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java.lang.Objectorg.apache.http.impl.io.SessionInputBufferImpl
public class SessionInputBufferImpl
Abstract base class for session input buffers that stream data from
an arbitrary InputStream. This class buffers input data in
an internal byte array for optimal input performance.
readLine(CharArrayBuffer) and readLine() methods of this
class treat a lone LF as valid line delimiters in addition to CR-LF required
by the HTTP specification.
| Constructor Summary | |
|---|---|
SessionInputBufferImpl(HttpTransportMetricsImpl metrics,
int bufferSize)
|
|
SessionInputBufferImpl(HttpTransportMetricsImpl metrics,
int bufferSize,
int minChunkLimit,
MessageConstraints constraints,
CharsetDecoder charDecoder)
Creates new instance of SessionInputBufferImpl. |
|
| Method Summary | |
|---|---|
int |
available()
Returns available space in the buffer. |
void |
bind(InputStream inputStream)
|
int |
capacity()
Returns total capacity of the buffer |
void |
clear()
|
int |
fillBuffer()
|
HttpTransportMetrics |
getMetrics()
Returns HttpTransportMetrics for this session buffer. |
boolean |
hasBufferedData()
|
boolean |
isBound()
|
boolean |
isDataAvailable(int timeout)
Blocks until some data becomes available in the session buffer or the given timeout period in milliseconds elapses. |
int |
length()
Return length data stored in the buffer |
int |
read()
Reads the next byte of data from this session buffer. |
int |
read(byte[] b)
Reads some number of bytes from the session buffer and stores them into the buffer array b. |
int |
read(byte[] b,
int off,
int len)
Reads up to len bytes of data from the session buffer into
an array of bytes. |
String |
readLine()
Reads a complete line of characters up to a line delimiter from this session buffer. |
int |
readLine(CharArrayBuffer charbuffer)
Reads a complete line of characters up to a line delimiter from this session buffer into the given line buffer. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public SessionInputBufferImpl(HttpTransportMetricsImpl metrics,
int bufferSize,
int minChunkLimit,
MessageConstraints constraints,
CharsetDecoder charDecoder)
metrics - HTTP transport metrics.bufferSize - buffer size. Must be a positive number.minChunkLimit - size limit below which data chunks should be buffered in memory
in order to minimize native method invocations on the underlying network socket.
The optimal value of this parameter can be platform specific and defines a trade-off
between performance of memory copy operations and that of native method invocation.
If negative default chunk limited will be used.constraints - Message constraints. If null
MessageConstraints.DEFAULT will be used.charDecoder - CharDecoder to be used for decoding HTTP protocol elements.
If null simple type cast will be used for byte to char conversion.
public SessionInputBufferImpl(HttpTransportMetricsImpl metrics,
int bufferSize)
| Method Detail |
|---|
public void bind(InputStream inputStream)
public boolean isBound()
public int capacity()
BufferInfo
capacity in interface BufferInfopublic int length()
BufferInfo
length in interface BufferInfopublic int available()
BufferInfo
available in interface BufferInfo
public int fillBuffer()
throws IOException
IOExceptionpublic boolean hasBufferedData()
public void clear()
public int read()
throws IOException
SessionInputBufferint 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.
read in interface SessionInputBuffer-1 if the end of the
stream is reached.
IOException - if an I/O error occurs.
public int read(byte[] b,
int off,
int len)
throws IOException
SessionInputBufferlen bytes of data from the session buffer into
an array of bytes. An attempt is made to read as many as
len bytes, but a smaller number may be read, possibly
zero. 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.
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.
read in interface SessionInputBufferb - 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.
-1 if there is no more data because the end of
the stream has been reached.
IOException - if an I/O error occurs.
public int read(byte[] b)
throws IOException
SessionInputBufferb. 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.
read in interface SessionInputBufferb - the buffer into which the data is read.
-1 is there is no more data because the end of
the stream has been reached.
IOException - if an I/O error occurs.
public int readLine(CharArrayBuffer charbuffer)
throws IOException
-1 is returned. This method blocks until input
data is available, end of file is detected, or an exception is thrown.
This method treats a lone LF as a valid line delimiters in addition to CR-LF required by the HTTP specification.
readLine in interface SessionInputBuffercharbuffer - the line buffer.
IOException - if an I/O error occurs.
public String readLine()
throws IOException
SessionInputBuffernull is returned. This method blocks until input data is
available, end of file is detected, or an exception is thrown.
The choice of a char encoding and line delimiter sequence is up to the specific implementations of this interface.
readLine in interface SessionInputBufferIOException - if an I/O error occurs.
public boolean isDataAvailable(int timeout)
throws IOException
SessionInputBuffer0 this method blocks indefinitely.
isDataAvailable in interface SessionInputBuffertimeout - in milliseconds.
true if some data is available in the session
buffer or false otherwise.
IOException - if an I/O error occurs.public HttpTransportMetrics getMetrics()
SessionInputBufferHttpTransportMetrics for this session buffer.
getMetrics in interface SessionInputBuffer
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