Golang server.SegToBytes函数代码示例

func newTwoBTxnVotesSender(outcome *msgs.Outcome, txnId *common.TxnId, submitter common.RMId, recipients ...common.RMId) *twoBTxnVotesSender {
	submitterSeg := capn.NewBuffer(nil)
	submitterMsg := msgs.NewRootMessage(submitterSeg)
	submitterMsg.SetSubmissionOutcome(*outcome)

	if outcome.Which() == msgs.OUTCOME_ABORT {
		abort := outcome.Abort()
		abort.SetResubmit() // nuke out the updates as proposers don't need them.
	}

	seg := capn.NewBuffer(nil)
	msg := msgs.NewRootMessage(seg)
	twoB := msgs.NewTwoBTxnVotes(seg)
	msg.SetTwoBTxnVotes(twoB)
	twoB.SetOutcome(*outcome)

	server.Log(txnId, "Sending 2B to", recipients)

	return &twoBTxnVotesSender{
		msg:          server.SegToBytes(seg),
		recipients:   recipients,
		submitterMsg: server.SegToBytes(submitterSeg),
		submitter:    submitter,
	}
}

func (cr *connectionRun) start() (bool, error) {
	log.Printf("Connection established to %v (%v)\n", cr.remoteHost, cr.remoteRMId)

	seg := capn.NewBuffer(nil)
	message := msgs.NewRootMessage(seg)
	message.SetHeartbeat()
	cr.beatBytes = server.SegToBytes(seg)

	if cr.isServer {
		cr.connectionManager.ServerEstablished(cr.Connection)
	}
	if cr.isClient {
		topology, servers := cr.connectionManager.ClientEstablished(cr.ConnectionNumber, cr.Connection)
		cr.connectionManager.AddSender(cr.Connection)
		cr.submitter = client.NewClientTxnSubmitter(cr.connectionManager.RMId, cr.connectionManager.BootCount, topology, cr.connectionManager)
		cr.submitter.TopologyChange(nil, servers)
	}
	cr.mustSendBeat = true
	cr.missingBeats = 0

	cr.beater = newConnectionBeater(cr.Connection)
	go cr.beater.beat()

	cr.reader = newConnectionReader(cr.Connection)
	go cr.reader.read()

	return false, nil
}

func (cr *connectionRun) handleMsgFromPeer(msg *msgs.Message) error {
	if cr.currentState != cr {
		// probably just draining the queue from the reader after a restart
		return nil
	}
	cr.missingBeats = 0
	switch which := msg.Which(); which {
	case msgs.MESSAGE_HEARTBEAT:
		// do nothing
	case msgs.MESSAGE_CLIENTTXNSUBMISSION:
		ctxn := msg.ClientTxnSubmission()
		origTxnId := common.MakeTxnId(ctxn.Id())
		cr.submitter.SubmitClientTransaction(&ctxn, func(clientOutcome *msgs.ClientTxnOutcome, err error) {
			switch {
			case err != nil:
				cr.clientTxnError(&ctxn, err, origTxnId)
			case clientOutcome == nil: // shutdown
				return
			default:
				seg := capn.NewBuffer(nil)
				msg := msgs.NewRootMessage(seg)
				msg.SetClientTxnOutcome(*clientOutcome)
				cr.sendMessage(server.SegToBytes(msg.Segment))
			}
		})
	default:
		cr.connectionManager.Dispatchers.DispatchMessage(cr.remoteRMId, which, msg)
	}
	return nil
}

func (palc *proposerAwaitLocallyComplete) maybeWriteToDisk() {
	if !(palc.currentState == palc && palc.callbackInvoked && palc.allAcceptorsAgreed) {
		return
	}

	stateSeg := capn.NewBuffer(nil)
	state := msgs.NewRootProposerState(stateSeg)
	acceptorsCap := stateSeg.NewUInt32List(len(palc.acceptors))
	state.SetAcceptors(acceptorsCap)
	for idx, rmId := range palc.acceptors {
		acceptorsCap.Set(idx, uint32(rmId))
	}

	data := server.SegToBytes(stateSeg)

