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feat: Add DialCache for key-based connection caching #391

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merged 7 commits into from
Jul 21, 2021
Merged

feat: Add DialCache for key-based connection caching #391

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91c4f66
feat: Add DialCache for key-based connection caching
kylecarbs Jul 20, 2021
857a743
Remove DialOptions
kylecarbs Jul 20, 2021
0af7789
Move DialFunc to Dial
kylecarbs Jul 21, 2021
6aa8048
Add WS options to dial
kylecarbs Jul 21, 2021
b0c0167
Requested changes
kylecarbs Jul 21, 2021
1199814
Add comment
kylecarbs Jul 21, 2021
844385e
Fixup
kylecarbs Jul 21, 2021
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Remove DialOptions
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@kylecarbs
kylecarbs committed Jul 20, 2021
commit 857a743c14f57ef75d9705daa60473397cdfb5fe
6 changes: 3 additions & 3 deletions wsnet/cache.go
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ import (
)

// dialerFunc is used to reference a dialer returned for caching.
type dialerFunc func(ctx context.Context, key string, options *DialOptions) (*Dialer, error)
type dialerFunc func(ctx context.Context, key string) (*Dialer, error)

// DialCache constructs a new DialerCache.
// The cache clears connections that:
Expand Down Expand Up @@ -98,7 +98,7 @@ func (d *DialerCache) evict() {

// Dial returns a Dialer from the cache if one exists with the key provided,
// or dials a new connection using the dialerFunc.
func (d *DialerCache) Dial(ctx context.Context, key string, options *DialOptions) (*Dialer, bool, error) {
func (d *DialerCache) Dial(ctx context.Context, key string) (*Dialer, bool, error) {
d.mut.RLock()
if dialer, ok := d.dialers[key]; ok {
closed := false
Expand All @@ -119,7 +119,7 @@ func (d *DialerCache) Dial(ctx context.Context, key string, options *DialOptions
d.mut.RUnlock()

dialer, err, _ := d.flightGroup.Do(key, func() (interface{}, error) {
dialer, err := d.dialerFunc(ctx, key, options)
dialer, err := d.dialerFunc(ctx, key)
if err != nil {
return nil, err
}
Expand Down
24 changes: 12 additions & 12 deletions wsnet/cache_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -16,13 +16,13 @@ func TestCache(t *testing.T) {
require.NoError(t, err)
defer l.Close()

cache := DialCache(time.Hour, func(ctx context.Context, key string, options *DialOptions) (*Dialer, error) {
return DialWebsocket(ctx, connectAddr, options)
cache := DialCache(time.Hour, func(ctx context.Context, key string) (*Dialer, error) {
return DialWebsocket(ctx, connectAddr, nil)
})
_, cached, err := cache.Dial(context.Background(), "example", nil)
_, cached, err := cache.Dial(context.Background(), "example")
require.NoError(t, err)
require.Equal(t, cached, false)
_, cached, err = cache.Dial(context.Background(), "example", nil)
_, cached, err = cache.Dial(context.Background(), "example")
require.NoError(t, err)
require.Equal(t, cached, true)
})
Expand All @@ -33,15 +33,15 @@ func TestCache(t *testing.T) {
require.NoError(t, err)
defer l.Close()

cache := DialCache(time.Hour, func(ctx context.Context, key string, options *DialOptions) (*Dialer, error) {
return DialWebsocket(ctx, connectAddr, options)
cache := DialCache(time.Hour, func(ctx context.Context, key string) (*Dialer, error) {
return DialWebsocket(ctx, connectAddr, nil)
})

conn, cached, err := cache.Dial(context.Background(), "example", nil)
conn, cached, err := cache.Dial(context.Background(), "example")
require.NoError(t, err)
require.Equal(t, cached, false)
require.NoError(t, conn.Close())
_, cached, err = cache.Dial(context.Background(), "example", nil)
_, cached, err = cache.Dial(context.Background(), "example")
require.NoError(t, err)
require.Equal(t, cached, false)
})
Expand All @@ -52,15 +52,15 @@ func TestCache(t *testing.T) {
require.NoError(t, err)
defer l.Close()

cache := DialCache(0, func(ctx context.Context, key string, options *DialOptions) (*Dialer, error) {
return DialWebsocket(ctx, connectAddr, options)
cache := DialCache(0, func(ctx context.Context, key string) (*Dialer, error) {
return DialWebsocket(ctx, connectAddr, nil)
})

_, cached, err := cache.Dial(context.Background(), "example", nil)
_, cached, err := cache.Dial(context.Background(), "example")
require.NoError(t, err)
require.Equal(t, cached, false)
cache.evict()
_, cached, err = cache.Dial(context.Background(), "example", nil)
_, cached, err = cache.Dial(context.Background(), "example")
require.NoError(t, err)
require.Equal(t, cached, false)
})
Expand Down