com.googlecode.icegem.expiration
Class ExpirationController

java.lang.Object
  com.googlecode.icegem.expiration.ExpirationController

public class ExpirationController
extends java.lang.Object

The class which can expire region entries using custom policy (strategy).

Example:

 
 Region dataRegion = ...;
 Region errorsRegion = ...;
 
 ExpirationController expirationController = new ExpirationController();
 
 long destroyedEntriesNumberForData = expirationController.process(dataRegion,
        new ExpirationPolicy() {
 
                public boolean isExpired(Entry<Object, Object> entry) {
                        // TODO: Add some logic
                        return false;
                }
        });
 
 long destroyedEntriesNumberForErrors = expirationController.process(errorsRegion,
        new ExpirationPolicy() {
 
                public boolean isExpired(Entry<Object, Object> entry) {
                        // TODO: Add some logic
                        return false;
                }
        });
 
 

You can get access to the other regions inside of isExpired(Entry<Object, Object>) method in the following way:

 new ExpirationPolicy() {
 
   public boolean isExpired(Entry<Object, Object> entry) {
     RegionService regionService = entry.getRegion().getRegionService();
     Region errorsRegion = regionService.getRegion("errors");
 
     // TODO: Add some logic
     return false;
   }
 });
 

Constructor Summary

ExpirationController()

Method Summary

long	getPacketDelay() Gets the delay in processing after the packetSize entries, milliseconds
long	getPacketSize() Gets the size of the consistently expired entries packet
long	process(com.gemstone.gemfire.cache.Region<?,?> region, ExpirationPolicy policy) Applies the specified policy on the specified region and returns number of destroyed entries.
void	setPacketDelay(long packetDelay) Sets the delay in processing after the packetSize entries, milliseconds
void	setPacketSize(long packetSize) Gets the size of the consistently expired entries packet

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpirationController

public ExpirationController()

Method Detail

getPacketSize

public long getPacketSize()

Gets the size of the consistently expired entries packet

Returns:

- the packet size

setPacketSize

public void setPacketSize(long packetSize)

Gets the size of the consistently expired entries packet

Parameters:

packetSize - - the packet size

getPacketDelay

public long getPacketDelay()

Gets the delay in processing after the packetSize entries, milliseconds

Returns:

- the packet delay

setPacketDelay

public void setPacketDelay(long packetDelay)

Sets the delay in processing after the packetSize entries, milliseconds

Parameters:

packetDelay - - the packet delay

process

public long process(com.gemstone.gemfire.cache.Region<?,?> region,
                    ExpirationPolicy policy)

Applies the specified policy on the specified region and returns number of destroyed entries.

Parameters:

region - - the region

policy - - the expiration policy

Returns:

- the number of destroyed region entries