utils

package
v0.1.6 Latest Latest
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 Go to latest Published: Apr 25, 2024 License: Apache-2.0 Imports: 29 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	EnableKubeClient = false
)
View Source 
var (
	KubeClient kubernetes.Interface
)
View Source 
var SHARD_COUNT = 32

Functions

func CalculateCpuAndMem 

func CalculateCpuAndMem(pod *corev1.Pod) (float64, float64)

计算 Pod 的 CPU 和 mem

func ClientIP 

func ClientIP(r *http.Request) string

ClientIP 尽最大努力实现获取客户端 IP 的算法。 解析 X-Real-IP 和 X-Forwarded-For 以便于反向代理（nginx 或 haproxy）可以正常工作。

func CloneStringMap 

func CloneStringMap(src map[string]string) map[string]string

CloneStringMap copy src to dst of type map[string]string

func ConvertNil 

func ConvertNil(value string) string

func Dumps 

func Dumps(v interface{}) string

Dumps dump interface as indented json object

func DumpsEventBasic 

func DumpsEventBasic(event *audit.Event) string

DumpsEventBasic will remove some info from pod spec to reduce log size and sensitive data to be leaked

func DumpsEventKeyInfo 

func DumpsEventKeyInfo(event *audit.Event) string

func FormatTime 

func FormatTime(t time.Time) string

FormatTime format time to UTC time and with million seconds

func GetClientFromFile 

func GetClientFromFile(masterUrl, kubeConfigFile string, qps float32, burst int) (kubernetes.Interface, error)

GetClientFromFile create a k8s client from config file

func GetClientFromIncluster 

func GetClientFromIncluster(qps float32, burst int) (clientset.Interface, error)

func GetMetaName 

func GetMetaName(dest interface{}) (string, string, string, error)

获取数据的 SqlTableName EsTableName TypeName

func GetPersistentVolumeClaimNamesFromPod 

func GetPersistentVolumeClaimNamesFromPod(pod *corev1.Pod) []string

获取pod中所有pvc的资源名列表

func GetPulledImageFromEventMessage 

func GetPulledImageFromEventMessage(s string) string

GetPulledImageFromEventMessage get image name from pulled event

func GetPullingImageFromEventMessage 

func GetPullingImageFromEventMessage(s string) string

GetPullingImageFromEventMessage get image name from pulling event

func GoID 

func GoID() int

func HandleCrash 

func HandleCrash()

func IgnorePanic 

func IgnorePanic(desc string)

func InAnnotations 

func InAnnotations(annotations map[string]string, k string) bool

func InFinalizers 

func InFinalizers(finalizers []string, k string) bool

func InitKube 

func InitKube(kubeConfigPath string) error

func Marshal 

func Marshal(v interface{}) string

Marshal Marshal object to string of the error message if failed

func MergeMaps 

func MergeMaps(mapTo, mapFrom map[string]string)

func ParseJSONPath 

func ParseJSONPath(input interface{}, name, template string) (string, error)

func ParseTags 

func ParseTags(simpleTags []string, jsonTags []string) (map[string]string, error)

func ParseTime 

func ParseTime(s string) (time.Time, error)

ParseTime parse string into time using layout "2006-01-02T15:04:05.000Z"

func RandString 

func RandString(n int) string

RandString generate n-length random string

func ReTry 

func ReTry(f func() error, interval time.Duration, retryCount int) (err error)

ReTry try to call a function until success.

func SetBoolParam 

func SetBoolParam(values url.Values, name string, f *bool)

func SetStringParam 

func SetStringParam(values url.Values, name string, f *string)

func SetTimeLayoutParam 

func SetTimeLayoutParam(values url.Values, name string, f *time.Time)

func SetTimeParam 

func SetTimeParam(values url.Values, name string, f *time.Time)

func ShouldIgnoreNamespace 

func ShouldIgnoreNamespace(ns string) bool

ShouldIgnoreNamespace return true is namespace should be omit

func SliceContainsString 

func SliceContainsString(arr []string, s string) bool

func StringHashcode 

func StringHashcode(s string) int

func TimeDiffInMilliMinutes 

func TimeDiffInMilliMinutes(start, end time.Time) float64

TimeDiffInMilliMinutes return time difference in minutes

func TimeDiffInMilliSeconds 

func TimeDiffInMilliSeconds(start, end time.Time) float64

func TimeDiffInSeconds 

func TimeDiffInSeconds(start, end time.Time) float64

TimeDiffInSeconds get time difference in unit second.

