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Golang Gossip.GetSystemConfig方法代码示例

本文整理汇总了Golang中github.com/cockroachdb/cockroach/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github.com/cockroachdb/cockroach/gossip.Gossip的用法示例。


在下文中一共展示了Gossip.GetSystemConfig方法的4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: NewExecutor

// 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
}
开发者ID:harryge00,项目名称:cockroach,代码行数:27,代码来源:executor.go

示例2: 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("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
			}
		}
	})
}
开发者ID:JKhawaja,项目名称:cockroach,代码行数:62,代码来源:lease.go

示例3: NewExecutor

// 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
}
开发者ID:soniabhishek,项目名称:cockroach,代码行数:36,代码来源:executor.go

示例4: 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(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
			}
		}
	})
}
开发者ID:ming-hai,项目名称:cockroach,代码行数:55,代码来源:lease.go


注:本文中的github.com/cockroachdb/cockroach/gossip.Gossip.GetSystemConfig方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。