HistorianLicense

java.lang.Object

com.inductiveautomation.historian.gateway.license.HistorianLicense

All Implemented Interfaces:: LicenseStateUpdateListener, EventListener

public class HistorianLicense extends Object implements LicenseStateUpdateListener

Nested Class Summary

Nested Classes

Modifier and Type

Class

Description

protected static enum

HistorianLicense.LicenseLevel
Method Summary

Modifier and Type

Method

Description

void

addListener(LicenseStateUpdateListener listener)

boolean

canQuery()

boolean

canStore()

static HistorianLicense.LicenseLevel

getCurrentLevel(GatewayContext context)

Returns whether tag history is available and not demo expired.

static HistorianLicense

getOrCreate(GatewayContext context)

I prefer this static creation in order to avoid implying the adding of listeners in the constructor.

boolean

isDemoExpired()

void

licenseStateUpdated(LicenseStateUpdateEvent e)

The LicenseState for the module specified in the LicenseStateChangeEvent has been updated.

protected void

refreshState()

void

removeListener(LicenseStateUpdateListener listener)

void

shutdown()

protected void

startup()

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

Method Details
- getOrCreate
  
  public static HistorianLicense getOrCreate(GatewayContext context)
  
  I prefer this static creation in order to avoid implying the adding of listeners in the constructor. That is, it balances shutdown()
- startup
  
  protected void startup()
- shutdown
  
  public void shutdown()
- addListener
  
  public void addListener(LicenseStateUpdateListener listener)
- removeListener
  
  public void removeListener(LicenseStateUpdateListener listener)
- canStore
  
  public boolean canStore()
- canQuery
  
  public boolean canQuery()
- isDemoExpired
  
  public boolean isDemoExpired()
- licenseStateUpdated
  
  public void licenseStateUpdated(LicenseStateUpdateEvent e)
  
  Description copied from interface: LicenseStateUpdateListener
  
  The LicenseState for the module specified in the LicenseStateChangeEvent has been updated. Module id of empty-string represents the license state for the Ignition platform itself.
  
  Specified by:
  
  licenseStateUpdated in interface LicenseStateUpdateListener
  
  Parameters:
  
  e - The LicenseStateUpdateEvent
- refreshState
  
  protected void refreshState()
- getCurrentLevel
  
  public static HistorianLicense.LicenseLevel getCurrentLevel(GatewayContext context)
  
  Returns whether tag history is available and not demo expired.