zktopo

package
Version: v2.1.1+incompatible Latest Latest
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Published: May 22, 2017 License: BSD-3-Clause Imports: 19 Imported by: 0

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Index

Constants

View Source
const (
	// GlobalElectionPath is the path used to store global
	// information for master participation in ZK. Exported for tests.
	GlobalElectionPath = "/zk/global/vt/election"
)
View Source
const (
	// GlobalKeyspacesPath is the path used to store global
	// information in ZK. Exported for tests.
	GlobalKeyspacesPath = "/zk/global/vt/keyspaces"
)

Variables

This section is empty.

Functions

func TabletPathForAlias

func TabletPathForAlias(alias *topodatapb.TabletAlias) string

TabletPathForAlias converts a tablet alias to the zk path

Types

type Server

type Server struct {
	// contains filtered or unexported fields
}

Server is the zookeeper topo.Impl implementation.

func (*Server) Close

func (zkts *Server) Close()

Close is part of topo.Server interface.

func (*Server) Create

func (zkts *Server) Create(ctx context.Context, cell, filePath string, contents []byte) (topo.Version, error)

Create is part of the topo.Backend interface.

func (*Server) CreateKeyspace

func (zkts *Server) CreateKeyspace(ctx context.Context, keyspace string, value *topodatapb.Keyspace) error

CreateKeyspace is part of the topo.Server interface

func (*Server) CreateShard

func (zkts *Server) CreateShard(ctx context.Context, keyspace, shard string, value *topodatapb.Shard) error

CreateShard is part of the topo.Server interface

func (*Server) CreateTablet

func (zkts *Server) CreateTablet(ctx context.Context, tablet *topodatapb.Tablet) error

CreateTablet is part of the topo.Server interface

func (*Server) Delete

func (zkts *Server) Delete(ctx context.Context, cell, filePath string, version topo.Version) error

Delete is part of the topo.Backend interface.

func (*Server) DeleteKeyspace

func (zkts *Server) DeleteKeyspace(ctx context.Context, keyspace string) error

DeleteKeyspace is part of the topo.Server interface.

func (*Server) DeleteKeyspaceReplication

func (zkts *Server) DeleteKeyspaceReplication(ctx context.Context, cell, keyspace string) error

DeleteKeyspaceReplication is part of the topo.Server interface

func (*Server) DeleteShard

func (zkts *Server) DeleteShard(ctx context.Context, keyspace, shard string) error

DeleteShard is part of the topo.Server interface

func (*Server) DeleteShardReplication

func (zkts *Server) DeleteShardReplication(ctx context.Context, cell, keyspace, shard string) error

DeleteShardReplication is part of the topo.Server interface

func (*Server) DeleteSrvKeyspace

func (zkts *Server) DeleteSrvKeyspace(ctx context.Context, cell, keyspace string) error

DeleteSrvKeyspace is part of the topo.Server interface

func (*Server) DeleteTablet

func (zkts *Server) DeleteTablet(ctx context.Context, alias *topodatapb.TabletAlias) error

DeleteTablet is part of the topo.Server interface

func (*Server) Get

func (zkts *Server) Get(ctx context.Context, cell, filePath string) ([]byte, topo.Version, error)

Get is part of the topo.Backend interface.

func (*Server) GetKeyspace

func (zkts *Server) GetKeyspace(ctx context.Context, keyspace string) (*topodatapb.Keyspace, int64, error)

GetKeyspace is part of the topo.Server interface

func (*Server) GetKeyspaces

func (zkts *Server) GetKeyspaces(ctx context.Context) ([]string, error)

GetKeyspaces is part of the topo.Server interface

func (*Server) GetKnownCells

func (zkts *Server) GetKnownCells(ctx context.Context) ([]string, error)

GetKnownCells is part of the topo.Server interface

func (*Server) GetShard

func (zkts *Server) GetShard(ctx context.Context, keyspace, shard string) (*topodatapb.Shard, int64, error)

GetShard is part of the topo.Server interface

func (*Server) GetShardNames

func (zkts *Server) GetShardNames(ctx context.Context, keyspace string) ([]string, error)

GetShardNames is part of the topo.Server interface

func (*Server) GetShardReplication

func (zkts *Server) GetShardReplication(ctx context.Context, cell, keyspace, shard string) (*topo.ShardReplicationInfo, error)

GetShardReplication is part of the topo.Server interface

func (*Server) GetSrvKeyspace

func (zkts *Server) GetSrvKeyspace(ctx context.Context, cell, keyspace string) (*topodatapb.SrvKeyspace, error)

GetSrvKeyspace is part of the topo.Server interface

func (*Server) GetSrvKeyspaceNames

func (zkts *Server) GetSrvKeyspaceNames(ctx context.Context, cell string) ([]string, error)

GetSrvKeyspaceNames is part of the topo.Server interface

func (*Server) GetSrvVSchema

func (zkts *Server) GetSrvVSchema(ctx context.Context, cell string) (*vschemapb.SrvVSchema, error)

GetSrvVSchema is part of the topo.Server interface

func (*Server) GetTablet

func (zkts *Server) GetTablet(ctx context.Context, alias *topodatapb.TabletAlias) (*topodatapb.Tablet, int64, error)

