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service-options.go
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service-options.go
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/*
* Copyright (c) 2018. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
package service
import (
"context"
"net/http"
"regexp"
"github.com/micro/go-micro"
"github.com/micro/go-web"
"github.com/spf13/pflag"
"github.com/pydio/cells/common"
"github.com/pydio/cells/common/dao"
"github.com/pydio/cells/common/registry"
"github.com/pydio/cells/common/service/frontend"
)
type dependency struct {
Name string
Tag []string
}
// ServiceOptions stores all options for a pydio service
type ServiceOptions struct {
Name string
Tags []string
Version string
Description string
Source string
Context context.Context
Cancel context.CancelFunc
DAO func(dao.DAO) dao.DAO
Prefix interface{}
Migrations []*Migration
Port string
Micro micro.Service
Web web.Service
Dependencies []*dependency
// Starting options
AutoStart bool
Fork bool
Unique bool
Cluster registry.Cluster
Registry registry.Registry
Regexp *regexp.Regexp
Flags pflag.FlagSet
Checker Checker
MinNumberOfNodes int
// Before and After funcs
BeforeInit []func(Service) error
AfterInit []func(Service) error
BeforeStart []func(Service) error
AfterStart []func(Service) error
BeforeStop []func(Service) error
AfterStop []func(Service) error
OnRegexpMatch func(Service, []string) error
// Micro init
MicroInit func(Service) error
// Web init
WebInit func(Service) error
webHandlerWraps []func(http.Handler) http.Handler
// Watcher
Watchers []func(common.ConfigValues)
}
type ServiceOption func(*ServiceOptions)
func newOptions(opts ...ServiceOption) ServiceOptions {
opt := ServiceOptions{}
opt.Registry = registry.Default
opt.AutoStart = true
for _, o := range opts {
o(&opt)
}
return opt
}
func Name(n string) ServiceOption {
return func(o *ServiceOptions) {
o.Name = n
}
}
func Version(v string) ServiceOption {
return func(o *ServiceOptions) {
o.Version = v
}
}
func Migrations(migrations []*Migration) ServiceOption {
return func(o *ServiceOptions) {
o.Migrations = migrations
}
}
func Tag(t ...string) ServiceOption {
return func(o *ServiceOptions) {
o.Tags = append(o.Tags, t...)
}
}
func Description(d string) ServiceOption {
return func(o *ServiceOptions) {
o.Description = d
}
}
func Source(s string) ServiceOption {
return func(o *ServiceOptions) {
o.Source = s
}
}
func Context(c context.Context) ServiceOption {
return func(o *ServiceOptions) {
o.Context = c
}
}
func Cancel(c context.CancelFunc) ServiceOption {
return func(o *ServiceOptions) {
o.Cancel = c
}
}
func Regexp(r string) ServiceOption {
return func(o *ServiceOptions) {
o.Name = r // We temporary save the regexp as name to ensure it's different from one service to another
o.Regexp = regexp.MustCompile(r)
}
}
func Port(p string) ServiceOption {
return func(o *ServiceOptions) {
o.Port = p
}
}
func WithChecker(c Checker) ServiceOption {
return func(o *ServiceOptions) {
o.Checker = c
}
}
func AutoStart(b bool) ServiceOption {
return func(o *ServiceOptions) {
o.AutoStart = b
}
}
func Fork(b bool) ServiceOption {
return func(o *ServiceOptions) {
o.Fork = b
}
}
func Unique(b bool) ServiceOption {
return func(o *ServiceOptions) {
o.Unique = b
}
}
func Cluster(c registry.Cluster) ServiceOption {
return func(o *ServiceOptions) {
o.Cluster = c
}
}
func Dependency(n string, t []string) ServiceOption {
return func(o *ServiceOptions) {
o.Dependencies = append(o.Dependencies, &dependency{n, t})
}
}
func RouterDependencies() ServiceOption {
return func(o *ServiceOptions) {
routerDependencies := []string{
common.SERVICE_TREE,
common.SERVICE_ACL,
common.SERVICE_VERSIONS,
common.SERVICE_DOCSTORE,
}
for _, s := range routerDependencies {
o.Dependencies = append(o.Dependencies, &dependency{common.SERVICE_GRPC_NAMESPACE_ + s, []string{}})
}
}
}
func PluginBoxes(boxes ...frontend.PluginBox) ServiceOption {
return func(o *ServiceOptions) {
o.Dependencies = append(o.Dependencies, &dependency{common.SERVICE_WEB_NAMESPACE_ + common.SERVICE_FRONT_STATICS, []string{}})
frontend.RegisterPluginBoxes(boxes...)
}
}
// Before and Afters
func BeforeInit(fn func(Service) error) ServiceOption {
return func(o *ServiceOptions) {
o.BeforeInit = append(o.BeforeInit, fn)
}
}
func AfterInit(fn func(Service) error) ServiceOption {
return func(o *ServiceOptions) {
o.AfterInit = append(o.AfterInit, fn)
}
}
func BeforeStart(fn func(Service) error) ServiceOption {
return func(o *ServiceOptions) {
o.BeforeStart = append(o.BeforeStart, fn)
}
}
func BeforeStop(fn func(Service) error) ServiceOption {
return func(o *ServiceOptions) {
o.BeforeStop = append(o.BeforeStop, fn)
}
}
func AfterStart(fn func(Service) error) ServiceOption {
return func(o *ServiceOptions) {
o.AfterStart = append(o.AfterStart, fn)
}
}
func AfterStop(fn func(Service) error) ServiceOption {
return func(o *ServiceOptions) {
o.AfterStop = append(o.AfterStop, fn)
}
}
func Watch(fn func(common.ConfigValues)) ServiceOption {
return func(o *ServiceOptions) {
o.Watchers = append(o.Watchers, fn)
}
}