48 lines
963 B
Go
48 lines
963 B
Go
package multistep
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import (
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"sync"
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)
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// StateBag holds the state that is used by the Runner and Steps. The
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// StateBag implementation must be safe for concurrent access.
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type StateBag interface {
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Get(string) interface{}
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GetOk(string) (interface{}, bool)
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Put(string, interface{})
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}
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// BasicStateBag implements StateBag by using a normal map underneath
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// protected by a RWMutex.
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type BasicStateBag struct {
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data map[string]interface{}
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l sync.RWMutex
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once sync.Once
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}
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func (b *BasicStateBag) Get(k string) interface{} {
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result, _ := b.GetOk(k)
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return result
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}
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func (b *BasicStateBag) GetOk(k string) (interface{}, bool) {
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b.l.RLock()
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defer b.l.RUnlock()
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result, ok := b.data[k]
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return result, ok
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}
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func (b *BasicStateBag) Put(k string, v interface{}) {
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b.l.Lock()
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defer b.l.Unlock()
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// Make sure the map is initialized one time, on write
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b.once.Do(func() {
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b.data = make(map[string]interface{})
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})
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// Write the data
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b.data[k] = v
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}
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