tabletserver

package
v2.0.0-alpha5+incompat... Latest Latest
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 Go to latest Published: Oct 23, 2015 License: BSD-3-Clause Imports: 61 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// QuerySourceRowcache means query result is found in rowcache.
	QuerySourceRowcache = 1 << iota
	// QuerySourceConsolidator means query result is found in consolidator.
	QuerySourceConsolidator
	// QuerySourceMySQL means query result is returned from MySQL.
	QuerySourceMySQL
)
View Source 
const (
	QRContinue = Action(iota)
	QRFail
	QRFailRetry
)

These are actions.

View Source 
const (
	QRNoOp = Operator(iota)
	QREqual
	QRNotEqual
	QRLessThan
	QRGreaterEqual
	QRGreaterThan
	QRLessEqual
	QRMatch
	QRNoMatch
	QRIn
	QRNotIn
)

These are comparison operators.

View Source 
const (
	QROK = iota
	QRMismatch
	QROutOfRange
)

These are return statii.

View Source 
const (
	// ErrFail is returned when a query fails, and we think it's because the query
	// itself is problematic. That means that the query will not  be retried.
	ErrFail = iota

	// ErrRetry is returned when a query can be retried
	ErrRetry

	// ErrFatal is returned when a query fails due to some internal state, but we
	// don't suspect the query itself to be bad. The query can be retried by VtGate
	// to a different VtTablet (in case a different tablet is healthier), but
	// probably shouldn't be retried by clients.
	ErrFatal

	// ErrTxPoolFull is returned when we can't get a connection
	ErrTxPoolFull

	// ErrNotInTx is returned when we're not in a transaction but should be
	ErrNotInTx
)
View Source 
const (
	// StateNotConnected is the state where tabletserver is not
	// connected to an underlying mysql instance.
	StateNotConnected = iota
	// StateNotServing is the state where tabletserver is connected
	// to an underlying mysql instance, but is not serving queries.
	StateNotServing
	// StateServing is where queries are allowed.
	StateServing
	// StateTransitioning is a transient state indicating that
	// the tabletserver is tranisitioning to a new state.
	StateTransitioning
	// StateShuttingDown is a transient state indicating that
	// the tabletserver is shutting down. This state differs from
	// StateTransitioning because we allow queries for transactions
	// that are still in flight.
	StateShuttingDown
)
View Source 
const (
	TxClose    = "close"
	TxCommit   = "commit"
	TxRollback = "rollback"
	TxKill     = "kill"
)

These consts identify how a transaction was resolved.

Variables

View Source 
var DefaultQsConfig = Config{
	PoolSize:             16,
	StreamPoolSize:       750,
	TransactionCap:       20,
	TransactionTimeout:   30,
	MaxResultSize:        10000,
	MaxDMLRows:           500,
	QueryCacheSize:       5000,
	SchemaReloadTime:     30 * 60,
	QueryTimeout:         0,
	TxPoolTimeout:        1,
	IdleTimeout:          30 * 60,
	StreamBufferSize:     32 * 1024,
	RowCache:             RowCacheConfig{Memory: -1, Connections: -1, Threads: -1},
	SpotCheckRatio:       0,
	StrictMode:           true,
	StrictTableAcl:       false,
	TerseErrors:          false,
	EnablePublishStats:   true,
	EnableAutoCommit:     false,
	EnableTableAclDryRun: false,
	StatsPrefix:          "",
	DebugURLPrefix:       "/debug",
	PoolNamePrefix:       "",
	TableAclExemptACL:    "",
}

DefaultQSConfig is the default value for the query service config.

The value for StreamBufferSize was chosen after trying out a few of them. Too small buffers force too many packets to be sent. Too big buffers force the clients to read them in multiple chunks and make memory copies. so with the encoding overhead, this seems to work great (the overhead makes the final packets on the wire about twice bigger than this).

View Source 
var ErrConnPoolClosed = NewTabletError(ErrFatal,

	vtrpc.ErrorCode_INTERNAL_ERROR,
	"connection pool is closed")

ErrConnPoolClosed is returned / panicked when the connection pool is closed.

View Source 
var RegisterFunctions []RegisterFunction

RegisterFunctions is a list of all the RegisterFunction that will be called upon Register() on a TabletServer

View Source 
var StatsLogger = streamlog.New("TabletServer", 50)

StatsLogger is the main stream logger object

View Source 
var TxLogger = streamlog.New("TxLog", 10)

TxLogger can be used to enable logging of transactions. Call TxLogger.ServeLogs in your main program to enable logging. The log format can be inferred by looking at TxConnection.Format.

Functions

func AddTabletError 

func AddTabletError(err error, replyErr **mproto.RPCError)

AddTabletError will update a mproto.RPCError with details from a TabletError.

func Init 

func Init()

Init must be called after flag.Parse, and before doing any other operations.

func IsConnErr 

func IsConnErr(err error) bool

IsConnErr returns true if the error is a connection error. If the error is of type TabletError or hasNumber, it checks the error code. Otherwise, it parses the string looking for (errno xxxx) and uses the extracted value to determine if it's a conn error.

func PrefixTabletError 

func PrefixTabletError(errorType int, errCode vtrpc.ErrorCode, err error, prefix string) error

PrefixTabletError attempts to add a string prefix to a TabletError, while preserving its ErrorType. If the given error is not a TabletError, a new TabletError is returned with the desired ErrorType.

func Rand 

func Rand() int64

Rand generates a pseudo-random int64 number.

func ToGRPCError 

func ToGRPCError(err error) error

ToGRPCError returns a TabletError as a grpc error, with the appropriate error code. This function lives here, instead of in vterrors, so that the vterrors package doesn't have to import tabletserver.

Types

type Action 

type Action int

Action speficies the list of actions to perform when a QueryRule is triggered.

type BindVarCond 

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

BindVarCond represents a bind var condition.

type CacheInvalidator 

type CacheInvalidator interface {
	Delete(key string)
}

CacheInvalidator provides the abstraction needed for an instant invalidation vs. delayed invalidation in the case of in-transaction dmls

type CachePool 

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

CachePool re-exposes ResourcePool as a pool of Memcache connection objects.

func NewCachePool 

func NewCachePool(
	name string,
	rowCacheConfig RowCacheConfig,
	idleTimeout time.Duration,
	statsURL string,
	enablePublishStats bool,
	queryServiceStats *QueryServiceStats) *CachePool

NewCachePool creates a new pool for rowcache connections.

func (*CachePool) Available 

func (cp *CachePool) Available() int64

Available returns the number of available connections in the pool.

func (*CachePool) Capacity 

func (cp *CachePool) Capacity() int64

Capacity returns the current capacity of the pool.

func (*CachePool) Close 

func (cp *CachePool) Close()

Close closes the CachePool. It also shuts down memcache. You can call Open again after Close.

func (*CachePool) Get 

func (cp *CachePool) Get(ctx context.Context) cacheservice.CacheService

Get returns a memcache connection from the pool. You must call Put after Get.