	future := palc.proposerManager.Disk.ReadWriteTransaction(false, func(rwtxn *mdbs.RWTxn) (interface{}, error) {
		return nil, rwtxn.Put(db.DB.Proposers, palc.txnId[:], data, 0)
	})
	go func() {
		if _, err := future.ResultError(); err != nil {
			log.Printf("Error: %v when writing proposer to disk: %v\n", palc.txnId, err)
			return
		}
		palc.proposerManager.Exe.Enqueue(palc.writeDone)
	}()
}

func (awtd *acceptorWriteToDisk) start() {
	outcome := awtd.outcome
	outcomeCap := (*msgs.Outcome)(outcome)
	awtd.sendToAll = awtd.sendToAll || outcomeCap.Which() == msgs.OUTCOME_COMMIT
	sendToAll := awtd.sendToAll
	stateSeg := capn.NewBuffer(nil)
	state := msgs.NewRootAcceptorState(stateSeg)
	state.SetTxn(*awtd.ballotAccumulator.Txn)
	state.SetOutcome(*outcomeCap)
	state.SetSendToAll(awtd.sendToAll)
	state.SetInstances(awtd.ballotAccumulator.AddInstancesToSeg(stateSeg))

	data := server.SegToBytes(stateSeg)

	// to ensure correct order of writes, schedule the write from
	// the current go-routine...
	server.Log(awtd.txnId, "Writing 2B to disk...")
	future := awtd.acceptorManager.Disk.ReadWriteTransaction(false, func(rwtxn *mdbs.RWTxn) (interface{}, error) {
		return nil, rwtxn.Put(db.DB.BallotOutcomes, awtd.txnId[:], data, 0)
	})
	go func() {
		// ... but process the result in a new go-routine to avoid blocking the executor.
		if _, err := future.ResultError(); err != nil {
			log.Printf("Error: %v Acceptor Write error: %v", awtd.txnId, err)
			return
		}
		server.Log(awtd.txnId, "Writing 2B to disk...done.")
		awtd.acceptorManager.Exe.Enqueue(func() { awtd.writeDone(outcome, sendToAll) })
	}()
}

func (am *AcceptorManager) OneATxnVotesReceived(sender common.RMId, txnId *common.TxnId, oneATxnVotes *msgs.OneATxnVotes) {
	instanceRMId := common.RMId(oneATxnVotes.RmId())
	server.Log(txnId, "1A received from", sender, "; instance:", instanceRMId)
	instId := instanceId([instanceIdLen]byte{})
	instIdSlice := instId[:]
	copy(instIdSlice, txnId[:])
	binary.BigEndian.PutUint32(instIdSlice[common.KeyLen:], uint32(instanceRMId))

	replySeg := capn.NewBuffer(nil)
	msg := msgs.NewRootMessage(replySeg)
	oneBTxnVotes := msgs.NewOneBTxnVotes(replySeg)
	msg.SetOneBTxnVotes(oneBTxnVotes)
	oneBTxnVotes.SetRmId(oneATxnVotes.RmId())
	oneBTxnVotes.SetTxnId(oneATxnVotes.TxnId())

	proposals := oneATxnVotes.Proposals()
	promises := msgs.NewTxnVotePromiseList(replySeg, proposals.Len())
	oneBTxnVotes.SetPromises(promises)
	for idx, l := 0, proposals.Len(); idx < l; idx++ {
		proposal := proposals.At(idx)
		vUUId := common.MakeVarUUId(proposal.VarId())
		copy(instIdSlice[common.KeyLen+4:], vUUId[:])
		promise := promises.At(idx)
		promise.SetVarId(vUUId[:])
		am.ensureInstance(txnId, &instId, vUUId).OneATxnVotesReceived(&proposal, &promise)
	}

