Serverproxy manager (#61)

* Create serverproxy_manager.py

* Replace use of direct RenderServerProxy with ServerProxyManager method

src/api/api_server.py

@@ -18,8 +18,8 @@ import psutil
 import yaml
 from flask import Flask, request, render_template, send_file, after_this_request, Response, redirect, url_for, abort
 
-from src.api.server_proxy import RenderServerProxy
 from src.api.add_job_helpers import handle_uploaded_project_files, process_zipped_project, create_render_jobs
+from src.api.serverproxy_manager import ServerProxyManager
 from src.distributed_job_manager import DistributedJobManager
 from src.engines.core.base_worker import string_to_status, RenderStatus
 from src.engines.engine_manager import EngineManager
@@ -211,7 +211,7 @@ def make_job_ready(job_id):
                 for child_key in found_job.children.keys():
                     child_id = child_key.split('@')[0]
                     hostname = child_key.split('@')[-1]
-                    RenderServerProxy(hostname).request_data(f'job/{child_id}/make_ready')
+                    ServerProxyManager.get_proxy_for_hostname(hostname).request_data(f'job/{child_id}/make_ready')
             found_job.status = RenderStatus.NOT_STARTED
             RenderQueue.save_state()
             return found_job.json(), 200

src/api/serverproxy_manager.py

@@ -0,0 +1,16 @@
+from src.api.server_proxy import RenderServerProxy
+
+
+class ServerProxyManager:
+
+    server_proxys = {}
+
+    @classmethod
+    def get_proxy_for_hostname(cls, hostname):
+        found_proxy = cls.server_proxys.get(hostname)
+        if not found_proxy:
+            new_proxy = RenderServerProxy(hostname)
+            new_proxy.start_background_update()
+            cls.server_proxys[hostname] = new_proxy
+            found_proxy = new_proxy
+        return found_proxy