lager event handler for websocket clients. lager_websocket is a lager sink that sends messages received from lager to clients connected via websocket.
% websocket URL .../lager/websocket - websocket
% simple viewer .../lager/static/index.html
% Message format Messages are delivered as JSON objects.
| Field | Value |
|---|---|
| logid | log identifier - these increase sequentially |
| message | body of the message |
| date | date (YYYY-MM-DD format) |
| time | time (HH:MM:SS format) |
| severity | message severity (e.g., debug, info, warning, error) |
| metdata | JSON object with additional information about the message |
{
"logid":12,
"message":"Lager installed handler lager_backend_throttle into lager_event"
"date":"2015-08-11",
"time":"15:43:08.227",
"severity":"debug",
"metadata":{
"pid":"<0.144.0>",
"line":94,
"file":"src/lager_handler_watcher.erl",
"module:"lager_handler_watcher"
}
}
| Name | Value | Example | Description |
|---|---|---|---|
| clean_interval_sec | integer | 1 | number of seconds between archive purges |
| max_retention_minutes | integer | 60 | oldest log record allowed in archive |
| new_message_count | integer | 5 | number of past messages to send when a client subscribes |