70 lines
1.5 KiB
Go
70 lines
1.5 KiB
Go
package main
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import (
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"sync"
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)
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// Collection is sync.Map, that stores arbitrary data.
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type Collection struct {
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items sync.Map
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close chan struct{}
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}
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// Item just interface for stoing any data.
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type item struct {
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data interface{}
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}
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// NewCollection creates new instance of "collection".
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func NewCollection() *Collection {
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c := &Collection{ //nolint:exhaustruct
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close: make(chan struct{}),
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}
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return c
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}
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// Get returns value by given key. Or empty value.
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func (collection *Collection) Get(key interface{}) (interface{}, bool) {
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obj, exists := collection.items.Load(key)
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if !exists {
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return nil, false
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}
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item := obj.(item)
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return item.data, true
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}
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// Set saves value to given "collection".
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func (collection *Collection) Set(key interface{}, value interface{}) {
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collection.items.Store(key, item{
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data: value,
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})
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}
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// Range apply function f to all keys/values in collection. Retuns immediatly on first error.
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func (collection *Collection) Range(f func(key, value interface{}) bool) {
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fn := func(key, value interface{}) bool {
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item := value.(item)
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return f(key, item.data)
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}
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collection.items.Range(fn)
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}
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// Delete deletes key and corresponding value from collection.
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func (collection *Collection) Delete(key interface{}) {
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collection.items.Delete(key)
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}
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// Close frees memory occupied by collection and deletes collection itself.
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func (collection *Collection) Close() {
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collection.close <- struct{}{}
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collection.items = sync.Map{}
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}
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/* vim: set ft=go noet ai ts=4 sw=4 sts=4: */
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