com.j_spaces.core

Class MemoryManager

java.lang.Object

com.j_spaces.core.MemoryManager

All Implemented Interfaces:

Closeable, AutoCloseable

public class MemoryManager
extends Object
implements Closeable

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MemoryManager.MemoryEvictionDecision EVICTION DECISIONS.

Constructor Summary

Constructors

Constructor and Description
MemoryManager(String spaceName, String containerName, AbstractCacheManager cacheManager, LeaseManager leaseManager, boolean isPrimary)

Method Summary

Modifier and Type	Method and Description
void	close()
int	getEvictionBatchSize() return the eviction quota as defined
boolean	isEnabled()
boolean	isRestartOnFailover()
void	monitorMemoryUsage(boolean isWriteTypeOperation) check if we reached the memory-usage "watermark".
boolean	monitorMemoryUsageWithNoEviction(boolean isWriteTypeOperation) Perform all memory check but do not perform eviction, instead returns true if eviction should be called this method will be used when loading cache in warm start with LRU mode in this case if the memory limit reached loading of entries from the persistence storage should be stopped instead of perform eviction and continue the cache loading.

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryManager

public MemoryManager(String spaceName,
                     String containerName,
                     AbstractCacheManager cacheManager,
                     LeaseManager leaseManager,
                     boolean isPrimary)

Method Detail

isEnabled

public boolean isEnabled()

isRestartOnFailover

public boolean isRestartOnFailover()

getEvictionBatchSize

public int getEvictionBatchSize()

return the eviction quota as defined

Returns:

eviction quota

monitorMemoryUsage

public void monitorMemoryUsage(boolean isWriteTypeOperation)
                        throws MemoryShortageException

check if we reached the memory-usage "watermark". if memory usage is not enabled do nothing.

Parameters:

isWriteTypeOperation - is write operation

Throws:

MemoryShortageException

monitorMemoryUsageWithNoEviction

public boolean monitorMemoryUsageWithNoEviction(boolean isWriteTypeOperation)

Perform all memory check but do not perform eviction, instead returns true if eviction should be called this method will be used when loading cache in warm start with LRU mode in this case if the memory limit reached loading of entries from the persistence storage should be stopped instead of perform eviction and continue the cache loading.

Parameters:

isWriteTypeOperation - true iff the space operation that tirggerd this check is write or equivalent.

Returns:

true iff eviction should be called

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable