Top Description Fields Constructors Methods
io.undertow.io

public Class UndertowOutputStream

extends OutputStream
implements BufferWritableOutputStream
Class Inheritance
All Implemented Interfaces
io.undertow.io.BufferWritableOutputStream
Imports
java.io.IOException, .OutputStream, java.nio.ByteBuffer, java.nio.channels.FileChannel, io.undertow.UndertowMessages, io.undertow.server.HttpServerExchange, io.undertow.util.Headers, .Methods, org.xnio.Buffers, .IoUtils, io.undertow.connector.ByteBufferPool, .PooledByteBuffer, org.xnio.channels.Channels, .StreamSinkChannel

Buffering output stream that wraps a channel.

This stream delays channel creation, so if a response will fit in the buffer it is not necessary to set the content length header.

Author
Stuart Douglas

Field Summary

Modifier and TypeField and Description
private ByteBuffer
private StreamSinkChannel
private final long
private final HttpServerExchange
private static final int
private static final int
private static final int
private PooledByteBuffer
private int
private long

Constructor Summary

AccessConstructor and Description
public
UndertowOutputStream(HttpServerExchange
The exchange
exchange
)

Construct a new instance.

Method Summary

Modifier and TypeMethod and Description
private ByteBuffer
public void
close()

Overrides java.io.OutputStream.close.

Implements java.io.Closeable.close.

Closes this output stream and releases any system resources associated with this stream.

public void
flush()

Overrides java.io.OutputStream.flush.

Implements java.io.Flushable.flush.

Flushes this output stream and forces any buffered output bytes to be written out.

public long
private static boolean
public void
resetBuffer()

If the response has not yet been written to the client this method will clear the streams buffer, invalidating any content that has already been written.

public void
pack-priv void
updateWritten(final long len)

public void
write(final int
the byte.
b
)

Implements abstract java.io.OutputStream.write.

Writes the specified byte to this output stream.

public void
write(final byte[]
the data.
b
)

Overrides java.io.OutputStream.write.

Writes b.length bytes from the specified byte array to this output stream.

public void
write(final byte[]
the data.
b
,
final int
the start offset in the data.
off
,
final int
the number of bytes to write.
len
)

Overrides java.io.OutputStream.write.

Writes len bytes from the specified byte array starting at offset off to this output stream.

public void
public void
private void
writeBufferBlocking(final boolean writeFinal)

Inherited from java.io.OutputStream:
nullOutputStream

Field Detail

bufferback to summary
private ByteBuffer buffer
channelback to summary
private StreamSinkChannel channel
contentLengthback to summary
private final long contentLength
exchangeback to summary
private final HttpServerExchange exchange
FLAG_CLOSEDback to summary
private static final int FLAG_CLOSED
FLAG_WRITE_STARTEDback to summary
private static final int FLAG_WRITE_STARTED
MAX_BUFFERS_TO_ALLOCATEback to summary
private static final int MAX_BUFFERS_TO_ALLOCATE
pooledBufferback to summary
private PooledByteBuffer pooledBuffer
stateback to summary
private int state
writtenback to summary
private long written

Constructor Detail

UndertowOutputStreamback to summary
public UndertowOutputStream(HttpServerExchange exchange)

Construct a new instance. No write timeout is configured.

Parameters
exchange:HttpServerExchange

The exchange

Method Detail

bufferback to summary
private ByteBuffer buffer()
closeback to summary
public void close() throws IOException

Overrides java.io.OutputStream.close.

Implements java.io.Closeable.close.

Doc from java.io.OutputStream.close.

Closes this output stream and releases any system resources associated with this stream. The general contract of close is that it closes the output stream. A closed stream cannot perform output operations and cannot be reopened.

Exceptions
IOException:
if an I/O error occurs.
flushback to summary
public void flush() throws IOException

Overrides java.io.OutputStream.flush.

Implements java.io.Flushable.flush.

Doc from java.io.OutputStream.flush.

Flushes this output stream and forces any buffered output bytes to be written out. The general contract of flush is that calling it is an indication that, if any bytes previously written have been buffered by the implementation of the output stream, such bytes should immediately be written to their intended destination.

If the intended destination of this stream is an abstraction provided by the underlying operating system, for example a file, then flushing the stream guarantees only that bytes previously written to the stream are passed to the operating system for writing; it does not guarantee that they are actually written to a physical device such as a disk drive.

Exceptions
IOException:
if an I/O error occurs.
getBytesWrittenback to summary
public long getBytesWritten()
isHeadRequestWithContentLengthback to summary
private static boolean isHeadRequestWithContentLength(HttpServerExchange exchange)
resetBufferback to summary
public void resetBuffer()

If the response has not yet been written to the client this method will clear the streams buffer, invalidating any content that has already been written. If any content has already been sent to the client then this method will throw and IllegalStateException

Exceptions
IllegalStateException:
If the response has been committed
transferFromback to summary
public void transferFrom(FileChannel source) throws IOException

Implements io.undertow.io.BufferWritableOutputStream.transferFrom.

Annotations
@Override
updateWrittenback to summary
pack-priv void updateWritten(final long len) throws IOException
writeback to summary
public void write(final int b) throws IOException

Implements abstract java.io.OutputStream.write.

Doc from java.io.OutputStream.write.

Writes the specified byte to this output stream. The general contract for write is that one byte is written to the output stream. The byte to be written is the eight low-order bits of the argument b. The 24 high-order bits of b are ignored.

Parameters
b:int

the byte.

Exceptions
IOException:
if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.
writeback to summary
public void write(final byte[] b) throws IOException

Overrides java.io.OutputStream.write.

Doc from java.io.OutputStream.write.

Writes b.length bytes from the specified byte array to this output stream. The general contract for write(b) is that it should have exactly the same effect as the call write(b, 0, b.length).

Parameters
b:byte[]

the data.

Exceptions
IOException:
if an I/O error occurs.
writeback to summary
public void write(final byte[] b, final int off, final int len) throws IOException

Overrides java.io.OutputStream.write.

Doc from java.io.OutputStream.write.

Writes len bytes from the specified byte array starting at offset off to this output stream. The general contract for write(b, off, len) is that some of the bytes in the array b are written to the output stream in order; element b[off] is the first byte written and b[off+len-1] is the last byte written by this operation.

If b is null, a NullPointerException is thrown.

If off is negative, or len is negative, or off+len is greater than the length of the array b, then an IndexOutOfBoundsException is thrown.

Parameters
b:byte[]

the data.

off:int

the start offset in the data.

len:int

the number of bytes to write.

Exceptions
IOException:
if an I/O error occurs. In particular, an IOException is thrown if the output stream is closed.
writeback to summary
public void write(ByteBuffer[] buffers) throws IOException

Implements io.undertow.io.BufferWritableOutputStream.write.

Annotations
@Override
writeback to summary
public void write(ByteBuffer byteBuffer) throws IOException

Implements io.undertow.io.BufferWritableOutputStream.write.

Annotations
@Override
writeBufferBlockingback to summary
private void writeBufferBlocking(final boolean writeFinal) throws IOException