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api structure simplified (breaking changes), project directory struct…
…ure refactored
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,7 @@ | ||
| # Project | ||
| .idea | ||
| vendor | ||
| mnemosyne-inpkg | ||
| _vendor-* | ||
| .tmp | ||
| bin | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| package cache | ||
|
|
||
| import ( | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/piotrkowalczuk/mnemosyne/mnemosynerpc" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
|
||
| // DefaultSize determines how big cache should be at the beginning. | ||
| const DefaultSize = 100000 | ||
|
|
||
| type Entry struct { | ||
| Ses mnemosynerpc.Session | ||
| Exp time.Time | ||
| Refresh bool | ||
| } | ||
|
|
||
| type Cache struct { | ||
| data map[uint64]*Entry | ||
| dataLock sync.RWMutex | ||
| TTL time.Duration | ||
| // monitoring | ||
| hitsTotal prometheus.Counter | ||
| missesTotal prometheus.Counter | ||
| refreshTotal prometheus.Counter | ||
| } | ||
|
|
||
| func New(ttl time.Duration, namespace string) *Cache { | ||
| return &Cache{ | ||
| TTL: ttl, | ||
| data: make(map[uint64]*Entry, DefaultSize), | ||
| hitsTotal: prometheus.NewCounter(prometheus.CounterOpts{ | ||
| Namespace: namespace, | ||
| Subsystem: "cache", | ||
| Name: "hits_total", | ||
| Help: "Total number of cache hits.", | ||
| }), | ||
| missesTotal: prometheus.NewCounter(prometheus.CounterOpts{ | ||
| Namespace: namespace, | ||
| Subsystem: "cache", | ||
| Name: "misses_total", | ||
| Help: "Total number of cache misses.", | ||
| }), | ||
| refreshTotal: prometheus.NewCounter(prometheus.CounterOpts{ | ||
| Namespace: namespace, | ||
| Subsystem: "cache", | ||
| Name: "refresh_total", | ||
| Help: "Total number of times cache Refresh.", | ||
| }), | ||
| } | ||
| } | ||
|
|
||
| func (c *Cache) Refresh(k uint64) { | ||
| c.refreshTotal.Add(1) | ||
|
|
||
| c.dataLock.Lock() | ||
| c.data[k].Refresh = true | ||
| c.dataLock.Unlock() | ||
| } | ||
|
|
||
| func (c *Cache) Put(k uint64, ses mnemosynerpc.Session) { | ||
| c.dataLock.Lock() | ||
| c.data[k] = &Entry{Ses: ses, Exp: time.Now().Add(c.TTL), Refresh: false} | ||
| c.dataLock.Unlock() | ||
| } | ||
|
|
||
| func (c *Cache) Del(k uint64) { | ||
| c.dataLock.Lock() | ||
| delete(c.data, k) | ||
| c.dataLock.Unlock() | ||
| } | ||
|
|
||
| func (c *Cache) Read(k uint64) (*Entry, bool) { | ||
| c.dataLock.RLock() | ||
| entry, ok := c.data[k] | ||
| c.dataLock.RUnlock() | ||
| if ok { | ||
| c.hitsTotal.Add(1) | ||
| } else { | ||
| c.missesTotal.Add(1) | ||
| } | ||
| return entry, ok | ||
| } | ||
|
|
||
| // Collect implements prometheus Collector interface. | ||
| func (c *Cache) Collect(in chan<- prometheus.Metric) { | ||
| c.hitsTotal.Collect(in) | ||
| c.refreshTotal.Collect(in) | ||
| c.missesTotal.Collect(in) | ||
| } | ||
|
|
||
| // Describe implements prometheus Collector interface. | ||
| func (c *Cache) Describe(in chan<- *prometheus.Desc) { | ||
| c.hitsTotal.Describe(in) | ||
| c.refreshTotal.Describe(in) | ||
| c.missesTotal.Describe(in) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| package model_test | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
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| "github.com/piotrkowalczuk/mnemosyne/internal/model" | ||
| ) | ||
|
|
||
| func TestBackpack(t *testing.T) { | ||
| b := model.Bag{} | ||
|
|
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| b.Set("key", "value") | ||
|
|
||
| if !b.Has("key") { | ||
| t.Errorf("bagpack should have specified key") | ||
| } | ||
|
|
||
| if b.Get("key") != "value" { | ||
| t.Errorf("bagpack should have specified key") | ||
| } | ||
| } | ||
|
|
||
| func TestBackpack_Scan(t *testing.T) { | ||
| b := model.Bag{"A": "B"} | ||
| val, err := b.Value() | ||
| if err != nil { | ||
| t.Fatalf("unexpected error: %s", err.Error()) | ||
| } | ||
| b.Set("A", "C") | ||
| if err = b.Scan(val); err != nil { | ||
| t.Fatalf("unexpected error: %s", err.Error()) | ||
| } | ||
| if b.Get("A") != "B" { | ||
| t.Errorf("wrong output, got %s", b.Get("A")) | ||
| } | ||
|
|
||
| exp := "unsupported data source type" | ||
| b = model.Bag{} | ||
| if err := b.Scan("data"); err != nil { | ||
| if err.Error() != exp { | ||
| t.Errorf("wrong error, expected %s but got %s", exp, err.Error()) | ||
| } | ||
| } else { | ||
| t.Error("error expected, got nil") | ||
| } | ||
| } |
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