func TimeSinceInMilliSeconds 

func TimeSinceInMilliSeconds(start time.Time) float64

func TimeSinceInMinutes 

func TimeSinceInMinutes(start time.Time) float64

TimeSinceInMinutes return minutes since start

func TimeSinceInSeconds 

func TimeSinceInSeconds(start time.Time) float64

func Warnf 

func Warnf(format string, args ...interface{})

Types

type BufferData 

type BufferData struct {
	sync.WaitGroup
	// contains filtered or unexported fields
}

func NewBufferData 

func NewBufferData(sequential bool) *BufferData

type BufferUtils 

type BufferUtils struct {
	sync.Mutex
	// contains filtered or unexported fields
}

func NewBufferUtils 

func NewBufferUtils(name string, bufferSize int, clearPeriod time.Duration, sequential bool, saveFunc func(map[string]interface{}) error) *BufferUtils

func (*BufferUtils) DoClearData 

func (b *BufferUtils) DoClearData()

func (*BufferUtils) SaveData 

func (b *BufferUtils) SaveData(id string, data interface{}) error

func (*BufferUtils) Stop 

func (b *BufferUtils) Stop()

wait to clear data when get stop signal

type ConcurrentMap 

type ConcurrentMap []*ConcurrentMapShared

A "thread" safe map of type string:Anything. To avoid lock bottlenecks this map is dived to several (SHARD_COUNT) map shards.

func New 

func New() ConcurrentMap

Creates a new concurrent map.

func (ConcurrentMap) Clear 

func (m ConcurrentMap) Clear()

Clear removes all items from map.

func (ConcurrentMap) Count 

func (m ConcurrentMap) Count() int

Count returns the number of elements within the map.

func (ConcurrentMap) Get 

func (m ConcurrentMap) Get(key string) (interface{}, bool)

Get retrieves an element from map under given key.

func (ConcurrentMap) GetShard 

func (m ConcurrentMap) GetShard(key string) *ConcurrentMapShared

GetShard returns shard under given key

func (ConcurrentMap) Has 

func (m ConcurrentMap) Has(key string) bool

Looks up an item under specified key

func (ConcurrentMap) IsEmpty 

func (m ConcurrentMap) IsEmpty() bool

IsEmpty checks if map is empty.

func (ConcurrentMap) Items 

func (m ConcurrentMap) Items() map[string]interface{}

Items returns all items as map[string]interface{}

func (ConcurrentMap) Iter deprecated 

func (m ConcurrentMap) Iter() <-chan Tuple

Iter returns an iterator which could be used in a for range loop.

Deprecated: using IterBuffered() will get a better performence

func (ConcurrentMap) IterBuffered 

func (m ConcurrentMap) IterBuffered() <-chan Tuple

IterBuffered returns a buffered iterator which could be used in a for range loop.

func (ConcurrentMap) IterCb 

func (m ConcurrentMap) IterCb(fn IterCb)

Callback based iterator, cheapest way to read all elements in a map.

func (ConcurrentMap) IterCbConcurrent 

func (m ConcurrentMap) IterCbConcurrent(fn IterCb)

Callback based iterator, cheapest way to read all elements in a map.

func (ConcurrentMap) Keys 

func (m ConcurrentMap) Keys() []string

Keys returns all keys as []string

func (ConcurrentMap) MSet 

func (m ConcurrentMap) MSet(data map[string]interface{})

func (ConcurrentMap) MarshalJSON 

func (m ConcurrentMap) MarshalJSON() ([]byte, error)

Reviles ConcurrentMap "private" variables to json marshal.

func (ConcurrentMap) Pop 

func (m ConcurrentMap) Pop(key string) (v interface{}, exists bool)

Pop removes an element from the map and returns it

func (ConcurrentMap) Remove 

func (m ConcurrentMap) Remove(key string)

Remove removes an element from the map.

