org.opennms.netmgt.eventd

Class EventExpander

java.lang.Object

org.opennms.netmgt.eventd.EventExpander

All Implemented Interfaces:

EventExpander, EventProcessor, org.springframework.beans.factory.InitializingBean

public final class EventExpander
extends Object
implements EventExpander, EventProcessor, org.springframework.beans.factory.InitializingBean

This class is responsible for looking up the matching eventconf entry for an event and loading info from the eventconf match to the event. This class is also responsible for the event parm expansion

Notes on event parm expansion:

The list of elements that can have a %element% or %parms[*]% in their value are : descr, logmsg, operinstr, autoaction, operaction(/menu), tticket

The list of elements that can occur as a %element% are : uei, source, nodeid, time, host, interface, snmphost, service, snmp, id, idtext, version, specific, generic, community, severity, operinstr, mouseovertext, parm[values-all], parm[names-all], parm[all], parm[ ], parm[##], parm[# ]

  Expansions are made so that
  - %element% is replaced by the value of the element
    -i.e a 'xxx %uei%'  would expand to 'xxx <eventuei>'
  - %parm[values-all]% is replaced by a space-separated list of all parm values
    -i.e a 'xxx %parm[values-all]%'  would expand to 'xxx parmVal1 parmVal2 ..'
  - %parm[names-all]% is replaced by a space-separated list of all parm names
    -i.e a 'xxx %parm[names-all]%'  would expand to 'xxx parmName1 parmName2 ..'
  - %parm[all]% is replaced by a space-separated list of all parmName="parmValue"
     -i.e a 'xxx %parm[all]%'  would expand to 'xxx parmName1="parmVal1" parmName2="parmVal2" ..'
  - %parm[<name>]% is replaced by the value of the parameter named 'name', if present
  - %parm[#<num>]% is replaced by the value of the parameter number 'num', if present
  - %parm[##]% is replaced by the number of parameters

 

Author:

Brian Weaver , Sowmya Nataraj , OpenNMS

Constructor Summary

Constructors

Constructor and Description
EventExpander() The default trap UEI - if the trap lookup into the 'event.conf' fails, the trap event is loaded with information from this default UEI

Method Summary

Methods

Modifier and Type	Method and Description
void	afterPropertiesSet() afterPropertiesSet
void	expandEvent(Event e) This method is invoked to check and configure a received event.
EventConfDao	getEventConfDao() getEventConfDao
static Event	lookup(EventConfDao dao, Event event) This method is used to lookup the event configuration object based upon information in the passed information.
void	process(Header eventHeader, Event event) process
void	setEventConfDao(EventConfDao eventConfDao) setEventConfDao

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EventExpander

public EventExpander()

The default trap UEI - if the trap lookup into the 'event.conf' fails, the trap event is loaded with information from this default UEI

Method Detail

afterPropertiesSet

public void afterPropertiesSet()

afterPropertiesSet

Specified by:

afterPropertiesSet in interface org.springframework.beans.factory.InitializingBean

lookup

public static Event lookup(EventConfDao dao,
           Event event)

This method is used to lookup the event configuration object based upon information in the passed information. The EventConfDao instance is consulted to find a matching configured event. The lookup algorithm favors SNMP information if available, and then defaults to the event's Universal Event Identifier.

Parameters:

event - The event to find a configuration for.

Returns:

The matching configuration event, if any.

Throws:

NullPointerException - Thrown if the event parameter that was passed is null.

expandEvent

public void expandEvent(Event e)

This method is invoked to check and configure a received event. The event configuration manager is consulted to find the appropriate configuration that is used to expand the event. In addition, the security parameters from the configuration manager is consulted to ensure that secure files are cleared out if necessary.

Any secure fields that exists in the incoming event are cleared during expansion.

Specified by:

expandEvent in interface EventExpander

Parameters:

e - The event to expand if necessary.

process

public void process(Header eventHeader,
           Event event)

process

Specified by:

process in interface EventProcessor

Parameters:

eventHeader - a Header object.

event - a Event object.

getEventConfDao

public EventConfDao getEventConfDao()

getEventConfDao

Returns:

a EventConfDao object.

setEventConfDao

public void setEventConfDao(EventConfDao eventConfDao)

setEventConfDao

Specified by:

setEventConfDao in interface EventExpander

Parameters:

eventConfDao - a EventConfDao object.