org.opennms.netmgt.poller.monitors
Class DNSResolutionMonitor

java.lang.Object
  org.opennms.netmgt.poller.monitors.AbstractServiceMonitor
      org.opennms.netmgt.poller.monitors.DNSResolutionMonitor

All Implemented Interfaces:

ServiceMonitor

@Distributable
public class DNSResolutionMonitor
extends AbstractServiceMonitor

DNSResolutionMonitor

Author:

brozow

Field Summary

static String	RESOLUTION_TYPE_DEFAULT
static String	RESOLUTION_TYPE_PARM
static String	RT_BOTH
static String	RT_EITHER
static String	RT_V4
static String	RT_V6

Constructor Summary

DNSResolutionMonitor()

Method Summary

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.monitors.AbstractServiceMonitor

initialize, initialize, log, logDown, logDown, logUp, release, release

Methods inherited from class java.lang.Object

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

Field Detail

RESOLUTION_TYPE_PARM

public static final String RESOLUTION_TYPE_PARM

See Also:

Constant Field Values

RT_V4

public static final String RT_V4

See Also:

Constant Field Values

RT_V6

public static final String RT_V6

See Also:

Constant Field Values

RT_BOTH

public static final String RT_BOTH

See Also:

Constant Field Values

RT_EITHER

public static final String RT_EITHER

See Also:

Constant Field Values

RESOLUTION_TYPE_DEFAULT

public static final String RESOLUTION_TYPE_DEFAULT

See Also:

Constant Field Values

Constructor Detail

DNSResolutionMonitor

public DNSResolutionMonitor()

Method Detail

poll

public PollStatus poll(MonitoredService svc,
                       Map<String,Object> parameters)

Description copied from class: AbstractServiceMonitor

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 interface 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.

Specified by:

poll in interface ServiceMonitor

Specified by:

poll in class AbstractServiceMonitor

Parameters:

svc - TODO

parameters - The package parameters (timeout, retry, etc...) to be used for this poll.

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