func (*CachePool) IdleTimeout 

func (cp *CachePool) IdleTimeout() time.Duration

IdleTimeout returns the connection idle timeout.

func (*CachePool) IsClosed 

func (cp *CachePool) IsClosed() bool

IsClosed returns true if CachePool is closed.

func (*CachePool) MaxCap 

func (cp *CachePool) MaxCap() int64

MaxCap returns the extent to which the pool capacity can be increased.

func (*CachePool) Open 

func (cp *CachePool) Open()

Open opens the pool. It launches memcache and waits till it's up.

func (*CachePool) Put 

func (cp *CachePool) Put(conn cacheservice.CacheService)

Put returns the connection to the pool.

func (*CachePool) ServeHTTP 

func (cp *CachePool) ServeHTTP(response http.ResponseWriter, request *http.Request)

ServeHTTP serves memcache stats as HTTP.

func (*CachePool) StatsJSON 

func (cp *CachePool) StatsJSON() string

StatsJSON returns a JSON version of the CachePool stats.

func (*CachePool) WaitCount 

func (cp *CachePool) WaitCount() int64

WaitCount returns the number of times we had to wait to get a connection from the pool.

func (*CachePool) WaitTime 

func (cp *CachePool) WaitTime() time.Duration

WaitTime returns the total amount of time spent waiting for a connection.

type Config 

type Config struct {
	PoolSize             int
	StreamPoolSize       int
	TransactionCap       int
	TransactionTimeout   float64
	MaxResultSize        int
	MaxDMLRows           int
	StreamBufferSize     int
	QueryCacheSize       int
	SchemaReloadTime     float64
	QueryTimeout         float64
	TxPoolTimeout        float64
	IdleTimeout          float64
	RowCache             RowCacheConfig
	SpotCheckRatio       float64
	StrictMode           bool
	StrictTableAcl       bool
	TerseErrors          bool
	EnablePublishStats   bool
	EnableAutoCommit     bool
	EnableTableAclDryRun bool
	StatsPrefix          string
	DebugURLPrefix       string
	PoolNamePrefix       string
	TableAclExemptACL    string
}

Config contains all the configuration for query service

type ConnPool 

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

ConnPool implements a custom connection pool for tabletserver. It's similar to dbconnpool.ConnPool, but the connections it creates come with built-in ability to kill in-flight queries. These connections also trigger a CheckMySQL call if we fail to connect to MySQL. Other than the connection type, ConnPool maintains an additional pool of dba connections that are used to kill connections.

func NewConnPool 

func NewConnPool(
	name string,
	capacity int,
	idleTimeout time.Duration,
	enablePublishStats bool,
	queryServiceStats *QueryServiceStats,
	checker MySQLChecker) *ConnPool

NewConnPool creates a new ConnPool. The name is used to publish stats only.

func (*ConnPool) Available 

func (cp *ConnPool) Available() int64

Available returns the number of available connections in the pool

func (*ConnPool) Capacity 

func (cp *ConnPool) Capacity() int64

Capacity returns the pool capacity.

func (*ConnPool) Close 

func (cp *ConnPool) Close()

Close will close the pool and wait for connections to be returned before exiting.

func (*ConnPool) Get 

func (cp *ConnPool) Get(ctx context.Context) (*DBConn, error)

Get returns a connection. You must call Recycle on DBConn once done.

func (*ConnPool) IdleTimeout 

func (cp *ConnPool) IdleTimeout() time.Duration

IdleTimeout returns the idle timeout for the pool.

func (*ConnPool) MaxCap 

func (cp *ConnPool) MaxCap() int64

MaxCap returns the maximum size of the pool

func (*ConnPool) Open 

func (cp *ConnPool) Open(appParams, dbaParams *sqldb.ConnParams)

Open must be called before starting to use the pool.

func (*ConnPool) Put 

func (cp *ConnPool) Put(conn *DBConn)

Put puts a connection into the pool.

func (*ConnPool) SetCapacity 

func (cp *ConnPool) SetCapacity(capacity int) (err error)

SetCapacity alters the size of the pool at runtime.

func (*ConnPool) SetIdleTimeout 

func (cp *ConnPool) SetIdleTimeout(idleTimeout time.Duration)

SetIdleTimeout sets the idleTimeout on the pool.

func (*ConnPool) StatsJSON 

func (cp *ConnPool) StatsJSON() string

StatsJSON returns the pool stats as a JSOn object.

func (*ConnPool) WaitCount 

func (cp *ConnPool) WaitCount() int64

WaitCount returns how many clients are waiting for a connection

func (*ConnPool) WaitTime 

func (cp *ConnPool) WaitTime() time.Duration

WaitTime return the pool WaitTime.

type Controller 

type Controller interface {
	// Register registers this query service with the RPC layer.
	Register()

	// AddStatusPart adds the status part to the status page
	AddStatusPart()

	// InitDBConfig sets up the db config vars.
	InitDBConfig(pb.Target, dbconfigs.DBConfigs, []SchemaOverride, mysqlctl.MysqlDaemon) error

	// SetServingType transitions the query service to the required serving type.
	SetServingType(tabletType topodata.TabletType, serving bool) error

	// IsServing returns true if the query service is running
	IsServing() bool

	// IsHealthy returns the health status of the QueryService
	IsHealthy() error

	// ClearQueryPlanCache clears internal query plan cache
	ClearQueryPlanCache()

	// ReloadSchema makes the quey service reload its schema cache
	ReloadSchema()

	// RegisterQueryRuleSource adds a query rule source
	RegisterQueryRuleSource(ruleSource string)

	// RegisterQueryRuleSource removes a query rule source
	UnRegisterQueryRuleSource(ruleSource string)

	// SetQueryRules sets the query rules for this QueryService
	SetQueryRules(ruleSource string, qrs *QueryRules) error

	// QueryService returns the QueryService object used by this Controller
	QueryService() queryservice.QueryService

	// BroadcastHealth sends the current health to all listeners
	BroadcastHealth(terTimestamp int64, stats *pb.RealtimeStats)
}

Controller defines the control interface for TabletServer.

type DBConn 

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

DBConn is a db connection for tabletserver. It performs automatic reconnects as needed. Its Execute function has a timeout that can kill its own queries and the underlying connection. It will also trigger a CheckMySQL whenever applicable.

func NewDBConn 

func NewDBConn(
	cp *ConnPool,
	appParams,
	dbaParams *sqldb.ConnParams,
	qStats *QueryServiceStats) (*DBConn, error)

NewDBConn creates a new DBConn. It triggers a CheckMySQL if creation fails.

func (*DBConn) Close 

func (dbc *DBConn) Close()

Close closes the DBConn.

func (*DBConn) Current 

func (dbc *DBConn) Current() string

Current returns the currently executing query.

func (*DBConn) Exec 

func (dbc *DBConn) Exec(ctx context.Context, query string, maxrows int, wantfields bool) (*mproto.QueryResult, error)

