success",
|
||
"docs": docs,
|
||
"count": len(docs),
|
||
"node_id": n.ID,
|
||
"request_id": syncData.RequestID,
|
||
"duration_ms": duration,
|
||
"timestamp": time.Now().UnixMilli(),
|
||
"sync_duration_ms": duration,
|
||
}
|
||
|
||
conn.SetWriteDeadline(time.Now().Add(30 * time.Second))
|
||
encoder := json.NewEncoder(conn)
|
||
if err := encoder.Encode(response); err != nil && n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Failed to send sync response: %v", err))
|
||
}
|
||
|
||
if n.logger != nil {
|
||
n.logger.Info(fmt.Sprintf("Node %s synced %d documents from %s.%s (took %d ms)",
|
||
n.ID, len(docs), syncData.Database, syncData.Collection, duration))
|
||
}
|
||
}
|
||
|
||
func (n *Node) handleHeartbeatRequest(req NodeRequest, conn net.Conn) {
|
||
defer func() {
|
||
if r := recover(); r != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Heartbeat handler panicked: %v\n%s", r, debug.Stack()))
|
||
}
|
||
}
|
||
}()
|
||
|
||
n.lastSeen.Store(time.Now().UnixMilli())
|
||
|
||
response := map[string]interface{}{
|
||
"status": "alive",
|
||
"node_id": n.ID,
|
||
"timestamp": time.Now().UnixMilli(),
|
||
"uptime_ms": time.Now().UnixMilli() - n.startedAt,
|
||
}
|
||
|
||
conn.SetWriteDeadline(time.Now().Add(5 * time.Second))
|
||
encoder := json.NewEncoder(conn)
|
||
encoder.Encode(response)
|
||
}
|
||
|
||
func (n *Node) handleStatusSyncRequest(req NodeRequest, conn net.Conn) {
|
||
defer func() {
|
||
if r := recover(); r != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Status sync handler panicked: %v\n%s", r, debug.Stack()))
|
||
}
|
||
n.sendErrorResponse(conn, "Internal server error")
|
||
}
|
||
}()
|
||
|
||
var syncStatus struct {
|
||
LeaderID string `json:"leader_id"`
|
||
Term uint64 `json:"term"`
|
||
ClusterSize int `json:"cluster_size"`
|
||
}
|
||
|
||
if err := json.Unmarshal(req.Data, &syncStatus); err != nil {
|
||
n.sendErrorResponse(conn, err.Error())
|
||
return
|
||
}
|
||
|
||
if n.coordinator != nil {
|
||
n.coordinator.HandleStatusSync(syncStatus.LeaderID, syncStatus.Term, syncStatus.ClusterSize)
|
||
}
|
||
|
||
response := map[string]interface{}{
|
||
"status": "synced",
|
||
"node_id": n.ID,
|
||
"term": n.coordinator.GetCurrentTerm(),
|
||
"is_leader": n.coordinator.IsLeader(),
|
||
"timestamp": time.Now().UnixMilli(),
|
||
}
|
||
|
||
conn.SetWriteDeadline(time.Now().Add(10 * time.Second))
|
||
encoder := json.NewEncoder(conn)
|
||
encoder.Encode(response)
|
||
}
|
||
|
||
func (n *Node) sendErrorResponse(conn net.Conn, errMsg string) {
|
||
response := map[string]interface{}{
|
||
"status": "error",
|
||
"error": errMsg,
|
||
"node_id": n.ID,
|
||
"timestamp": time.Now().UnixMilli(),
|
||
}
|
||
|
||
conn.SetWriteDeadline(time.Now().Add(5 * time.Second))
|
||
encoder := json.NewEncoder(conn)
|
||
encoder.Encode(response)
|
||
}
|
||
|
||
// =============================================================================
|
||
// HEARTBEAT И МОНИТОРИНГ
|
||
// =============================================================================
|
||
|
||
func (n *Node) heartbeatLoop() {
|
||
defer func() {
|
||
if r := recover(); r != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Heartbeat loop panicked: %v\n%s", r, debug.Stack()))
|
||
}
|
||
time.Sleep(5 * time.Second)
|
||
if n.panicRecoveryMgr != nil {
|
||
