// Copyright 2019 The Gitea Authors. All rights reserved.// Use of this source code is governed by a MIT-style// license that can be found in the LICENSE file. package queue import (	"fmt"	"strings" 	"code.gitea.io/gitea/modules/json"	"code.gitea.io/gitea/modules/log"	"code.gitea.io/gitea/modules/setting") func validType(t string) (Type, error) {	if len(t) == 0 {		return PersistableChannelQueueType, nil	}	for _, typ := range RegisteredTypes() {		if t == string(typ) {			return typ, nil		}	}	return PersistableChannelQueueType, fmt.Errorf("Unknown queue type: %s defaulting to %s", t, string(PersistableChannelQueueType))} func getQueueSettings(name string) (setting.QueueSettings, []byte) {	q := setting.GetQueueSettings(name)	cfg, err := json.Marshal(q)	if err != nil {		log.Error("Unable to marshall generic options: %v Error: %v", q, err)		log.Error("Unable to create queue for %s", name, err)		return q, []byte{}	}	return q, cfg} // CreateQueue for name with provided handler and exemplarfunc CreateQueue(name string, handle HandlerFunc, exemplar interface{}) Queue {	q, cfg := getQueueSettings(name)	if len(cfg) == 0 {		return nil	} 	typ, err := validType(q.Type)	if err != nil {		log.Error("Invalid type %s provided for queue named %s defaulting to %s", q.Type, name, string(typ))	} 	returnable, err := NewQueue(typ, handle, cfg, exemplar)	if q.WrapIfNecessary && err != nil {		log.Warn("Unable to create queue for %s: %v", name, err)		log.Warn("Attempting to create wrapped queue")		returnable, err = NewQueue(WrappedQueueType, handle, WrappedQueueConfiguration{			Underlying:  typ,			Timeout:     q.Timeout,			MaxAttempts: q.MaxAttempts,			Config:      cfg,			QueueLength: q.QueueLength,			Name:        name,		}, exemplar)	}	if err != nil {		log.Error("Unable to create queue for %s: %v", name, err)		return nil	}	return returnable} // CreateUniqueQueue for name with provided handler and exemplarfunc CreateUniqueQueue(name string, handle HandlerFunc, exemplar interface{}) UniqueQueue {	q, cfg := getQueueSettings(name)	if len(cfg) == 0 {		return nil	} 	if len(q.Type) > 0 && q.Type != "dummy" && q.Type != "immediate" && !strings.HasPrefix(q.Type, "unique-") {		q.Type = "unique-" + q.Type	} 	typ, err := validType(q.Type)	if err != nil || typ == PersistableChannelQueueType {		typ = PersistableChannelUniqueQueueType		if err != nil {			log.Error("Invalid type %s provided for queue named %s defaulting to %s", q.Type, name, string(typ))		}	} 	returnable, err := NewQueue(typ, handle, cfg, exemplar)	if q.WrapIfNecessary && err != nil {		log.Warn("Unable to create unique queue for %s: %v", name, err)		log.Warn("Attempting to create wrapped queue")		returnable, err = NewQueue(WrappedUniqueQueueType, handle, WrappedUniqueQueueConfiguration{			Underlying:  typ,			Timeout:     q.Timeout,			MaxAttempts: q.MaxAttempts,			Config:      cfg,			QueueLength: q.QueueLength,		}, exemplar)	}	if err != nil {		log.Error("Unable to create unique queue for %s: %v", name, err)		return nil	}	return returnable.(UniqueQueue)}