GetTablet is part of the topo.Server interface

func (*Server) GetTabletsByCell

func (zkts *Server) GetTabletsByCell(ctx context.Context, cell string) ([]*topodatapb.TabletAlias, error)

GetTabletsByCell is part of the topo.Server interface

func (*Server) GetVSchema

func (zkts *Server) GetVSchema(ctx context.Context, keyspace string) (*vschemapb.Keyspace, error)

GetVSchema fetches the JSON vschema from the topo.

func (*Server) GetZConn

func (zkts *Server) GetZConn() zk.Conn

GetZConn returns the zookeeper connection for this Server.

func (*Server) ListDir

func (zkts *Server) ListDir(ctx context.Context, cell, dirPath string) ([]string, error)

ListDir is part of the topo.Backend interface.

func (*Server) LockKeyspaceForAction

func (zkts *Server) LockKeyspaceForAction(ctx context.Context, keyspace, contents string) (string, error)

LockKeyspaceForAction is part of topo.Server interface

func (*Server) LockShardForAction

func (zkts *Server) LockShardForAction(ctx context.Context, keyspace, shard, contents string) (string, error)

LockShardForAction is part of topo.Server interface

func (*Server) NewMasterParticipation

func (zkts *Server) NewMasterParticipation(name, id string) (topo.MasterParticipation, error)

NewMasterParticipation is part of the topo.Server interface

func (*Server) PruneActionLogs

func (zkts *Server) PruneActionLogs(zkActionLogPath string, keepCount int) (prunedCount int, err error)

PruneActionLogs prunes old actionlog entries. Returns how many entries were purged (even if there was an error).

There is a chance some processes might still be waiting for action results, but it is very very small.

func (*Server) PurgeActions

func (zkts *Server) PurgeActions(zkActionPath string, canBePurged func(data []byte) bool) error

PurgeActions removes all queued actions, leaving the action node itself in place.

This inherently breaks the locking mechanism of the action queue, so this is a rare cleanup action, not a normal part of the flow.

This can be used for tablets, shards and keyspaces.

func (*Server) SaveVSchema

func (zkts *Server) SaveVSchema(ctx context.Context, keyspace string, vschema *vschemapb.Keyspace) error

SaveVSchema saves the vschema into the topo.

func (*Server) UnlockKeyspaceForAction

func (zkts *Server) UnlockKeyspaceForAction(ctx context.Context, keyspace, lockPath, results string) error

UnlockKeyspaceForAction is part of topo.Server interface

func (*Server) UnlockShardForAction

func (zkts *Server) UnlockShardForAction(ctx context.Context, keyspace, shard, lockPath, results string) error

UnlockShardForAction is part of topo.Server interface

func (*Server) Update

func (zkts *Server) Update(ctx context.Context, cell, filePath string, contents []byte, version topo.Version) (topo.Version, error)

Update is part of the topo.Backend interface.

func (*Server) UpdateKeyspace

func (zkts *Server) UpdateKeyspace(ctx context.Context, keyspace string, value *topodatapb.Keyspace, existingVersion int64) (int64, error)

UpdateKeyspace is part of the topo.Server interface

func (*Server) UpdateShard

func (zkts *Server) UpdateShard(ctx context.Context, keyspace, shard string, value *topodatapb.Shard, existingVersion int64) (int64, error)

UpdateShard is part of the topo.Server interface

func (*Server) UpdateShardReplicationFields

func (zkts *Server) UpdateShardReplicationFields(ctx context.Context, cell, keyspace, shard string, update func(*topodatapb.ShardReplication) error) error

UpdateShardReplicationFields is part of the topo.Server interface

func (*Server) UpdateSrvKeyspace

func (zkts *Server) UpdateSrvKeyspace(ctx context.Context, cell, keyspace string, srvKeyspace *topodatapb.SrvKeyspace) error

UpdateSrvKeyspace is part of the topo.Server interface

func (*Server) UpdateSrvVSchema

func (zkts *Server) UpdateSrvVSchema(ctx context.Context, cell string, srvVSchema *vschemapb.SrvVSchema) error

UpdateSrvVSchema is part of the topo.Server interface

func (*Server) UpdateTablet

func (zkts *Server) UpdateTablet(ctx context.Context, tablet *topodatapb.Tablet, existingVersion int64) (int64, error)

UpdateTablet is part of the topo.Server interface

func (*Server) Watch

func (zkts *Server) Watch(ctx context.Context, cell, filePath string) (*topo.WatchData, <-chan *topo.WatchData, topo.CancelFunc)

Watch is part of the topo.Backend interface

type ZKVersion

type ZKVersion int32

ZKVersion is zookeeper's idea of a version. It implements topo.Version. We use the native zookeeper.Stat.Version type, int32.

func (ZKVersion) String

func (v ZKVersion) String() string

String is part of the topo.Version interface.

type ZkExplorer

type ZkExplorer struct {
	// contains filtered or unexported fields
}

ZkExplorer implements explorer.Explorer

func NewZkExplorer

func NewZkExplorer(zconn zk.Conn) *ZkExplorer

NewZkExplorer returns an Explorer implementation for Zookeeper

func (ZkExplorer) HandlePath

func (ex ZkExplorer) HandlePath(zkPath string, r *http.Request) *explorer.Result

HandlePath is part of the Explorer interface

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