Reload license from DB for all cluster app servers (#5525)

* Reload license from DB for all cluster app servers

* Increase test timeout

app/admin.go

@@ -90,6 +90,7 @@ func InvalidateAllCachesSkipSend() {
 	store.ClearUserCaches()
 	store.ClearPostCaches()
 	store.ClearWebhookCaches()
+	LoadLicense()
 }
 
 func GetConfig() *model.Config {

app/license.go

@@ -0,0 +1,99 @@
+// Copyright (c) 2017 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package app
+
+import (
+	"strings"
+
+	l4g "github.com/alecthomas/log4go"
+	"github.com/mattermost/platform/model"
+	"github.com/mattermost/platform/utils"
+)
+
+func LoadLicense() {
+	utils.RemoveLicense()
+
+	licenseId := ""
+	if result := <-Srv.Store.System().Get(); result.Err == nil {
+		props := result.Data.(model.StringMap)
+		licenseId = props[model.SYSTEM_ACTIVE_LICENSE_ID]
+	}
+
+	if len(licenseId) != 26 {
+		l4g.Info(utils.T("mattermost.load_license.find.warn"))
+		return
+	}
+
+	if result := <-Srv.Store.License().Get(licenseId); result.Err == nil {
+		record := result.Data.(*model.LicenseRecord)
+		utils.LoadLicense([]byte(record.Bytes))
+	} else {
+		l4g.Info(utils.T("mattermost.load_license.find.warn"))
+	}
+}
+
+func SaveLicense(licenseBytes []byte) (*model.License, *model.AppError) {
+	var license *model.License
+
+	if success, licenseStr := utils.ValidateLicense(licenseBytes); success {
+		license = model.LicenseFromJson(strings.NewReader(licenseStr))
+
+		if result := <-Srv.Store.User().AnalyticsUniqueUserCount(""); result.Err != nil {
+			return nil, model.NewLocAppError("addLicense", "api.license.add_license.invalid_count.app_error", nil, result.Err.Error())
+		} else {
+			uniqueUserCount := result.Data.(int64)
+
+			if uniqueUserCount > int64(*license.Features.Users) {
+				return nil, model.NewLocAppError("addLicense", "api.license.add_license.unique_users.app_error", map[string]interface{}{"Users": *license.Features.Users, "Count": uniqueUserCount}, "")
+			}
+		}
+
+		if ok := utils.SetLicense(license); !ok {
+			return nil, model.NewLocAppError("addLicense", model.EXPIRED_LICENSE_ERROR, nil, "")
+		}
+
+		record := &model.LicenseRecord{}
+		record.Id = license.Id
+		record.Bytes = string(licenseBytes)
+		rchan := Srv.Store.License().Save(record)
+
+		sysVar := &model.System{}
+		sysVar.Name = model.SYSTEM_ACTIVE_LICENSE_ID
+		sysVar.Value = license.Id
+		schan := Srv.Store.System().SaveOrUpdate(sysVar)
+
+		if result := <-rchan; result.Err != nil {
+			RemoveLicense()
+			return nil, model.NewLocAppError("addLicense", "api.license.add_license.save.app_error", nil, "err="+result.Err.Error())
+		}
+
+		if result := <-schan; result.Err != nil {
+			RemoveLicense()
+			return nil, model.NewLocAppError("addLicense", "api.license.add_license.save_active.app_error", nil, "")
+		}
+	} else {
+		return nil, model.NewLocAppError("addLicense", model.INVALID_LICENSE_ERROR, nil, "")
+	}
+
+	InvalidateAllCaches()
+
+	return license, nil
+}
+
+func RemoveLicense() *model.AppError {
+	utils.RemoveLicense()
+
+	sysVar := &model.System{}
+	sysVar.Name = model.SYSTEM_ACTIVE_LICENSE_ID
+	sysVar.Value = ""
+
+	if result := <-Srv.Store.System().SaveOrUpdate(sysVar); result.Err != nil {
+		utils.RemoveLicense()
+		return result.Err
+	}
+
+	InvalidateAllCaches()
+
+	return nil
+}