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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>expiremap: Go Coverage Report</title>
<style>
body {
background: black;
color: rgb(80, 80, 80);
}
body, pre, #legend span {
font-family: Menlo, monospace;
font-weight: bold;
}
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background: black;
position: fixed;
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height: 42px;
border-bottom: 1px solid rgb(80, 80, 80);
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}
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float: left;
margin-left: 10px;
}
#legend {
margin-top: 12px;
}
#nav {
margin-top: 10px;
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#legend span {
margin: 0 5px;
}
.cov0 { color: rgb(192, 0, 0) }
.cov1 { color: rgb(128, 128, 128) }
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.cov3 { color: rgb(104, 152, 134) }
.cov4 { color: rgb(92, 164, 137) }
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.cov6 { color: rgb(68, 188, 143) }
.cov7 { color: rgb(56, 200, 146) }
.cov8 { color: rgb(44, 212, 149) }
.cov9 { color: rgb(32, 224, 152) }
.cov10 { color: rgb(20, 236, 155) }
</style>
</head>
<body>
<div id="topbar">
<div id="nav">
<select id="files">
<option value="file0">github.com/united-manufacturing-hub/expiremap/v2/pkg/expiremap/expiremap.go (100.0%)</option>
</select>
</div>
<div id="legend">
<span>not tracked</span>
<span class="cov0">not covered</span>
<span class="cov8">covered</span>
</div>
</div>
<div id="content">
<pre class="file" id="file0" style="display: none">package expiremap
import (
"sync"
"time"
)
// item struct represents an individual element with a value and its expiration time.
type item[V any] struct {
value V
expiresAt time.Time
}
// ExpireMap is a generic map structure that allows setting and retrieving items with expiration.
type ExpireMap[T comparable, V any] struct {
m map[T]item[V] // Holds the actual data with their expiration details.
lock sync.RWMutex // Mutex for ensuring concurrent access.
cullPeriod time.Duration // Duration to wait before cleaning expired items.
defaultTTL time.Duration // Default time to live for items if not specified.
}
// New creates a new instance of ExpireMap with default cullPeriod and defaultTTL set to 1 minute.
func New[T comparable, V any]() *ExpireMap[T, V] <span class="cov8" title="1">{
return NewEx[T, V](time.Minute, time.Minute)
}</span>
// NewEx creates a new instance of ExpireMap with specified cullPeriod and defaultTTL.
func NewEx[T comparable, V any](cullPeriod, defaultTTL time.Duration) *ExpireMap[T, V] <span class="cov8" title="1">{
var m = ExpireMap[T, V]{
m: make(map[T]item[V]),
cullPeriod: cullPeriod,
defaultTTL: defaultTTL,
lock: sync.RWMutex{},
}
go m.cull()
return &m
}</span>
// Set adds a new item to the map with the default TTL.
func (m *ExpireMap[T, V]) Set(key T, value V) <span class="cov8" title="1">{
m.SetEx(key, value, m.defaultTTL)
}</span>
// SetEx adds a new item to the map with a specified TTL.
func (m *ExpireMap[T, V]) SetEx(key T, value V, ttl time.Duration) <span class="cov8" title="1">{
m.lock.Lock()
defer m.lock.Unlock()
m.m[key] = item[V]{value: value, expiresAt: time.Now().Add(ttl)}
}</span>
// LoadOrStore retrieves an item from the map by key. If it doesn't exist, stores the provided value with the default TTL.
func (m *ExpireMap[T, V]) LoadOrStore(key T, value V) (*V, bool) <span class="cov8" title="1">{
return m.LoadOrStoreEx(key, value, m.defaultTTL)
}</span>
// LoadOrStoreEx retrieves an item from the map by key. If it doesn't exist, stores the provided value with the specified TTL.
func (m *ExpireMap[T, V]) LoadOrStoreEx(key T, value V, ttl time.Duration) (*V, bool) <span class="cov8" title="1">{
m.lock.Lock()
defer m.lock.Unlock()
if v, ok := m.m[key]; ok && v.expiresAt.After(time.Now()) </span><span class="cov8" title="1">{
return &v.value, true
}</span>
<span class="cov8" title="1">m.m[key] = item[V]{value: value, expiresAt: time.Now().Add(ttl)}
return &value, false</span>
}
// LoadAndDelete retrieves the newest valid item from the map by key and then deletes it.
func (m *ExpireMap[T, V]) LoadAndDelete(key T) (*V, bool) <span class="cov8" title="1">{
m.lock.Lock()
defer m.lock.Unlock()
if v, ok := m.m[key]; ok && v.expiresAt.After(time.Now()) </span><span class="cov8" title="1">{
delete(m.m, key)
return &v.value, true
}</span>
<span class="cov8" title="1">return nil, false</span>
}
// Load retrieves the newest valid item from the map by key.
func (m *ExpireMap[T, V]) Load(key T) (*V, bool) <span class="cov8" title="1">{
m.lock.RLock()
defer m.lock.RUnlock()
if v, ok := m.m[key]; ok && v.expiresAt.After(time.Now()) </span><span class="cov8" title="1">{
return &v.value, true
}</span>
<span class="cov8" title="1">return nil, false</span>
}
// Delete removes all items associated with the provided key from the map.
func (m *ExpireMap[T, V]) Delete(key T) <span class="cov8" title="1">{
m.lock.Lock()
defer m.lock.Unlock()
delete(m.m, key)
}</span>
// cull periodically cleans up expired items from the map.
func (m *ExpireMap[T, V]) cull() <span class="cov8" title="1">{
ticker := time.NewTicker(m.cullPeriod)
defer ticker.Stop()
for </span><span class="cov8" title="1">{
<-ticker.C
m.lock.Lock()
now := time.Now()
for k, v := range m.m </span><span class="cov8" title="1">{
if v.expiresAt.Before(now) </span><span class="cov8" title="1">{
delete(m.m, k)
}</span>
}
<span class="cov8" title="1">m.lock.Unlock()</span>
}
}
// Range iterates over each key-value pair in the map and calls the provided function until it returns false.
func (m *ExpireMap[T, V]) Range(f func(key T, value V) bool) <span class="cov8" title="1">{
m.lock.RLock()
defer m.lock.RUnlock()
for k, v := range m.m </span><span class="cov8" title="1">{
if !f(k, v.value) </span><span class="cov8" title="1">{
break</span>
}
}
}
</pre>
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