Package org.glassfish.grizzly.memory

Class AbstractMemoryManager<E extends Buffer>

java.lang.Object

org.glassfish.grizzly.memory.AbstractMemoryManager<E>

All Implemented Interfaces:

MemoryManager<E>, ThreadLocalPoolProvider, MonitoringAware<MemoryProbe>

Direct Known Subclasses:

ByteBufferManager, HeapMemoryManager

public abstract class AbstractMemoryManager<E extends Buffer>
extends Object
implements MemoryManager<E>, ThreadLocalPoolProvider

A MemoryManager abstraction to provide utilities that may be useful across different MemoryManager implementations.

Since:

2.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static interface	AbstractMemoryManager.TrimAware	This is a marker interface indicating a particular Buffer implementation can be trimmed.

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_MAX_BUFFER_SIZE	The maximum size of the memory pool that is to be maintained by either the MemoryManager itself or any ThreadLocalPools.
protected int	maxBufferSize
protected DefaultMonitoringConfig<MemoryProbe>	monitoringConfig	Basic monitoring support.

Fields inherited from interface org.glassfish.grizzly.memory.MemoryManager

DEFAULT_MEMORY_MANAGER

Constructor Summary

Constructors

Constructor	Description
AbstractMemoryManager()	Creates a new AbstractMemoryManager using a max buffer size of 65536.
AbstractMemoryManager(int maxBufferSize)	Creates a new AbstractMemoryManager using the specified buffer size.

Method Summary

Modifier and Type	Method	Description
protected Object	allocateFromPool(ThreadLocalPool threadLocalCache, int size)	Allocate a Buffer using the provided ThreadLocalPool.
protected abstract Object	createJmxManagementObject()
int	getMaxBufferSize()
int	getReadyThreadBufferSize()	Get the size of local thread memory pool.
protected static ThreadLocalPool	getThreadLocalPool()	Get thread associated buffer pool.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.glassfish.grizzly.memory.MemoryManager

allocate, allocateAtLeast, reallocate, release, willAllocateDirect

Methods inherited from interface org.glassfish.grizzly.monitoring.MonitoringAware

getMonitoringConfig

Methods inherited from interface org.glassfish.grizzly.memory.ThreadLocalPoolProvider

createThreadLocalPool

Field Detail

DEFAULT_MAX_BUFFER_SIZE

public static final int DEFAULT_MAX_BUFFER_SIZE

The maximum size of the memory pool that is to be maintained by either the MemoryManager itself or any ThreadLocalPools.

See Also:

Constant Field Values

monitoringConfig

protected final DefaultMonitoringConfig<MemoryProbe> monitoringConfig

Basic monitoring support. Concrete implementations of this class need only to implement the createJmxManagementObject() method to plug into the Grizzly 2.0 JMX framework.

maxBufferSize

protected final int maxBufferSize

Constructor Detail

AbstractMemoryManager

public AbstractMemoryManager()

Creates a new AbstractMemoryManager using a max buffer size of 65536.

AbstractMemoryManager

public AbstractMemoryManager(int maxBufferSize)

Creates a new AbstractMemoryManager using the specified buffer size.

Parameters:

maxBufferSize - max size of the maintained buffer.

Method Detail

getReadyThreadBufferSize

public int getReadyThreadBufferSize()

Get the size of local thread memory pool.

Returns:

the size of local thread memory pool.

getMaxBufferSize

public int getMaxBufferSize()

Returns:

the max size of the buffer maintained by this AbstractMemoryManager.

allocateFromPool

protected Object allocateFromPool(ThreadLocalPool threadLocalCache,
                                  int size)

Allocate a Buffer using the provided ThreadLocalPool.

Parameters:

threadLocalCache - the ThreadLocalPool to allocate from.

size - the amount to allocate.

Returns:

an memory buffer, or null if the requested size exceeds the remaining free memory of the ThreadLocalPool.

createJmxManagementObject

protected abstract Object createJmxManagementObject()

Returns:

the JMX Object used to register/deregister with the JMX runtime.

getThreadLocalPool

protected static ThreadLocalPool getThreadLocalPool()

Get thread associated buffer pool.

Returns:

thread associated buffer pool. This method may return null if the current thread doesn't have a buffer pool associated with it.