github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/services/noop/service.go (about)

     1  /*
     2   * Copyright (C) 2018 The "MysteriumNetwork/node" Authors.
     3   *
     4   * This program is free software: you can redistribute it and/or modify
     5   * it under the terms of the GNU General Public License as published by
     6   * the Free Software Foundation, either version 3 of the License, or
     7   * (at your option) any later version.
     8   *
     9   * This program is distributed in the hope that it will be useful,
    10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12   * GNU General Public License for more details.
    13   *
    14   * You should have received a copy of the GNU General Public License
    15   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    16   */
    17  
    18  package noop
    19  
    20  import (
    21  	"encoding/json"
    22  	"net"
    23  	"sync"
    24  
    25  	"github.com/mysteriumnetwork/node/core/service"
    26  	"github.com/pkg/errors"
    27  	"github.com/rs/zerolog/log"
    28  )
    29  
    30  // ErrAlreadyStarted is the error we return when the start is called multiple times
    31  var ErrAlreadyStarted = errors.New("service already started")
    32  
    33  // NewManager creates new instance of Noop service
    34  func NewManager() *Manager {
    35  	return &Manager{}
    36  }
    37  
    38  // Manager represents entrypoint for Noop service
    39  type Manager struct {
    40  	process sync.WaitGroup
    41  }
    42  
    43  // ProvideConfig provides the session configuration
    44  func (manager *Manager) ProvideConfig(_ string, _ json.RawMessage, _ *net.UDPConn) (*service.ConfigParams, error) {
    45  	return &service.ConfigParams{}, nil
    46  }
    47  
    48  // Serve starts service - does block
    49  func (manager *Manager) Serve(instance *service.Instance) error {
    50  	manager.process.Add(1)
    51  	log.Info().Msg("Noop service started successfully")
    52  	manager.process.Wait()
    53  	return nil
    54  }
    55  
    56  // Stop stops service
    57  func (manager *Manager) Stop() error {
    58  	manager.process.Done()
    59  	log.Info().Msg("Noop service stopped")
    60  	return nil
    61  }