Exec executes the specified query. If there is a connection error, it will reconnect and retry. A failed reconnect will trigger a CheckMySQL.

func (*DBConn) ExecOnce 

func (dbc *DBConn) ExecOnce(ctx context.Context, query string, maxrows int, wantfields bool) (*mproto.QueryResult, error)

ExecOnce executes the specified query, but does not retry on connection errors.

func (*DBConn) ID 

func (dbc *DBConn) ID() int64

ID returns the connection id.

func (*DBConn) IsClosed 

func (dbc *DBConn) IsClosed() bool

IsClosed returns true if DBConn is closed.

func (*DBConn) Kill 

func (dbc *DBConn) Kill() error

Kill kills the currently executing query both on MySQL side and on the connection side. If no query is executing, it's a no-op. Kill will also not kill a query more than once.

func (*DBConn) Recycle 

func (dbc *DBConn) Recycle()

Recycle returns the DBConn to the pool.

func (*DBConn) Stream 

func (dbc *DBConn) Stream(ctx context.Context, query string, callback func(*mproto.QueryResult) error, streamBufferSize int) error

Stream executes the query and streams the results.

func (*DBConn) VerifyStrict 

func (dbc *DBConn) VerifyStrict() bool

VerifyStrict returns true if MySQL is in STRICT mode.

type DirtyKeys 

type DirtyKeys map[string]bool

DirtyKeys provides a cache-like interface, where it just adds keys to its likst as Delete gets called.

func (DirtyKeys) Delete 

func (dk DirtyKeys) Delete(key string)

Delete just keeps track of what needs to be deleted

type ExecPlan 

type ExecPlan struct {
	*planbuilder.ExecPlan
	TableInfo  *TableInfo
	Fields     []mproto.Field
	Rules      *QueryRules
	Authorized *tableacl.ACLResult

	QueryCount int64
	Time       time.Duration
	RowCount   int64
	ErrorCount int64
	// contains filtered or unexported fields
}

ExecPlan wraps the planbuilder's exec plan to enforce additional rules and track stats.

func (*ExecPlan) AddStats 

func (ep *ExecPlan) AddStats(queryCount int64, duration time.Duration, rowCount, errorCount int64)

AddStats updates the stats for the current ExecPlan.

func (*ExecPlan) Size 

func (*ExecPlan) Size() int

Size allows ExecPlan to be in cache.LRUCache.

func (*ExecPlan) Stats 

func (ep *ExecPlan) Stats() (queryCount int64, duration time.Duration, rowCount, errorCount int64)

Stats returns the current stats of ExecPlan.

type LogStats 

type LogStats struct {
	Method        string
	PlanType      string
	OriginalSQL   string
	BindVariables map[string]interface{}

	RowsAffected         int
	NumberOfQueries      int
	StartTime            time.Time
	EndTime              time.Time
	MysqlResponseTime    time.Duration
	WaitingForConnection time.Duration
	CacheHits            int64
	CacheAbsent          int64
	CacheMisses          int64
	CacheInvalidations   int64
	QuerySources         byte
	Rows                 [][]sqltypes.Value
	TransactionID        int64

	Error *TabletError
	// contains filtered or unexported fields
}

LogStats records the stats for a single query

func (*LogStats) AddRewrittenSQL 

func (stats *LogStats) AddRewrittenSQL(sql string, start time.Time)

AddRewrittenSQL adds a single sql statement to the rewritten list

func (*LogStats) ContextHTML 

func (stats *LogStats) ContextHTML() template.HTML

ContextHTML returns the HTML version of the context that was used, or "". This is a method on LogStats instead of a field so that it doesn't need to be passed by value everywhere.

func (*LogStats) EffectiveCaller 

func (stats *LogStats) EffectiveCaller() string

EffectiveCaller returns the effective caller stored in LogStats.ctx

func (*LogStats) ErrorStr 

func (stats *LogStats) ErrorStr() string

ErrorStr returns the error string or ""

func (*LogStats) EventTime 

func (stats *LogStats) EventTime() time.Time

EventTime returns the time the event was created.

func (*LogStats) FmtBindVariables 

func (stats *LogStats) FmtBindVariables(full bool) string

FmtBindVariables returns the map of bind variables as JSON. For values that are strings or byte slices it only reports their type and length.

func (*LogStats) FmtQuerySources 

func (stats *LogStats) FmtQuerySources() string

FmtQuerySources returns a comma separated list of query sources. If there were no query sources, it returns the string "none".

func (*LogStats) Format 

func (stats *LogStats) Format(params url.Values) string

Format returns a tab separated list of logged fields.

func (*LogStats) ImmediateCaller 

func (stats *LogStats) ImmediateCaller() string

ImmediateCaller returns the immediate caller stored in LogStats.ctx

func (*LogStats) RemoteAddrUsername 

func (stats *LogStats) RemoteAddrUsername() (string, string)

RemoteAddrUsername returns some parts of CallInfo if set

func (*LogStats) RewrittenSQL 

func (stats *LogStats) RewrittenSQL() string

RewrittenSQL returns a semicolon separated list of SQL statements that were executed.

func (*LogStats) Send 

func (stats *LogStats) Send()

Send finalizes a record and sends it

func (*LogStats) SizeOfResponse 

func (stats *LogStats) SizeOfResponse() int

SizeOfResponse returns the approximate size of the response in bytes (this does not take in account BSON encoding). It will return 0 for streaming requests.

func (*LogStats) TotalTime 

func (stats *LogStats) TotalTime() time.Duration

TotalTime returns how long this query has been running

type MemcacheStats 

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

MemcacheStats exports the Memcache internal stats through stats package.

func NewMemcacheStats 

func NewMemcacheStats(
	statsPrefix string,
	refreshFreq time.Duration,
	flags int64,
	queryServiceStats *QueryServiceStats,
	statsFunc RetrieveCacheStats) *MemcacheStats

NewMemcacheStats creates a new MemcacheStats. main, slabs and items specify the categories of stats that need to be exported.

func (*MemcacheStats) Close 

func (memstats *MemcacheStats) Close()

Close clears the variable values and stops exporting the stats.

func (*MemcacheStats) Open 

func (memstats *MemcacheStats) Open()

Open starts exporting the stats.

type MySQLChecker 

type MySQLChecker interface {
	CheckMySQL()
}

MySQLChecker defines the CheckMySQL interface that lower level objects can use to call back into TabletServer.

type Operator 

type Operator int

Operator represents the list of operators.

func MapStrOperator 

func MapStrOperator(strop string) (op Operator, err error)

MapStrOperator maps a string representation to an Operator.

type QueryDetail 

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

QueryDetail is a simple wrapper for Query, Context and a killable conn.

func NewQueryDetail 

func NewQueryDetail(ctx context.Context, conn killable) *QueryDetail

NewQueryDetail creates a new QueryDetail

type QueryDetailzRow 

type QueryDetailzRow struct {
	Query             string
	ContextHTML       template.HTML
	Start             time.Time
	Duration          time.Duration
	ConnID            int64
	State             string
	ShowTerminateLink bool
}

QueryDetailzRow is used for rendering QueryDetail in a template

type QueryEngine 

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

QueryEngine implements the core functionality of tabletserver. It assumes that no requests will be sent to it before Open is called and succeeds. Shutdown is done in the following order:

WaitForTxEmpty: There should be no more new calls to Begin once this function is called. This will return when there are no more pending transactions.

