forked from openebs-archive/maya
/
server.go
76 lines (60 loc) · 1.87 KB
/
server.go
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// Copyright © 2017-2019 The OpenEBS Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package server
import (
"io"
"log"
"sync"
"github.com/openebs/maya/cmd/maya-apiserver/app/config"
)
// MayaApiServer is a long running stateless daemon that runs
// at openebs maya master(s)
type MayaApiServer struct {
config *config.MayaConfig
logger *log.Logger
logOutput io.Writer
shutdown bool
shutdownCh chan struct{}
shutdownLock sync.Mutex
}
// NewMayaApiServer is used to create a new maya api server
// with the given configuration
func NewMayaApiServer(config *config.MayaConfig, logOutput io.Writer) (*MayaApiServer, error) {
ms := &MayaApiServer{
config: config,
logger: log.New(logOutput, "", log.LstdFlags|log.Lmicroseconds),
logOutput: logOutput,
shutdownCh: make(chan struct{}),
}
return ms, nil
}
// Shutdown is used to terminate MayaServer.
func (ms *MayaApiServer) Shutdown() error {
ms.shutdownLock.Lock()
defer ms.shutdownLock.Unlock()
ms.logger.Println("[INFO] maya api server: requesting shutdown")
if ms.shutdown {
return nil
}
ms.logger.Println("[INFO] maya api server: shutdown complete")
ms.shutdown = true
close(ms.shutdownCh)
return nil
}
// Leave is used gracefully exit.
func (ms *MayaApiServer) Leave() error {
ms.logger.Println("[INFO] maya api server: exiting gracefully")
// Nothing as of now
return nil
}