// Send implements the client.Sender interface. The store is looked up from the
// store map if specified by the request; otherwise, the command is being
// executed locally, and the replica is determined via lookup through each
// store's LookupRange method. The latter path is taken only by unit tests.
func (ls *Stores) Send(ctx context.Context, ba roachpb.BatchRequest) (*roachpb.BatchResponse, *roachpb.Error) {
var store *Store
var err error
// If we aren't given a Replica, then a little bending over
// backwards here. This case applies exclusively to unittests.
if ba.RangeID == 0 || ba.Replica.StoreID == 0 {
var repl *roachpb.ReplicaDescriptor
var rangeID roachpb.RangeID
rs := keys.Range(ba)
rangeID, repl, err = ls.lookupReplica(rs.Key, rs.EndKey)
if err == nil {
ba.RangeID = rangeID
ba.Replica = *repl
}
}
ctx = log.Add(ctx,
log.RangeID, ba.RangeID)
if err == nil {
store, err = ls.GetStore(ba.Replica.StoreID)
}
if err != nil {
return nil, roachpb.NewError(err)
}
sp, cleanupSp := tracing.SpanFromContext(opStores, store.Tracer(), ctx)
defer cleanupSp()
if ba.Txn != nil {
// For calls that read data within a txn, we keep track of timestamps
// observed from the various participating nodes' HLC clocks. If we have
// a timestamp on file for this Node which is smaller than MaxTimestamp,
// we can lower MaxTimestamp accordingly. If MaxTimestamp drops below
// OrigTimestamp, we effectively can't see uncertainty restarts any
// more.
// Note that it's not an issue if MaxTimestamp propagates back out to
// the client via a returned Transaction update - when updating a Txn
// from another, the larger MaxTimestamp wins.
if maxTS, ok := ba.Txn.GetObservedTimestamp(ba.Replica.NodeID); ok && maxTS.Less(ba.Txn.MaxTimestamp) {
// Copy-on-write to protect others we might be sharing the Txn with.
shallowTxn := *ba.Txn
// The uncertainty window is [OrigTimestamp, maxTS), so if that window
// is empty, there won't be any uncertainty restarts.
if !ba.Txn.OrigTimestamp.Less(maxTS) {
sp.LogEvent("read has no clock uncertainty")
}
shallowTxn.MaxTimestamp.Backward(maxTS)
ba.Txn = &shallowTxn
}
}
br, pErr := store.Send(ctx, ba)
if br != nil && br.Error != nil {
panic(roachpb.ErrorUnexpectedlySet(store, br))
}
return br, pErr
}
// SendBatch implements batch.Sender.
func (ls *LocalSender) SendBatch(ctx context.Context, ba proto.BatchRequest) (*proto.BatchResponse, error) {
trace := tracer.FromCtx(ctx)
var store *storage.Store
var err error
// If we aren't given a Replica, then a little bending over
// backwards here. This case applies exclusively to unittests.
if ba.RangeID == 0 || ba.Replica.StoreID == 0 {
var repl *proto.Replica
var rangeID proto.RangeID
rangeID, repl, err = ls.lookupReplica(ba.Key, ba.EndKey)
if err == nil {
ba.RangeID = rangeID
ba.Replica = *repl
}
}
ctx = log.Add(ctx,
log.Method, ba.Method(), // TODO(tschottdorf): Method() always `Batch`.
log.Key, ba.Key,
log.RangeID, ba.RangeID)
if err == nil {
store, err = ls.GetStore(ba.Replica.StoreID)
}
var br *proto.BatchResponse
if err == nil {
// For calls that read data within a txn, we can avoid uncertainty
// related retries in certain situations. If the node is in
// "CertainNodes", we need not worry about uncertain reads any
// more. Setting MaxTimestamp=Timestamp for the operation
// accomplishes that. See proto.Transaction.CertainNodes for details.
if ba.Txn != nil && ba.Txn.CertainNodes.Contains(ba.Replica.NodeID) {
// MaxTimestamp = Timestamp corresponds to no clock uncertainty.
trace.Event("read has no clock uncertainty")
ba.Txn.MaxTimestamp = ba.Txn.Timestamp
}
{
var tmpR proto.Response
// TODO(tschottdorf): &ba -> ba
tmpR, err = store.ExecuteCmd(ctx, &ba)
// TODO(tschottdorf): remove this dance once BatchResponse is returned.
if tmpR != nil {
br = tmpR.(*proto.BatchResponse)
if br.Error != nil {
panic(proto.ErrorUnexpectedlySet)
}
}
}
}
// TODO(tschottdorf): Later error needs to be associated to an index
// and ideally individual requests don't even have an error in their
// header. See #1891.
