Package org.opennms.netmgt.poller.monitors

Class DNSResolutionMonitor

java.lang.Object

org.opennms.netmgt.poller.support.AbstractServiceMonitor

org.opennms.netmgt.poller.monitors.support.ParameterSubstitutingMonitor

org.opennms.netmgt.poller.monitors.DNSResolutionMonitor

All Implemented Interfaces:

ServiceMonitor

public class DNSResolutionMonitor
extends ParameterSubstitutingMonitor

DNSResolutionMonitor

Author:

brozow, fooker, schlazor

Field Summary

Fields

Modifier and Type	Field	Description
static org.slf4j.Logger	LOG
static String	PARM_LOOKUP
static String	PARM_NAMESERVER
static String	PARM_RECORD_TYPE_A
static String	PARM_RECORD_TYPE_AAAA
static String	PARM_RECORD_TYPE_CNAME
static String	PARM_RECORD_TYPE_MX
static String	PARM_RECORD_TYPE_NS
static String	PARM_RECORD_TYPE_PTR
static String	PARM_RECORD_TYPE_SOA
static String	PARM_RECORD_TYPE_SRV
static String	PARM_RECORD_TYPE_TXT
static String	PARM_RECORD_TYPES
static String	PARM_RESOLUTION_TYPE
static String	PARM_RESOLUTION_TYPE_BOTH
static String	PARM_RESOLUTION_TYPE_DEFAULT
static String	PARM_RESOLUTION_TYPE_EITHER
static String	PARM_RESOLUTION_TYPE_V4
static String	PARM_RESOLUTION_TYPE_V6

Constructor Summary

Constructors

Constructor	Description
DNSResolutionMonitor()

Method Summary

Modifier and Type	Method	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.monitors.support.ParameterSubstitutingMonitor

getRuntimeAttributes, getSubstitutedParameters, parseString, resolveKeyedString

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

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

PARM_RESOLUTION_TYPE

public static final String PARM_RESOLUTION_TYPE

See Also:

Constant Field Values

PARM_RESOLUTION_TYPE_V4

public static final String PARM_RESOLUTION_TYPE_V4

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Constant Field Values

PARM_RESOLUTION_TYPE_V6

public static final String PARM_RESOLUTION_TYPE_V6

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Constant Field Values

PARM_RESOLUTION_TYPE_BOTH

public static final String PARM_RESOLUTION_TYPE_BOTH

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Constant Field Values

PARM_RESOLUTION_TYPE_EITHER

public static final String PARM_RESOLUTION_TYPE_EITHER

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Constant Field Values

PARM_RESOLUTION_TYPE_DEFAULT

public static final String PARM_RESOLUTION_TYPE_DEFAULT

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Constant Field Values

PARM_RECORD_TYPES

public static final String PARM_RECORD_TYPES

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Constant Field Values

PARM_RECORD_TYPE_A

public static final String PARM_RECORD_TYPE_A

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Constant Field Values

PARM_RECORD_TYPE_AAAA

public static final String PARM_RECORD_TYPE_AAAA

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Constant Field Values

PARM_RECORD_TYPE_CNAME

public static final String PARM_RECORD_TYPE_CNAME

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Constant Field Values

PARM_RECORD_TYPE_NS

public static final String PARM_RECORD_TYPE_NS

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Constant Field Values

PARM_RECORD_TYPE_MX

public static final String PARM_RECORD_TYPE_MX

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Constant Field Values

PARM_RECORD_TYPE_PTR

public static final String PARM_RECORD_TYPE_PTR

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Constant Field Values

PARM_RECORD_TYPE_SOA

public static final String PARM_RECORD_TYPE_SOA

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Constant Field Values

PARM_RECORD_TYPE_SRV

public static final String PARM_RECORD_TYPE_SRV

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Constant Field Values

PARM_RECORD_TYPE_TXT

public static final String PARM_RECORD_TYPE_TXT

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Constant Field Values

PARM_NAMESERVER

public static final String PARM_NAMESERVER

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Constant Field Values

PARM_LOOKUP

public static final String PARM_LOOKUP

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Constant Field Values

Constructor Detail

DNSResolutionMonitor

public DNSResolutionMonitor()

Method Detail

poll

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

Description copied from interface: ServiceMonitor

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