From eca05b09aa269dda1309ee77ac750e29e71c3fd3 Mon Sep 17 00:00:00 2001
From: Lauris BH <lauris@nix.lv>
Date: Thu, 26 Oct 2017 04:37:33 +0300
Subject: Add commit count caching (#2774)

* Add commit count caching

* Small refactoring

* Add different key prefix for refs and commits

* Add configuratuion option to allow to change caching time or disable it
---
 modules/cache/cache.go | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 modules/cache/cache.go

(limited to 'modules/cache')

diff --git a/modules/cache/cache.go b/modules/cache/cache.go
new file mode 100644
index 0000000000..0a73ae8ae9
--- /dev/null
+++ b/modules/cache/cache.go
@@ -0,0 +1,72 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package cache
+
+import (
+	"code.gitea.io/gitea/modules/setting"
+
+	mc "github.com/go-macaron/cache"
+)
+
+var conn mc.Cache
+
+// NewContext start cache service
+func NewContext() error {
+	if setting.CacheService == nil || conn != nil {
+		return nil
+	}
+
+	var err error
+	conn, err = mc.NewCacher(setting.CacheService.Adapter, mc.Options{
+		Adapter:       setting.CacheService.Adapter,
+		AdapterConfig: setting.CacheService.Conn,
+		Interval:      setting.CacheService.Interval,
+	})
+	return err
+}
+
+// GetInt returns key value from cache with callback when no key exists in cache
+func GetInt(key string, getFunc func() (int, error)) (int, error) {
+	if conn == nil || setting.CacheService.TTL == 0 {
+		return getFunc()
+	}
+	if !conn.IsExist(key) {
+		var (
+			value int
+			err   error
+		)
+		if value, err = getFunc(); err != nil {
+			return value, err
+		}
+		conn.Put(key, value, int64(setting.CacheService.TTL.Seconds()))
+	}
+	return conn.Get(key).(int), nil
+}
+
+// GetInt64 returns key value from cache with callback when no key exists in cache
+func GetInt64(key string, getFunc func() (int64, error)) (int64, error) {
+	if conn == nil || setting.CacheService.TTL == 0 {
+		return getFunc()
+	}
+	if !conn.IsExist(key) {
+		var (
+			value int64
+			err   error
+		)
+		if value, err = getFunc(); err != nil {
+			return value, err
+		}
+		conn.Put(key, value, int64(setting.CacheService.TTL.Seconds()))
+	}
+	return conn.Get(key).(int64), nil
+}
+
+// Remove key from cache
+func Remove(key string) {
+	if conn == nil {
+		return
+	}
+	conn.Delete(key)
+}
-- 
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