Read data using inotify

Some modules need read data from disk. Wishbone comes with the wishbone.module.input.inotify which can be setup to listen for filesystem changes required to reload your data from disk.

The wishbone.module.queueselect.QueueSelect is a module which can read its conditions from disk. Obviously when these rules change they have to be reloaded. Instead of having to build the file monitoring/reload functionality its easier to foresee a queue which can process the events indicating files have changed.

The following yaml bootstrap file demonstrates how wishbone.module.input.inotify can be used to feed a module changes to files so it can respond to that accordingly:

Note

Obviously the module receiving the inotify events needs to have specific support for that.

modules:
  input:
    module: wishbone.module.input.generator
    arguments:
        payload: ok

  rule_monitor:
    module: wishbone.module.input.inotify
    arguments:
      paths:
        "/var/tmp/rules": [
            "IN_CREATE",
            "IN_CLOSE_WRITE",
            "IN_DELETE"
        ]
      glob_pattern: "*.yaml"

  match:
    module: wishbone.module.flow.queueselect
    arguments:
      templates:
        - name: test
          queue: >
            {{ 'ok' if data == 'ok' }}

  output:
    module: wishbone.module.output.stdout

routingtable:
  - input.outbox        -> match.inbox
  - match.ok            -> output.inbox

  - rule_monitor.outbox -> match.files

The bootstrap file translates into following diagram: