1 files changed, 85 insertions, 0 deletions
diff --git a/modules/setting/cache.go b/modules/setting/cache.go
new file mode 100644
index 00000000..bfa6ca0e
--- /dev/null
+++ b/modules/setting/cache.go
@@ -0,0 +1,85 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package setting
+
+import (
+	"strings"
+	"time"
+
+	"code.gitea.io/gitea/modules/log"
+)
+
+// Cache represents cache settings
+type Cache struct {
+	Adapter  string
+	Interval int
+	Conn     string
+	TTL      time.Duration `ini:"ITEM_TTL"`
+}
+
+// CacheService the global cache
+var CacheService = struct {
+	Cache `ini:"cache"`
+
+	LastCommit struct {
+		TTL          time.Duration `ini:"ITEM_TTL"`
+		CommitsCount int64
+	} `ini:"cache.last_commit"`
+}{
+	Cache: Cache{
+		Adapter:  "memory",
+		Interval: 60,
+		TTL:      16 * time.Hour,
+	},
+	LastCommit: struct {
+		TTL          time.Duration `ini:"ITEM_TTL"`
+		CommitsCount int64
+	}{
+		TTL:          8760 * time.Hour,
+		CommitsCount: 1000,
+	},
+}
+
+// MemcacheMaxTTL represents the maximum memcache TTL
+const MemcacheMaxTTL = 30 * 24 * time.Hour
+
+func loadCacheFrom(rootCfg ConfigProvider) {
+	sec := rootCfg.Section("cache")
+	if err := sec.MapTo(&CacheService); err != nil {
+		log.Fatal("Failed to map Cache settings: %v", err)
+	}
+
+	CacheService.Adapter = sec.Key("ADAPTER").In("memory", []string{"memory", "redis", "memcache", "twoqueue"})
+	switch CacheService.Adapter {
+	case "memory":
+	case "redis", "memcache":
+		CacheService.Conn = strings.Trim(sec.Key("HOST").String(), "\" ")
+	case "twoqueue":
+		CacheService.Conn = strings.TrimSpace(sec.Key("HOST").String())
+		if CacheService.Conn == "" {
+			CacheService.Conn = "50000"
+		}
+	default:
+		log.Fatal("Unknown cache adapter: %s", CacheService.Adapter)
+	}
+
+	sec = rootCfg.Section("cache.last_commit")
+	CacheService.LastCommit.CommitsCount = sec.Key("COMMITS_COUNT").MustInt64(1000)
+}
+
+// TTLSeconds returns the TTLSeconds or unix timestamp for memcache
+func (c Cache) TTLSeconds() int64 {
+	if c.Adapter == "memcache" && c.TTL > MemcacheMaxTTL {
+		return time.Now().Add(c.TTL).Unix()
+	}
+	return int64(c.TTL.Seconds())
+}
+
+// LastCommitCacheTTLSeconds returns the TTLSeconds or unix timestamp for memcache
+func LastCommitCacheTTLSeconds() int64 {
+	if CacheService.Adapter == "memcache" && CacheService.LastCommit.TTL > MemcacheMaxTTL {
+		return time.Now().Add(CacheService.LastCommit.TTL).Unix()
+	}
+	return int64(CacheService.LastCommit.TTL.Seconds())
+}