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Logging

Broadcast Log Message

A-Stack allows users to provide facet id on which all the log messages can be broadcast.

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• sff.log.broadcast.<log level name> which defines one or more facet IDs used for log broadcasting. That is:
  •  <sff.log.broadcast.error>[:MyErrorsFacet:]</sff.log.broadcast.error> - This one will broadcast log error messages to [randomized] [:MyErrorsFacet:] fid 
  • <sff.log.broadcast.all>wstest</sff.log.broadcast.all> - This one will log messages to wstest fid.
    You can specify more than one fid as comma-separated list.
  • Known Log levels are: 
  1. 1. text
     2. trace
     3. debug
     4. info
     5. warn
     6. error
     7. fatal
     8. all

• sff.log.broadcast.protocol. Default value is “ws,wss”. This is the list of protocols which will be used to select broadcast pipelines. That is, it will *not* broadcast on HTTP connections, for example. When broadcast is enabled, startup will log the list of protocols so you know it was enabled. Obviously, it will *not* print the list of facet IDs used for broadcast.

• sff.log.broadcast.message. This is log message definition. It may come in different forms:

• <sff.log.broadcast.message>json<sff.log.broadcast.message> This simplest form allows you to define log message type (e.g. xml or json). Default is xml.

• Default message in JSON format will look like this:

  Code Block
  language text title Default Message linenumbers true
  { "Log": { "Level":"WARN", "Source":"SffSequenceFacet", "Timestamp":1479334740055, "Message":"startSchedularForMonitorStatus:MonitorStatus 1:0 @ Wed Nov 16 14:19:00 PST 2016: Scheduled: skip past (-55 ms) event for Wed Nov 16 14:19:00 PST 2016 [0../30sec]" } }

  In XML Format:

  Code Block
  language xml title Default Message linenumbers true
  <Log> <Level>WARN</Level> <Source>SffSequenceFacet</Source> <Timestamp>1479334740055<Timestamp> <Message>startSchedularForMonitorStatus:MonitorStatus 1:0 @ Wed Nov 16 14:19:00 PST 2016: Scheduled: skip past (-55 ms) event for Wed Nov 16 14:19:00 PST 2016 [0../30sec]</Message> </Log>

  
  Log messages are automatically added to the logger window on TQLConsole

Application Monitoring Using Broadcast Facet

Users can build monitoring application or application that require to know if Runtime has started etc using Broadcast facet.

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