return br, err
}
// Send implements the client.Sender interface. The store is looked up from the
// store map if specified by the request; otherwise, the command is being
// executed locally, and the replica is determined via lookup through each
// store's LookupRange method. The latter path is taken only by unit tests.
func (ls *Stores) Send(ctx context.Context, ba roachpb.BatchRequest) (*roachpb.BatchResponse, *roachpb.Error) {
sp := tracing.SpanFromContext(ctx)
var store *Store
var pErr *roachpb.Error
// If we aren't given a Replica, then a little bending over
// backwards here. This case applies exclusively to unittests.
if ba.RangeID == 0 || ba.Replica.StoreID == 0 {
var repl *roachpb.ReplicaDescriptor
var rangeID roachpb.RangeID
rs := keys.Range(ba)
rangeID, repl, pErr = ls.lookupReplica(rs.Key, rs.EndKey)
if pErr == nil {
ba.RangeID = rangeID
ba.Replica = *repl
}
}
ctx = log.Add(ctx,
log.RangeID, ba.RangeID)
if pErr == nil {
store, pErr = ls.GetStore(ba.Replica.StoreID)
}
var br *roachpb.BatchResponse
if pErr != nil {
return nil, pErr
}
// For calls that read data within a txn, we can avoid uncertainty
// related retries in certain situations. If the node is in
// "CertainNodes", we need not worry about uncertain reads any
// more. Setting MaxTimestamp=OrigTimestamp for the operation
// accomplishes that. See roachpb.Transaction.CertainNodes for details.
if ba.Txn != nil && ba.Txn.CertainNodes.Contains(ba.Replica.NodeID) {
// MaxTimestamp = Timestamp corresponds to no clock uncertainty.
sp.LogEvent("read has no clock uncertainty")
// Copy-on-write to protect others we might be sharing the Txn with.
shallowTxn := *ba.Txn
// We set to OrigTimestamp because that works for both SNAPSHOT and
// SERIALIZABLE: If we used Timestamp instead, we could run into
// unnecessary retries at SNAPSHOT. For example, a SNAPSHOT txn at
// OrigTimestamp = 1000.0, Timestamp = 2000.0, MaxTimestamp = 3000.0
// will always read at 1000, so a MaxTimestamp of 2000 will still let
// it restart with uncertainty when it finds a value in (1000, 2000).
shallowTxn.MaxTimestamp = ba.Txn.OrigTimestamp
ba.Txn = &shallowTxn
}
br, pErr = store.Send(ctx, ba)
if br != nil && br.Error != nil {
panic(roachpb.ErrorUnexpectedlySet(store, br))
}
return br, pErr
}
// Send implements the client.Sender interface. The store is looked
// up from the store map if specified by header.Replica; otherwise,
// the command is being executed locally, and the replica is
// determined via lookup through each store's LookupRange method.
func (ls *LocalSender) Send(ctx context.Context, call proto.Call) {
var err error
var store *storage.Store
trace := tracer.FromCtx(ctx)
// If we aren't given a Replica, then a little bending over
// backwards here. This case applies exclusively to unittests.
header := call.Args.Header()
if header.RaftID == 0 || header.Replica.StoreID == 0 {
var repl *proto.Replica
var raftID proto.RaftID
raftID, repl, err = ls.lookupReplica(header.Key, header.EndKey)
if err == nil {
header.RaftID = raftID
header.Replica = *repl
}
}
ctx = log.Add(ctx,
log.Method, call.Method(),
log.Key, header.Key,
log.RaftID, header.RaftID)
if err == nil {
store, err = ls.GetStore(header.Replica.StoreID)
}
var reply proto.Response
if err == nil {
// For calls that read data within a txn, we can avoid uncertainty
// related retries in certain situations. If the node is in
// "CertainNodes", we need not worry about uncertain reads any
// more. Setting MaxTimestamp=Timestamp for the operation
// accomplishes that. See proto.Transaction.CertainNodes for details.
if header.Txn != nil && header.Txn.CertainNodes.Contains(header.Replica.NodeID) {
// MaxTimestamp = Timestamp corresponds to no clock uncertainty.
trace.Event("read has no clock uncertainty")
header.Txn.MaxTimestamp = header.Txn.Timestamp
}
reply, err = store.ExecuteCmd(ctx, call.Args)
}
if reply != nil {
gogoproto.Merge(call.Reply, reply)
}
if call.Reply.Header().Error != nil {
panic(proto.ErrorUnexpectedlySet)
}
if err != nil {
call.Reply.Header().SetGoError(err)
}
}
// Send implements the client.Sender interface. The store is looked up from the
// store map if specified by the request; otherwise, the command is being
// executed locally, and the replica is determined via lookup through each
// store's LookupRange method. The latter path is taken only by unit tests.
