Package org.opennms.netmgt.poller.monitors

Class SnmpMonitor

java.lang.Object

org.opennms.netmgt.poller.support.AbstractServiceMonitor

org.opennms.netmgt.poller.monitors.SnmpMonitorStrategy

org.opennms.netmgt.poller.monitors.SnmpMonitor

All Implemented Interfaces:

ServiceMonitor

Direct Known Subclasses:

Win32ServiceMonitor

public class SnmpMonitor
extends SnmpMonitorStrategy

This class is designed to be used by the service poller framework to test the availability of the SNMP service on remote interfaces. The class implements the ServiceMonitor interface that allows it to be used along with other plug-ins by the service poller framework.

This does SNMP and therefore relies on the SNMP configuration so it is not distributable.

Author:

Tarus Balog , Mike Davidson , OpenNMS

Field Summary

Fields

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

Fields inherited from class org.opennms.netmgt.poller.monitors.SnmpMonitorStrategy

EQUALS, GREATER_THAN, GREATER_THAN_EQUALS, hex, LESS_THAN, LESS_THAN_EQUALS, MATCHES, NOT_EQUAL

Constructor Summary

Constructors

Constructor	Description
SnmpMonitor()

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.monitors.SnmpMonitorStrategy

getAgentConfig, getRuntimeAttributes, getStringValue, meetsCriteria

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

Constructor Detail

SnmpMonitor

public SnmpMonitor()

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).

The poll() method is responsible for polling the specified address for SNMP 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.

Throws:

java.lang.RuntimeException - Thrown for any unrecoverable errors.

See Also:

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