本文整理汇总了Golang中github.com/cockroachdb/cockroach/pkg/gossip.Gossip.GetSystemConfig方法的典型用法代码示例。如果您正苦于以下问题：Golang Gossip.GetSystemConfig方法的具体用法？Golang Gossip.GetSystemConfig怎么用？Golang Gossip.GetSystemConfig使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类github.com/cockroachdb/cockroach/pkg/gossip.Gossip的用法示例。
在下文中一共展示了Gossip.GetSystemConfig方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: RefreshLeases
// 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(context.TODO(), "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(context.TODO(), "%s: unable to unmarshal descriptor %v", kv.Key, kv.Value)
continue
}
switch union := descriptor.Union.(type) {
case *sqlbase.Descriptor_Table:
table := union.Table
table.MaybeUpgradeFormatVersion()
if err := table.ValidateTable(); err != nil {
log.Errorf(context.TODO(), "%s: received invalid table descriptor: %v", kv.Key, table)
continue
}
if log.V(2) {
log.Infof(context.TODO(), "%s: refreshing lease table: %d (%s), version: %d, deleted: %t",
kv.Key, table.ID, table.Name, table.Version, table.Dropped())
}
// Try to refresh the table lease to one >= this version.
if t := m.findTableState(table.ID, false /* create */); t != nil {
if err := t.purgeOldLeases(
db, table.Dropped(), table.Version, m.LeaseStore); err != nil {
log.Warningf(context.TODO(), "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
}
}
})
}