move cache2 package to cache (#14921)

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

services/cache/provider.go

@@ -0,0 +1,52 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package cache
+
+import "time"
+
+// CacheOptions contains options for initializaing a cache
+type CacheOptions struct {
+	Size                   int
+	DefaultExpiry          time.Duration
+	Name                   string
+	InvalidateClusterEvent string
+}
+
+// Provider is a provider for Cache
+type Provider interface {
+	// NewCache creates a new cache with given options.
+	NewCache(opts *CacheOptions) Cache
+	// Connect opens a new connection to the cache using specific provider parameters.
+	Connect() error
+	// Close releases any resources used by the cache provider.
+	Close() error
+}
+
+type cacheProvider struct {
+}
+
+// NewProvider creates a new CacheProvider
+func NewProvider() Provider {
+	return &cacheProvider{}
+}
+
+// NewCache creates a new cache with given opts
+func (c *cacheProvider) NewCache(opts *CacheOptions) Cache {
+	return NewLRU(&LRUOptions{
+		Name:                   opts.Name,
+		Size:                   opts.Size,
+		DefaultExpiry:          opts.DefaultExpiry,
+		InvalidateClusterEvent: opts.InvalidateClusterEvent,
+	})
+}
+
+// Connect opens a new connection to the cache using specific provider parameters.
+func (c *cacheProvider) Connect() error {
+	return nil
+}
+
+// Close releases any resources used by the cache provider.
+func (c *cacheProvider) Close() error {
+	return nil
+}