	NewOneShotSender(server.SegToBytes(replySeg), am.ConnectionManager, sender)
}

func MakeTxnSubmissionAbortMsg(txnId *common.TxnId) []byte {
	seg := capn.NewBuffer(nil)
	msg := msgs.NewRootMessage(seg)
	tsa := msgs.NewTxnSubmissionAbort(seg)
	msg.SetSubmissionAbort(tsa)
	tsa.SetTxnId(txnId[:])
	return server.SegToBytes(seg)
}

func MakeTxnSubmissionCompleteMsg(txnId *common.TxnId) []byte {
	seg := capn.NewBuffer(nil)
	msg := msgs.NewRootMessage(seg)
	tsc := msgs.NewTxnSubmissionComplete(seg)
	msg.SetSubmissionComplete(tsc)
	tsc.SetTxnId(txnId[:])
	return server.SegToBytes(seg)
}

func MakeTxnLocallyCompleteMsg(txnId *common.TxnId) []byte {
	seg := capn.NewBuffer(nil)
	msg := msgs.NewRootMessage(seg)
	tlc := msgs.NewTxnLocallyComplete(seg)
	msg.SetTxnLocallyComplete(tlc)
	tlc.SetTxnId(txnId[:])
	return server.SegToBytes(seg)
}

func TxnToRootBytes(txn *msgs.Txn) []byte {
	seg := capn.NewBuffer(nil)
	txnCap := msgs.NewRootTxn(seg)
	txnCap.SetId(txn.Id())
	txnCap.SetRetry(txn.Retry())
	txnCap.SetSubmitter(txn.Submitter())
	txnCap.SetSubmitterBootCount(txn.SubmitterBootCount())
	txnCap.SetActions(txn.Actions())
	txnCap.SetAllocations(txn.Allocations())
	txnCap.SetFInc(txn.FInc())
	txnCap.SetTopologyVersion(txn.TopologyVersion())

	return server.SegToBytes(seg)
}

func (adfd *acceptorDeleteFromDisk) deletionDone() {
	if adfd.currentState == adfd {
		adfd.nextState(nil)
		adfd.acceptorManager.AcceptorFinished(adfd.txnId)

		seg := capn.NewBuffer(nil)
		msg := msgs.NewRootMessage(seg)
		tgc := msgs.NewTxnGloballyComplete(seg)
		msg.SetTxnGloballyComplete(tgc)
		tgc.SetTxnId(adfd.txnId[:])
		server.Log(adfd.txnId, "Sending TGC to", adfd.tgcRecipients)
		NewOneShotSender(server.SegToBytes(seg), adfd.acceptorManager.ConnectionManager, adfd.tgcRecipients...)
	}
}

func (sts *SimpleTxnSubmitter) SubmitTransaction(txnCap *msgs.Txn, activeRMs []common.RMId, continuation TxnCompletionConsumer, delay time.Duration) {
	seg := capn.NewBuffer(nil)
	msg := msgs.NewRootMessage(seg)
	msg.SetTxnSubmission(*txnCap)

	txnId := common.MakeTxnId(txnCap.Id())
	server.Log(txnId, "Submitting txn")
	txnSender := paxos.NewRepeatingSender(server.SegToBytes(seg), activeRMs...)
	if delay == 0 {
		sts.connectionManager.AddSender(txnSender)
	} else {
		go func() {
			// fmt.Printf("%v ", delay)
			time.Sleep(delay)
			sts.connectionManager.AddSender(txnSender)
		}()
	}
	acceptors := paxos.GetAcceptorsFromTxn(txnCap)

	shutdownFun := func(shutdown bool) {
		delete(sts.outcomeConsumers, *txnId)
		// fmt.Printf("sts%v ", len(sts.outcomeConsumers))
		sts.connectionManager.RemoveSenderAsync(txnSender)
		paxos.NewOneShotSender(paxos.MakeTxnSubmissionCompleteMsg(txnId), sts.connectionManager, acceptors...)
		if shutdown {
			if txnCap.Retry() {
				paxos.NewOneShotSender(paxos.MakeTxnSubmissionAbortMsg(txnId), sts.connectionManager, activeRMs...)
			}
			continuation(txnId, nil)
		}
	}
	shutdownFunPtr := &shutdownFun
	sts.onShutdown[shutdownFunPtr] = server.EmptyStructVal

