org.glassfish.grizzly.http.io

Class InputBuffer

java.lang.Object

org.glassfish.grizzly.http.io.InputBuffer

public class InputBuffer
extends Object

Abstraction exposing both byte and character methods to read content from the HTTP messaging system in Grizzly.

Constructor Summary

Constructors

Constructor and Description
InputBuffer()

Method Summary

Modifier and Type	Method and Description
boolean	append(HttpContent httpContent) Appends the specified Buffer to the internal composite Buffer.
int	available()
int	availableChar()
protected HttpContent	blockingRead() Read next chunk of data in this thread, block if needed.
void	close()
void	fillFully(int length) /** Fill the buffer (blocking) up to the requested length.
protected void	finished() When invoked, this method will call ReadHandler.onAllDataRead() on the current ReadHandler (if any).
org.glassfish.grizzly.Buffer	getBuffer() Returns the duplicate of the underlying Buffer used to buffer incoming request data.
org.glassfish.grizzly.ReadHandler	getReadHandler()
protected Executor	getThreadPool()
void	initialize(HttpHeader httpHeader, org.glassfish.grizzly.filterchain.FilterChainContext ctx) Per-request initialization required for the InputBuffer to function properly.
void	initiateAsyncronousDataReceiving() Initiates asynchronous data receiving.
boolean	isAsyncEnabled() Deprecated. will always return true
boolean	isClosed()
boolean	isFinished()
void	mark(int readAheadLimit) Supported with binary and character data.
boolean	markSupported() Only supported with binary data.
void	notifyAvailable(org.glassfish.grizzly.ReadHandler handler) Installs a ReadHandler that will be notified when any data becomes available to read without blocking.
void	notifyAvailable(org.glassfish.grizzly.ReadHandler handler, int size) Installs a ReadHandler that will be notified when the specified amount of data is available to be read without blocking.
void	processingChars() This method should be called if the InputBuffer is being used in conjunction with a Reader implementation.
int	read(byte[] b, int off, int len)
int	read(char[] cbuf, int off, int len)
int	read(CharBuffer target)
org.glassfish.grizzly.Buffer	readBuffer()
org.glassfish.grizzly.Buffer	readBuffer(int size)
int	readByte() This method always blocks.
int	readChar()
boolean	ready()
int	readyData() Depending on the InputBuffer mode, method will return either number of available bytes or characters ready to be read without blocking.
void	recycle() Recycle this InputBuffer for reuse.
void	replayPayload(org.glassfish.grizzly.Buffer buffer)
void	reset() Only supported with binary data.
void	setAsyncEnabled(boolean asyncEnabled) Deprecated. InputBuffer always supports async mode
void	setDefaultEncoding(String encoding) Set the default character encoding for this InputBuffer, which would be applied if no encoding was explicitly set on HTTP HttpRequestPacket and character decoding wasn't started yet.
long	skip(long n) Skips the specified number of bytes/characters.
long	skip(long n, boolean block) Deprecated. pls. use skip(long), the block parameter will be ignored
void	terminate() Invoke ReadHandler.onError(Throwable) (assuming a ReadHandler is available) } passing a {#link CancellationException} if the current Connection is open, or a {#link EOFException} if the connection was unexpectedly closed.
protected void	updateInputContentBuffer(org.glassfish.grizzly.Buffer buffer)

Methods inherited from class java.lang.Object

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

Constructor Detail

InputBuffer

public InputBuffer()

Method Detail

initialize

public void initialize(HttpHeader httpHeader,
                       org.glassfish.grizzly.filterchain.FilterChainContext ctx)

Per-request initialization required for the InputBuffer to function properly.

Parameters:

httpHeader - the header from which input will be obtained.

ctx - the FilterChainContext for the chain processing this request

setDefaultEncoding

public void setDefaultEncoding(String encoding)

Set the default character encoding for this InputBuffer, which would be applied if no encoding was explicitly set on HTTP HttpRequestPacket and character decoding wasn't started yet.

recycle

public void recycle()

Recycle this InputBuffer for reuse.

processingChars

public void processingChars()

This method should be called if the InputBuffer is being used in conjunction with a Reader implementation. If this method is not called, any character-based methods called on this InputBuffer will throw a IllegalStateException.

readByte

public int readByte()
             throws IOException

This method always blocks.

Throws:

IOException

See Also:

InputStream.read()

read

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

Throws:

IOException

See Also:

InputStream.read(byte[], int, int)

readyData

public int readyData()

Depending on the InputBuffer mode, method will return either number of available bytes or characters ready to be read without blocking.

Returns:

depending on the InputBuffer mode, method will return either number of available bytes or characters ready to be read without blocking.

available

public int available()

See Also:

InputStream.available()

getBuffer

public org.glassfish.grizzly.Buffer getBuffer()

Returns the duplicate of the underlying Buffer used to buffer incoming request data. The content of the returned buffer will be that of the underlying buffer. Changes to returned buffer's content will be visible in the underlying buffer, and vice versa; the two buffers' position, limit, and mark values will be independent.

