ResourceDnsMonitor (AO AppCluster Core 2.0.0 API)

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 int`	`DNS_ATTEMPTS`	The number of DNS tries.
`static Duration`	`DNS_CHECK_INTERVAL`	Checks the DNS settings once every 30 seconds.
`static Duration`	`DNS_CHECK_TIMEOUT`	DNS queries time-out at 30 seconds.

Method Summary

All Methods Instance Methods Concrete Methods
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 Detail
  - 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 Detail
  - getResource
```
public Resource<?,?> getResource()
```
    Gets the resource this monitor is for.
  - getLastResult
```
public ResourceDnsResult getLastResult()
```
    Gets the last result.