	outcomeAccumulator := paxos.NewOutcomeAccumulator(int(txnCap.FInc()), acceptors)
	consumer := func(sender common.RMId, txnId *common.TxnId, outcome *msgs.Outcome) {
		if outcome, _ = outcomeAccumulator.BallotOutcomeReceived(sender, outcome); outcome != nil {
			delete(sts.onShutdown, shutdownFunPtr)
			shutdownFun(false)
			continuation(txnId, outcome)
		}
	}
	sts.outcomeConsumers[*txnId] = consumer
	// fmt.Printf("sts%v ", len(sts.outcomeConsumers))
}

func (am *AcceptorManager) TxnLocallyCompleteReceived(sender common.RMId, txnId *common.TxnId, tlc *msgs.TxnLocallyComplete) {
	if aInst, found := am.acceptors[*txnId]; found && aInst.acceptor != nil {
		server.Log(txnId, "TLC received from", sender, "(acceptor found)")
		aInst.acceptor.TxnLocallyCompleteReceived(sender)

	} else {
		// We must have deleted the acceptor state from disk,
		// immediately prior to sending TGC, and then died. Now we're
		// back up, the proposers have sent us more TLCs, and we should
		// just reply with TGCs.
		server.Log(txnId, "TLC received from", sender, "(acceptor not found)")
		seg := capn.NewBuffer(nil)
		msg := msgs.NewRootMessage(seg)
		tgc := msgs.NewTxnGloballyComplete(seg)
		msg.SetTxnGloballyComplete(tgc)
		tgc.SetTxnId(txnId[:])
		server.Log(txnId, "Sending single TGC to", sender)
		NewOneShotSender(server.SegToBytes(seg), am.ConnectionManager, sender)
	}
}

func (v *Var) maybeWriteFrame(f *frame, action *localAction, positions *common.Positions) {
	if v.writeInProgress != nil {
		v.writeInProgress = func() {
			v.writeInProgress = nil
			v.maybeWriteFrame(f, action, positions)
		}
		return
	}
	v.writeInProgress = func() {
		v.writeInProgress = nil
		v.maybeMakeInactive()
	}

	oldVarCap := *v.varCap

	varSeg := capn.NewBuffer(nil)
	varCap := msgs.NewRootVar(varSeg)
	v.varCap = &varCap
	varCap.SetId(oldVarCap.Id())

	if positions != nil {
		varCap.SetPositions(capn.UInt8List(*positions))
	} else {
		varCap.SetPositions(oldVarCap.Positions())
	}

	varCap.SetWriteTxnId(f.frameTxnId[:])
	varCap.SetWriteTxnClock(f.frameTxnClock.AddToSeg(varSeg))
	varCap.SetWritesClock(f.frameWritesClock.AddToSeg(varSeg))
	varData := server.SegToBytes(varSeg)

	txnBytes := action.TxnRootBytes()

	// to ensure correct order of writes, schedule the write from
	// the current go-routine...
	future := v.disk.ReadWriteTransaction(false, func(rwtxn *mdbs.RWTxn) (interface{}, error) {
		if err := db.WriteTxnToDisk(rwtxn, f.frameTxnId, txnBytes); err != nil {
			return nil, err
		}
		if err := rwtxn.Put(db.DB.Vars, v.UUId[:], varData, 0); err != nil {
			return nil, err
		}
		if v.curFrameOnDisk != nil {
			return nil, db.DeleteTxnFromDisk(rwtxn, v.curFrameOnDisk.frameTxnId)
		}
		return nil, nil
	})
	go func() {
		// ... but process the result in a new go-routine to avoid blocking the executor.
		if _, err := future.ResultError(); err != nil {
			log.Println("Var error when writing to disk:", err)
			return
		}
		// Switch back to the right go-routine
		v.applyToVar(func() {
			server.Log(v.UUId, "Wrote", f.frameTxnId)
			v.curFrameOnDisk = f
			for ancestor := f.parent; ancestor != nil && ancestor.DescendentOnDisk(); ancestor = ancestor.parent {
			}
			v.writeInProgress()
		})
	}()
}