util

package
Version: v2.0.11+incompatible Latest Latest
Warning

This package is not in the latest version of its module.

Go to latest
Published: Jan 3, 2019 License: Apache-2.0 Imports: 6 Imported by: 1,081

Documentation

Index

Constants

View Source
const (
	// DefaultMaxRetries indicates the max retry count.
	DefaultMaxRetries = 30
	// RetryInterval indicates retry interval.
	RetryInterval uint64 = 500
)

Variables

This section is empty.

Functions

func DelKeyWithPrefix

func DelKeyWithPrefix(rm kv.RetrieverMutator, prefix kv.Key) error

DelKeyWithPrefix deletes keys with prefix.

func GetStack

func GetStack() []byte

GetStack gets the stacktrace.

func RandomBuf

func RandomBuf(size int) []byte

RandomBuf generates a random string using ASCII characters but avoid separator character. See https://github.com/mysql/mysql-server/blob/5.7/mysys_ssl/crypt_genhash_impl.cc#L435

func RowKeyPrefixFilter

func RowKeyPrefixFilter(rowKeyPrefix kv.Key) kv.FnKeyCmp

RowKeyPrefixFilter returns a function which checks whether currentKey has decoded rowKeyPrefix as prefix.

func RunWithRetry

func RunWithRetry(retryCnt int, backoff uint64, f func() (bool, error)) (err error)

RunWithRetry will run the f with backoff and retry. retryCnt: Max retry count backoff: When run f failed, it will sleep backoff * triedCount time.Millisecond. Function f should have two return value. The first one is an bool which indicate if the err if retryable. The second is if the f meet any error.

func ScanMetaWithPrefix

func ScanMetaWithPrefix(retriever kv.Retriever, prefix kv.Key, filter func(kv.Key, []byte) bool) error

ScanMetaWithPrefix scans metadata with the prefix.

Types

type ProcessInfo

type ProcessInfo struct {
	ID      uint64
	User    string
	Host    string
	DB      string
	Command string
	Time    time.Time
	State   uint16
	Info    string
	Mem     int64
}

ProcessInfo is a struct used for show processlist statement.

type SessionManager

type SessionManager interface {
	// ShowProcessList returns map[connectionID]ProcessInfo.
	ShowProcessList() map[uint64]ProcessInfo
	Kill(connectionID uint64, query bool)
}

SessionManager is an interface for session manage. Show processlist and kill statement rely on this interface.

Directories

Path Synopsis
Package mock is just for test only.
Package mock is just for test only.

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL