concurrent

Documentation

Index

• Variables
• func AtomicAdd() uint32
• func ChanCount(ch chan int)
• func ChannelDefine(chanCount chan int, timeOut chan bool)
• func ChannelSelect()
• func Con2Go()
• func Count(lock *sync.Mutex)
• func CurlApi(json chan string)
• func ExecuteChanCount() (sum uint32)
• func ExecuteConsCurl() (result map[int]string)
• func ExecuteCount()
• func GetFinalValue() []int
• func GetGoroutineId() uint64
• func GetLocalMainIP() (string, int, error)
• func GetValue() int
• func HandleRequest()
• func InitData()
• func Query()
• func TransferToTimeStamp()
• type ConcurrentMap
  • func New() ConcurrentMap
  • func (m ConcurrentMap) Count() int
  • func (m ConcurrentMap) Get(key string) (interface{}, bool)
  • func (m ConcurrentMap) GetShard(key string) *ConcurrentMapShared
  • func (m ConcurrentMap) Has(key string) bool
  • func (m ConcurrentMap) IsEmpty() bool
  • func (m ConcurrentMap) Items() map[string]interface{}
  • func (m ConcurrentMap) Iter() <-chan Tuple
  • func (m ConcurrentMap) IterBuffered() <-chan Tuple
  • func (m ConcurrentMap) IterCb(fn IterCb)
  • func (m ConcurrentMap) Keys() []string
  • func (m ConcurrentMap) MSet(data map[string]interface{})
  • func (m ConcurrentMap) MarshalJSON() ([]byte, error)
  • func (m ConcurrentMap) Pop(key string) (v interface{}, exists bool)
  • func (m ConcurrentMap) Remove(key string)
  • func (m ConcurrentMap) RemoveCb(key string, cb RemoveCb) bool
  • func (m ConcurrentMap) Set(key string, value interface{})
  • func (m ConcurrentMap) SetIfAbsent(key string, value interface{}) bool
  • func (m ConcurrentMap) Upsert(key string, value interface{}, cb UpsertCb) (res interface{})
• type ConcurrentMapShared
• type Counter
  • func InitCounter() *Counter
  • func (c *Counter) Clear()
  • func (c *Counter) Get() uint32
  • func (c *Counter) Incr()
• type HandleResult
• type IterCb
• type RemoveCb
• type Tuple
• type UpsertCb

Variables

var (
	//c = NewConcurrent()
	PersonMap map[string]string //c.personMap
	Keys      []string          //= c.keys
	Values    []string          //= c.Values
	DataMap   map[string]string //= c.dataMap
)

var SHARD_COUNT = 32

Functions

func AtomicAdd

func AtomicAdd() uint32

func ChanCount

func ChanCount(ch chan int)

func ChannelDefine

func ChannelDefine(chanCount chan int, timeOut chan bool)

channel 的使用 定义 channel 增加缓冲区，缓冲区大小为1024。 缓冲区的作用就是将创建了一个大小 为1024的int类型channel，即使没有读取方，写入方也可以一直往channel里写入，在缓冲区被 填完之前都不会阻塞 增加超时，避免死锁，即如果在执行函数发生不可预知的错误的时候，读取方一直没有在管道中获取到数据，则会造成goroutine 死锁

func ChannelSelect

func ChannelSelect()

select 只能携带chan 定义的写入以及写出，但是忽略数据值

func Con2Go

func Con2Go()

func Count

func Count(lock *sync.Mutex)

func CurlApi

func CurlApi(json chan string)

func ExecuteChanCount

func ExecuteChanCount() (sum uint32)

func ExecuteConsCurl

func ExecuteConsCurl() (result map[int]string)

func ExecuteCount

func ExecuteCount()

func GetFinalValue

func GetFinalValue() []int

TODO 缓存区 + 超时机制

func GetGoroutineId

func GetGoroutineId() uint64

func GetLocalMainIP

func GetLocalMainIP() (string, int, error)

func GetValue

func GetValue() int

func HandleRequest

func HandleRequest()

func InitData

func InitData()

func Query

func Query()

func TransferToTimeStamp

func TransferToTimeStamp()

Types

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) 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

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) 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 Counter

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

func InitCounter

func InitCounter() *Counter

func (*Counter) Clear

func (c *Counter) Clear()

func (*Counter) Get

func (c *Counter) Get() uint32

func (*Counter) Incr

func (c *Counter) Incr()

type HandleResult

type HandleResult struct {
	Result map[string]int
}

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 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 Tuple

type Tuple struct {
	Key string
	Val interface{}
}

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

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