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service-micro.go
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service-micro.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 (
"time"
"github.com/micro/cli"
"github.com/micro/go-micro"
"github.com/micro/go-micro/cmd"
"github.com/micro/go-micro/selector"
"github.com/micro/go-micro/selector/cache"
"github.com/micro/go-micro/server"
"github.com/pydio/cells/common"
"github.com/pydio/cells/common/log"
defaults "github.com/pydio/cells/common/micro"
"github.com/pydio/cells/common/micro/server/grpc"
"github.com/pydio/cells/common/registry"
servicecontext "github.com/pydio/cells/common/service/context"
proto "github.com/pydio/cells/common/service/proto"
)
var (
slctr = cache.NewSelector(selector.Registry(defaults.Registry()))
command = &Cmd{}
)
// Cmd definition to pass as default for a micro server
type Cmd struct{}
// App for default cmd
func (c *Cmd) App() *cli.App {
return nil
}
// Init for default cmd
func (c *Cmd) Init(opts ...cmd.Option) error {
return nil
}
// Options for default cmd
func (c *Cmd) Options() cmd.Options {
return cmd.Options{}
}
// Micro service option
func Micro(m micro.Service) ServiceOption {
return func(o *ServiceOptions) {
o.Micro = m
}
}
// WithMicro adds a micro service handler to the current service
func WithMicro(f func(micro.Service) error) ServiceOption {
return func(o *ServiceOptions) {
o.Version = common.Version().String()
o.MicroInit = func(s Service) error {
svc := micro.NewService(
micro.Version(o.Version),
micro.Cmd(command),
)
name := s.Name()
ctx := servicecontext.WithServiceName(s.Options().Context, name)
var srvOpts []server.Option
if o.Port != "" {
srvOpts = append(srvOpts, server.Address(":"+o.Port))
}
if o.TLSConfig != nil {
srvOpts = append(srvOpts, grpc.AuthTLS(o.TLSConfig))
}
srvOpts = append(srvOpts, server.Version(o.Version))
srv := defaults.NewServer(srvOpts...)
svc.Init(
micro.Client(defaults.NewClient()),
micro.Server(srv),
micro.Registry(defaults.Registry()),
// micro.RegisterTTL(time.Second*30),
// micro.RegisterInterval(time.Second*10),
micro.RegisterTTL(10*time.Minute),
micro.RegisterInterval(5*time.Minute),
micro.Transport(defaults.Transport()),
micro.Broker(defaults.Broker()),
)
meta := registry.BuildServiceMeta()
meta["description"] = o.Description
if s.Options().Source != "" {
meta["source"] = s.Options().Source
}
// context is always added last - so that there is no override
svc.Init(
micro.Context(ctx),
micro.Name(name),
micro.WrapClient(servicecontext.SpanClientWrapper),
micro.WrapHandler(servicecontext.SpanHandlerWrapper),
micro.WrapSubscriber(servicecontext.SpanSubscriberWrapper),
micro.Metadata(meta),
micro.BeforeStart(func() error {
return f(svc)
}),
micro.AfterStart(func() error {
log.Logger(ctx).Info("started")
return nil
}),
micro.BeforeStop(func() error {
log.Logger(ctx).Info("stopping")
return nil
}),
micro.AfterStart(func() error {
return UpdateServiceVersion(s)
}),
)
// newTracer(name, &options)
servicecontext.NewMetricsWrapper(svc)
newBackoffer(svc)
newConfigProvider(svc)
newDBProvider(svc)
newLogProvider(svc)
// newTraceProvider(s.Options().Micro) // DISABLED FOR NOW DUE TO CONFLICT WITH THE MICRO GO OS
newClaimsProvider(svc)
proto.RegisterServiceHandler(srv, &StatusHandler{s.Address()})
micro.RegisterSubscriber(common.TopicServiceStop, srv, &StopHandler{s})
s.Init(
Micro(svc),
)
return nil
}
}
}