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--- fw:locust [2014/08/08 08:28]
alfred [Basic things in Locust]
+++ fw:locust [2020/05/09 09:25] (actual)
@@ Línea 2: / Línea 2: @@
 Is a load testing tool in which you define user behaviour and the system launches a lot of non-real users accessing your web page.
+  * Docs: [[http://docs.locust.io/en/latest/]]
 ===== Basic things =====
 ==== Install ====
@@ Línea 12: / Línea 13: @@
 ''HttpLocust'' is a ''Locust'' class that allows HTTP requests.
+The ''Locust'' class represents a user then, the system, will create a lot of locust instances (one for each user simulated). It contains...
+  * ''task_set'' attribute, which will be set with a ''TaskSet'' instance that defines the user behaviour.
+  * ''min_wait'' and ''max_wait'' attributes, milliseconds that a simulated user will wait between executing each task. If they are not set, locust will wait a second to execute it again (both have 1000 as default).
+  * ''host'', you can specify it on the command line using the –host option. It tells the host to be loaded.
+  * ''weight'' tells the frequency of use, for example, ''WebUserLocust'' will be executed three times ''MobileUserLocust''.
+<code python>
+class WebUserLocust(Locust):
+    weight = 3
+    ....
+class MobileUserLocust(Locust):
+    weight = 1
+    ....
+</code>
+The ''TaskSet'' represents the user behaviour. It's a collection of tasks (actions). If we were loadtesting an auction website this tasks would be like “loading the start page”, “searching for some product” and “making a bid”.
+In a load test, each TaskSet will pick one of it’s tasks and call it. It will then wait a number of milliseconds, chosen at random between min_wait and max_wait attributes. Then it will again pick a new task which will be called, then wait again, and so on.
 === Examples ===
 This...
@@ Línea 38: / Línea 58: @@
 </code>
 Is the same than...
-<code>
+<code python>
 from locust import HttpLocust, TaskSet, task
@@ Línea 70: / Línea 90: @@
 <code>
 locust -f ../locust_files/my_locust_file.py
+</code>
+Running two locust in the same file (weight attribute will define the frequency of calling).
+<code>
+locust -f locust_file.py WebUserLocust MobileUserLocust
 </code>
@@ Línea 93: / Línea 117: @@
 ===== More things... =====
+==== The TaskSet class ====
+=== Declaring tasks with the task decorator ===
+<code python>
+from locust import Locust, TaskSet, task
+class MyTaskSet(TaskSet):
+    @task
+    def my_task(self):
+        print "Locust instance (%r) executing my_task" % (self.locust)
+class MyLocust(Locust):
+    task_set = MyTaskSet
+</code>
+Or defining weight (task2 will be executed twice than task):
+<code python>
+from locust import Locust, TaskSet, task
+class MyTaskSet(TaskSet):
+    min_wait = 5000
+    max_wait = 15000
+    @task(3)
+    def task1(self):
+        pass
+    @task(6)
+    def task2(self):
+        pass
+class MyLocust(Locust):
+    task_set = MyTaskSet
+</code>
+=== Set an dictionary to tasks attribute ===
+The next dictionary will assign two tasks, each one with their weight.
+<code python>
+class MyTaskSet(TaskSet):
+    tasks = {my_task: 3, another_task:1}
+</code>
+=== The on_start function ===
+A TaskSet class can declare an on_start function. That function is called when a simulated user starts executing tasks in that TaskSet.
+=== Nesting TaskSets ===
+We can define a ''TaskSet'' as a task. Then it will represent a group of sub-task which are executed in that way.
+It could be useful to represent a user that makes actions over the web (like enter in a web, then browse films and watch one, then navigate in the blog and comment and comment again, then navigate again, then browse films...).
+A nested class set could call the ''self.interrupt()'' function. It interrupts the action in that class set.
+=== Nested sub-tasks examples ===
+<code python>
+class ForumPage(TaskSet):
+    @task(20)
+    def read_thread(self):
+        pass
+    @task(1)
+    def new_thread(self):
+        pass
+    @task(5)
+    def stop(self):
+        self.interrupt()
+class UserBehaviour(TaskSet):
+    tasks = {ForumPage:10}
+    @task
+    def index(self):
+        pass
+</code>
+<code python>
+class MyTaskSet(TaskSet):
+    @task
+    class SubTaskSet(TaskSet):
+        @task
+        def my_task(self):
+            pass
+</code>
+==== Hacer nuestro propio cliente ====
+Haremos un cliente "específico" para la tarea de deseemos. Este heredará de la clase ''Locust'' y usará el código que deseemos. Luego, para definir las acciones del test de carga heredaremos de esa clase; esta contendrá el taskset. Ver [[http://docs.locust.io/en/latest/testing-other-systems.html|aquí]], donde tenemos un código ''XmlRpcClient'' y una clase ''Locust'' que lo usa, la ''XmlRpcLocust''.
+==== The HTTPClient ====
+  * [[http://docs.locust.io/en/latest/writing-a-locustfile.html#using-the-http-client]]

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