Close: There should be no more pending queries when this function is called.

Functions of QueryEngine do not return errors. They instead panic with NewTabletError as the error type. TODO(sougou): Switch to error return scheme.

func NewQueryEngine 

func NewQueryEngine(checker MySQLChecker, config Config) *QueryEngine

NewQueryEngine creates a new QueryEngine. This is a singleton class. You must call this only once.

func (*QueryEngine) ClearRowcache 

func (qe *QueryEngine) ClearRowcache(ctx context.Context) error

ClearRowcache invalidates all items in the rowcache.

func (*QueryEngine) Close 

func (qe *QueryEngine) Close()

Close must be called to shut down QueryEngine. You must ensure that no more queries will be sent before calling Close.

func (*QueryEngine) Commit 

func (qe *QueryEngine) Commit(ctx context.Context, logStats *LogStats, transactionID int64)

Commit commits the specified transaction.

func (*QueryEngine) IsMySQLReachable 

func (qe *QueryEngine) IsMySQLReachable() bool

IsMySQLReachable returns true if we can connect to MySQL.

func (*QueryEngine) Launch 

func (qe *QueryEngine) Launch(f func())

Launch launches the specified function inside a goroutine. If Close or WaitForTxEmpty is called while a goroutine is running, QueryEngine will not return until the existing functions have completed. This functionality allows us to launch tasks with the assurance that the QueryEngine will not be closed underneath us.

func (*QueryEngine) Open 

func (qe *QueryEngine) Open(dbconfigs dbconfigs.DBConfigs, schemaOverrides []SchemaOverride)

Open must be called before sending requests to QueryEngine.

func (*QueryEngine) WaitForTxEmpty 

func (qe *QueryEngine) WaitForTxEmpty()

WaitForTxEmpty must be called before calling Close. Before calling WaitForTxEmpty, you must ensure that there will be no more calls to Begin.

type QueryExecutor 

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

QueryExecutor is used for executing a query request.

func (*QueryExecutor) Execute 

func (qre *QueryExecutor) Execute() (reply *mproto.QueryResult, err error)

Execute performs a non-streaming query execution.

func (*QueryExecutor) Stream 

func (qre *QueryExecutor) Stream(sendReply func(*mproto.QueryResult) error) error

Stream performs a streaming query execution.

type QueryList 

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

QueryList holds a thread safe list of QueryDetails

func NewQueryList 

func NewQueryList() *QueryList

NewQueryList creates a new QueryList

func (*QueryList) Add 

func (ql *QueryList) Add(qd *QueryDetail)

Add adds a QueryDetail to QueryList

func (*QueryList) GetQueryzRows 

func (ql *QueryList) GetQueryzRows() []QueryDetailzRow

GetQueryzRows returns a list of QueryDetailzRow sorted by start time

func (*QueryList) Remove 

func (ql *QueryList) Remove(qd *QueryDetail)

Remove removes a QueryDetail from QueryList

func (*QueryList) Terminate 

func (ql *QueryList) Terminate(connID int64) error

Terminate updates the query status and kills the connection

func (*QueryList) TerminateAll 

func (ql *QueryList) TerminateAll()

TerminateAll terminates all queries and kills the MySQL connections

type QueryRule 

type QueryRule struct {
	Description string
	Name        string
	// contains filtered or unexported fields
}

QueryRule represents one rule (conditions-action). Name is meant to uniquely identify a rule. Description is a human readable comment that describes the rule. For a QueryRule to fire, all conditions of the QueryRule have to match. For example, an empty QueryRule will match all requests. Every QueryRule has an associated Action. If all the conditions of the QueryRule are met, then the Action is triggerred.

func BuildQueryRule 

func BuildQueryRule(ruleInfo map[string]interface{}) (qr *QueryRule, err error)

BuildQueryRule builds a query rule from a ruleInfo.

func NewQueryRule 

func NewQueryRule(description, name string, act Action) (qr *QueryRule)

NewQueryRule creates a new QueryRule.

func (*QueryRule) AddBindVarCond 

func (qr *QueryRule) AddBindVarCond(name string, onAbsent, onMismatch bool, op Operator, value interface{}) error

AddBindVarCond adds a bind variable restriction to the QueryRule. All bind var conditions have to be satisfied for the QueryRule to be a match. name represents the name (not regexp) of the bind variable. onAbsent specifies the value of the condition if the bind variable is absent. onMismatch specifies the value of the condition if there's a type mismatch on the condition. For inequalities, the bindvar is the left operand and the value in the condition is the right operand: bindVar Operator value. Value & operator rules Type Operators Bindvar nil NOOP any type uint64 EQ, NE, LT, GE, GT, LE whole numbers int64 EQ, NE, LT, GE, GT, LE whole numbers string EQ, NE, LT, GE, GT, LE, MATCH, NOMATCH []byte, string KeyRange IN, NOTIN whole numbers whole numbers can be: int, int8, int16, int32, int64, uint64

func (*QueryRule) AddPlanCond 

func (qr *QueryRule) AddPlanCond(planType planbuilder.PlanType)

AddPlanCond adds to the list of plans that can be matched for the rule to fire. This function acts as an OR: Any plan id match is considered a match.

func (*QueryRule) AddTableCond 

func (qr *QueryRule) AddTableCond(tableName string)

AddTableCond adds to the list of tableNames that can be matched for the rule to fire. This function acts as an OR: Any tableName match is considered a match.

func (*QueryRule) Copy 

func (qr *QueryRule) Copy() (newqr *QueryRule)

Copy performs a deep copy of a QueryRule.

func (*QueryRule) SetIPCond 

func (qr *QueryRule) SetIPCond(pattern string) (err error)

SetIPCond adds a regular expression condition for the client IP. It has to be a full match (not substring).

func (*QueryRule) SetQueryCond 

func (qr *QueryRule) SetQueryCond(pattern string) (err error)

SetQueryCond adds a regular expression condition for the query.

func (*QueryRule) SetUserCond 

func (qr *QueryRule) SetUserCond(pattern string) (err error)

SetUserCond adds a regular expression condition for the user name used by the client.

type QueryRuleInfo 

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

QueryRuleInfo is the maintainer of QueryRules from multiple sources

func NewQueryRuleInfo 

func NewQueryRuleInfo() *QueryRuleInfo

NewQueryRuleInfo returns an empty QueryRuleInfo object for use

func (*QueryRuleInfo) GetRules 

func (qri *QueryRuleInfo) GetRules(ruleSource string) (*QueryRules, error)

