Package fr.dyade.aaa.agent

Class BufferedMessageInputStream

java.lang.Object

java.io.InputStream

fr.dyade.aaa.agent.MessageInputStream

fr.dyade.aaa.agent.BufferedMessageInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

HttpNetwork.NetworkInputStream, PoolNetwork.NetSession.NetworkInputStream, SimpleNetwork.NetworkInputStream, UDPNetwork.NetworkInputStream

public abstract class BufferedMessageInputStream
extends MessageInputStream

Class used to receive messages through a stream using buffering.

Be careful this InputStream is not synchronized.

Field Summary

Fields

Modifier and Type	Field	Description
protected InputStream	in	The underlying input stream to be read.

Fields inherited from class fr.dyade.aaa.agent.MessageInputStream

buf, compressedFlows, count, pos

Constructor Summary

Constructors

Constructor	Description
BufferedMessageInputStream()	Creates a BufferedMessageInputStream that uses a buffer with default size.
BufferedMessageInputStream(int size)	Creates a BufferedMessageInputStream that uses a buffer with specified size.

Method Summary

Modifier and Type	Method	Description
protected void	clean()	Resets the stream for a new use.
private void	fill()	Fills the empty buffer with more data.
int	read()	Reads the next byte of data from the input stream.
int	read(byte[] b, int off, int len)	Reads up to len bytes of data from the input stream into an array of bytes.
private int	read1(byte[] b, int off, int len)
protected void	readFully(int length)	Reads length bytes of data from the input stream.

Methods inherited from class fr.dyade.aaa.agent.MessageInputStream

read, readHeader, readInt, readMessage, readMessageHeader, readShort

Methods inherited from class java.io.InputStream

available, close, mark, markSupported, nullInputStream, readAllBytes, readNBytes, readNBytes, reset, skip, transferTo

Methods inherited from class java.lang.Object

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

Field Detail

in

protected InputStream in

The underlying input stream to be read.

Constructor Detail

BufferedMessageInputStream

public BufferedMessageInputStream()

Creates a BufferedMessageInputStream that uses a buffer with default size.

BufferedMessageInputStream

public BufferedMessageInputStream(int size)

Creates a BufferedMessageInputStream that uses a buffer with specified size.

Parameters:

size - the buffer size.

Throws:

IllegalArgumentException - if size is less than 0.

Method Detail

clean

protected final void clean()

Resets the stream for a new use. Removes all data.

fill

private final void fill()
                 throws IOException

Fills the empty buffer with more data.

Throws:

IOException - an error occurs.

read

public final int read()
               throws IOException

Reads the next byte of data from the input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.

Specified by:

read in class MessageInputStream

Returns:

the next byte of data, or -1 if the end of the stream is reached.

Throws:

IOException - if an I/O error occurs.

read

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

Reads up to len bytes of data from the input stream into an array of bytes. An attempt is made to read as many as len bytes, but a smaller number may be read. The number of bytes actually read is returned as an integer.

This method blocks until input data is available, end of file is detected, or an exception is thrown.

Specified by:

read in class MessageInputStream

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 the first byte cannot be read for any reason other than end of file, or if the input stream has been closed, or if some other I/O error occurs.

NullPointerException - If b is null.

IndexOutOfBoundsException - If off is negative, len is negative, or len is greater than b.length - off

read1

private final int read1(byte[] b,
                        int off,
                        int len)
                 throws IOException

Throws:

IOException

readFully

protected final void readFully(int length)
                        throws IOException

Reads length bytes of data from the input stream. This method returns when length bytes are available or if end of stream is reached.

Specified by:

readFully in class MessageInputStream

Parameters:

length - number of byte to read.

Throws:

IOException - an error occurs.