Bump github.com/hashicorp/golang-lru from 0.5.4 to 1.0.2

go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/google/mako v0.0.0-20190821191249-122f8dcef9e3
 	github.com/google/uuid v1.3.0
 	github.com/gorilla/websocket v1.5.0
-	github.com/hashicorp/golang-lru v0.5.4
+	github.com/hashicorp/golang-lru v1.0.2
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/openzipkin/zipkin-go v0.4.1
 	github.com/prometheus/client_golang v1.16.0

go.sum

@@ -238,8 +238,8 @@ github.com/grpc-ecosystem/grpc-gateway/v2 v2.11.3 h1:lLT7ZLSzGLI08vc9cpd+tYmNWjd
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.11.3/go.mod h1:o//XUCC/F+yRGJoPO/VU0GSB0f8Nhgmxx0VIRUvaC0w=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
-github.com/hashicorp/golang-lru v0.5.4 h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
-github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
+github.com/hashicorp/golang-lru v1.0.2 h1:dV3g9Z/unq5DpblPpw+Oqcv4dU/1omnb4Ok8iPY6p1c=
+github.com/hashicorp/golang-lru v1.0.2/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
 github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/imdario/mergo v0.3.6 h1:xTNEAn+kxVO7dTZGu0CegyqKZmoWFI0rF8UxjlB2d28=

third_party/VENDOR-LICENSE/github.com/hashicorp/golang-lru/.golangci.yml

@@ -0,0 +1,30 @@
+linters:
+  enable:
+    - megacheck
+    - revive
+    - govet
+    - unconvert
+    - megacheck
+    - gas
+    - gocyclo
+    - dupl
+    - misspell
+    - unparam
+    - unused
+    - typecheck
+    - ineffassign
+    - stylecheck
+    - exportloopref
+    - gocritic
+    - nakedret
+    - gosimple
+    - prealloc
+  fast: false
+  disable-all: true
+
+issues:
+  exclude-rules:
+    - path: _test\.go
+      linters:
+        - dupl
+  exclude-use-default: false

third_party/VENDOR-LICENSE/github.com/hashicorp/golang-lru/2q.go

@@ -44,7 +44,7 @@ func New2Q(size int) (*TwoQueueCache, error) {
 
 // New2QParams creates a new TwoQueueCache using the provided
 // parameter values.
-func New2QParams(size int, recentRatio float64, ghostRatio float64) (*TwoQueueCache, error) {
+func New2QParams(size int, recentRatio, ghostRatio float64) (*TwoQueueCache, error) {
 	if size <= 0 {
 		return nil, fmt.Errorf("invalid size")
 	}
@@ -138,7 +138,6 @@ func (c *TwoQueueCache) Add(key, value interface{}) {
 	// Add to the recently seen list
 	c.ensureSpace(false)
 	c.recent.Add(key, value)
-	return
 }
 
 // ensureSpace is used to ensure we have space in the cache

third_party/VENDOR-LICENSE/github.com/hashicorp/golang-lru/LICENSE

@@ -1,3 +1,5 @@
+Copyright (c) 2014 HashiCorp, Inc.
+
 Mozilla Public License, version 2.0
 
 1. Definitions

third_party/VENDOR-LICENSE/github.com/hashicorp/golang-lru/README.md

@@ -1,25 +1,7 @@
 golang-lru
 ==========
 
-This provides the `lru` package which implements a fixed-size
-thread safe LRU cache. It is based on the cache in Groupcache.
-
-Documentation
-=============
-
-Full docs are available on [Godoc](http://godoc.org/github.com/hashicorp/golang-lru)
-
-Example
-=======
-
-Using the LRU is very simple:
-
-```go
-l, _ := New(128)
-for i := 0; i < 256; i++ {
-    l.Add(i, nil)
-}
-if l.Len() != 128 {
-    panic(fmt.Sprintf("bad len: %v", l.Len()))
-}
-```
+Please upgrade to github.com/hashicorp/golang-lru/v2 for all new code as v1 will
+not be updated anymore. The v2 version supports generics and is faster; old code
+can specify a specific tag, e.g. github.com/hashicorp/golang-lru/v1.0.2 for
+backwards compatibility.

third_party/VENDOR-LICENSE/github.com/hashicorp/golang-lru/arc.go

@@ -173,7 +173,6 @@ func (c *ARCCache) Add(key, value interface{}) {
 
 	// Add to the recently seen list
 	c.t1.Add(key, value)
-	return
 }
 
 // replace is used to adaptively evict from either T1 or T2

third_party/VENDOR-LICENSE/github.com/hashicorp/golang-lru/lru.go

@@ -6,10 +6,17 @@ import (
 	"github.com/hashicorp/golang-lru/simplelru"
 )
 