Returns:

the duplicate of the underlying Buffer used to buffer incoming request data.

readBuffer

public org.glassfish.grizzly.Buffer readBuffer()

Returns:

the underlying Buffer used to buffer incoming request data. Unlike getBuffer(), this method detaches the returned Buffer, so user code becomes responsible for handling the Buffer.

readBuffer

public org.glassfish.grizzly.Buffer readBuffer(int size)

Parameters:

size - the requested size of the Buffer to be returned.

Returns:

the Buffer of a given size, which represents a chunk of the underlying Buffer which contains incoming request data. This method detaches the returned Buffer, so user code becomes responsible for handling its life-cycle.

getReadHandler

public org.glassfish.grizzly.ReadHandler getReadHandler()

Returns:

the ReadHandler current in use, if any.

read

public int read(CharBuffer target)
         throws IOException

Throws:

IOException

See Also:

Reader.read(java.nio.CharBuffer)

readChar

public int readChar()
             throws IOException

Throws:

IOException

See Also:

Reader.read()

read

public int read(char[] cbuf,
                int off,
                int len)
         throws IOException

Throws:

IOException

See Also:

Reader.read(char[], int, int)

ready

public boolean ready()

See Also:

Reader.ready()

fillFully

public void fillFully(int length)
               throws IOException

/** Fill the buffer (blocking) up to the requested length.

Parameters:

length - how much content should attempt to buffer, -1 means buffer entire request.

Throws:

IOException

availableChar

public int availableChar()

mark

public void mark(int readAheadLimit)

Supported with binary and character data.

See Also:

InputStream.mark(int), Reader.mark(int)

markSupported

public boolean markSupported()

Only supported with binary data.

See Also:

InputStream.markSupported()

reset

public void reset()
           throws IOException

Only supported with binary data.

Throws:

IOException

See Also:

InputStream.reset()

close

public void close()
           throws IOException

Throws:

IOException

See Also:

Closeable.close()

skip

public long skip(long n,
                 boolean block)
          throws IOException

Deprecated. pls. use skip(long), the block parameter will be ignored

Skips the specified number of bytes/characters.

Throws:

IOException

See Also:

InputStream.skip(long), Reader.skip(long)

skip

public long skip(long n)
          throws IOException

Skips the specified number of bytes/characters.

Throws:

IOException

See Also:

InputStream.skip(long), Reader.skip(long)

finished

protected void finished()

When invoked, this method will call ReadHandler.onAllDataRead() on the current ReadHandler (if any). This method shouldn't be invoked by developers directly.

replayPayload

public void replayPayload(org.glassfish.grizzly.Buffer buffer)

isFinished

public boolean isFinished()

Returns:

true if all request data has been read, otherwise returns false.

isClosed

public boolean isClosed()

Returns:

true if this InputBuffer is closed, otherwise returns false.

notifyAvailable

public void notifyAvailable(org.glassfish.grizzly.ReadHandler handler)

Installs a ReadHandler that will be notified when any data becomes available to read without blocking.

Parameters:

handler - the ReadHandler to invoke.

Throws:

IllegalArgumentException - if handler is null.

IllegalStateException - if an attempt is made to register a handler before an existing registered handler has been invoked or if all request data has already been read.

notifyAvailable

public void notifyAvailable(org.glassfish.grizzly.ReadHandler handler,
                            int size)

Installs a ReadHandler that will be notified when the specified amount of data is available to be read without blocking.

Parameters:

handler - the ReadHandler to invoke.

size - the minimum number of bytes that must be available before the ReadHandler is notified.

Throws:

IllegalArgumentException - if handler is null, or if size is less or equal to zero.

IllegalStateException - if an attempt is made to register a handler before an existing registered handler has been invoked.

append

public boolean append(HttpContent httpContent)
               throws IOException

Appends the specified Buffer to the internal composite Buffer.

Parameters:

httpContent - the HttpContent to append

Returns:

true if ReadHandler callback was invoked, otherwise returns false.

Throws:

IOException - if an error occurs appending the Buffer

isAsyncEnabled

public boolean isAsyncEnabled()

Deprecated. will always return true

Returns:

if this buffer is being used to process asynchronous data.

setAsyncEnabled

public void setAsyncEnabled(boolean asyncEnabled)

Deprecated. InputBuffer always supports async mode

Sets the asynchronous processing state of this InputBuffer.

Parameters:

asyncEnabled - true if this InputBuffer is to be used to process asynchronous request data.

terminate

public void terminate()

Invoke ReadHandler.onError(Throwable) (assuming a ReadHandler is available) } passing a {#link CancellationException} if the current Connection is open, or a {#link EOFException} if the connection was unexpectedly closed.

Since:

2.0.1

initiateAsyncronousDataReceiving

public void initiateAsyncronousDataReceiving()

Initiates asynchronous data receiving. This is service method, usually users don't have to call it explicitly.

getThreadPool

protected Executor getThreadPool()

Returns:

Executor, which will be used for notifying user registered ReadHandler.

blockingRead

protected HttpContent blockingRead()
                            throws IOException

Read next chunk of data in this thread, block if needed.

Returns:

HttpContent

Throws:

IOException

updateInputContentBuffer

protected void updateInputContentBuffer(org.glassfish.grizzly.Buffer buffer)