altria.dot

digraph {
  graph [ ranksep=2.0; ]

  job_worker -> queue [label="push event"];
  job_worker -> queue [label="fetch job"];
  job_worker -> queue [label="push log"];

  api_server -> queue [label="push job"; weight=10];
  api_server -> db [label="query job"];

  scheduler -> api_server [label="trigger job"];

  client -> api_server [label="manage job"; weight=10];
  client -> stream_server [label="fetch log"];

  stream_server -> queue [label="fetch log"];

  event_worker -> queue [label="fetch event"];
  event_worker -> api_server [label="post status"];
  event_worker -> external_services [label="post status"];

  browser -> client;

  { rank = same; api_server; db }
}