org.opennms.protocols.dhcp.monitor

Class DhcpMonitor

java.lang.Object

org.opennms.netmgt.poller.support.AbstractServiceMonitor

org.opennms.protocols.dhcp.monitor.DhcpMonitor

All Implemented Interfaces:

ServiceMonitor

@Distributable(value=DAEMON)
public final class DhcpMonitor
extends AbstractServiceMonitor

This class is designed to be used by the service poller framework to test the availability of the DHCP service on remote interfaces as defined by RFC 2131. This class relies on the DHCP API provided by JDHCP v1.1.1 (please refer to http://www.dhcp.org/javadhcp ). The class implements the ServiceMonitor interface that allows it to be used along with other plug-ins by the service poller framework.

Author:

Tarus Balog , OpenNMS

Constructor Summary

Constructors

Constructor and Description
DhcpMonitor()

Method Summary

Modifier and Type	Method and Description
PollStatus	poll(MonitoredService svc, Map<String,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

Constructor Detail

DhcpMonitor

public DhcpMonitor()

Method Detail

poll

public PollStatus poll(MonitoredService svc,
                       Map<String,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).

Poll the specified address for DHCP service availability.

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