fix poller not restarting after indexer mode changes

Author: iuwqyir

internal/orchestrator/poller.go

@@ -20,15 +20,18 @@ const DEFAULT_BLOCKS_PER_POLL = 10
 const DEFAULT_TRIGGER_INTERVAL = 1000
 
 type Poller struct {
-	rpc               rpc.IRPCClient
-	blocksPerPoll     int64
-	triggerIntervalMs int64
-	storage           storage.IStorage
-	lastPolledBlock   *big.Int
-	pollFromBlock     *big.Int
-	pollUntilBlock    *big.Int
-	parallelPollers   int
-	workModeChan      chan WorkMode
+	rpc                  rpc.IRPCClient
+	blocksPerPoll        int64
+	triggerIntervalMs    int64
+	storage              storage.IStorage
+	lastPolledBlock      *big.Int
+	lastPolledBlockMutex sync.RWMutex
+	pollFromBlock        *big.Int
+	pollUntilBlock       *big.Int
+	parallelPollers      int
+	workModeChan         chan WorkMode
+	currentWorkMode      WorkMode
+	workModeMutex        sync.RWMutex
 }
 
 type BlockNumberWithError struct {
@@ -117,6 +120,15 @@ func (p *Poller) Start(ctx context.Context) {
 					if !ok {
 						return
 					}
+
+					// Do not poll if not in backfill mode
+					p.workModeMutex.RLock()
+					if p.currentWorkMode != WorkModeBackfill {
+						p.workModeMutex.RUnlock()
+						continue
+					}
+					p.workModeMutex.RUnlock()
+
 					blockRangeMutex.Lock()
 					blockNumbers, err := p.getNextBlockRange(pollCtx)
 					blockRangeMutex.Unlock()
@@ -149,10 +161,26 @@ func (p *Poller) Start(ctx context.Context) {
 			p.shutdown(cancel, tasks, &wg)
 			return
 		case workMode := <-p.workModeChan:
-			if workMode == WorkModeLive {
-				log.Info().Msg("Switching to live mode, stopping poller")
-				p.shutdown(cancel, tasks, &wg)
-				return
+			p.workModeMutex.RLock()
+			currentWorkMode := p.currentWorkMode
+			p.workModeMutex.RUnlock()
+			if workMode != currentWorkMode && workMode != "" {
+				log.Info().Msgf("Poller work mode changing from %s to %s", currentWorkMode, workMode)
+				p.workModeMutex.Lock()
+				changedToBackfillFromLive := currentWorkMode == WorkModeLive && workMode == WorkModeBackfill
+				p.currentWorkMode = workMode
+				p.workModeMutex.Unlock()
+				if changedToBackfillFromLive {
+					lastBlockInMainStorage, err := p.storage.MainStorage.GetMaxBlockNumber(p.rpc.GetChainID())
+					if err != nil {
+						log.Error().Err(err).Msg("Error getting last block in main storage")
+					} else {
+						p.lastPolledBlockMutex.Lock()
+						p.lastPolledBlock = lastBlockInMainStorage
+						p.lastPolledBlockMutex.Unlock()
+						log.Debug().Msgf("Switching to backfill mode, updating last polled block to %s", p.lastPolledBlock.String())
+					}
+				}
 			}
 		case <-ticker.C:
 			select {