Refactor: DistributedJobManager with pub/sub status change notifications (#25)

* Add pubsub to render_queue and base_worker

* Refactor: Convert ZeroconfServer to Singleton with Class Methods

* New API for subjob servers to notify parent job servers of status changes

* Refactor: Move all subjob related methods to distributed_job_manager.py

* Rewrite for wait_for_subjobs

* Fix: DistributedJobManager.find_available_servers() takes 1 positional argument but 3 were given

* DistributedJobManager should now notify / be notified abotu background job changes

* Fix the make_ready api. Change children keyname to be id@hostname so it can be unique

* Fixes

* Image sequence to movie needs to find the actual start frame

* Fix: subjob_status_change did not return a valid response

* Fix client renderer selection

* Small fix for subjob status checking

* Fix issue with divide_frames_equally

* Fix issue where downloads were not occurring

* Fix issue where old status was being reported

* Add docstrings and code cleanup

lib/utilities/server_helper.py

@@ -49,75 +49,3 @@ def generate_thumbnail_for_job(job, thumb_video_path, thumb_image_path, max_widt
         if video_files and not os.path.exists(thumb_video_path):
             x = threading.Thread(target=generate_thumb_thread, args=(video_files[0],))
             x.start()
-
-
-def divide_frames_evenly(start_frame, end_frame, num_servers):
-    frame_range = end_frame - start_frame + 1
-    frames_per_server = frame_range // num_servers
-    leftover_frames = frame_range % num_servers
-
-    ranges = []
-    current_start = start_frame
-    for i in range(num_servers):
-        current_end = current_start + frames_per_server - 1
-        if leftover_frames > 0:
-            current_end += 1
-            leftover_frames -= 1
-        if current_start <= current_end:
-            ranges.append((current_start, current_end))
-        current_start = current_end + 1
-
-    return ranges
-
-
-def divide_frames_by_cpu_count(frame_start, frame_end, servers):
-    total_frames = frame_end - frame_start + 1
-    total_performance = sum(server['cpu_count'] for server in servers)
-
-    frame_ranges = {}
-    current_frame = frame_start
-    allocated_frames = 0
-
-    for i, server in enumerate(servers):
-        if i == len(servers) - 1:  # if it's the last server
-            # Give all remaining frames to the last server
-            num_frames = total_frames - allocated_frames
-        else:
-            num_frames = round((server['cpu_count'] / total_performance) * total_frames)
-            allocated_frames += num_frames
-
-        frame_end_for_server = current_frame + num_frames - 1
-
-        if current_frame <= frame_end_for_server:
-            frame_ranges[server['hostname']] = (current_frame, frame_end_for_server)
-        current_frame = frame_end_for_server + 1
-
-    return frame_ranges
-
-
-def find_available_servers(server_list, renderer, start_frame, end_frame):
-    local_hostname = socket.gethostname()
-    subjob_servers = [{'hostname': local_hostname, 'cpu_count': psutil.cpu_count(logical=False)}]
-    for hostname in server_list:
-        if hostname != local_hostname:
-            response = RenderServerProxy(hostname).get_status()
-            if response and response.get('renderers', {}).get(renderer, {}).get('is_ready', False):
-                subjob_servers.append({'hostname': hostname, 'cpu_count': int(response['cpu_count'])})
-
-    if len(subjob_servers) == 1:
-        logger.debug("No available servers to split job with. Skipping subjob creation.")
-        return subjob_servers
-
-    # Calculate respective frames for each server
-    breakdown = divide_frames_by_cpu_count(start_frame, end_frame, subjob_servers)
-    subjob_servers = [server for server in subjob_servers if breakdown.get(server['hostname']) is not None]
-    for server in subjob_servers:
-        server['frame_range'] = breakdown[server['hostname']]
-        server['total_frames'] = breakdown[server['hostname']][-1] - breakdown[server['hostname']][0] + 1
-
-    return subjob_servers
-
-
-if __name__ == "__main__":
-    found_servers = ['kamino.local', 'deathstar.local']
-    print(find_available_servers(found_servers, 'blender', 1, 5))