exceptions.py 4.1 KB

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  1. """Kazoo Exceptions"""
  2. from collections import defaultdict
  3. class KazooException(Exception):
  4. """Base Kazoo exception that all other kazoo library exceptions
  5. inherit from"""
  6. class ZookeeperError(KazooException):
  7. """Base Zookeeper exception for errors originating from the
  8. Zookeeper server"""
  9. class CancelledError(KazooException):
  10. """Raised when a process is cancelled by another thread"""
  11. class ConfigurationError(KazooException):
  12. """Raised if the configuration arguments to an object are
  13. invalid"""
  14. class ZookeeperStoppedError(KazooException):
  15. """Raised when the kazoo client stopped (and thus not connected)"""
  16. class ConnectionDropped(KazooException):
  17. """Internal error for jumping out of loops"""
  18. class LockTimeout(KazooException):
  19. """Raised if failed to acquire a lock.
  20. .. versionadded:: 1.1
  21. """
  22. class WriterNotClosedException(KazooException):
  23. """Raised if the writer is unable to stop closing when requested.
  24. .. versionadded:: 1.2
  25. """
  26. class SaslException(KazooException):
  27. """Raised if SASL encountered an error.
  28. .. versionadded:: 2.1
  29. """
  30. def _invalid_error_code():
  31. raise RuntimeError('Invalid error code')
  32. EXCEPTIONS = defaultdict(_invalid_error_code)
  33. def _zookeeper_exception(code):
  34. def decorator(klass):
  35. def create(*args, **kwargs):
  36. return klass(args, kwargs)
  37. EXCEPTIONS[code] = create
  38. klass.code = code
  39. return klass
  40. return decorator
  41. @_zookeeper_exception(0)
  42. class RolledBackError(ZookeeperError):
  43. pass
  44. @_zookeeper_exception(-1)
  45. class SystemZookeeperError(ZookeeperError):
  46. pass
  47. @_zookeeper_exception(-2)
  48. class RuntimeInconsistency(ZookeeperError):
  49. pass
  50. @_zookeeper_exception(-3)
  51. class DataInconsistency(ZookeeperError):
  52. pass
  53. @_zookeeper_exception(-4)
  54. class ConnectionLoss(ZookeeperError):
  55. pass
  56. @_zookeeper_exception(-5)
  57. class MarshallingError(ZookeeperError):
  58. pass
  59. @_zookeeper_exception(-6)
  60. class UnimplementedError(ZookeeperError):
  61. pass
  62. @_zookeeper_exception(-7)
  63. class OperationTimeoutError(ZookeeperError):
  64. pass
  65. @_zookeeper_exception(-8)
  66. class BadArgumentsError(ZookeeperError):
  67. pass
  68. @_zookeeper_exception(-100)
  69. class APIError(ZookeeperError):
  70. pass
  71. @_zookeeper_exception(-101)
  72. class NoNodeError(ZookeeperError):
  73. pass
  74. @_zookeeper_exception(-102)
  75. class NoAuthError(ZookeeperError):
  76. pass
  77. @_zookeeper_exception(-103)
  78. class BadVersionError(ZookeeperError):
  79. pass
  80. @_zookeeper_exception(-108)
  81. class NoChildrenForEphemeralsError(ZookeeperError):
  82. pass
  83. @_zookeeper_exception(-110)
  84. class NodeExistsError(ZookeeperError):
  85. pass
  86. @_zookeeper_exception(-111)
  87. class NotEmptyError(ZookeeperError):
  88. pass
  89. @_zookeeper_exception(-112)
  90. class SessionExpiredError(ZookeeperError):
  91. pass
  92. @_zookeeper_exception(-113)
  93. class InvalidCallbackError(ZookeeperError):
  94. pass
  95. @_zookeeper_exception(-114)
  96. class InvalidACLError(ZookeeperError):
  97. pass
  98. @_zookeeper_exception(-115)
  99. class AuthFailedError(ZookeeperError):
  100. pass
  101. @_zookeeper_exception(-118)
  102. class SessionMovedError(ZookeeperError):
  103. pass
  104. @_zookeeper_exception(-119)
  105. class NotReadOnlyCallError(ZookeeperError):
  106. """An API call that is not read-only was used while connected to
  107. a read-only server"""
  108. class ConnectionClosedError(SessionExpiredError):
  109. """Connection is closed"""
  110. # BW Compat aliases for C lib style exceptions
  111. ConnectionLossException = ConnectionLoss
  112. MarshallingErrorException = MarshallingError
  113. SystemErrorException = SystemZookeeperError
  114. RuntimeInconsistencyException = RuntimeInconsistency
  115. DataInconsistencyException = DataInconsistency
  116. UnimplementedException = UnimplementedError
  117. OperationTimeoutException = OperationTimeoutError
  118. BadArgumentsException = BadArgumentsError
  119. ApiErrorException = APIError
  120. NoNodeException = NoNodeError
  121. NoAuthException = NoAuthError
  122. BadVersionException = BadVersionError
  123. NoChildrenForEphemeralsException = NoChildrenForEphemeralsError
  124. NodeExistsException = NodeExistsError
  125. InvalidACLException = InvalidACLError
  126. AuthFailedException = AuthFailedError
  127. NotEmptyException = NotEmptyError
  128. SessionExpiredException = SessionExpiredError
  129. InvalidCallbackException = InvalidCallbackError