org.apache.http.nio.util

Class SharedInputBuffer

java.lang.Object

org.apache.http.nio.util.ExpandableBuffer

org.apache.http.nio.util.SharedInputBuffer

All Implemented Interfaces:

BufferInfo, ContentInputBuffer

@Contract(threading=SAFE_CONDITIONAL)
public class SharedInputBuffer
extends ExpandableBuffer
implements ContentInputBuffer

Implementation of the ContentInputBuffer interface that can be shared by multiple threads, usually the I/O dispatch of an I/O reactor and a worker thread.

The I/O dispatch thread is expect to transfer data from ContentDecoder to the buffer by calling consumeContent(ContentDecoder).

The worker thread is expected to read the data from the buffer by calling read() or read(byte[], int, int) methods.

In case of an abnormal situation or when no longer needed the buffer must be shut down using shutdown() method.

Since:

4.0

Field Summary

Fields inherited from class org.apache.http.nio.util.ExpandableBuffer

buffer, INPUT_MODE, OUTPUT_MODE

Constructor Summary

Constructors

Constructor and Description
SharedInputBuffer(int bufferSize)
SharedInputBuffer(int bufferSize, ByteBufferAllocator allocator)
SharedInputBuffer(int bufferSize, IOControl ioControl, ByteBufferAllocator allocator) Deprecated. (4.3) use SharedInputBuffer(int, ByteBufferAllocator)

Method Summary

Methods

Modifier and Type	Method and Description
int	available() Returns available capacity of this buffer.
int	capacity() Returns the total capacity of this buffer.
void	close()
int	consumeContent(ContentDecoder decoder) Deprecated. (4.3) use consumeContent(ContentDecoder, IOControl)
int	consumeContent(ContentDecoder decoder, IOControl ioControl)
boolean	hasData() Determines if the buffer contains data.
protected boolean	isEndOfStream()
protected boolean	isShutdown()
int	length() Returns the length of this buffer.
int	read() Reads one byte from this buffer.
int	read(byte[] b)
int	read(byte[] b, int off, int len) Reads up to len bytes of data from this buffer into an array of bytes.
void	reset() Resets the buffer by clearing its state and stored content.
void	shutdown()
protected void	waitForData()

Methods inherited from class org.apache.http.nio.util.ExpandableBuffer

clear, ensureCapacity, expand, getMode, setInputMode, setOutputMode, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SharedInputBuffer

@Deprecated
public SharedInputBuffer(int bufferSize,
                            IOControl ioControl,
                            ByteBufferAllocator allocator)

Deprecated. (4.3) use SharedInputBuffer(int, ByteBufferAllocator)

SharedInputBuffer

public SharedInputBuffer(int bufferSize,
                 ByteBufferAllocator allocator)

Since:

4.3

SharedInputBuffer

public SharedInputBuffer(int bufferSize)

Since:

4.3

Method Detail

reset

public void reset()

Description copied from interface: ContentInputBuffer

Resets the buffer by clearing its state and stored content.

Specified by:

reset in interface ContentInputBuffer

consumeContent

@Deprecated
public int consumeContent(ContentDecoder decoder)
                   throws IOException

Deprecated. (4.3) use consumeContent(ContentDecoder, IOControl)

Description copied from interface: ContentInputBuffer

Reads content from the given ContentDecoder and stores it in this buffer.

Specified by:

consumeContent in interface ContentInputBuffer

Parameters:

decoder - the content decoder.

Returns:

number of bytes read.

Throws:

IOException - in case of an I/O error.

consumeContent

public int consumeContent(ContentDecoder decoder,
                 IOControl ioControl)
                   throws IOException

Throws:

IOException

Since:

4.3

hasData

public boolean hasData()

Description copied from class: ExpandableBuffer

Determines if the buffer contains data.

Overrides:

hasData in class ExpandableBuffer

Returns:

true if there is data in the buffer, false otherwise.

available

public int available()

Description copied from class: ExpandableBuffer

Returns available capacity of this buffer.

Specified by:

available in interface BufferInfo

Overrides:

available in class ExpandableBuffer

Returns:

buffer length.

capacity

public int capacity()

Description copied from class: ExpandableBuffer

Returns the total capacity of this buffer.

Specified by:

capacity in interface BufferInfo

Overrides:

capacity in class ExpandableBuffer

Returns:

total capacity.

length

public int length()

Description copied from class: ExpandableBuffer

Returns the length of this buffer.

Specified by:

length in interface BufferInfo

Overrides:

length in class ExpandableBuffer

Returns:

buffer length.

waitForData

protected void waitForData()
                    throws IOException

Throws:

IOException

close

public void close()

shutdown

public void shutdown()

isShutdown

protected boolean isShutdown()

isEndOfStream

protected boolean isEndOfStream()

read

public int read()
         throws IOException

Description copied from interface: ContentInputBuffer

Reads one byte from this buffer. If the buffer is empty this method can throw a runtime exception. The exact type of runtime exception thrown by this method depends on implementation. This method returns -1 if the end of content stream has been reached.

Specified by:

read in interface ContentInputBuffer

Returns:

one byte

Throws:

IOException

read

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

Description copied from interface: ContentInputBuffer

Reads up to len bytes of data from this buffer into an array of bytes. The exact number of bytes read depends how many bytes are stored in the buffer.

If off is negative, or len is negative, or off+len is greater than the length of the array b, this method can throw a runtime exception. The exact type of runtime exception thrown by this method depends on implementation. This method returns -1 if the end of content stream has been reached.

Specified by:

read in interface ContentInputBuffer

Parameters:

b - the buffer into which the data is read.

off - the start offset in array b at which the data is written.

len - the maximum number of bytes to read.

Returns:

the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

Throws:

IOException - if an I/O error occurs.

read

public int read(byte[] b)
         throws IOException

Throws:

IOException