util

package
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Published: Mar 12, 2018 License: Apache-2.0 Imports: 4 Imported by: 0

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Constants

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

Variables

This section is empty.

Functions

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 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.

Types

type ProcessInfo

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

ProcessInfo is a struct used for show processlist statement.

type SessionManager

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

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

Directories

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