utils

package
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 Go to latest Published: Apr 21, 2018 License: Apache-2.0 Imports: 9 Imported by: 0

Documentation

Overview

Copyright 2014 loolgame Author. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Copyright 2014 mqant Author. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Copyright 2014 mqantserver Author. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Copyright 2014 mqantserver Author. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Index

Constants

This section is empty.

Variables

View Source 
var SHARD_COUNT = 32

Functions

func BoolToBytes 

func BoolToBytes(v bool) []byte

func BytesToBool 

func BytesToBool(buf []byte) bool

func BytesToFloat32 

func BytesToFloat32(bytes []byte) float32

func BytesToFloat64 

func BytesToFloat64(bytes []byte) float64

func BytesToInt 

func BytesToInt(buf []byte) int

func BytesToInt32 

func BytesToInt32(buf []byte) int32

func BytesToInt64 

func BytesToInt64(buf []byte) int64

func BytesToMap 

func BytesToMap(bytes []byte) (map[string]interface{}, error)

func BytesToMapString 

func BytesToMapString(bytes []byte) (map[string]string, error)

func Float32ToBytes 

func Float32ToBytes(float float32) []byte

func Float64ToBytes 

func Float64ToBytes(float float64) []byte

func Go 

func Go(f func())

func Idle 

func Idle() bool

func Int32ToBytes 

func Int32ToBytes(i int32) []byte

func Int64ToBytes 

func Int64ToBytes(i int64) []byte

func IntToBytes 

func IntToBytes(i int) []byte

func MapToBytes 

func MapToBytes(jmap map[string]interface{}) ([]byte, error)

func MapToBytesString 

func MapToBytesString(jmap map[string]string) ([]byte, error)

func RandInt64 

func RandInt64(min, max int64) int64

func Struct2Map 

func Struct2Map(obj interface{}) map[string]interface{}

Types

type BeeMap 

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

BeeMap is a map with lock

func NewBeeMap 

func NewBeeMap() *BeeMap

NewBeeMap return new safemap

func (*BeeMap) Check 

func (m *BeeMap) Check(k interface{}) bool

Check Returns true if k is exist in the map.

func (*BeeMap) Delete 

func (m *BeeMap) Delete(k interface{})

Delete the given key and value.

func (*BeeMap) DeleteAll 

func (m *BeeMap) DeleteAll()

func (*BeeMap) Get 

func (m *BeeMap) Get(k interface{}) interface{}

Get from maps return the k's value

func (*BeeMap) Items 

func (m *BeeMap) Items() map[interface{}]interface{}

Items returns all items in safemap.

func (*BeeMap) Set 

func (m *BeeMap) Set(k interface{}, v interface{}) bool

Set Maps the given key and value. Returns false if the key is already in the map and changes nothing.

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

Returns the number of elements within the map.

func (ConcurrentMap) Get 

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

Retrieves an element from map under given key.

func (ConcurrentMap) GetShard 

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

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

Checks if map is empty.

func (ConcurrentMap) Items 

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

Returns all items as map[string]interface{}

func (ConcurrentMap) Iter deprecated 

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

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

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

Return 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)

Removes an element from the map and returns it

func (ConcurrentMap) Remove 

func (m ConcurrentMap) Remove(key string)

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 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

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