n.startRecoverableRoutine("HeartbeatLoop", n.heartbeatLoop)
|
||
} else {
|
||
SafeGoWithLogger(n.heartbeatLoop, n.logger, "HeartbeatLoop")
|
||
}
|
||
}
|
||
}()
|
||
|
||
ticker := time.NewTicker(5 * time.Second)
|
||
defer ticker.Stop()
|
||
|
||
for {
|
||
select {
|
||
case <-n.stopChan:
|
||
return
|
||
case <-ticker.C:
|
||
if n.coordinator != nil {
|
||
n.coordinator.SendHeartbeat(n.ID)
|
||
n.lastSeen.Store(time.Now().UnixMilli())
|
||
if n.logger != nil {
|
||
n.logger.Debug(fmt.Sprintf("Node %s sent heartbeat at %s", n.ID, n.GetLastSeenStr()))
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
func (n *Node) connectionHealthMonitor() {
|
||
defer func() {
|
||
if r := recover(); r != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Connection health monitor panicked: %v\n%s", r, debug.Stack()))
|
||
}
|
||
SafeGoWithLogger(n.connectionHealthMonitor, n.logger, "ConnectionHealthMonitor")
|
||
}
|
||
}()
|
||
|
||
ticker := time.NewTicker(30 * time.Second)
|
||
defer ticker.Stop()
|
||
|
||
for {
|
||
select {
|
||
case <-n.stopChan:
|
||
return
|
||
case <-ticker.C:
|
||
n.cleanupStaleConnections()
|
||
}
|
||
}
|
||
}
|
||
|
||
func (n *Node) cleanupStaleConnections() {
|
||
defer func() {
|
||
if r := recover(); r != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Cleanup connections panicked: %v", r))
|
||
}
|
||
}
|
||
}()
|
||
|
||
n.connPool.Range(func(key, value interface{}) bool {
|
||
if conn, ok := value.(net.Conn); ok {
|
||
conn.SetReadDeadline(time.Now().Add(1 * time.Second))
|
||
buf := make([]byte, 1)
|
||
_, err := conn.Read(buf)
|
||
if err != nil {
|
||
conn.Close()
|
||
n.connPool.Delete(key)
|
||
if n.logger != nil {
|
||
n.logger.Debug(fmt.Sprintf("Cleaned up stale connection for %v", key))
|
||
}
|
||
}
|
||
}
|
||
return true
|
||
})
|
||
}
|
||
|
||
// =============================================================================
|
||
// УПРАВЛЕНИЕ СТАТУСОМ УЗЛА
|
||
// =============================================================================
|
||
|
||
func (n *Node) GetNodeStatus() NodeStatus {
|
||
return NodeStatus(n.Status.Load())
|
||
}
|
||
|
||
func (n *Node) IsActive() bool {
|
||
return NodeStatus(n.Status.Load()) == StatusActive
|
||
}
|
||
|
||
func (n *Node) SetStatus(status NodeStatus) error {
|
||
n.mu.Lock()
|
||
defer n.mu.Unlock()
|
||
|
||
oldStatus := n.Status.Load()
|
||
if oldStatus == int32(status) {
|
||
return nil
|
||
}
|
||
|
||
if n.coordinator != nil && n.coordinator.IsLeader() {
|
||
if err := n.coordinator.UpdateNodeStatus(n.ID, status); err != nil {
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Failed to update node status via Raft: %v", err))
|
||
}
|
||
return err
|
||
}
|
||
}
|
||
|
||
n.Status.Store(int32(status))
|
||
|
||
if n.logger != nil {
|
||
n.logger.Info(fmt.Sprintf("Node %s status changed from %d to %d at %s",
|
||
n.ID, oldStatus, status, time.Now().Format("2006-01-02 15:04:05.000")))
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// =============================================================================
|
||
// УПРАВЛЕНИЕ КЛАСТЕРОМ
|
||
// =============================================================================
|
||
|
||
func (n *Node) SetCoordinator(coord *RaftCoordinator) {
|
||
n.coordinator = coord
|
||
now := time.Now().UnixMilli()
|
||
n.joinedAt.Store(now)
|
||
|
||
