Grizzly NIO 5.0.2 · org.glassfish.grizzly.memory.MemoryManager

Modifier and Type	Field and Description
public static final MemoryManager<E extends Buffer>	DEFAULT_MEMORY_MANAGER The default `MemoryManager` implementation used by all created builder instances.

Method Summary

Modifier and Type	Method and Description
public E	Returns: allocated `Buffer`. allocate(int `Buffer` size to be allocated. size) Allocated `Buffer` of the required size.
public E	Returns: allocated `Buffer`. allocateAtLeast(int the min `Buffer` size to be allocated. size) Allocated `Buffer` at least of the provided size.
public E	Returns: reallocated `Buffer`. reallocate(E old `Buffer` to be reallocated. oldBuffer, int new `Buffer` required size. newSize) Reallocate `Buffer` to a required size.
public void	release(E `Buffer` to be released. buffer) Release `Buffer`.
public boolean	willAllocateDirect(int size) Return `true` if next `allocate(int)` or `allocateAtLeast(int)` call, made in the current thread for the given memory size, going to return a `Buffer` based on direct `java.nio.ByteBuffer`, or `false` otherwise.

Inherited from org.glassfish.grizzly.monitoring.MonitoringAware:: getMonitoringConfig

Field Detail

DEFAULT_MEMORY_MANAGER back to summary

DEFAULT_MEMORY_MANAGER	back to summary
public static final MemoryManager<E extends Buffer> DEFAULT_MEMORY_MANAGER The default `MemoryManager` implementation used by all created builder instances. The default may be changed by one of two methods: Setting the system property org.glassfish.grizzly.DEFAULT_MEMORY_MANAGER with the fully qualified name of the class that implements the MemoryManager interface. Note that this class must be public and have a public no-arg constructor. Setting the system property org.glassfish.grizzly.MEMORY_MANAGER_FACTORY with the fully qualified name of the class that implements the `org.glassfish.grizzly.memory.DefaultMemoryManagerFactory` interface. Note that this class must be public and have a public no-arg constructor.

public static final MemoryManager<E extends Buffer> DEFAULT_MEMORY_MANAGER

The default MemoryManager implementation used by all created builder instances.

The default may be changed by one of two methods:

Setting the system property org.glassfish.grizzly.DEFAULT_MEMORY_MANAGER with the fully qualified name of the class that implements the MemoryManager interface. Note that this class must be public and have a public no-arg constructor.
Setting the system property org.glassfish.grizzly.MEMORY_MANAGER_FACTORY with the fully qualified name of the class that implements the org.glassfish.grizzly.memory.DefaultMemoryManagerFactory interface. Note that this class must be public and have a public no-arg constructor.

Method Detail

allocate back to summary

allocate	back to summary
public E allocate(int size) Allocated `Buffer` of the required size. Parameters size:int `Buffer` size to be allocated. Returns:E allocated `Buffer`.

public E allocate(int size)

Allocated Buffer of the required size.

Parameters

size:int: Buffer size to be allocated.

Returns:E

allocated Buffer.

allocateAtLeast back to summary

allocateAtLeast	back to summary
public E allocateAtLeast(int size) Allocated `Buffer` at least of the provided size. This could be useful for usecases like Socket.read(...), where we're not sure how many bytes are available, but want to read as much as possible. Parameters size:int the min `Buffer` size to be allocated. Returns:E allocated `Buffer`.

public E allocateAtLeast(int size)

Allocated Buffer at least of the provided size. This could be useful for usecases like Socket.read(...), where we're not sure how many bytes are available, but want to read as much as possible.

Parameters

size:int: the min Buffer size to be allocated.

Returns:E

allocated Buffer.

reallocate back to summary

reallocate	back to summary
public E reallocate(E oldBuffer, int newSize) Reallocate `Buffer` to a required size. Implementation may choose the way, how reallocation could be done, either by allocating new `Buffer` of required size and copying old `Buffer` content there, or perform more complex logic related to memory pooling etc. Parameters oldBuffer:E old `Buffer` to be reallocated. newSize:int new `Buffer` required size. Returns:E reallocated `Buffer`.

public E reallocate(E oldBuffer, int newSize)

Reallocate Buffer to a required size. Implementation may choose the way, how reallocation could be done, either by allocating new Buffer of required size and copying old Buffer content there, or perform more complex logic related to memory pooling etc.

Parameters

oldBuffer:E: old Buffer to be reallocated.
newSize:int: new Buffer required size.

Returns:E

reallocated Buffer.

release back to summary

release	back to summary
public void release(E buffer) Release `Buffer`. Implementation may ignore releasing and let JVM Garbage collector to take care about the `Buffer`, or return `Buffer` to pool, in case of more complex `MemoryManager` implementation. Parameters buffer:E `Buffer` to be released.

public void release(E buffer)

Release Buffer. Implementation may ignore releasing and let JVM Garbage collector to take care about the Buffer, or return Buffer to pool, in case of more complex MemoryManager implementation.

Parameters

buffer:E: Buffer to be released.

willAllocateDirect	back to summary
public boolean willAllocateDirect(int size) Return `true` if next `allocate(int)` or `allocateAtLeast(int)` call, made in the current thread for the given memory size, going to return a `Buffer` based on direct `java.nio.ByteBuffer`, or `false` otherwise.

public Interface MemoryManager<E extends Buffer>

Field Summary

Method Summary

Field Detail

Method Detail