func (ls *Stores) Send(ctx context.Context, ba roachpb.BatchRequest) (*roachpb.BatchResponse, *roachpb.Error) {
sp := tracing.SpanFromContext(ctx)
var store *Store
var pErr *roachpb.Error
// If we aren't given a Replica, then a little bending over
// backwards here. This case applies exclusively to unittests.
if ba.RangeID == 0 || ba.Replica.StoreID == 0 {
var repl *roachpb.ReplicaDescriptor
var rangeID roachpb.RangeID
rs := keys.Range(ba)
rangeID, repl, pErr = ls.lookupReplica(rs.Key, rs.EndKey)
if pErr == nil {
ba.RangeID = rangeID
ba.Replica = *repl
}
}
ctx = log.Add(ctx,
log.RangeID, ba.RangeID)
if pErr == nil {
store, pErr = ls.GetStore(ba.Replica.StoreID)
}
var br *roachpb.BatchResponse
if pErr != nil {
return nil, pErr
}
// For calls that read data within a txn, we can avoid uncertainty
// related retries in certain situations. If the node is in
// "CertainNodes", we need not worry about uncertain reads any
// more. Setting MaxTimestamp=Timestamp for the operation
// accomplishes that. See roachpb.Transaction.CertainNodes for details.
if ba.Txn != nil && ba.Txn.CertainNodes.Contains(ba.Replica.NodeID) {
// MaxTimestamp = Timestamp corresponds to no clock uncertainty.
sp.LogEvent("read has no clock uncertainty")
// Copy-on-write to protect others we might be sharing the Txn with.
shallowTxn := *ba.Txn
shallowTxn.MaxTimestamp = ba.Txn.Timestamp
ba.Txn = &shallowTxn
}
br, pErr = store.Send(ctx, ba)
if br != nil && br.Error != nil {
panic(roachpb.ErrorUnexpectedlySet(store, br))
}
return br, pErr
}
// Send implements the client.Sender interface. The store is looked up from the
// store map if specified by the request; otherwise, the command is being
// executed locally, and the replica is determined via lookup through each
// store's LookupRange method. The latter path is taken only by unit tests.
func (ls *LocalSender) Send(ctx context.Context, ba roachpb.BatchRequest) (*roachpb.BatchResponse, *roachpb.Error) {
trace := tracer.FromCtx(ctx)
var store *storage.Store
var err error
// If we aren't given a Replica, then a little bending over
// backwards here. This case applies exclusively to unittests.
if ba.RangeID == 0 || ba.Replica.StoreID == 0 {
var repl *roachpb.ReplicaDescriptor
var rangeID roachpb.RangeID
key, endKey := keys.Range(ba)
rangeID, repl, err = ls.lookupReplica(key, endKey)
if err == nil {
ba.RangeID = rangeID
ba.Replica = *repl
}
}
ctx = log.Add(ctx,
log.RangeID, ba.RangeID)
if err == nil {
store, err = ls.GetStore(ba.Replica.StoreID)
}
var br *roachpb.BatchResponse
if err != nil {
return nil, roachpb.NewError(err)
}
// For calls that read data within a txn, we can avoid uncertainty
// related retries in certain situations. If the node is in
// "CertainNodes", we need not worry about uncertain reads any
// more. Setting MaxTimestamp=Timestamp for the operation
// accomplishes that. See roachpb.Transaction.CertainNodes for details.
if ba.Txn != nil && ba.Txn.CertainNodes.Contains(ba.Replica.NodeID) {
// MaxTimestamp = Timestamp corresponds to no clock uncertainty.
trace.Event("read has no clock uncertainty")
ba.Txn.MaxTimestamp = ba.Txn.Timestamp
}
br, pErr := store.Send(ctx, ba)
if br != nil && br.Error != nil {
panic(roachpb.ErrorUnexpectedlySet(store, br))
}
return br, pErr
}
// context returns a context encapsulating the NodeID.
func (n *Node) context() context.Context {
return log.Add(context.Background(), log.NodeID, n.Descriptor.NodeID)
}
// context returns a context encapsulating the NodeID, derived from the
// supplied context (which is not allowed to be nil).
func (n *Node) context(ctx context.Context) context.Context {
if ctx == nil {
panic("ctx cannot be nil")
}
return log.Add(ctx, log.NodeID, n.Descriptor.NodeID)
}