org.eclipse.jetty.http.gzip

Class AbstractCompressedStream

java.lang.Object

java.io.OutputStream

javax.servlet.ServletOutputStream

org.eclipse.jetty.http.gzip.AbstractCompressedStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

public abstract class AbstractCompressedStream
extends javax.servlet.ServletOutputStream

Skeletal implementation of a CompressedStream. This class adds compression features to a ServletOutputStream and takes care of setting response headers, etc. Major work and configuration is done here. Subclasses using different kinds of compression only have to implement the abstract methods doCompress() and setContentEncoding() using the desired compression and setting the appropriate Content-Encoding header string.

Field Summary

Fields

Modifier and Type	Field and Description
protected ByteArrayOutputStream2	_bOut
protected int	_bufferSize
protected boolean	_closed
protected java.util.zip.DeflaterOutputStream	_compressedOutputStream
protected long	_contentLength
protected boolean	_doNotCompress
protected int	_minCompressSize
protected java.io.OutputStream	_out
protected javax.servlet.http.HttpServletRequest	_request
protected javax.servlet.http.HttpServletResponse	_response

Constructor Summary

Constructors

Constructor and Description
AbstractCompressedStream(java.lang.String encoding, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, long contentLength, int bufferSize, int minCompressSize) Instantiates a new compressed stream.

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
protected abstract java.util.zip.DeflaterOutputStream	createStream() Create the stream fitting to the underlying compression type.
void	doCompress() Do compress.
void	doNotCompress() Do not compress.
void	finish() Finish.
void	flush()
java.io.OutputStream	getOutputStream()
boolean	isClosed()
protected java.io.PrintWriter	newWriter(java.io.OutputStream out, java.lang.String encoding) Allows derived implementations to replace PrintWriter implementation.
void	resetBuffer() Reset buffer.
void	setContentLength(long length) Sets the content length.
protected void	setHeader(java.lang.String name, java.lang.String value)
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int b)

Methods inherited from class javax.servlet.ServletOutputStream

print, print, print, print, print, print, print, println, println, println, println, println, println, println, println

Methods inherited from class java.lang.Object

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

Field Detail

_request

protected javax.servlet.http.HttpServletRequest _request

_response

protected javax.servlet.http.HttpServletResponse _response

_out

protected java.io.OutputStream _out

_bOut

protected ByteArrayOutputStream2 _bOut

_compressedOutputStream

protected java.util.zip.DeflaterOutputStream _compressedOutputStream

_closed

protected boolean _closed

_bufferSize

protected int _bufferSize

_minCompressSize

protected int _minCompressSize

_contentLength

protected long _contentLength

_doNotCompress

protected boolean _doNotCompress

Constructor Detail

AbstractCompressedStream

public AbstractCompressedStream(java.lang.String encoding,
                        javax.servlet.http.HttpServletRequest request,
                        javax.servlet.http.HttpServletResponse response,
                        long contentLength,
                        int bufferSize,
                        int minCompressSize)
                         throws java.io.IOException

Instantiates a new compressed stream.

Parameters:

request - the request

response - the response

contentLength - the content length

bufferSize - the buffer size

minCompressSize - the min compress size

Throws:

java.io.IOException - Signals that an I/O exception has occurred.

Method Detail

resetBuffer

public void resetBuffer()

Reset buffer.

setContentLength

public void setContentLength(long length)

Sets the content length.

Parameters:

length - the new content length

flush

public void flush()
           throws java.io.IOException

Specified by:

flush in interface java.io.Flushable

Overrides:

flush in class java.io.OutputStream

Throws:

java.io.IOException

See Also:

OutputStream.flush()

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.OutputStream

Throws:

java.io.IOException

See Also:

OutputStream.close()

finish

public void finish()
            throws java.io.IOException

Finish.

Throws:

java.io.IOException - Signals that an I/O exception has occurred.

write

public void write(int b)
           throws java.io.IOException

Specified by:

write in class java.io.OutputStream

Throws:

java.io.IOException

See Also:

OutputStream.write(int)

write

public void write(byte[] b)
           throws java.io.IOException

Overrides:

write in class java.io.OutputStream

Throws:

java.io.IOException

See Also:

OutputStream.write(byte[])

write

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

Overrides:

write in class java.io.OutputStream

Throws:

java.io.IOException

See Also:

OutputStream.write(byte[], int, int)

doCompress

public void doCompress()
                throws java.io.IOException

Do compress.

Throws:

java.io.IOException - Signals that an I/O exception has occurred.

doNotCompress

public void doNotCompress()
                   throws java.io.IOException

Do not compress.

Throws:

java.io.IOException - Signals that an I/O exception has occurred.

getOutputStream

public java.io.OutputStream getOutputStream()

See Also:

CompressedStream

isClosed

public boolean isClosed()

See Also:

CompressedStream

newWriter

protected java.io.PrintWriter newWriter(java.io.OutputStream out,
                            java.lang.String encoding)
                                 throws java.io.UnsupportedEncodingException

Allows derived implementations to replace PrintWriter implementation.

Throws:

java.io.UnsupportedEncodingException

setHeader

protected void setHeader(java.lang.String name,
             java.lang.String value)

createStream

protected abstract java.util.zip.DeflaterOutputStream createStream()
                                                            throws java.io.IOException

Create the stream fitting to the underlying compression type.

Throws:

java.io.IOException - Signals that an I/O exception has occurred.