if n.logger != nil {
|
||
n.logger.Info(fmt.Sprintf("Node %s joined cluster at %s", n.ID, n.GetJoinedAtStr()))
|
||
}
|
||
}
|
||
|
||
func (n *Node) JoinCluster(coord *RaftCoordinator) error {
|
||
if n.coordinator != nil {
|
||
return fmt.Errorf("node already joined to cluster")
|
||
}
|
||
|
||
n.SetCoordinator(coord)
|
||
|
||
if err := coord.RegisterNode(n); err != nil {
|
||
return fmt.Errorf("failed to register node: %v", err)
|
||
}
|
||
|
||
if err := n.SetStatus(StatusActive); err != nil {
|
||
return fmt.Errorf("failed to set active status: %v", err)
|
||
}
|
||
|
||
if n.logger != nil {
|
||
n.logger.Info(fmt.Sprintf("Node %s successfully joined cluster at %s", n.ID, n.GetJoinedAtStr()))
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
func (n *Node) LeaveCluster() error {
|
||
if n.coordinator == nil {
|
||
return fmt.Errorf("node not in cluster")
|
||
}
|
||
|
||
if err := n.SetStatus(StatusOffline); err != nil {
|
||
n.logger.Warn(fmt.Sprintf("Failed to set offline status: %v", err))
|
||
}
|
||
|
||
if err := n.coordinator.RemoveNode(n.ID); err != nil {
|
||
n.logger.Warn(fmt.Sprintf("Failed to remove node from coordinator: %v", err))
|
||
}
|
||
|
||
n.coordinator = nil
|
||
n.joinedAt.Store(0)
|
||
|
||
if n.logger != nil {
|
||
n.logger.Info(fmt.Sprintf("Node %s left cluster at %s", n.ID, time.Now().Format("2006-01-02 15:04:05.000")))
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// =============================================================================
|
||
// ИНФОРМАЦИЯ О ВРЕМЕНИ
|
||
// =============================================================================
|
||
|
||
func (n *Node) GetLastSeen() int64 {
|
||
return n.lastSeen.Load()
|
||
}
|
||
|
||
func (n *Node) GetLastSeenStr() string {
|
||
lastSeen := n.lastSeen.Load()
|
||
if lastSeen == 0 {
|
||
return "never"
|
||
}
|
||
return time.UnixMilli(lastSeen).Format("2006-01-02 15:04:05.000")
|
||
}
|
||
|
||
func (n *Node) GetJoinedAt() int64 {
|
||
return n.joinedAt.Load()
|
||
}
|
||
|
||
func (n *Node) GetJoinedAtStr() string {
|
||
joinedAt := n.joinedAt.Load()
|
||
if joinedAt == 0 {
|
||
return "not joined"
|
||
}
|
||
return time.UnixMilli(joinedAt).Format("2006-01-02 15:04:05.000")
|
||
}
|
||
|
||
func (n *Node) GetStartedAt() int64 {
|
||
return n.startedAt
|
||
}
|
||
|
||
func (n *Node) GetStartedAtStr() string {
|
||
return time.UnixMilli(n.startedAt).Format("2006-01-02 15:04:05.000")
|
||
}
|
||
|
||
func (n *Node) GetCreatedAt() int64 {
|
||
return n.createdAt
|
||
}
|
||
|
||
func (n *Node) GetCreatedAtStr() string {
|
||
return time.UnixMilli(n.createdAt).Format("2006-01-02 15:04:05.000")
|
||
}
|
||
|
||
func (n *Node) GetUptime() time.Duration {
|
||
if n.startedAt == 0 {
|
||
return 0
|
||
}
|
||
return time.Duration(time.Now().UnixMilli()-n.startedAt) * time.Millisecond
|
||
}
|
||
|
||
func (n *Node) GetAddress() string {
|
||
return fmt.Sprintf("%s:%d", n.IP, n.Port)
|
||
}
|
||
|
||
// =============================================================================
|
||
// СТАТИСТИКА
|
||
// =============================================================================
|
||
|
||
func (n *Node) GetStats() map[string]interface{} {
|
||
stats := map[string]interface{}{
|
||
"id": n.ID,
|
||
"ip": n.IP,
|
||
"port": n.Port,
|
||
"status": n.GetNodeStatus(),
|
||