GetRules returns the corresponding QueryRules as designated by ruleSource parameter

func (*QueryRuleInfo) RegisterQueryRuleSource 

func (qri *QueryRuleInfo) RegisterQueryRuleSource(ruleSource string)

RegisterQueryRuleSource registers a query rule source name with QueryRuleInfo

func (*QueryRuleInfo) SetRules 

func (qri *QueryRuleInfo) SetRules(ruleSource string, newRules *QueryRules) error

SetRules takes an external QueryRules structure and overwrite one of the internal QueryRules as designated by ruleSource parameter

func (*QueryRuleInfo) UnRegisterQueryRuleSource 

func (qri *QueryRuleInfo) UnRegisterQueryRuleSource(ruleSource string)

UnRegisterQueryRuleSource removes a registered query rule source name

type QueryRules 

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

QueryRules is used to store and execute rules for the tabletserver.

func NewQueryRules 

func NewQueryRules() *QueryRules

NewQueryRules creates a new QueryRules.

func (*QueryRules) Add 

func (qrs *QueryRules) Add(qr *QueryRule)

Add adds a QueryRule to QueryRules. It does not check for duplicates.

func (*QueryRules) Append 

func (qrs *QueryRules) Append(otherqrs *QueryRules)

Append merges the rules from another QueryRules into the receiver

func (*QueryRules) Copy 

func (qrs *QueryRules) Copy() (newqrs *QueryRules)

Copy performs a deep copy of QueryRules. A nil input produces a nil output.

func (*QueryRules) Delete 

func (qrs *QueryRules) Delete(name string) (qr *QueryRule)

Delete deletes a QueryRule by name and returns the rule that was deleted. It returns nil if the rule was not found.

func (*QueryRules) Find 

func (qrs *QueryRules) Find(name string) (qr *QueryRule)

Find finds the first occurrence of a QueryRule by matching the Name field. It returns nil if the rule was not found.

func (*QueryRules) UnmarshalJSON 

func (qrs *QueryRules) UnmarshalJSON(data []byte) (err error)

UnmarshalJSON unmarshals QueryRules.

type QueryServiceStats 

type QueryServiceStats struct {
	// MySQLStats shows the time histogram for operations spent on mysql side.
	MySQLStats *stats.Timings
	// QueryStats shows the time histogram for each type of queries.
	QueryStats *stats.Timings
	// WaitStats shows the time histogram for wait operations
	WaitStats *stats.Timings
	// KillStats shows number of connections being killed.
	KillStats *stats.Counters
	// InfoErrors shows number of various non critical errors happened.
	InfoErrors *stats.Counters
	// ErrorStats shows number of critial erros happened.
	ErrorStats *stats.Counters
	// InternalErros shows number of errors from internal components.
	InternalErrors *stats.Counters
	// UserTableQueryCount shows number of queries received for each CallerID/table combination.
	UserTableQueryCount *stats.MultiCounters
	// UserTableQueryTimesNs shows total latency for each CallerID/table combination.
	UserTableQueryTimesNs *stats.MultiCounters
	// UserTransactionCount shows number of transactions received for each CallerID.
	UserTransactionCount *stats.MultiCounters
	// UserTransactionTimesNs shows total transaction latency for each CallerID.
	UserTransactionTimesNs *stats.MultiCounters
	// QPSRates shows the qps.
	QPSRates *stats.Rates
	// ResultStats shows the histogram of number of rows returned.
	ResultStats *stats.Histogram
	// SpotCheckCount shows the number of spot check events happened.
	SpotCheckCount *stats.Int
}

QueryServiceStats contains stats that used in queryservice level.

func NewQueryServiceStats 

func NewQueryServiceStats(statsPrefix string, enablePublishStats bool) *QueryServiceStats

NewQueryServiceStats returns a new QueryServiceStats instance.

type QuerySplitter 

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

QuerySplitter splits a BoundQuery into equally sized smaller queries. QuerySplits are generated by adding primary key range clauses to the original query. Only a limited set of queries are supported, see QuerySplitter.validateQuery() for details. Also, the table must have at least one primary key and the leading primary key must be numeric, see QuerySplitter.splitBoundaries()

func NewQuerySplitter 

func NewQuerySplitter(
	query *proto.BoundQuery,
	splitColumn string,
	splitCount int,
	schemaInfo *SchemaInfo) *QuerySplitter

NewQuerySplitter creates a new QuerySplitter. query is the original query to split and splitCount is the desired number of splits. splitCount must be a positive int, if not it will be set to 1.

type RCResult 

type RCResult struct {
	Row []sqltypes.Value
	Cas uint64
}

RCResult represents the result of a cache multi-fetch.

type RegisterFunction 

type RegisterFunction func(Controller)

RegisterFunction is a callback type to be called when we Register() a TabletServer

type RetrieveCacheStats 

type RetrieveCacheStats func(key string) string

RetrieveCacheStats returns current memcache stats.

type RowCache 

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

RowCache gives a table-level view into the rowcache.

func NewRowCache 

func NewRowCache(tableInfo *TableInfo, cachePool *CachePool) *RowCache

NewRowCache creates a new RowCache.

func (*RowCache) Delete 

func (rc *RowCache) Delete(ctx context.Context, key string)

Delete marks the row as deleted.

func (*RowCache) Get 

func (rc *RowCache) Get(ctx context.Context, keys []string) (results map[string]RCResult)

Get fetches the values for the specified keys.

func (*RowCache) Set 

func (rc *RowCache) Set(ctx context.Context, key string, row []sqltypes.Value, cas uint64)

Set pushes the specified row into the rowcache.

type RowCacheConfig 

type RowCacheConfig struct {
	Enabled     bool
	Binary      string
	Memory      int
	Socket      string
	Connections int
	Threads     int
	LockPaged   bool
	StatsPrefix string
}

RowCacheConfig encapsulates the configuration for RowCache

func (*RowCacheConfig) GetSubprocessFlags 

func (c *RowCacheConfig) GetSubprocessFlags(socket string) []string

GetSubprocessFlags returns the flags to use to call memcached

type RowcacheInvalidator 

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

RowcacheInvalidator runs the service to invalidate the rowcache based on binlog events.

func NewRowcacheInvalidator 

func NewRowcacheInvalidator(statsPrefix string, checker MySQLChecker, qe *QueryEngine, enablePublishStats bool) *RowcacheInvalidator

NewRowcacheInvalidator creates a new RowcacheInvalidator. Just like QueryEngine, this is a singleton class. You must call this only once.

func (*RowcacheInvalidator) AppendGTID 

func (rci *RowcacheInvalidator) AppendGTID(gtid myproto.GTID)

AppendGTID updates the current replication position by appending a GTID to the set of transactions that have been processed.

func (*RowcacheInvalidator) Close 

func (rci *RowcacheInvalidator) Close()

Close terminates the invalidation loop. It returns only of the loop has terminated.

