Module com.aoapps.appcluster.core

Package com.aoapps.appcluster

Class ResourceDnsMonitor

java.lang.Object

com.aoapps.appcluster.ResourceDnsMonitor

public class ResourceDnsMonitor
extends Object

Monitors the status of a resource by monitoring its role based on DNS entries Monitors DNS entries to determine which nodes are masters and which are slaves while being careful to detect any inconsistent states.

Author:

AO Industries, Inc.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DNS_ATTEMPTS	The number of DNS tries.
static final Duration	DNS_CHECK_INTERVAL	Checks the DNS settings once every 30 seconds.
static final Duration	DNS_CHECK_TIMEOUT	DNS queries time-out at 30 seconds.

Method Summary

Modifier and Type	Method	Description
ResourceDnsResult	getLastResult()	Gets the last result.
Resource<?,?>	getResource()	Gets the resource this monitor is for.

Methods inherited from class java.lang.Object

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

Field Details

DNS_CHECK_INTERVAL

public static final Duration DNS_CHECK_INTERVAL

Checks the DNS settings once every 30 seconds.

DNS_ATTEMPTS

public static final int DNS_ATTEMPTS

The number of DNS tries.

See Also:

• Constant Field Values

DNS_CHECK_TIMEOUT

public static final Duration DNS_CHECK_TIMEOUT

DNS queries time-out at 30 seconds.

Method Details

getResource

public Resource<?,?> getResource()

Gets the resource this monitor is for.

getLastResult

public ResourceDnsResult getLastResult()

Gets the last result.