+const (
+	// DefaultEvictedBufferSize defines the default buffer size to store evicted key/val
+	DefaultEvictedBufferSize = 16
+)
+
 // Cache is a thread-safe fixed size LRU cache.
 type Cache struct {
-	lru  simplelru.LRUCache
-	lock sync.RWMutex
+	lru                      *simplelru.LRU
+	evictedKeys, evictedVals []interface{}
+	onEvictedCB              func(k, v interface{})
+	lock                     sync.RWMutex
 }
 
 // New creates an LRU of the given size.
@@ -19,30 +26,63 @@ func New(size int) (*Cache, error) {
 
 // NewWithEvict constructs a fixed size cache with the given eviction
 // callback.
-func NewWithEvict(size int, onEvicted func(key interface{}, value interface{})) (*Cache, error) {
-	lru, err := simplelru.NewLRU(size, simplelru.EvictCallback(onEvicted))
-	if err != nil {
-		return nil, err
+func NewWithEvict(size int, onEvicted func(key, value interface{})) (c *Cache, err error) {
+	// create a cache with default settings
+	c = &Cache{
+		onEvictedCB: onEvicted,
 	}
-	c := &Cache{
-		lru: lru,
+	if onEvicted != nil {
+		c.initEvictBuffers()
+		onEvicted = c.onEvicted
 	}
-	return c, nil
+	c.lru, err = simplelru.NewLRU(size, onEvicted)
+	return
+}
+
+func (c *Cache) initEvictBuffers() {
+	c.evictedKeys = make([]interface{}, 0, DefaultEvictedBufferSize)
+	c.evictedVals = make([]interface{}, 0, DefaultEvictedBufferSize)
+}
+
+// onEvicted save evicted key/val and sent in externally registered callback
+// outside of critical section
+func (c *Cache) onEvicted(k, v interface{}) {
+	c.evictedKeys = append(c.evictedKeys, k)
+	c.evictedVals = append(c.evictedVals, v)
 }
 
 // Purge is used to completely clear the cache.
 func (c *Cache) Purge() {
+	var ks, vs []interface{}
 	c.lock.Lock()
 	c.lru.Purge()
+	if c.onEvictedCB != nil && len(c.evictedKeys) > 0 {
+		ks, vs = c.evictedKeys, c.evictedVals
+		c.initEvictBuffers()
+	}
 	c.lock.Unlock()
+	// invoke callback outside of critical section
+	if c.onEvictedCB != nil {
+		for i := 0; i < len(ks); i++ {
+			c.onEvictedCB(ks[i], vs[i])
+		}
+	}
 }
 
 // Add adds a value to the cache. Returns true if an eviction occurred.
 func (c *Cache) Add(key, value interface{}) (evicted bool) {
+	var k, v interface{}
 	c.lock.Lock()
 	evicted = c.lru.Add(key, value)
+	if c.onEvictedCB != nil && evicted {
+		k, v = c.evictedKeys[0], c.evictedVals[0]
+		c.evictedKeys, c.evictedVals = c.evictedKeys[:0], c.evictedVals[:0]
+	}
 	c.lock.Unlock()
-	return evicted
+	if c.onEvictedCB != nil && evicted {
+		c.onEvictedCB(k, v)
+	}
+	return
 }
 
 // Get looks up a key's value from the cache.
@@ -75,61 +115,102 @@ func (c *Cache) Peek(key interface{}) (value interface{}, ok bool) {
 // recent-ness or deleting it for being stale, and if not, adds the value.
 // Returns whether found and whether an eviction occurred.
 func (c *Cache) ContainsOrAdd(key, value interface{}) (ok, evicted bool) {
+	var k, v interface{}
 	c.lock.Lock()
-	defer c.lock.Unlock()
-
 	if c.lru.Contains(key) {
+		c.lock.Unlock()
 		return true, false
 	}
 	evicted = c.lru.Add(key, value)
+	if c.onEvictedCB != nil && evicted {
+		k, v = c.evictedKeys[0], c.evictedVals[0]
+		c.evictedKeys, c.evictedVals = c.evictedKeys[:0], c.evictedVals[:0]
+	}
+	c.lock.Unlock()
+	if c.onEvictedCB != nil && evicted {
+		c.onEvictedCB(k, v)
+	}
 	return false, evicted
 }
 
 // PeekOrAdd checks if a key is in the cache without updating the
 // recent-ness or deleting it for being stale, and if not, adds the value.
 // Returns whether found and whether an eviction occurred.
 func (c *Cache) PeekOrAdd(key, value interface{}) (previous interface{}, ok, evicted bool) {
+	var k, v interface{}
 	c.lock.Lock()
-	defer c.lock.Unlock()
-
 	previous, ok = c.lru.Peek(key)
 	if ok {
+		c.lock.Unlock()
 		return previous, true, false
 	}
-
 	evicted = c.lru.Add(key, value)
+	if c.onEvictedCB != nil && evicted {
+		k, v = c.evictedKeys[0], c.evictedVals[0]
+		c.evictedKeys, c.evictedVals = c.evictedKeys[:0], c.evictedVals[:0]
+	}
+	c.lock.Unlock()
+	if c.onEvictedCB != nil && evicted {
+		c.onEvictedCB(k, v)
+	}
 	return nil, false, evicted
 }
 
