// NewExecutor creates an Executor and registers a callback on the
// system config.
func NewExecutor(db client.DB, gossip *gossip.Gossip, leaseMgr *LeaseManager, metaRegistry *metric.Registry, stopper *stop.Stopper) *Executor {
exec := &Executor{
db: db,
reCache: parser.NewRegexpCache(512),
leaseMgr: leaseMgr,
latency: metaRegistry.Latency("sql.latency"),
}
exec.systemConfigCond = sync.NewCond(&exec.systemConfigMu)
gossipUpdateC := gossip.RegisterSystemConfigChannel()
stopper.RunWorker(func() {
for {
select {
case <-gossipUpdateC:
cfg := gossip.GetSystemConfig()
exec.updateSystemConfig(cfg)
case <-stopper.ShouldStop():
return
}
}
})
return exec
}
// RefreshLeases starts a goroutine that refreshes the lease manager
// leases for tables received in the latest system configuration via gossip.
func (m *LeaseManager) RefreshLeases(s *stop.Stopper, db *client.DB, gossip *gossip.Gossip) {
s.RunWorker(func() {
descKeyPrefix := keys.MakeTablePrefix(uint32(sqlbase.DescriptorTable.ID))
gossipUpdateC := gossip.RegisterSystemConfigChannel()
for {
select {
case <-gossipUpdateC:
cfg, _ := gossip.GetSystemConfig()
if m.testingKnobs.GossipUpdateEvent != nil {
m.testingKnobs.GossipUpdateEvent(cfg)
}
// Read all tables and their versions
if log.V(2) {
log.Info("received a new config; will refresh leases")
}
// Loop through the configuration to find all the tables.
for _, kv := range cfg.Values {
if !bytes.HasPrefix(kv.Key, descKeyPrefix) {
continue
}
// Attempt to unmarshal config into a table/database descriptor.
var descriptor sqlbase.Descriptor
if err := kv.Value.GetProto(&descriptor); err != nil {
log.Warningf("%s: unable to unmarshal descriptor %v", kv.Key, kv.Value)
continue
}
switch union := descriptor.Union.(type) {
case *sqlbase.Descriptor_Table:
table := union.Table
if err := table.Validate(); err != nil {
log.Errorf("%s: received invalid table descriptor: %v", kv.Key, table)
continue
}
if log.V(2) {
log.Infof("%s: refreshing lease table: %d (%s), version: %d",
kv.Key, table.ID, table.Name, table.Version)
}
// Try to refresh the table lease to one >= this version.
if t := m.findTableState(table.ID, false /* create */, nil); t != nil {
if err := t.purgeOldLeases(
db, table.Deleted(), table.Version, m.LeaseStore); err != nil {
log.Warningf("error purging leases for table %d(%s): %s",
table.ID, table.Name, err)
}
}
case *sqlbase.Descriptor_Database:
// Ignore.
}
}
if m.testingKnobs.TestingLeasesRefreshedEvent != nil {
m.testingKnobs.TestingLeasesRefreshedEvent(cfg)
}
case <-s.ShouldStop():
return
}
}
})
}
// NewExecutor creates an Executor and registers a callback on the
// system config.
func NewExecutor(db client.DB, gossip *gossip.Gossip, leaseMgr *LeaseManager, stopper *stop.Stopper) *Executor {
registry := metric.NewRegistry()
exec := &Executor{
db: db,
reCache: parser.NewRegexpCache(512),
leaseMgr: leaseMgr,
registry: registry,
latency: registry.Latency("latency"),
txnBeginCount: registry.Counter("transaction.begincount"),
selectCount: registry.Counter("select.count"),
updateCount: registry.Counter("update.count"),
insertCount: registry.Counter("insert.count"),
deleteCount: registry.Counter("delete.count"),
ddlCount: registry.Counter("ddl.count"),
miscCount: registry.Counter("misc.count"),
}
exec.systemConfigCond = sync.NewCond(&exec.systemConfigMu)
gossipUpdateC := gossip.RegisterSystemConfigChannel()
stopper.RunWorker(func() {
for {
select {
case <-gossipUpdateC:
cfg := gossip.GetSystemConfig()
exec.updateSystemConfig(cfg)
case <-stopper.ShouldStop():
return
}
}
})
return exec
}
// RefreshLeases starts a goroutine that refreshes the lease manager
// leases for tables received in the latest system configuration via gossip.
func (m *LeaseManager) RefreshLeases(s *stop.Stopper, db *client.DB, gossip *gossip.Gossip) {
s.RunWorker(func() {
descKeyPrefix := keys.MakeTablePrefix(uint32(DescriptorTable.ID))
gossipUpdateC := gossip.RegisterSystemConfigChannel()
for {
select {
case <-gossipUpdateC:
cfg := *gossip.GetSystemConfig()
m.updateSystemConfig(cfg)
// Read all tables and their versions
if log.V(2) {
log.Info("received a new config %v", cfg)
}
// Loop through the configuration to find all the tables.
for _, kv := range cfg.Values {
if !bytes.HasPrefix(kv.Key, descKeyPrefix) {
continue
}
// Attempt to unmarshal config into a table/database descriptor.
var descriptor Descriptor
if err := kv.Value.GetProto(&descriptor); err != nil {
log.Warningf("%s: unable to unmarshal descriptor %v", kv.Key, kv.Value)
continue
}
switch union := descriptor.Union.(type) {
case *Descriptor_Table:
table := union.Table
if err := table.Validate(); err != nil {
log.Errorf("%s: received invalid table descriptor: %v", kv.Key, table)
continue
}
if log.V(2) {
log.Infof("%s: refreshing lease table: %d, version: %d",
kv.Key, table.ID, table.Version)
}
// Try to refresh the table lease to one >= this version.
if err := m.refreshLease(db, table.ID, table.Version); err != nil {
log.Warningf("%s: %v", kv.Key, err)
}
case *Descriptor_Database:
// Ignore.
}
}
case <-s.ShouldStop():
return
}
}
})
}