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#!/usr/bin/env python

import time
import random
import string
import sys


global total_time

def run_test(func, name):
	sys.stdout.write(name + ': ')
	sys.stdout.flush()
	start_time = time.time()
	try:
		func()
	except:
		print "failed or not supported"
		global options
		if options.verbose:
			import traceback; traceback.print_exc()
	else:
		end_time = time.time()
		global total_time
		total_time += end_time - start_time
		print "%f seconds" % (end_time - start_time)


class BigObject(object):
	def __init__(self, letter='1', size=10000):
		self.object = letter * size

	def __eq__(self, other):
		return self.object == other.object


class Benchmark(object):
	def __init__(self, module, options):
		self.module = module
		self.options = options
		self.init_server()
	   	self.test_set()
	   	self.test_set_get()
	   	self.test_random_get()
		self.test_set_same()
		self.test_set_big_object()
		self.test_set_get_big_object()
		self.test_set_big_string()
		self.test_set_get_big_string()
		self.test_get()
		self.test_get_big_object()
		self.test_get_multi()
		self.test_p_app_get()
		#self.test_get_list()

	def init_server(self):
		#self.mc = self.module.Client([self.options.server_address])
		self.mc = self.module.Client(["127.0.0.1:11211"])
		self.mc.set('bench_key', "E" * 50)

		num_tests = self.options.num_tests
		self.keys = ['key%d' % i for i in xrange(num_tests)]
		self.values = ['value%d' % i for i in xrange(num_tests)]
		import random
		self.random_keys = ['key%d' % random.randint(0, num_tests) for i in xrange(num_tests * 3)]

	def test_set(self):
		set_ = self.mc.set
		pairs = zip(self.keys, self.values)

		def test():
			for key, value in pairs:
				set_(key, value)
		def test_loop():
			for i in range(10):
				for key, value in pairs:
					set_(key, value)
		run_test(test, 'test_set')

		for key, value in pairs:
			self.mc.delete(key)

	def test_set_get(self):
		set_ = self.mc.set
		get_ = self.mc.get
		pairs = zip(self.keys, self.values)

		def test():
			for key, value in pairs:
				set_(key, value)
				result = get_(key)
				assert result == value
		run_test(test, 'test_set_get')

		#for key, value in pairs:
		#	self.mc.delete(key)

	def test_random_get(self):
		get_ = self.mc.get
		set_ = self.mc.set

		value = "chenyin"

		def test():
			index = 0
			for key in self.random_keys:
				result = get_(key)
				index += 1
				if(index % 5 == 0):
					set_(key, value)
		run_test(test, 'test_random_get')

	def test_set_same(self):
		set_ = self.mc.set

		def test():
			for i in xrange(self.options.num_tests):
				set_('key', 'value')
		def test_loop():
			for i in range(10):
				for i in xrange(self.options.num_tests):
					set_('key', 'value')
		run_test(test, 'test_set_same')

		self.mc.delete('key')

	def test_set_big_object(self):
		set_ = self.mc.set
		# libmemcached is slow to store large object, so limit the
		# number of objects here to make tests not stall.
		pairs = [('key%d' % i, BigObject()) for i in xrange(100)]

		def test():
			for key, value in pairs:
				set_(key, value)

		run_test(test, 'test_set_big_object (100 objects)')

		for key, value in pairs:
			self.mc.delete(key)

	def test_set_get_big_object(self):
		set_ = self.mc.set
		get_ = self.mc.get
		# libmemcached is slow to store large object, so limit the
		# number of objects here to make tests not stall.
		pairs = [('key%d' % i, BigObject()) for i in xrange(100)]

		def test():
			for key, value in pairs:
				set_(key, value)
				result = get_(key)
				assert result == value

		run_test(test, 'test_set_get_big_object (100 objects)')

		#for key, value in pairs:
		#	self.mc.delete(key)

	def test_set_get_big_string(self):
		set_ = self.mc.set
		get_ = self.mc.get

		# libmemcached is slow to store large object, so limit the
		# number of objects here to make tests not stall.
		pairs = [('key%d' % i, 'x' * 10000) for i in xrange(100)]

		def test():
			for key, value in pairs:
				set_(key, value)
				result = get_(key)
				assert result == value
		run_test(test, 'test_set_get_big_string (100 objects)')


	def test_set_big_string(self):
		set_ = self.mc.set

		# libmemcached is slow to store large object, so limit the
		# number of objects here to make tests not stall.
		pairs = [('key%d' % i, 'x' * 10000) for i in xrange(100)]

		def test():
			for key, value in pairs:
				set_(key, value)
		run_test(test, 'test_set_big_string (100 objects)')

		for key, value in pairs:
			self.mc.delete(key)


	def test_get(self):
		pairs = zip(self.keys, self.values)
		for key, value in pairs:
			self.mc.set(key, value)

		get = self.mc.get

		def test():
			for key, value in pairs:
				result = get(key)
				assert result == value
		run_test(test, 'test_get')

		for key, value in pairs:
			self.mc.delete(key)

	def test_get_big_object(self):
		pairs = [('bkey%d' % i, BigObject('x')) for i in xrange(100)]
		for key, value in pairs:
			self.mc.set(key, value)

		get = self.mc.get
		expected_values = [BigObject('x') for i in xrange(100)]

		def test():
			for i in xrange(100):
				result = get('bkey%d' % i)
				assert result == expected_values[i]
		run_test(test, 'test_get_big_object (100 objects)')

		for key, value in pairs:
			self.mc.delete(key)

	def test_p_app_get(self):
		keys = ['Users/getUserById/1/False', '1_db:users_map', '2_db:table_group', '2_db:shard_infoN3']
		def test():
			for key in keys:
				self.mc.get(key)

		run_test(test, 'test_p_app_get')

	def test_get_multi(self):
		pairs = zip(self.keys, self.values)
		for key, value in pairs:
			self.mc.set(key, value)

		keys = self.keys
		expected_result = dict(pairs)

		def test():
			result = self.mc.get_multi(keys)
			assert result == expected_result
		run_test(test, 'test_get_multi')

		for key, value in pairs:
			self.mc.delete(key)

	def test_get_list(self):
		pairs = zip(self.keys, self.values)
		for key, value in pairs:
			self.mc.set(key, value)

		keys = self.keys
		expected_result = self.values

		def test():
			result = self.mc.get_list(keys)
			assert result == expected_result
		run_test(test, 'test_get_list')

		for key in self.keys:
			self.mc.delete(key)


def main(module_name, module):
	from optparse import OptionParser
	parser = OptionParser()
	parser.add_option('-a', '--server-address', dest='server_address',
			default='127.0.0.1:11211',
			help="address:port of memcached [default: 127.0.0.1:11211]")
	parser.add_option('-n', '--num-tests', dest='num_tests', type='int',
			default=1000,
			help="repeat counts of each test [default: 1000]")
	parser.add_option('-v', '--verbose', dest='verbose',
			action='store_true', default=False,
			help="show traceback infomation if a test fails")
	global options
	options, args = parser.parse_args()

	global total_time
	total_time = 0

	print "Benchmarking %s..." % module_name
	Benchmark(module, options)

	print "Total_time is %f" % total_time
	print '---'


if __name__ == '__main__':
	import cmemcache
	import cmemcached
	import memcache
	import pylibmc

	modules = [
		('cmemcache', cmemcache),
		('cmemcached', cmemcached),
		('memcache', memcache),
		('pylibmc', pylibmc)
	]

	for name, module in modules:
		main(name, module)