"created_at": n.GetCreatedAtStr(),
|
||
"started_at": n.GetStartedAtStr(),
|
||
"joined_at": n.GetJoinedAtStr(),
|
||
"last_seen": n.GetLastSeenStr(),
|
||
"uptime": n.GetUptime().String(),
|
||
"request_count": n.requestCount.Load(),
|
||
"bytes_rx": n.bytesRx.Load(),
|
||
"bytes_tx": n.bytesTx.Load(),
|
||
}
|
||
|
||
if n.workerPool != nil {
|
||
stats["worker_pool"] = n.workerPool.GetStats()
|
||
}
|
||
|
||
if n.replicator != nil {
|
||
stats["replication"] = n.replicator.GetStats()
|
||
}
|
||
|
||
if n.panicRecoveryMgr != nil {
|
||
n.routinesMu.RLock()
|
||
routineStatus := make(map[string]bool)
|
||
for name, routine := range n.recoverableRoutines {
|
||
routineStatus[name] = routine.IsRunning()
|
||
}
|
||
n.routinesMu.RUnlock()
|
||
stats["recoverable_routines"] = routineStatus
|
||
stats["panic_recovery_stats"] = n.panicRecoveryMgr.GetStats()
|
||
}
|
||
|
||
return stats
|
||
}
|
||
|
||
func (n *Node) GetWorkerPoolStats() map[string]interface{} {
|
||
if n.workerPool == nil {
|
||
return map[string]interface{}{"enabled": false}
|
||
}
|
||
return n.workerPool.GetStats()
|
||
}
|
||
|
||
func (n *Node) GetReplicationStats() map[string]interface{} {
|
||
if n.replicator == nil {
|
||
return map[string]interface{}{"enabled": false}
|
||
}
|
||
return n.replicator.GetStats()
|
||
}
|
||
|
||
func (n *Node) GetPanicRecoveryStats() map[string]interface{} {
|
||
if n.panicRecoveryMgr == nil {
|
||
return map[string]interface{}{"enabled": false}
|
||
}
|
||
return n.panicRecoveryMgr.GetStats()
|
||
}
|
||
|
||
// =============================================================================
|
||
// РЕПЛИКАЦИЯ ДОКУМЕНТОВ
|
||
// =============================================================================
|
||
|
||
func generateReplicationID() string {
|
||
bytes := make([]byte, 16)
|
||
rand.Read(bytes)
|
||
return base64.URLEncoding.EncodeToString(bytes)
|
||
}
|
||
|
||
func (n *Node) ReplicateDocument(database, collection string, doc *storage.Document) error {
|
||
if n.coordinator == nil {
|
||
if n.logger != nil {
|
||
n.logger.Warn("No coordinator set, skipping replication")
|
||
}
|
||
return fmt.Errorf("no coordinator set")
|
||
}
|
||
|
||
nodes := n.coordinator.GetActiveNodes()
|
||
if len(nodes) <= 1 {
|
||
if n.logger != nil {
|
||
n.logger.Debug("No other nodes for replication")
|
||
}
|
||
return nil
|
||
}
|
||
|
||
repData := struct {
|
||
Database string `json:"database"`
|
||
Collection string `json:"collection"`
|
||
Document map[string]interface{} `json:"document"`
|
||
SourceNode string `json:"source_node"`
|
||
ReplicaID string `json:"replica_id"`
|
||
}{
|
||
Database: database,
|
||
Collection: collection,
|
||
Document: doc.GetFields(),
|
||
SourceNode: n.ID,
|
||
ReplicaID: generateReplicationID(),
|
||
}
|
||
|
||
data, err := json.Marshal(repData)
|
||
if err != nil {
|
||
return fmt.Errorf("failed to marshal replication data: %v", err)
|
||
}
|
||
|
||
startTime := time.Now().UnixMilli()
|
||
|
||
var wg sync.WaitGroup
|
||
var failedCount atomic.Int32
|
||
var successCount atomic.Int32
|
||
|
||
for _, nodeInfo := range nodes {
|
||
if nodeInfo.ID == n.ID {
|
||
continue
|
||
}
|
||
|
||
wg.Add(1)
|
||
targetNodeID := nodeInfo.ID
|
||
targetAddress := fmt.Sprintf("%s:%d", nodeInfo.IP, nodeInfo.Port)
|
||
|
||
taskID := fmt.Sprintf("replicate_%s_to_%s_%s", doc.ID, targetNodeID, repData.ReplicaID)
