io.atomix.storage.buffer

Class UnsafeDirectBuffer

java.lang.Object

io.atomix.storage.buffer.AbstractBuffer

io.atomix.storage.buffer.NativeBuffer

io.atomix.storage.buffer.UnsafeDirectBuffer

All Implemented Interfaces:

Buffer, BufferInput<Buffer>, BufferOutput<Buffer>, BytesInput<Buffer>, BytesOutput<Buffer>, io.atomix.utils.concurrent.ReferenceCounted<Buffer>, AutoCloseable

public class UnsafeDirectBuffer
extends NativeBuffer

Direct ByteBuffer based buffer.

Author:

Jordan Halterman

Method Summary

Modifier and Type	Method and Description
static UnsafeDirectBuffer	allocate() Allocates a direct buffer with an initial capacity of 4096 and a maximum capacity of Long.MAX_VALUE.
static UnsafeDirectBuffer	allocate(int initialCapacity) Allocates a direct buffer with the given initial capacity.
static UnsafeDirectBuffer	allocate(int initialCapacity, int maxCapacity) Allocates a new direct buffer.
UnsafeDirectBuffer	duplicate() Returns a duplicate of the buffer.

Methods inherited from class io.atomix.storage.buffer.AbstractBuffer

acquire, asReadOnlyBuffer, bytes, capacity, capacity, clear, close, compact, flip, flush, hasRemaining, isDirect, isFile, isReadOnly, limit, limit, mark, maxCapacity, offset, order, order, position, position, read, read, read, read, read, read, read, readBoolean, readBoolean, readByte, readByte, readChar, readChar, readDouble, readDouble, readFloat, readFloat, readInt, readInt, readLong, readLong, readMedium, readMedium, readShort, readShort, readString, readString, readString, readString, readUnsignedByte, readUnsignedByte, readUnsignedInt, readUnsignedInt, readUnsignedMedium, readUnsignedMedium, readUnsignedShort, readUnsignedShort, readUTF8, readUTF8, references, release, remaining, reset, rewind, skip, slice, slice, slice, write, write, write, write, write, write, write, writeBoolean, writeBoolean, writeByte, writeByte, writeChar, writeChar, writeDouble, writeDouble, writeFloat, writeFloat, writeInt, writeInt, writeLong, writeLong, writeMedium, writeMedium, writeShort, writeShort, writeString, writeString, writeString, writeString, writeUnsignedByte, writeUnsignedByte, writeUnsignedInt, writeUnsignedInt, writeUnsignedMedium, writeUnsignedMedium, writeUnsignedShort, writeUnsignedShort, writeUTF8, writeUTF8, zero, zero, zero

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.atomix.storage.buffer.Buffer

array, hasArray

Methods inherited from interface io.atomix.storage.buffer.BufferInput

readBytes

Methods inherited from interface io.atomix.storage.buffer.BufferOutput

writeBytes

Method Detail

allocate

public static UnsafeDirectBuffer allocate()

Allocates a direct buffer with an initial capacity of 4096 and a maximum capacity of Long.MAX_VALUE.

When the buffer is constructed, DirectMemoryAllocator will be used to allocate capacity bytes of off-heap memory. The resulting buffer will be initialized with a capacity of 4096 and have a maximum capacity of Long.MAX_VALUE. The buffer's capacity will dynamically expand as bytes are written to the buffer. The underlying UnsafeDirectBytes will be initialized to the next power of 2.

Returns:

The direct buffer.

See Also:

allocate(int), allocate(int, int)

allocate

public static UnsafeDirectBuffer allocate(int initialCapacity)

Allocates a direct buffer with the given initial capacity.

When the buffer is constructed, DirectMemoryAllocator will be used to allocate capacity bytes of off-heap memory. The resulting buffer will have an initial capacity of capacity. The underlying UnsafeDirectBytes will be initialized to the next power of 2.

Parameters:

initialCapacity - The initial capacity of the buffer to allocate (in bytes).

Returns:

The direct buffer.

Throws:

IllegalArgumentException - If capacity is greater than the maximum allowed count for a ByteBuffer - Integer.MAX_VALUE - 5

See Also:

allocate(), allocate(int, int)

allocate

public static UnsafeDirectBuffer allocate(int initialCapacity,
                                          int maxCapacity)

Allocates a new direct buffer.

When the buffer is constructed, DirectMemoryAllocator will be used to allocate capacity bytes of off-heap memory. The resulting buffer will have an initial capacity of initialCapacity and will be doubled up to maxCapacity as bytes are written to the buffer. The underlying UnsafeDirectBytes will be initialized to the next power of 2.

Parameters:

initialCapacity - The initial capacity of the buffer to allocate (in bytes).

maxCapacity - The maximum capacity of the buffer.

Returns:

The direct buffer.

Throws:

IllegalArgumentException - If capacity or maxCapacity is greater than the maximum allowed count for a ByteBuffer - Integer.MAX_VALUE - 5

See Also:

allocate(), allocate(int)

duplicate

public UnsafeDirectBuffer duplicate()

Description copied from interface: Buffer

Returns a duplicate of the buffer.

Returns:

A duplicate buffer.