Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/platform/services/cache/provider.go

@@ -0,0 +1,67 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package cache
+
+import (
+	"time"
+
+	"github.com/mattermost/mattermost-server/v6/model"
+)
+
+// CacheOptions contains options for initializing a cache
+type CacheOptions struct {
+	Size                   int
+	DefaultExpiry          time.Duration
+	Name                   string
+	InvalidateClusterEvent model.ClusterEvent
+	Striped                bool
+	StripedBuckets         int
+}
+
+// Provider is a provider for Cache
+type Provider interface {
+	// NewCache creates a new cache with given options.
+	NewCache(opts *CacheOptions) (Cache, error)
+	// 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, error) {
+	if opts.Striped {
+		return NewLRUStriped(LRUOptions{
+			Name:                   opts.Name,
+			Size:                   opts.Size,
+			DefaultExpiry:          opts.DefaultExpiry,
+			InvalidateClusterEvent: opts.InvalidateClusterEvent,
+			StripedBuckets:         opts.StripedBuckets,
+		})
+	}
+	return NewLRU(LRUOptions{
+		Name:                   opts.Name,
+		Size:                   opts.Size,
+		DefaultExpiry:          opts.DefaultExpiry,
+		InvalidateClusterEvent: opts.InvalidateClusterEvent,
+	}), nil
+}
+
+// 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
+}