update locust and add some documentation

resources/locust/Readme.md

@@ -0,0 +1,20 @@
+# Performance test for grobid-quantities
+
+> conda create --name locust python=3.9 pip 
+
+> pip install locust 
+
+> cd resources/locust 
+
+Start the master 
+> locust --config master.conf 
+
+Start the worker (in this example we need at least one worker)
+> locust --worker 
+
+Connect to the locust interface on http://localhost:8089
+
+You can run the locust without interface by 
+1. set headless = True in the master.conf 
+2. specify an output html file ``--output output.html`` when you start the master
+    > locust --config master.conf 

resources/locust/locustfile.py

@@ -2,31 +2,23 @@
 
 from locust import HttpUser, task, between
 
-import json
-
 
 class QuickstartUser(HttpUser):
     wait_time = between(5, 9)
 
-    test_data = []
+    text_documents = []
 
     @task
     def process_text(self):
-        n = random.randint(0, len(self.test_data) - 1)
-        paragraph = self.test_data[n]
+        n = random.randint(0, len(self.text_documents) - 1)
+        text_document = self.text_documents[n]
         headers = {"Accept": "application/json"}
-        files = {'text': str(paragraph)}
-        self.client.post(url="/quantities/service/processQuantityText", files=files,
-                         headers=headers, name="quantity_text")
+        files = {"text": text_document}
+        self.client.post("/service/processQuantityText", files=files, headers=headers, name="processQuantityText")
 
-    # @task(3)
-    # def view_item(self):
-    #     # item_id = random.randint(1, 10000)
-    #     # self.client.get(f"/item?id={item_id}", name="/item")
-    #     pass
-    #
     def on_start(self):
-        with open("testData.txt", 'r') as fp:
-            lines = fp.readlines()
+        if len(self.text_documents) == 0:
+            with open("testData.txt", 'r') as fp:
+                lines = fp.readlines()
 
-            self.test_data.extend(lines)
+            self.text_documents.extend(lines)

resources/locust/master.conf

@@ -0,0 +1,9 @@
+# master.conf in current directory
+locustfile = locustfile.py
+headless = false
+master = true
+expect-workers = 1
+host = http://localhost:8060
+users = 100
+spawn-rate = 10
+run-time = 10m