Monitoring components in a service framework
A solution is proposed for monitoring usage of bundles in the OSGi environment. For this purpose, an event notification interface of the OSGi environment is exploited. Particularly, each event relating to a change of state of a bundle (such as its addition, removal, starting and stopping) is detected by an auxiliary bundle—which previously subscribed to the event notification interface. The auxiliary bundle can then forward the detected events to a licensing agent, which identifies the bundle by means of a software catalogue. In this way, the desired result is achieved without requiring any instrumentation of the bundles to be monitored.
1. A method for monitoring a component in a service framework within a computer hardware system, comprising:
receiving, by an auxiliary component, a notification of an insertion or deletion of a bundle to a registry of the service framework that includes a list of all available services and corresponding functions capable of being invoked; and
forwarding, by the auxiliary component and to a licensing agent, an indication corresponding to the notification, wherein
the auxiliary component converts the notification into a format supported by the licensing agent.
2. The method of claim 1 , wherein
the auxiliary component subscribes to an event handler configured to receive events from the component,
the subscription specifies an event from the component relating to a change of state of the component, and
the event handler sends the notification to the auxiliary component based upon the event matching the subscription.
3. The method of claim 2 , wherein
the indication includes a descriptor of the component and a topic that identifies a type of the event.
4. The method of claim 1 , wherein
the auxiliary component monitors the component without instrumenting the component.
5. The method of claim 1 , wherein
the licensing agent is configured to receive the indication from both the auxiliary component and the component.
6. The method of claim 1 , wherein
a service is implemented by the component.
7. A computer hardware system configured to monitor a component in a service framework within the computer hardware system, comprising:
a hardware processor configured to initiate the following operations:
receiving, by an auxiliary component, a notification of an insertion or deletion of a bundle to a registry of the service framework that includes a list of all available services and corresponding functions capable of being invoked; and
forwarding, by the auxiliary component and to a licensing agent, an indication corresponding to the notification, wherein
the auxiliary component converts the notification into a format supported by the licensing agent.
8. The system of claim 7 , wherein
the auxiliary component subscribes to an event handler configured to receive events from the component,
the subscription specifies an event from the component relating to a change of state of the component, and
the event handler sends the notification to the auxiliary component based upon the event matching the subscription.
9. The system of claim 8 , wherein
the indication includes a descriptor of the component and a topic that identifies a type of the event.
10. The system of claim 7 , wherein
the auxiliary component monitors the component without instrumenting the component.
11. The system of claim 7 , wherein
the licensing agent is configured to receive the indication from both the auxiliary component and the component.
12. The system of claim 7 , wherein
a service is implemented by the component.
13. A computer program product, comprising:
a computer-usable hardware storage device having stored therein program code for monitoring a component in a service framework within a computer hardware system,
the program code, which when executed by the computer hardware system, causes the computer hardware system to perform:
receiving, by an auxiliary component, a notification of an insertion or deletion of a bundle to a registry of the service framework that includes a list of all available services and corresponding functions capable of being invoked; and
forwarding, by the auxiliary component and to a licensing agent, an indication corresponding to the notification, wherein
the auxiliary component converts the notification into a format supported by the licensing agent.
14. The computer program product of claim 13 , wherein
the auxiliary component subscribes to an event handler configured to receive events from the component,
the subscription specifies an event from the component relating to a change of state of the component, and
the event handler sends the notification to the auxiliary component based upon the event matching the subscription.
15. The computer program product of claim 14 , wherein
the indication includes a descriptor of the component and a topic that identifies a type of the event.
16. The computer program product of claim 13 , wherein
the auxiliary component monitors the component without instrumenting the component.
17. The computer program product of claim 13 , wherein
the licensing agent is configured to receive the indication from both the auxiliary component and the component.