lib/redis_failover/errors.rb in redis_failover-0.8.0 vs lib/redis_failover/errors.rb in redis_failover-0.8.1

@@ -1,41 +1,45 @@
 module RedisFailover
+  # Base class for all RedisFailover errors.
   class Error < StandardError
-    attr_reader :original
-    def initialize(msg = nil, original = $!)
-      super(msg)
-      @original = original
-    end
   end
 
+  # Raised when a node is specified incorrectly.
   class InvalidNodeError < Error
   end
 
+  # Raised when a node changes to an invalid/unknown state.
   class InvalidNodeStateError < Error
     def initialize(node, state)
       super("Invalid state change `#{state}` for node #{node}")
     end
   end
 
+  # Raised when a node is unavailable (i.e., unreachable via network).
   class NodeUnavailableError < Error
     def initialize(node)
       super("Node: #{node}")
     end
   end
 
+  # Raised when no master is currently available.
   class NoMasterError < Error
   end
 
+  # Raised when no slave is currently available.
   class NoSlaveError < Error
   end
 
+  # Raised when a redis server is no longer using the same role
+  # as previously assumed.
   class InvalidNodeRoleError < Error
     def initialize(node, assumed, actual)
       super("Invalid role detected for node #{node}, client thought " +
         "it was a #{assumed}, but it's now a #{actual}")
     end
   end
 
+  # Raised when an unsupported redis operation is performed.
   class UnsupportedOperationError < Error
     def initialize(operation)
       super("Operation `#{operation}` is currently unsupported")
     end
   end
\ No newline at end of file