Tips – How to write ruby retry
Posted by AllenWei | Posted in RubyOnRails, Tips | Posted on 15-02-2010-05-2008
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retry_times = 3
begin
# Exception here
rescue Exception => e
retry if (retry_times -= 1 ) > 0
end
begin
# Exception here
rescue Exception => e
retry if (retry_times -= 1 ) > 0
end
Retryable method I wrote:
# If you want to get a proxy but afraid of proxy failture, you can use this method.
# If retry times more than retry times in option parameter, will raise a RetryError.
# * :retry_times - Retry times , Defaults 10
# * :on - The Exception on which a retry will be performed. Defaults Exception
# Notice: This method will call block many times, so don't put can't retryable code in it.
# Example
# =======
# begin
# retryable_proxy(:retry_times => 10,:on => Timeout::Error) do |ip,port|
# # your code here
# end
# rescue RetryError
# # handle error
# end
#
def retryable_proxy(options = {},&block)
opts = {:retry_times => 10,:on => Exception}.merge(options)
retry_times, try_exception = opts[:retry_times], opts[:on]
begin
proxy = Lookup::Models::ProxyList.random
return block.call(proxy.ip,proxy.port)
rescue try_exception => e
retry if (retry_times -= 1) > 0
end
raise RetryError
end
# If retry times more than retry times in option parameter, will raise a RetryError.
# * :retry_times - Retry times , Defaults 10
# * :on - The Exception on which a retry will be performed. Defaults Exception
# Notice: This method will call block many times, so don't put can't retryable code in it.
# Example
# =======
# begin
# retryable_proxy(:retry_times => 10,:on => Timeout::Error) do |ip,port|
# # your code here
# end
# rescue RetryError
# # handle error
# end
#
def retryable_proxy(options = {},&block)
opts = {:retry_times => 10,:on => Exception}.merge(options)
retry_times, try_exception = opts[:retry_times], opts[:on]
begin
proxy = Lookup::Models::ProxyList.random
return block.call(proxy.ip,proxy.port)
rescue try_exception => e
retry if (retry_times -= 1) > 0
end
raise RetryError
end
