EdgeHistoryLicense

java.lang.Object
- com.inductiveautomation.gateway.tags.history.edge.EdgeHistoryLicense

All Implemented Interfaces:

LicenseStateUpdateListener, java.util.EventListener
```
public class EdgeHistoryLicense
extends java.lang.Object
implements LicenseStateUpdateListener
```
This will be used to manage licensing for the edge historian.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static EdgeHistoryLicense`	`create(GatewayContext context)`	I prefer this static creation in order to avoid implying the adding of listeners in the constructor.
`boolean`	`isActive()`
`static boolean`	`isActive(GatewayContext context)`	Returns whether tag history is available and not demo expired.
`boolean`	`isUnlimited()`
`static boolean`	`isUnlimited(GatewayContext context)`	We allow unlimited local history with any kind of tag historian license installed.
`void`	`licenseStateUpdated(LicenseStateUpdateEvent e)`	The LicenseState for the module specified in the LicenseStateChangeEvent has been updated.
`protected void`	`refreshState()`
`void`	`shutdown()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - create
```
public static EdgeHistoryLicense create(GatewayContext context)
```
    I prefer this static creation in order to avoid implying the adding of listeners in the constructor. That is, it balances shutdown()
  - shutdown
```
public void shutdown()
```
  - isActive
```
public boolean isActive()
```
  - isUnlimited
```
public boolean isUnlimited()
```
  - licenseStateUpdated
```
public void licenseStateUpdated(LicenseStateUpdateEvent e)
```
    Description copied from interface: LicenseStateUpdateListener
    
    The LicenseState for the module specified in the LicenseStateChangeEvent has been updated. It may or may not have changed.
    
    Specified by:
    
    licenseStateUpdated in interface LicenseStateUpdateListener
    
    Parameters:
    
    e - The LicenseStateUpdateEvent
  - refreshState
```
protected void refreshState()
```
  - isActive
```
public static boolean isActive(GatewayContext context)
```
    Returns whether tag history is available and not demo expired.
  - isUnlimited
```
public static boolean isUnlimited(GatewayContext context)
```
    We allow unlimited local history with any kind of tag historian license installed.