Package org.opennms.netmgt.poller.monitors

Class AvailabilityMonitor

java.lang.Object

org.opennms.netmgt.poller.support.AbstractServiceMonitor

org.opennms.netmgt.poller.monitors.AvailabilityMonitor

All Implemented Interfaces:

ServiceMonitor

public class AvailabilityMonitor
extends AbstractServiceMonitor

This class uses the Java 5 isReachable method to determine up/down and is currently considered "experimental". Please give it a try and let us know.

Version:

$Id: $

Author:

David Hustace

Field Summary

Fields

Modifier and Type	Field	Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
AvailabilityMonitor()

Method Summary

Modifier and Type	Method	Description
PollStatus	poll(MonitoredService svc, java.util.Map<java.lang.String,java.lang.Object> parameters)	This method is the heart of the plug-in monitor.

Methods inherited from class org.opennms.netmgt.poller.support.AbstractServiceMonitor

getEffectiveLocation, getKeyedBoolean, getKeyedInstance, getKeyedInteger, getKeyedLong, getKeyedObject, getKeyedString, getRuntimeAttributes, getServiceProperties

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

AvailabilityMonitor

public AvailabilityMonitor()

Method Detail

poll

public PollStatus poll(MonitoredService svc,
                       java.util.Map<java.lang.String,java.lang.Object> parameters)

This method is the heart of the plug-in monitor. Each time an interface requires a check to be performed as defined by the scheduler the poll method is invoked. The poll is passed the service to check.

By default when the status transition from up to down or vice versa the framework will generate an event. Additionally, if the polling interval changes due to an extended unavailability, the framework will generate an additional down event. The plug-in can suppress the generation of the default events by setting the suppress event bit in the returned integer.

NOTE: This method may be invoked on a Minion, in which case certain bean and facilities will not be available. If any state related information is required such as agent related configuration, it should retrieved by the ServiceMonitor.getRuntimeAttributes(MonitoredService, Map).

Parameters:

svc - Includes details about to the service being monitored.

parameters - Includes the service parameters defined in poller-configuration.xml and those returned by ServiceMonitor.getRuntimeAttributes(MonitoredService, Map).

Returns:

The availability of the interface and if a transition event should be suppressed.

See Also:

PollStatus.SERVICE_AVAILABLE, PollStatus.SERVICE_UNAVAILABLE, PollStatus.SERVICE_AVAILABLE, PollStatus.SERVICE_UNAVAILABLE