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java.lang.Object org.acplt.oncrpc.XdrEncodingStream org.acplt.oncrpc.XdrUdpEncodingStream
public class XdrUdpEncodingStream
The XdrUdpDecodingStream
class provides the necessary
functionality to XdrDecodingStream
to send XDR packets over the
network using the datagram-oriented UDP/IP.
Field Summary | |
---|---|
private byte[] |
buffer
The buffer which will receive the encoded information, before it is sent via a datagram socket. |
private int |
bufferHighmark
Index of the last four byte word in the buffer. |
private int |
bufferIndex
The write pointer is an index into the buffer . |
private static byte[] |
paddingZeros
Some zeros, only needed for padding -- like in real life. |
private java.net.InetAddress |
receiverAddress
Receiver address of current buffer contents when flushed. |
private int |
receiverPort
The receiver's port. |
private java.net.DatagramSocket |
socket
The datagram socket to be used when sending this XDR stream's buffer contents. |
Constructor Summary | |
---|---|
XdrUdpEncodingStream(java.net.DatagramSocket datagramSocket,
int bufferSize)
Creates a new UDP-based encoding XDR stream, associated with the given datagram socket. |
Method Summary | |
---|---|
void |
beginEncoding(java.net.InetAddress receiverAddress,
int receiverPort)
Begins encoding a new XDR record. |
void |
close()
Closes this encoding XDR stream and releases any system resources associated with this stream. |
void |
endEncoding()
Flushes this encoding XDR stream and forces any buffered output bytes to be written out. |
void |
xdrEncodeInt(int value)
Encodes (aka "serializes") a "XDR int" value and writes it down a XDR stream. |
void |
xdrEncodeOpaque(byte[] value,
int offset,
int length)
Encodes (aka "serializes") a XDR opaque value, which is represented by a vector of byte values, and starts at offset with a
length of length . |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
private java.net.DatagramSocket socket
private java.net.InetAddress receiverAddress
private int receiverPort
private byte[] buffer
private int bufferIndex
buffer
.
private int bufferHighmark
private static final byte[] paddingZeros
Constructor Detail |
---|
public XdrUdpEncodingStream(java.net.DatagramSocket datagramSocket, int bufferSize)
datagramSocket
- Datagram-based socket to use to get rid of
encoded data.bufferSize
- Size of buffer to store encoded data before it
is sent as one datagram.Method Detail |
---|
public void beginEncoding(java.net.InetAddress receiverAddress, int receiverPort) throws OncRpcException, java.io.IOException
beginEncoding
in class XdrEncodingStream
receiverAddress
- Indicates the receiver of the XDR data. This can be
null
for XDR streams connected permanently to a
receiver (like in case of TCP/IP based XDR streams).receiverPort
- Port number of the receiver.
OncRpcException
- if an ONC/RPC error occurs.
java.io.IOException
- if an I/O error occurs.public void endEncoding() throws OncRpcException, java.io.IOException
endEncoding
is that
calling it is an indication that the current record is finished and any
bytes previously encoded should immediately be written to their intended
destination.
endEncoding
in class XdrEncodingStream
OncRpcException
- if an ONC/RPC error occurs.
java.io.IOException
- if an I/O error occurs.public void close() throws OncRpcException, java.io.IOException
close
is that it closes the encoding XDR stream. A closed XDR stream cannot
perform encoding operations and cannot be reopened.
close
in class XdrEncodingStream
OncRpcException
- if an ONC/RPC error occurs.
java.io.IOException
- if an I/O error occurs.public void xdrEncodeInt(int value) throws OncRpcException, java.io.IOException
xdrEncodeInt
in class XdrEncodingStream
value
- The int value to be encoded.
OncRpcException
- if an ONC/RPC error occurs.
java.io.IOException
- if an I/O error occurs.public void xdrEncodeOpaque(byte[] value, int offset, int length) throws OncRpcException, java.io.IOException
offset
with a
length of length
. Only the opaque value is encoded, but
no length indication is preceeding the opaque value, so the receiver
has to know how long the opaque value will be. The encoded data is
always padded to be a multiple of four. If the given length is not a
multiple of four, zero bytes will be used for padding.
xdrEncodeOpaque
in class XdrEncodingStream
value
- The opaque value to be encoded in the form of a series of
bytes.offset
- Start offset in the data.length
- the number of bytes to encode.
OncRpcException
- if an ONC/RPC error occurs.
java.io.IOException
- if an I/O error occurs.
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