|
||
err := n.workerPool.SubmitFunc(taskID, func() error {
|
||
defer wg.Done()
|
||
|
||
if n.replicator == nil {
|
||
failedCount.Add(1)
|
||
return fmt.Errorf("replicator not initialized")
|
||
}
|
||
|
||
err := n.replicator.Replicate(targetNodeID, targetAddress, data)
|
||
if err != nil {
|
||
failedCount.Add(1)
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Failed to replicate document %s to node %s after retries: %v",
|
||
doc.ID, targetNodeID, err))
|
||
}
|
||
return err
|
||
}
|
||
|
||
successCount.Add(1)
|
||
if n.logger != nil {
|
||
n.logger.Debug(fmt.Sprintf("Successfully replicated document %s to node %s", doc.ID, targetNodeID))
|
||
}
|
||
return nil
|
||
})
|
||
|
||
if err != nil {
|
||
wg.Done()
|
||
failedCount.Add(1)
|
||
if n.logger != nil {
|
||
n.logger.Error(fmt.Sprintf("Failed to submit replication task for %s to %s: %v",
|
||
doc.ID, targetNodeID, err))
|
||
}
|
||
}
|
||
}
|
||
|
||
done := make(chan struct{})
|
||
go func() {
|
||
wg.Wait()
|
||
close(done)
|
||
}()
|
||
|
||
select {
|
||
case <-done:
|
||
duration := time.Now().UnixMilli() - startTime
|
||
if n.logger != nil {
|
||
n.logger.Info(fmt.Sprintf("Replicated document %s to %d/%d nodes (took %d ms)",
|
||
doc.ID, successCount.Load(), len(nodes)-1, duration))
|
||
}
|
||
case <-time.After(30 * time.Second):
|
||
if n.logger != nil {
|
||
n.logger.Warn(fmt.Sprintf("Replication timeout for document %s after %d ms", doc.ID, time.Now().UnixMilli()-startTime))
|
||
}
|
||
return fmt.Errorf("replication timeout")
|
||
}
|
||
|
||
if failedCount.Load() > 0 {
|
||
return fmt.Errorf("replication partially failed: %d of %d nodes failed", failedCount.Load(), len(nodes)-1)
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
// =============================================================================
|
||
// УПРАВЛЕНИЕ PANIC RECOVERY
|
||
// =============================================================================
|
||
|
||
func (n *Node) SetPanicRecoveryManager(mgr *PanicRecoveryManager) {
|
||
n.panicRecoveryMgr = mgr
|
||
if n.logger != nil {
|
||
n.logger.Debug("Panic recovery manager set for node")
|
||
}
|
||
}
|
||
|
||
// =============================================================================
|
||
// ОСТАНОВКА УЗЛА
|
||
// =============================================================================
|
||
|
||
func (n *Node) Stop() {
|
||
if n.coordinator != nil && n.coordinator.IsLeader() {
|
||
n.SetStatus(StatusOffline)
|
||
}
|
||
n.Status.Store(int32(StatusOffline))
|
||
n.stoppedAt = time.Now().UnixMilli()
|
||
|
||
n.routinesMu.RLock()
|
||
for name, routine := range n.recoverableRoutines {
|
||
routine.Stop()
|
||
if n.logger != nil {
|
||
n.logger.Debug(fmt.Sprintf("Stopped recoverable routine: %s", name))
|
||
}
|
||
}
|
||
n.routinesMu.RUnlock()
|
||
|
||
close(n.stopChan)
|
||
|
||
if n.workerPool != nil {
|
||
n.workerPool.Stop()
|
||
}
|
||
|
||
if n.replicator != nil {
|
||
n.replicator.Close()
|
||
}
|
||
|
||
n.connPool.Range(func(key, value interface{}) bool {
|
||
if conn, ok := value.(net.Conn); ok {
|
||
conn.Close()
|
||
}
|
||
return true
|
||
})
|
||
|
||
if n.logger != nil {
|
||
n.logger.Info(fmt.Sprintf("Node %s stopped at %s", n.ID, time.UnixMilli(n.stoppedAt).Format("2006-01-02 15:04:05.000")))
|
||
}
|
||
}
|