org.apache.hadoop.hbase.io

类 ByteBufferListOutputStream

java.lang.Object

java.io.OutputStream

org.apache.hadoop.hbase.io.ByteBufferOutputStream

org.apache.hadoop.hbase.io.ByteBufferListOutputStream

所有已实现的接口:

Closeable, Flushable, AutoCloseable, ByteBufferWriter

@InterfaceAudience.Private
public class ByteBufferListOutputStream
extends ByteBufferOutputStream

An OutputStream which writes data into ByteBuffers. It will try to get ByteBuffer, as and when needed, from the passed pool. When pool is not giving a ByteBuffer it will create one on heap. Make sure to call releaseResources() method once the Stream usage is over and data is transferred to the wanted destination. Not thread safe!

字段概要

字段

限定符和类型	字段和说明
protected List<ByteBuffer>	allBufs
protected List<ByteBuffer>	bufsFromPool

从类继承的字段 org.apache.hadoop.hbase.io.ByteBufferOutputStream

curBuf

构造器概要

构造器

构造器和说明
ByteBufferListOutputStream(ByteBufferPool pool)

方法概要

限定符和类型	方法和说明
protected void	checkSizeAndGrow(int extra)
ByteBuffer	getByteBuffer() This flips the underlying BB so be sure to use it _last_!
List<ByteBuffer>	getByteBuffers() We can be assured that the buffers returned by this method are all flipped
void	releaseResources() Release the resources it uses (The ByteBuffers) which are obtained from pool.
int	size()
byte[]	toByteArray(int offset, int length)
void	write(byte[] b, int off, int len)
void	write(ByteBuffer b, int off, int len) Writes len bytes from the specified ByteBuffer starting at offset off
void	writeTo(OutputStream out) Writes the complete contents of this byte buffer output stream to the specified output stream argument.

从类继承的方法 org.apache.hadoop.hbase.io.ByteBufferOutputStream

close, flush, write, write, writeInt

从类继承的方法 java.lang.Object

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

字段详细资料

allBufs

protected List<ByteBuffer> allBufs

bufsFromPool

protected List<ByteBuffer> bufsFromPool

构造器详细资料

ByteBufferListOutputStream

public ByteBufferListOutputStream(ByteBufferPool pool)

方法详细资料

size

public int size()

覆盖:

size 在类中 ByteBufferOutputStream

getByteBuffer

public ByteBuffer getByteBuffer()

从类复制的说明: ByteBufferOutputStream

This flips the underlying BB so be sure to use it _last_!

覆盖:

getByteBuffer 在类中 ByteBufferOutputStream

返回:

ByteBuffer

checkSizeAndGrow

protected void checkSizeAndGrow(int extra)

覆盖:

checkSizeAndGrow 在类中 ByteBufferOutputStream

writeTo

public void writeTo(OutputStream out)
             throws IOException

从类复制的说明: ByteBufferOutputStream

Writes the complete contents of this byte buffer output stream to the specified output stream argument.

覆盖:

writeTo 在类中 ByteBufferOutputStream

参数:

out - the output stream to which to write the data.

抛出:

IOException - if an I/O error occurs.

releaseResources

public void releaseResources()

Release the resources it uses (The ByteBuffers) which are obtained from pool. Call this only when all the data is fully used. And it must be called at the end of usage else we will leak ByteBuffers from pool.

toByteArray

public byte[] toByteArray(int offset,
                          int length)

覆盖:

toByteArray 在类中 ByteBufferOutputStream

getByteBuffers

public List<ByteBuffer> getByteBuffers()

We can be assured that the buffers returned by this method are all flipped

返回:

list of bytebuffers

write

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException

覆盖:

write 在类中 ByteBufferOutputStream

抛出:

IOException

write

public void write(ByteBuffer b,
                  int off,
                  int len)
           throws IOException

从接口复制的说明: ByteBufferWriter

Writes len bytes from the specified ByteBuffer starting at offset off

指定者:

write 在接口中 ByteBufferWriter

覆盖:

write 在类中 ByteBufferOutputStream

参数:

b - the data.

off - the start offset in the data.

len - the number of bytes to write.

抛出:

IOException - if an I/O error occurs.