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Get now returns the *Item rather than the item's value. Get no longer actively

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purges stale items.

Combining these two changes, CCache can now be used to implement both of
Varnish's grace and saint mode.
This commit is contained in:
Karl Seguin
2014-10-25 17:15:47 +07:00
parent 3a00ce8f0a
commit 77765a3f11
7 changed files with 124 additions and 66 deletions
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34
layeredcache_test.go
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@@ -21,7 +21,7 @@ func (l *LayeredCacheTests) GetsANonExistantValue() {
func (l *LayeredCacheTests) SetANewValue() {
cache := newLayered()
cache.Set("spice", "flow", "a value", time.Minute)
Expect(cache.Get("spice", "flow").(string)).To.Equal("a value")
Expect(cache.Get("spice", "flow").Value()).To.Equal("a value")
Expect(cache.Get("spice", "stop")).To.Equal(nil)
}
@@ -30,11 +30,11 @@ func (l *LayeredCacheTests) SetsMultipleValueWithinTheSameLayer() {
cache.Set("spice", "flow", "value-a", time.Minute)
cache.Set("spice", "must", "value-b", time.Minute)
cache.Set("leto", "sister", "ghanima", time.Minute)
Expect(cache.Get("spice", "flow").(string)).To.Equal("value-a")
Expect(cache.Get("spice", "must").(string)).To.Equal("value-b")
Expect(cache.Get("spice", "flow").Value()).To.Equal("value-a")
Expect(cache.Get("spice", "must").Value()).To.Equal("value-b")
Expect(cache.Get("spice", "worm")).To.Equal(nil)
Expect(cache.Get("leto", "sister").(string)).To.Equal("ghanima")
Expect(cache.Get("leto", "sister").Value()).To.Equal("ghanima")
Expect(cache.Get("leto", "brother")).To.Equal(nil)
Expect(cache.Get("baron", "friend")).To.Equal(nil)
}
@@ -46,9 +46,9 @@ func (l *LayeredCacheTests) DeletesAValue() {
cache.Set("leto", "sister", "ghanima", time.Minute)
cache.Delete("spice", "flow")
Expect(cache.Get("spice", "flow")).To.Equal(nil)
Expect(cache.Get("spice", "must").(string)).To.Equal("value-b")
Expect(cache.Get("spice", "must").Value()).To.Equal("value-b")
Expect(cache.Get("spice", "worm")).To.Equal(nil)
Expect(cache.Get("leto", "sister").(string)).To.Equal("ghanima")
Expect(cache.Get("leto", "sister").Value()).To.Equal("ghanima")
}
func (l *LayeredCacheTests) DeletesALayer() {
@@ -60,7 +60,7 @@ func (l *LayeredCacheTests) DeletesALayer() {
Expect(cache.Get("spice", "flow")).To.Equal(nil)
Expect(cache.Get("spice", "must")).To.Equal(nil)
Expect(cache.Get("spice", "worm")).To.Equal(nil)
Expect(cache.Get("leto", "sister").(string)).To.Equal("ghanima")
Expect(cache.Get("leto", "sister").Value()).To.Equal("ghanima")
}
func (c *LayeredCacheTests) GCsTheOldestItems() {
@@ -74,10 +74,10 @@ func (c *LayeredCacheTests) GCsTheOldestItems() {
time.Sleep(time.Millisecond * 10)
cache.gc()
Expect(cache.Get("xx", "a")).To.Equal(nil)
Expect(cache.Get("xx", "b").(int)).To.Equal(9001)
Expect(cache.Get("xx", "b").Value()).To.Equal(9001)
Expect(cache.Get("8", "a")).To.Equal(nil)
Expect(cache.Get("9", "a")).To.Equal(9)
Expect(cache.Get("10", "a").(int)).To.Equal(10)
Expect(cache.Get("9", "a").Value()).To.Equal(9)
Expect(cache.Get("10", "a").Value()).To.Equal(10)
}
func (c *LayeredCacheTests) PromotedItemsDontGetPruned() {
@@ -89,9 +89,9 @@ func (c *LayeredCacheTests) PromotedItemsDontGetPruned() {
cache.Get("9", "a")
time.Sleep(time.Millisecond * 10)
cache.gc()
Expect(cache.Get("9", "a").(int)).To.Equal(9)
Expect(cache.Get("9", "a").Value()).To.Equal(9)
Expect(cache.Get("10", "a")).To.Equal(nil)
Expect(cache.Get("11", "a").(int)).To.Equal(11)
Expect(cache.Get("11", "a").Value()).To.Equal(11)
}
func (c *LayeredCacheTests) TrackerDoesNotCleanupHeldInstance() {
@@ -102,7 +102,7 @@ func (c *LayeredCacheTests) TrackerDoesNotCleanupHeldInstance() {
item := cache.TrackingGet("0", "a")
time.Sleep(time.Millisecond * 10)
cache.gc()
Expect(cache.Get("0", "a").(int)).To.Equal(0)
Expect(cache.Get("0", "a").Value()).To.Equal(0)
Expect(cache.Get("1", "a")).To.Equal(nil)
item.Release()
cache.gc()
@@ -121,10 +121,14 @@ func (c *LayeredCacheTests) RemovesOldestItemWhenFull() {
Expect(cache.Get("0", "a")).To.Equal(nil)
Expect(cache.Get("1", "a")).To.Equal(nil)
Expect(cache.Get("2", "a")).To.Equal(nil)
Expect(cache.Get("3", "a")).To.Equal(3)
Expect(cache.Get("xx", "b")).To.Equal(9001)
Expect(cache.Get("3", "a").Value()).To.Equal(3)
Expect(cache.Get("xx", "b").Value()).To.Equal(9001)
}
// func (c *LayeredCacheTests) GetsAnExpiredIten() {
// }
func newLayered() *LayeredCache {
return Layered(Configure())
}