Apache Karaf Decanter provides a monitoring and logging framework built into Apache Karaf.

Events

Decanter uses the EventAdmin service to send and receive events. Events contain arbitrary properties of simple types or Map<String, ?> . If a map is stored into a property then the values of this map must be simple types (String, Integer, ...).

Collectors

Collectors are responsible for acquiring data, transforming them into a decanter event and send it to a topic.

Collectors can either be event based or polling.

Appenders

Appenders listen to topics and send the events to external systems

Possible extensions

Processors

Listen to events and produce new events

SLA Processors

Listens to events, is configured with SLA rules and creates alert events if rules are violated.

For example rule:

HeapMemoryUsage.max-HeapMemoryUsage.used < 200M -> decanter/alert/memory/heap

Exact syntax for configuration and rules tbd