func (*RowcacheInvalidator) Open 

func (rci *RowcacheInvalidator) Open(dbname string, mysqld mysqlctl.MysqlDaemon)

Open runs the invalidation loop.

func (*RowcacheInvalidator) Position 

func (rci *RowcacheInvalidator) Position() myproto.ReplicationPosition

Position returns the current ReplicationPosition.

func (*RowcacheInvalidator) PositionString 

func (rci *RowcacheInvalidator) PositionString() string

PositionString returns the current ReplicationPosition as a string.

func (*RowcacheInvalidator) SetPosition 

func (rci *RowcacheInvalidator) SetPosition(rp myproto.ReplicationPosition)

SetPosition sets the current ReplicationPosition.

type SchemaInfo 

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

SchemaInfo stores the schema info and performs operations that keep itself and the rowcache up-to-date.

func NewSchemaInfo 

func NewSchemaInfo(
	statsPrefix string,
	checker MySQLChecker,
	queryCacheSize int,
	reloadTime time.Duration,
	idleTimeout time.Duration,
	cachePool *CachePool,
	endpoints map[string]string,
	enablePublishStats bool,
	queryServiceStats *QueryServiceStats) *SchemaInfo

NewSchemaInfo creates a new SchemaInfo.

func (*SchemaInfo) ClearQueryPlanCache 

func (si *SchemaInfo) ClearQueryPlanCache()

ClearQueryPlanCache should be called if query plan cache is potentially obsolete

func (*SchemaInfo) Close 

func (si *SchemaInfo) Close()

Close shuts down SchemaInfo. It can be re-opened after Close.

func (*SchemaInfo) CreateOrUpdateTable 

func (si *SchemaInfo) CreateOrUpdateTable(ctx context.Context, tableName string)

CreateOrUpdateTable must be called if a DDL was applied to that table.

func (*SchemaInfo) DropTable 

func (si *SchemaInfo) DropTable(tableName string)

DropTable must be called if a table was dropped.

func (*SchemaInfo) GetPlan 

func (si *SchemaInfo) GetPlan(ctx context.Context, logStats *LogStats, sql string) *ExecPlan

GetPlan returns the ExecPlan that for the query. Plans are cached in a cache.LRUCache.

func (*SchemaInfo) GetSchema 

func (si *SchemaInfo) GetSchema() []*schema.Table

GetSchema returns a copy of the schema.

func (*SchemaInfo) GetStreamPlan 

func (si *SchemaInfo) GetStreamPlan(sql string) *ExecPlan

GetStreamPlan is similar to GetPlan, but doesn't use the cache and doesn't enforce a limit. It just returns the parsed query.

func (*SchemaInfo) GetTable 

func (si *SchemaInfo) GetTable(tableName string) *TableInfo

GetTable returns the TableInfo for a table.

func (*SchemaInfo) Open 

func (si *SchemaInfo) Open(appParams, dbaParams *sqldb.ConnParams, schemaOverrides []SchemaOverride, strictMode bool)

Open initializes the current SchemaInfo for service by loading the necessary info from the specified database.

func (*SchemaInfo) QueryCacheCap 

func (si *SchemaInfo) QueryCacheCap() int

QueryCacheCap returns the capacity of the query cache.

func (*SchemaInfo) Reload 

func (si *SchemaInfo) Reload()

Reload reloads the schema info from the db. Any tables that have changed since the last load are updated.

func (*SchemaInfo) ReloadTime 

func (si *SchemaInfo) ReloadTime() time.Duration

ReloadTime returns schema info reload time.

func (*SchemaInfo) ServeHTTP 

func (si *SchemaInfo) ServeHTTP(response http.ResponseWriter, request *http.Request)

func (*SchemaInfo) SetQueryCacheCap 

func (si *SchemaInfo) SetQueryCacheCap(size int)

SetQueryCacheCap sets the query cache capacity.

func (*SchemaInfo) SetReloadTime 

func (si *SchemaInfo) SetReloadTime(reloadTime time.Duration)

SetReloadTime changes how often the schema is reloaded. This call also triggers an immediate reload.

type SchemaOverride 

type SchemaOverride struct {
	Name      string
	PKColumns []string
	Cache     *struct {
		Type  string
		Table string
	}
}

SchemaOverride is a way to specify how the schema loaded by SchemaInfo must be overridden. Name is the name of the table, PKColumns specifies the new prmiary keys. Cache.Type specifies the rowcache operation for the table. It can be "R", which is read-only, or "RW" for read-write, and Table specifies the rowcache table to operate on. The purpose of this override is mainly to allow views to benefit from the rowcache. It has its downsides. Use carefully.

type TableInfo 

type TableInfo struct {
	*schema.Table
	Cache *RowCache
	// contains filtered or unexported fields
}

TableInfo contains the tabletserver related info for a table. It's a superset of schema.Table.

func NewTableInfo 

func NewTableInfo(conn *DBConn, tableName string, tableType string, comment string, cachePool *CachePool) (ti *TableInfo, err error)

NewTableInfo creates a new TableInfo.

func (*TableInfo) SetPK 

func (ti *TableInfo) SetPK(colnames []string) error

SetPK sets the pk columns for a TableInfo.

func (*TableInfo) Stats 

func (ti *TableInfo) Stats() (hits, absent, misses, invalidations int64)

Stats returns the stats for TableInfo.

func (*TableInfo) StatsJSON 

func (ti *TableInfo) StatsJSON() string

StatsJSON retuns a JSON representation of the TableInfo stats.

type TabletError 

type TabletError struct {
	ErrorType int
	Message   string
	SQLError  int
	// ErrorCode will be used to transmit the error across RPC boundaries
	ErrorCode vtrpc.ErrorCode
}

TabletError is the error type we use in this library

func NewTabletError 

func NewTabletError(errorType int, errCode vtrpc.ErrorCode, format string, args ...interface{}) *TabletError

NewTabletError returns a TabletError of the given type

func NewTabletErrorSQL 

func NewTabletErrorSQL(errorType int, errCode vtrpc.ErrorCode, err error) *TabletError

NewTabletErrorSQL returns a TabletError based on the error

func (*TabletError) Error 

func (te *TabletError) Error() string

func (*TabletError) Prefix 

func (te *TabletError) Prefix() string

Prefix returns the prefix for the error, like error, fatal, etc.

func (*TabletError) RecordStats 

func (te *TabletError) RecordStats(queryServiceStats *QueryServiceStats)

RecordStats will record the error in the proper stat bucket

func (*TabletError) VtErrorCode 

func (te *TabletError) VtErrorCode() vtrpc.ErrorCode

VtErrorCode returns the underlying Vitess error code

type TabletServer 

type TabletServer struct {
	QueryTimeout sync2.AtomicDuration
	BeginTimeout sync2.AtomicDuration
	// contains filtered or unexported fields
}

TabletServer implements the RPC interface for the query service.

func NewServer 

func NewServer() *TabletServer

NewServer creates a new TabletServer based on the command line flags.

