github.com/aigarnetwork/aigar@v0.0.0-20191115204914-d59a6eb70f8e/node/errors.go (about)

     1  //  Copyright 2018 The go-ethereum Authors
     2  //  Copyright 2019 The go-aigar Authors
     3  //  This file is part of the go-aigar library.
     4  //
     5  //  The go-aigar library is free software: you can redistribute it and/or modify
     6  //  it under the terms of the GNU Lesser General Public License as published by
     7  //  the Free Software Foundation, either version 3 of the License, or
     8  //  (at your option) any later version.
     9  //
    10  //  The go-aigar library is distributed in the hope that it will be useful,
    11  //  but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  //  GNU Lesser General Public License for more details.
    14  //
    15  //  You should have received a copy of the GNU Lesser General Public License
    16  //  along with the go-aigar library. If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package node
    19  
    20  import (
    21  	"errors"
    22  	"fmt"
    23  	"reflect"
    24  	"syscall"
    25  )
    26  
    27  var (
    28  	ErrDatadirUsed    = errors.New("datadir already used by another process")
    29  	ErrNodeStopped    = errors.New("node not started")
    30  	ErrNodeRunning    = errors.New("node already running")
    31  	ErrServiceUnknown = errors.New("unknown service")
    32  
    33  	datadirInUseErrnos = map[uint]bool{11: true, 32: true, 35: true}
    34  )
    35  
    36  func convertFileLockError(err error) error {
    37  	if errno, ok := err.(syscall.Errno); ok && datadirInUseErrnos[uint(errno)] {
    38  		return ErrDatadirUsed
    39  	}
    40  	return err
    41  }
    42  
    43  // DuplicateServiceError is returned during Node startup if a registered service
    44  // constructor returns a service of the same type that was already started.
    45  type DuplicateServiceError struct {
    46  	Kind reflect.Type
    47  }
    48  
    49  // Error generates a textual representation of the duplicate service error.
    50  func (e *DuplicateServiceError) Error() string {
    51  	return fmt.Sprintf("duplicate service: %v", e.Kind)
    52  }
    53  
    54  // StopError is returned if a Node fails to stop either any of its registered
    55  // services or itself.
    56  type StopError struct {
    57  	Server   error
    58  	Services map[reflect.Type]error
    59  }
    60  
    61  // Error generates a textual representation of the stop error.
    62  func (e *StopError) Error() string {
    63  	return fmt.Sprintf("server: %v, services: %v", e.Server, e.Services)
    64  }