limit the number of workers of the jsoncs3 share manager

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

services/sharing/pkg/config/config.go

@@ -106,6 +106,7 @@ type UserSharingJSONCS3Driver struct {
 	SystemUserIDP    string `yaml:"system_user_idp" env:"OCIS_SYSTEM_USER_IDP;SHARING_USER_JSONCS3_SYSTEM_USER_IDP" desc:"IDP of the oCIS STORAGE-SYSTEM system user." introductionVersion:"pre5.0"`
 	SystemUserAPIKey string `yaml:"system_user_api_key" env:"OCIS_SYSTEM_USER_API_KEY;SHARING_USER_JSONCS3_SYSTEM_USER_API_KEY" desc:"API key for the STORAGE-SYSTEM system user." introductionVersion:"pre5.0"`
 	CacheTTL         int    `yaml:"cache_ttl" env:"SHARING_USER_JSONCS3_CACHE_TTL" desc:"TTL for the internal caches in seconds." introductionVersion:"pre5.0"`
+	MaxConcurrency   int    `yaml:"max_concurrency" env:"SHARING_USER_JSONCS3_MAX_CONCURRENCY" desc:"Maximum number of workers for requests to the storage system." introductionVersion:"7.0.0"`
 }
 type PublicSharingDrivers struct {
 	JSON    PublicSharingJSONDriver    `yaml:"json"`

services/sharing/pkg/config/defaults/defaultconfig.go

@@ -45,8 +45,9 @@ func DefaultConfig() *config.Config {
 				SystemUserIDP: "internal",
 			},
 			JSONCS3: config.UserSharingJSONCS3Driver{
-				ProviderAddr:  "com.owncloud.api.storage-system",
-				SystemUserIDP: "internal",
+				ProviderAddr:   "com.owncloud.api.storage-system",
+				SystemUserIDP:  "internal",
+				MaxConcurrency: 5,
 			},
 			OwnCloudSQL: config.UserSharingOwnCloudSQLDriver{
 				DBUsername: "owncloud",