func NewTabletServer 

func NewTabletServer(config Config) *TabletServer

NewTabletServer creates an instance of TabletServer. Only one instance of TabletServer can be created per process.

func (*TabletServer) AddStatusPart 

func (tsv *TabletServer) AddStatusPart()

AddStatusPart registers the status part for the status page.

func (*TabletServer) Begin 

func (tsv *TabletServer) Begin(ctx context.Context, target *pb.Target, session *proto.Session, txInfo *proto.TransactionInfo) (err error)

Begin starts a new transaction. This is allowed only if the state is StateServing.

func (*TabletServer) BroadcastHealth 

func (tsv *TabletServer) BroadcastHealth(terTimestamp int64, stats *pb.RealtimeStats)

BroadcastHealth will broadcast the current health to all listeners

func (*TabletServer) CheckMySQL 

func (tsv *TabletServer) CheckMySQL()

CheckMySQL initiates a check to see if MySQL is reachable. If not, it shuts down the query service. The check is rate-limited to no more than once per second.

func (*TabletServer) ClearQueryPlanCache 

func (tsv *TabletServer) ClearQueryPlanCache()

ClearQueryPlanCache clears internal query plan cache

func (*TabletServer) Commit 

func (tsv *TabletServer) Commit(ctx context.Context, target *pb.Target, session *proto.Session) (err error)

Commit commits the specified transaction.

func (*TabletServer) Execute 

func (tsv *TabletServer) Execute(ctx context.Context, target *pb.Target, query *proto.Query, reply *mproto.QueryResult) (err error)

Execute executes the query and returns the result as response.

func (*TabletServer) ExecuteBatch 

func (tsv *TabletServer) ExecuteBatch(ctx context.Context, target *pb.Target, queryList *proto.QueryList, reply *proto.QueryResultList) (err error)

ExecuteBatch executes a group of queries and returns their results as a list. ExecuteBatch can be called for an existing transaction, or it can be called with the AsTransaction flag which will execute all statements inside an independent transaction. If AsTransaction is true, TransactionId must be 0.

func (*TabletServer) GetSessionId 

func (tsv *TabletServer) GetSessionId(sessionParams *proto.SessionParams, sessionInfo *proto.SessionInfo) error

GetSessionId returns a sessionInfo response if the state is StateServing.

func (*TabletServer) GetState 

func (tsv *TabletServer) GetState() string

GetState returns the name of the current TabletServer state.

func (*TabletServer) HandlePanic 

func (tsv *TabletServer) HandlePanic(err *error)

HandlePanic is part of the queryservice.QueryService interface

func (*TabletServer) InitDBConfig 

func (tsv *TabletServer) InitDBConfig(target pb.Target, dbconfigs dbconfigs.DBConfigs, schemaOverrides []SchemaOverride, mysqld mysqlctl.MysqlDaemon) error

InitDBConfig inititalizes the db config variables for TabletServer. You must call this function before calling StartService or SetServingType.

func (*TabletServer) IsHealthy 

func (tsv *TabletServer) IsHealthy() error

IsHealthy returns nil if the query service is healthy (able to connect to the database and serving traffic) or an error explaining the unhealthiness otherwise.

func (*TabletServer) IsServing 

func (tsv *TabletServer) IsServing() bool

IsServing returns true if TabletServer is in SERVING state.

func (*TabletServer) MaxDMLRows 

func (tsv *TabletServer) MaxDMLRows() int

MaxDMLRows returns the max result size.

func (*TabletServer) MaxResultSize 

func (tsv *TabletServer) MaxResultSize() int

MaxResultSize returns the max result size.

func (*TabletServer) PoolSize 

func (tsv *TabletServer) PoolSize() int

PoolSize returns the pool size.

func (*TabletServer) QueryCacheCap 

func (tsv *TabletServer) QueryCacheCap() int

QueryCacheCap returns the pool size.

func (*TabletServer) QueryService 

func (tsv *TabletServer) QueryService() queryservice.QueryService

QueryService returns the QueryService part of TabletServer.

func (*TabletServer) Register 

func (tsv *TabletServer) Register()

Register prepares TabletServer for serving by calling all the registrations functions.

func (*TabletServer) RegisterQueryRuleSource 

func (tsv *TabletServer) RegisterQueryRuleSource(ruleSource string)

RegisterQueryRuleSource registers ruleSource for setting query rules.

func (*TabletServer) ReloadSchema 

func (tsv *TabletServer) ReloadSchema()

ReloadSchema reloads the schema. If the query service is not running, it's a no-op.

func (*TabletServer) Rollback 

func (tsv *TabletServer) Rollback(ctx context.Context, target *pb.Target, session *proto.Session) (err error)

Rollback rollsback the specified transaction.

func (*TabletServer) SetAutoCommit 

func (tsv *TabletServer) SetAutoCommit(auto bool)

SetAutoCommit sets autocommit on or off.

func (*TabletServer) SetMaxDMLRows 

func (tsv *TabletServer) SetMaxDMLRows(val int)

SetMaxDMLRows changes the max result size to the specified value.

func (*TabletServer) SetMaxResultSize 

func (tsv *TabletServer) SetMaxResultSize(val int)

SetMaxResultSize changes the max result size to the specified value.

func (*TabletServer) SetPoolSize 

func (tsv *TabletServer) SetPoolSize(val int)

SetPoolSize changes the pool size to the specified value.

func (*TabletServer) SetQueryCacheCap 

func (tsv *TabletServer) SetQueryCacheCap(val int)

SetQueryCacheCap changes the pool size to the specified value.

func (*TabletServer) SetQueryRules 

func (tsv *TabletServer) SetQueryRules(ruleSource string, qrs *QueryRules) error

SetQueryRules sets the query rules for a registered ruleSource.

func (*TabletServer) SetServingType 

func (tsv *TabletServer) SetServingType(tabletType topodata.TabletType, serving bool) error

SetServingType changes the serving type of the tabletserver. It starts or stops internal services as deemed necessary.

func (*TabletServer) SetSpotCheckRatio 

func (tsv *TabletServer) SetSpotCheckRatio(val float64)

SetSpotCheckRatio sets the spot check ration.

func (*TabletServer) SetStreamPoolSize 

func (tsv *TabletServer) SetStreamPoolSize(val int)

SetStreamPoolSize changes the pool size to the specified value.

func (*TabletServer) SetStrictMode 

func (tsv *TabletServer) SetStrictMode(strict bool)

SetStrictMode sets strict mode on or off.

func (*TabletServer) SetTxPoolSize 

func (tsv *TabletServer) SetTxPoolSize(val int)

SetTxPoolSize changes the tx pool size to the specified value.

func (*TabletServer) SetTxTimeout 

func (tsv *TabletServer) SetTxTimeout(val time.Duration)

SetTxTimeout changes the transaction timeout to the specified value.

func (*TabletServer) SplitQuery 

func (tsv *TabletServer) SplitQuery(ctx context.Context, target *pb.Target, req *proto.SplitQueryRequest, reply *proto.SplitQueryResult) (err error)

