org.opennms.netmgt.poller.monitors

Class TrivialTimeMonitor

java.lang.Object

org.opennms.netmgt.poller.monitors.AbstractServiceMonitor

org.opennms.netmgt.poller.monitors.TrivialTimeMonitor

All Implemented Interfaces:

ServiceMonitor

@Distributable
public final class TrivialTimeMonitor
extends AbstractServiceMonitor

This class is designed to be used by the service poller framework to test the availability of the trivial UNIX "time" 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.

Author:

Jeff Gehlbach, OpenNMS

Constructor Summary

Constructors

Constructor and Description
TrivialTimeMonitor()

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.
PollStatus	pollTimeTcp(MonitoredService svc, Map<String,Object> parameters, PollStatus serviceStatus, TimeoutTracker tracker, InetAddress ipv4Addr, int port, int allowedSkew, boolean persistSkew) pollTimeTcp
PollStatus	pollTimeUdp(MonitoredService svc, Map<String,Object> parameters, PollStatus serviceStatus, TimeoutTracker tracker, InetAddress ipv4Addr, int port, int allowedSkew, boolean persistSkew) pollTimeUdp
void	storeResult(PollStatus serviceStatus, Number skew, Double responseTime, boolean persistSkew) storeResult

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

getKeyedBoolean, getKeyedInteger, getKeyedLong, getKeyedObject, getKeyedString, initialize, initialize, release, release

Methods inherited from class java.lang.Object

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

Constructor Detail

TrivialTimeMonitor

public TrivialTimeMonitor()

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 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.

Poll the specified address for service availability. During the poll an attempt is made to retrieve the time value from the remote system. This can be done via either TCP or UDP depending on the provided parameters (default TCP). If the time value returned is within the specified number of seconds of the local system's clock time, then the service is considered available.

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

storeResult

public void storeResult(PollStatus serviceStatus,
                        Number skew,
                        Double responseTime,
                        boolean persistSkew)

storeResult

Parameters:

serviceStatus - a PollStatus object.

skew - a Number object.

responseTime - a Double object.

persistSkew - a boolean.

pollTimeTcp

public PollStatus pollTimeTcp(MonitoredService svc,
                              Map<String,Object> parameters,
                              PollStatus serviceStatus,
                              TimeoutTracker tracker,
                              InetAddress ipv4Addr,
                              int port,
                              int allowedSkew,
                              boolean persistSkew)

pollTimeTcp

Parameters:

svc - a MonitoredService object.

parameters - a Map object.

serviceStatus - a PollStatus object.

tracker - a TimeoutTracker object.

ipv4Addr - a InetAddress object.

port - a int.

allowedSkew - a int.

persistSkew - a boolean.

Returns:

a PollStatus object.

pollTimeUdp

public PollStatus pollTimeUdp(MonitoredService svc,
                              Map<String,Object> parameters,
                              PollStatus serviceStatus,
                              TimeoutTracker tracker,
                              InetAddress ipv4Addr,
                              int port,
                              int allowedSkew,
                              boolean persistSkew)

pollTimeUdp

Parameters:

svc - a MonitoredService object.

parameters - a Map object.

serviceStatus - a PollStatus object.

tracker - a TimeoutTracker object.

ipv4Addr - a InetAddress object.

port - a int.

allowedSkew - a int.

persistSkew - a boolean.

Returns:

a PollStatus object.