зеркало из https://github.com/microsoft/docker.git
93 строки
2.0 KiB
Go
93 строки
2.0 KiB
Go
package container
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import "sync"
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// memoryStore implements a Store in memory.
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type memoryStore struct {
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s map[string]*Container
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sync.RWMutex
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}
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// NewMemoryStore initializes a new memory store.
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func NewMemoryStore() Store {
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return &memoryStore{
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s: make(map[string]*Container),
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}
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}
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// Add appends a new container to the memory store.
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// It overrides the id if it existed before.
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func (c *memoryStore) Add(id string, cont *Container) {
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c.Lock()
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c.s[id] = cont
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c.Unlock()
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}
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// Get returns a container from the store by id.
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func (c *memoryStore) Get(id string) *Container {
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c.RLock()
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res := c.s[id]
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c.RUnlock()
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return res
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}
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// Delete removes a container from the store by id.
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func (c *memoryStore) Delete(id string) {
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c.Lock()
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delete(c.s, id)
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c.Unlock()
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}
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// List returns a sorted list of containers from the store.
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// The containers are ordered by creation date.
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func (c *memoryStore) List() []*Container {
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containers := History(c.all())
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containers.sort()
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return containers
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}
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// Size returns the number of containers in the store.
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func (c *memoryStore) Size() int {
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c.RLock()
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defer c.RUnlock()
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return len(c.s)
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}
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// First returns the first container found in the store by a given filter.
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func (c *memoryStore) First(filter StoreFilter) *Container {
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for _, cont := range c.all() {
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if filter(cont) {
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return cont
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}
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}
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return nil
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}
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// ApplyAll calls the reducer function with every container in the store.
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// This operation is asyncronous in the memory store.
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// NOTE: Modifications to the store MUST NOT be done by the StoreReducer.
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func (c *memoryStore) ApplyAll(apply StoreReducer) {
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wg := new(sync.WaitGroup)
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for _, cont := range c.all() {
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wg.Add(1)
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go func(container *Container) {
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apply(container)
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wg.Done()
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}(cont)
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}
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wg.Wait()
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}
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func (c *memoryStore) all() []*Container {
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c.RLock()
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containers := make([]*Container, 0, len(c.s))
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for _, cont := range c.s {
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containers = append(containers, cont)
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}
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c.RUnlock()
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return containers
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}
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var _ Store = &memoryStore{}
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