以HTTP为主要目标构建Locust。但是,通过编写触发request_success
和request_failure
事件的自定义客户端,可以很容易的将其扩展,用来对任何基于request/response
的系统进行负载测试。
以下是Locust类XmlRpcLocust
的示例,该类提供XML-RPC客户端XmlRpcClient并跟踪所有发出的请求:
import time
import xmlrpclib
from locust import Locust, TaskSet, events, task, between
class XmlRpcClient(xmlrpclib.ServerProxy):
"""
Simple, sample XML RPC client implementation that wraps xmlrpclib.ServerProxy and
fires locust events on request_success and request_failure, so that all requests
gets tracked in locust's statistics.
"""
def __getattr__(self, name):
func = xmlrpclib.ServerProxy.__getattr__(self, name)
def wrapper(*args, **kwargs):
start_time = time.time()
try:
result = func(*args, **kwargs)
except xmlrpclib.Fault as e:
total_time = int((time.time() - start_time) * 1000)
events.request_failure.fire(request_type="xmlrpc", name=name, response_time=total_time, exception=e)
else:
total_time = int((time.time() - start_time) * 1000)
events.request_success.fire(request_type="xmlrpc", name=name, response_time=total_time, response_length=0)
# In this example, I've hardcoded response_length=0. If we would want the response length to be
# reported correctly in the statistics, we would probably need to hook in at a lower level
return wrapper
class XmlRpcLocust(Locust):
"""
This is the abstract Locust class which should be subclassed. It provides an XML-RPC client
that can be used to make XML-RPC requests that will be tracked in Locust's statistics.
"""
def __init__(self, *args, **kwargs):
super(XmlRpcLocust, self).__init__(*args, **kwargs)
self.client = XmlRpcClient(self.host)
class ApiUser(XmlRpcLocust):
host = "http://127.0.0.1:8877/"
wait_time = between(0.1, 1)
class task_set(TaskSet):
@task(10)
def get_time(self):
self.client.get_time()
@task(5)
def get_random_number(self):
self.client.get_random_number(0, 100)
如果你以前编写过 Locust的测试,你应该知道一个名为 ApiUser 的类,它是一个普通的 Locust 类,它的 task_set属性是一个 TaskSet 类的子类,而这个子类带有多个 task。
然而,ApiUser 继承自 XmlRpcLocust,您可以在 ApiUser 的正上方看到它。XmlRpcLocust 类在 client 属性下提供 XmlRpcClient 的实例。XmlRpcClient 是标准库的 xmlrclib. serverproxy
的装饰器。它基本上只是代理函数调用,但是添加了触发用于将所有调用报告给 Locust 统计数据的 locust.events.request_success
和 locust.events.request_failure
的重要功能。
下面是 XML-RPC 服务器的实现,它可以作为上述代码的服务器:
import random
import time
from SimpleXMLRPCServer import SimpleXMLRPCServer
def get_time():
time.sleep(random.random())
return time.time()
def get_random_number(low, high):
time.sleep(random.random())
return random.randint(low, high)
server = SimpleXMLRPCServer(("localhost", 8877))
print("Listening on port 8877...")
server.register_function(get_time, "get_time")
server.register_function(get_random_number, "get_random_number")