zktopo

package
v2.0.0-rc.1+incompatible Latest Latest
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 Go to latest Published: Jun 7, 2016 License: BSD-3-Clause Imports: 16 Imported by: 0

Documentation

Index

Constants

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

Variables

View Source 
var WatchSleepDuration = 30 * time.Second

WatchSleepDuration is how many seconds interval to poll for in case the directory that contains a file to watch doesn't exist, or a watch is broken. It is exported so individual test and main programs can change it.

Functions

func NewServer 

func NewServer(zconn zk.Conn) topo.Impl

NewServer can be used to create a custom Server (for tests for instance) but it cannot change the globally registered one.

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.Server implementation.

func (*Server) Close 

func (zkts *Server) Close()

Close is part of topo.Server 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) 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) DeleteKeyspaceShards 

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

DeleteKeyspaceShards 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) 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) 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) 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 string) 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) 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) ValidateShard 

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

ValidateShard is part of the topo.Server interface

func (*Server) WatchSrvKeyspace 

func (zkts *Server) WatchSrvKeyspace(ctx context.Context, cell, keyspace string) (<-chan *topodatapb.SrvKeyspace, error)

WatchSrvKeyspace is part of the topo.Server interface

func (*Server) WatchSrvVSchema 

func (zkts *Server) WatchSrvVSchema(ctx context.Context, cell string) (<-chan *vschemapb.SrvVSchema, error)

WatchSrvVSchema is part of the topo.Server 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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