SplitQuery splits a BoundQuery into smaller queries that return a subset of rows from the original query.

func (*TabletServer) SpotCheckRatio 

func (tsv *TabletServer) SpotCheckRatio() float64

SpotCheckRatio returns the spot check ratio.

func (*TabletServer) StartService 

func (tsv *TabletServer) StartService(target pb.Target, dbconfigs dbconfigs.DBConfigs, schemaOverrides []SchemaOverride, mysqld mysqlctl.MysqlDaemon) (err error)

StartService is a convenience function for InitDBConfig->SetServingType with serving=true.

func (*TabletServer) StopService 

func (tsv *TabletServer) StopService()

StopService shuts down the tabletserver to the uninitialized state. It first transitions to StateShuttingDown, then waits for existing transactions to complete. Once all transactions are resolved, it shuts down the rest of the services nad transitions to StateNotConnected.

func (*TabletServer) StreamExecute 

func (tsv *TabletServer) StreamExecute(ctx context.Context, target *pb.Target, query *proto.Query, sendReply func(*mproto.QueryResult) error) (err error)

StreamExecute executes the query and streams the result. The first QueryResult will have Fields set (and Rows nil). The subsequent QueryResult will have Rows set (and Fields nil).

func (*TabletServer) StreamHealthRegister 

func (tsv *TabletServer) StreamHealthRegister(c chan<- *pb.StreamHealthResponse) (int, error)

StreamHealthRegister is part of queryservice.QueryService interface

func (*TabletServer) StreamHealthUnregister 

func (tsv *TabletServer) StreamHealthUnregister(id int) error

StreamHealthUnregister is part of queryservice.QueryService interface

func (*TabletServer) StreamPoolSize 

func (tsv *TabletServer) StreamPoolSize() int

StreamPoolSize returns the pool size.

func (*TabletServer) TxPoolSize 

func (tsv *TabletServer) TxPoolSize() int

TxPoolSize returns the tx pool size.

func (*TabletServer) TxTimeout 

func (tsv *TabletServer) TxTimeout() time.Duration

TxTimeout returns the transaction timeout.

func (*TabletServer) UnRegisterQueryRuleSource 

func (tsv *TabletServer) UnRegisterQueryRuleSource(ruleSource string)

UnRegisterQueryRuleSource unregisters ruleSource from query rules.

type TxConnection 

type TxConnection struct {
	*DBConn
	TransactionID int64

	StartTime time.Time
	EndTime   time.Time

	Queries           []string
	Conclusion        string
	LogToFile         sync2.AtomicInt32
	ImmediateCallerID *qrpb.VTGateCallerID
	EffectiveCallerID *vtrpc.CallerID
	// contains filtered or unexported fields
}

TxConnection is meant for executing transactions. It keeps track of dirty keys for rowcache invalidation. It can return itself to the tx pool correctly. It also does not retry statements if there are failures.

func (*TxConnection) DirtyKeys 

func (txc *TxConnection) DirtyKeys(tableName string) DirtyKeys

DirtyKeys returns the list of rowcache keys that became dirty during the transaction.

func (*TxConnection) EventTime 

func (txc *TxConnection) EventTime() time.Time

EventTime returns the time the event was created.

func (*TxConnection) Exec 

func (txc *TxConnection) Exec(ctx context.Context, query string, maxrows int, wantfields bool) (*proto.QueryResult, error)

Exec executes the statement for the current transaction.

func (*TxConnection) Format 

func (txc *TxConnection) Format(params url.Values) string

Format returns a printable version of the connection info.

func (*TxConnection) RecordQuery 

func (txc *TxConnection) RecordQuery(query string)

RecordQuery records the query against this transaction.

func (*TxConnection) Recycle 

func (txc *TxConnection) Recycle()

Recycle returns the connection to the pool. The transaction remains active.

type TxPool 

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

TxPool is the transaction pool for the query service.

func NewTxPool 

func NewTxPool(
	name string,
	txStatsPrefix string,
	capacity int,
	timeout time.Duration,
	idleTimeout time.Duration,
	enablePublishStats bool,
	qStats *QueryServiceStats,
	checker MySQLChecker) *TxPool

NewTxPool creates a new TxPool. It's not operational until it's Open'd.

func (*TxPool) Begin 

func (axp *TxPool) Begin(ctx context.Context) int64

Begin begins a transaction, and returns the associated transaction id. Subsequent statements can access the connection through the transaction id.

func (*TxPool) Close 

func (axp *TxPool) Close()

Close closes the TxPool. A closed pool can be reopened.

func (*TxPool) Get 

func (axp *TxPool) Get(transactionID int64) (conn *TxConnection)

Get fetches the connection associated to the transactionID. You must call Recycle on TxConnection once done.

func (*TxPool) LogActive 

func (axp *TxPool) LogActive()

LogActive causes all existing transactions to be logged when they complete. The logging is throttled to no more than once every txLogInterval.

func (*TxPool) Open 

func (axp *TxPool) Open(appParams, dbaParams *sqldb.ConnParams)

Open makes the TxPool operational. This also starts the transaction killer that will kill long-running transactions.

func (*TxPool) Rollback 

func (axp *TxPool) Rollback(ctx context.Context, transactionID int64)

Rollback rolls back the specified transaction.

func (*TxPool) SafeCommit 

func (axp *TxPool) SafeCommit(ctx context.Context, transactionID int64) (invalidList map[string]DirtyKeys, err error)

SafeCommit commits the specified transaction. Unlike other functions, it returns an error on failure instead of panic. The connection becomes free and can be reused in the future.

func (*TxPool) SetTimeout 

func (axp *TxPool) SetTimeout(timeout time.Duration)

SetTimeout sets the transaction timeout.

func (*TxPool) Timeout 

func (axp *TxPool) Timeout() time.Duration

Timeout returns the transaction timeout.

func (*TxPool) WaitForEmpty 

func (axp *TxPool) WaitForEmpty()

WaitForEmpty waits until all active transactions are completed.

Source Files

View all Source files

Directories

Path Synopsis
customrule
filecustomrule
Package filecustomrule implements static custom rule from a config file
 Package filecustomrule implements static custom rule from a config file
zkcustomrule
Package endtoend is a test-only package.
 Package endtoend is a test-only package.
framework
Package fakecacheservice provides a fake implementation of cacheservice.CacheService
 Package fakecacheservice provides a fake implementation of cacheservice.CacheService
Package queryservice contains the interface for the service definition of the Query Service.
 Package queryservice contains the interface for the service definition of the Query Service.
Package tabletconntest provides the test methods to make sure a tabletconn/queryservice pair over RPC works correctly.
 Package tabletconntest provides the test methods to make sure a tabletconn/queryservice pair over RPC works correctly.
Package tabletservermock provides mock interfaces for tabletserver.
 Package tabletservermock provides mock interfaces for tabletserver.

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