 // Remove removes the provided key from the cache.
 func (c *Cache) Remove(key interface{}) (present bool) {
+	var k, v interface{}
 	c.lock.Lock()
 	present = c.lru.Remove(key)
+	if c.onEvictedCB != nil && present {
+		k, v = c.evictedKeys[0], c.evictedVals[0]
+		c.evictedKeys, c.evictedVals = c.evictedKeys[:0], c.evictedVals[:0]
+	}
 	c.lock.Unlock()
+	if c.onEvictedCB != nil && present {
+		c.onEvictedCB(k, v)
+	}
 	return
 }
 
 // Resize changes the cache size.
 func (c *Cache) Resize(size int) (evicted int) {
+	var ks, vs []interface{}
 	c.lock.Lock()
 	evicted = c.lru.Resize(size)
+	if c.onEvictedCB != nil && evicted > 0 {
+		ks, vs = c.evictedKeys, c.evictedVals
+		c.initEvictBuffers()
+	}
 	c.lock.Unlock()
+	if c.onEvictedCB != nil && evicted > 0 {
+		for i := 0; i < len(ks); i++ {
+			c.onEvictedCB(ks[i], vs[i])
+		}
+	}
 	return evicted
 }
 
 // RemoveOldest removes the oldest item from the cache.
-func (c *Cache) RemoveOldest() (key interface{}, value interface{}, ok bool) {
+func (c *Cache) RemoveOldest() (key, value interface{}, ok bool) {
+	var k, v interface{}
 	c.lock.Lock()
 	key, value, ok = c.lru.RemoveOldest()
+	if c.onEvictedCB != nil && ok {
+		k, v = c.evictedKeys[0], c.evictedVals[0]
+		c.evictedKeys, c.evictedVals = c.evictedKeys[:0], c.evictedVals[:0]
+	}
 	c.lock.Unlock()
+	if c.onEvictedCB != nil && ok {
+		c.onEvictedCB(k, v)
+	}
 	return
 }
 
 // GetOldest returns the oldest entry
-func (c *Cache) GetOldest() (key interface{}, value interface{}, ok bool) {
-	c.lock.Lock()
+func (c *Cache) GetOldest() (key, value interface{}, ok bool) {
+	c.lock.RLock()
 	key, value, ok = c.lru.GetOldest()
-	c.lock.Unlock()
+	c.lock.RUnlock()
 	return
 }
 

third_party/VENDOR-LICENSE/github.com/hashicorp/golang-lru/simplelru/lru.go

@@ -25,7 +25,7 @@ type entry struct {
 // NewLRU constructs an LRU of the given size
 func NewLRU(size int, onEvict EvictCallback) (*LRU, error) {
 	if size <= 0 {
-		return nil, errors.New("Must provide a positive size")
+		return nil, errors.New("must provide a positive size")
 	}
 	c := &LRU{
 		size:      size,
@@ -109,7 +109,7 @@ func (c *LRU) Remove(key interface{}) (present bool) {
 }
 
 // RemoveOldest removes the oldest item from the cache.
-func (c *LRU) RemoveOldest() (key interface{}, value interface{}, ok bool) {
+func (c *LRU) RemoveOldest() (key, value interface{}, ok bool) {
 	ent := c.evictList.Back()
 	if ent != nil {
 		c.removeElement(ent)
@@ -120,7 +120,7 @@ func (c *LRU) RemoveOldest() (key interface{}, value interface{}, ok bool) {
 }
 
 // GetOldest returns the oldest entry
-func (c *LRU) GetOldest() (key interface{}, value interface{}, ok bool) {
+func (c *LRU) GetOldest() (key, value interface{}, ok bool) {
 	ent := c.evictList.Back()
 	if ent != nil {
 		kv := ent.Value.(*entry)

third_party/VENDOR-LICENSE/github.com/hashicorp/golang-lru/simplelru/lru_interface.go

@@ -1,3 +1,4 @@
+// Package simplelru provides simple LRU implementation based on build-in container/list.
 package simplelru
 
 // LRUCache is the interface for simple LRU cache.
@@ -34,6 +35,6 @@ type LRUCache interface {
 	// Clears all cache entries.
 	Purge()
 
-  // Resizes cache, returning number evicted
-  Resize(int) int
+	// Resizes cache, returning number evicted
+	Resize(int) int
 }

third_party/VENDOR-LICENSE/github.com/hashicorp/golang-lru/testing.go

@@ -0,0 +1,16 @@
+package lru
+
+import (
+	"crypto/rand"
+	"math"
+	"math/big"
+	"testing"
+)
+
+func getRand(tb testing.TB) int64 {
+	out, err := rand.Int(rand.Reader, big.NewInt(math.MaxInt64))
+	if err != nil {
+		tb.Fatal(err)
+	}
+	return out.Int64()
+}