func (ConcurrentMap) RemoveCb 

func (m ConcurrentMap) RemoveCb(key string, cb RemoveCb) bool

RemoveCb locks the shard containing the key, retrieves its current value and calls the callback with those params If callback returns true and element exists, it will remove it from the map Returns the value returned by the callback (even if element was not present in the map)

func (ConcurrentMap) Set 

func (m ConcurrentMap) Set(key string, value interface{})

Sets the given value under the specified key.

func (ConcurrentMap) SetIfAbsent 

func (m ConcurrentMap) SetIfAbsent(key string, value interface{}) bool

Sets the given value under the specified key if no value was associated with it.

func (ConcurrentMap) Upsert 

func (m ConcurrentMap) Upsert(key string, value interface{}, cb UpsertCb) (res interface{})

Insert or Update - updates existing element or inserts a new one using UpsertCb

type ConcurrentMapShared 

type ConcurrentMapShared struct {
	sync.RWMutex // Read Write mutex, guards access to internal map.
	// contains filtered or unexported fields
}

A "thread" safe string to anything map.

type EsTabler 

type EsTabler interface {
	EsTableName() string
}

type ExpiringMap 

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

func NewExpiringMap 

func NewExpiringMap(timeout time.Duration) *ExpiringMap

func (*ExpiringMap) Delete 

func (em *ExpiringMap) Delete(key string)

func (*ExpiringMap) Get 

func (em *ExpiringMap) Get(key string) (interface{}, bool)

func (*ExpiringMap) Set 

func (em *ExpiringMap) Set(key string, value interface{})

type FlowControl 

type FlowControl struct {
	WindowMaxSize        int     // 窗口大小
	FastBackoffThreshold int     // 快速退避错误阈值
	FastBackoffFactor    float64 // 快速退避因子
	SlowRecoverFactor    float64 // 慢恢复因子
	MaxFlowSize          float64 // 最大流量值
	// contains filtered or unexported fields
}

func NewFlowControl 

func NewFlowControl(wms int, fbt int, fbf float64, srf float64, mfs float64) *FlowControl

func (*FlowControl) DecideFlow 

func (f *FlowControl) DecideFlow(desire float64) float64

func (*FlowControl) RecordFlow 

func (f *FlowControl) RecordFlow(flowSuccess bool)

type Item 

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

expired map

type IterCb 

type IterCb func(key string, v interface{})

Iterator callback,called for every key,value found in maps. RLock is held for all calls for a given shard therefore callback sess consistent view of a shard, but not across the shards

type JsoniterDecoder 

type JsoniterDecoder struct{}

func (*JsoniterDecoder) Decode 

func (u *JsoniterDecoder) Decode(data []byte, v interface{}) error

Decode decodes with json.Unmarshal from the Go standard library.

type LRU 

type LRU interface {
	Get(key string) interface{}
	Put(key string, value interface{})
}

func LRUCache 

func LRUCache(name string, capacity int) LRU

type RemoveCb 

type RemoveCb func(key string, v interface{}, exists bool) bool

RemoveCb is a callback executed in a map.RemoveCb() call, while Lock is held If returns true, the element will be removed from the map

type SafeMap 

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

func NewSafeMap 

func NewSafeMap() *SafeMap

func (*SafeMap) Delete 

func (smap *SafeMap) Delete(key string)

func (*SafeMap) Get 

func (smap *SafeMap) Get(key string) (interface{}, bool)

func (*SafeMap) IterateWithFunc 

func (smap *SafeMap) IterateWithFunc(f func(interface{}))

IterateWithFunc iterate map

func (*SafeMap) Set 

func (smap *SafeMap) Set(key string, data interface{})

func (*SafeMap) Size 

func (smap *SafeMap) Size() int

type Tabler 

type Tabler interface {
	TableName() string
}

type Tuple 

type Tuple struct {
	Key string
	Val interface{}
}

Used by the Iter & IterBuffered functions to wrap two variables together over a channel,

type Typer 

type Typer interface {
	TypeName() string
}

type UpsertCb 

type UpsertCb func(exist bool, valueInMap interface{}, newValue interface{}) interface{}

Callback to return new element to be inserted into the map It is called while lock is held, therefore it MUST NOT try to access other keys in same map, as it can lead to deadlock since Go sync.RWLock is not reentrant

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