- *set-socket-impl-factory
- ->socket
- bind
- bound?
- close
- closed?
- connect
- connected?
- get-channel
- get-inet-address
- get-input-stream
- get-keep-alive?
- get-local-address
- get-local-port
- get-local-socket-address
- get-oob-inline?
- get-output-stream
- get-port
- get-receive-buffer-size
- get-remote-socket-address
- get-reuse-address?
- get-send-buffer-size
- get-so-linger
- get-so-timeout
- get-tcp-no-delay?
- get-traffic-class
- input-shutdown?
- output-shutdown?
- send-urgent-data
- set-keep-alive
- set-oob-inline
- set-performance-preferences
- set-receive-buffer-size
- set-reuse-address
- set-send-buffer-size
- set-so-linger
- set-so-timeout
- set-tcp-no-delay
- set-traffic-class
- shutdown-input
- shutdown-output
- to-string
jdk.net.Socket
This class implements client sockets (also called just "sockets"). A socket is an endpoint for communication between two machines.
The actual work of the socket is performed by an instance of the SocketImpl class. An application, by changing the socket factory that creates the socket implementation, can configure itself to create sockets appropriate to the local firewall.
This class implements client sockets (also called just "sockets"). A socket is an endpoint for communication between two machines. The actual work of the socket is performed by an instance of the SocketImpl class. An application, by changing the socket factory that creates the socket implementation, can configure itself to create sockets appropriate to the local firewall.
*set-socket-impl-factoryclj
(*set-socket-impl-factory fac)Sets the client socket implementation factory for the application. The factory can be specified only once.
When an application creates a new client socket, the socket implementation factory's createSocketImpl method is called to create the actual socket implementation.
Passing null to the method is a no-op unless the factory was already set. If there is a security manager, this method first calls the security manager's checkSetFactory method to ensure the operation is allowed. This could result in a SecurityException.
fac - the desired factory. - java.net.SocketImplFactory
throws: java.io.IOException - if an I/O error occurs when setting the socket factory.
Sets the client socket implementation factory for the application. The factory can be specified only once. When an application creates a new client socket, the socket implementation factory's createSocketImpl method is called to create the actual socket implementation. Passing null to the method is a no-op unless the factory was already set. If there is a security manager, this method first calls the security manager's checkSetFactory method to ensure the operation is allowed. This could result in a SecurityException. fac - the desired factory. - `java.net.SocketImplFactory` throws: java.io.IOException - if an I/O error occurs when setting the socket factory.
->socketclj
(->socket)(->socket proxy)(->socket host port)(->socket host port stream)(->socket host port local-addr local-port)Constructor.
Creates a socket and connects it to the specified remote host on the specified remote port. The Socket will also bind() to the local address and port supplied.
If the specified host is null it is the equivalent of specifying the address as InetAddress.getByName(null). In other words, it is equivalent to specifying an address of the loopback interface.
A local port number of zero will let the system pick up a free port in the bind operation.
If there is a security manager, its checkConnect method is called with the host address and port as its arguments. This could result in a SecurityException.
host - the name of the remote host, or null for the loopback address. - java.lang.String
port - the remote port - int
local-addr - the local address the socket is bound to, or null for the anyLocal address. - java.net.InetAddress
local-port - the local port the socket is bound to, or zero for a system selected free port. - int
throws: java.io.IOException - if an I/O error occurs when creating the socket.
Constructor. Creates a socket and connects it to the specified remote host on the specified remote port. The Socket will also bind() to the local address and port supplied. If the specified host is null it is the equivalent of specifying the address as InetAddress.getByName(null). In other words, it is equivalent to specifying an address of the loopback interface. A local port number of zero will let the system pick up a free port in the bind operation. If there is a security manager, its checkConnect method is called with the host address and port as its arguments. This could result in a SecurityException. host - the name of the remote host, or null for the loopback address. - `java.lang.String` port - the remote port - `int` local-addr - the local address the socket is bound to, or null for the anyLocal address. - `java.net.InetAddress` local-port - the local port the socket is bound to, or zero for a system selected free port. - `int` throws: java.io.IOException - if an I/O error occurs when creating the socket.
bindclj
(bind this bindpoint)Binds the socket to a local address.
If the address is null, then the system will pick up an ephemeral port and a valid local address to bind the socket.
bindpoint - the SocketAddress to bind to - java.net.SocketAddress
throws: java.io.IOException - if the bind operation fails, or if the socket is already bound.
Binds the socket to a local address. If the address is null, then the system will pick up an ephemeral port and a valid local address to bind the socket. bindpoint - the SocketAddress to bind to - `java.net.SocketAddress` throws: java.io.IOException - if the bind operation fails, or if the socket is already bound.
bound?clj
(bound? this)Returns the binding state of the socket.
Note: Closing a socket doesn't clear its binding state, which means this method will return true for a closed socket (see isClosed()) if it was successfuly bound prior to being closed.
returns: true if the socket was successfuly bound to an address - boolean
Returns the binding state of the socket. Note: Closing a socket doesn't clear its binding state, which means this method will return true for a closed socket (see isClosed()) if it was successfuly bound prior to being closed. returns: true if the socket was successfuly bound to an address - `boolean`
closeclj
(close this)Closes this socket.
Any thread currently blocked in an I/O operation upon this socket will throw a SocketException.
Once a socket has been closed, it is not available for further networking use (i.e. can't be reconnected or rebound). A new socket needs to be created.
Closing this socket will also close the socket's InputStream and OutputStream.
If this socket has an associated channel then the channel is closed as well.
throws: java.io.IOException - if an I/O error occurs when closing this socket.
Closes this socket. Any thread currently blocked in an I/O operation upon this socket will throw a SocketException. Once a socket has been closed, it is not available for further networking use (i.e. can't be reconnected or rebound). A new socket needs to be created. Closing this socket will also close the socket's InputStream and OutputStream. If this socket has an associated channel then the channel is closed as well. throws: java.io.IOException - if an I/O error occurs when closing this socket.
closed?clj
(closed? this)Returns the closed state of the socket.
returns: true if the socket has been closed - boolean
Returns the closed state of the socket. returns: true if the socket has been closed - `boolean`
connectclj
(connect this endpoint)(connect this endpoint timeout)Connects this socket to the server with a specified timeout value. A timeout of zero is interpreted as an infinite timeout. The connection will then block until established or an error occurs.
endpoint - the SocketAddress - java.net.SocketAddress
timeout - the timeout value to be used in milliseconds. - int
throws: java.io.IOException - if an error occurs during the connection
Connects this socket to the server with a specified timeout value. A timeout of zero is interpreted as an infinite timeout. The connection will then block until established or an error occurs. endpoint - the SocketAddress - `java.net.SocketAddress` timeout - the timeout value to be used in milliseconds. - `int` throws: java.io.IOException - if an error occurs during the connection
connected?clj
(connected? this)Returns the connection state of the socket.
Note: Closing a socket doesn't clear its connection state, which means this method will return true for a closed socket (see isClosed()) if it was successfuly connected prior to being closed.
returns: true if the socket was successfuly connected to a server - boolean
Returns the connection state of the socket. Note: Closing a socket doesn't clear its connection state, which means this method will return true for a closed socket (see isClosed()) if it was successfuly connected prior to being closed. returns: true if the socket was successfuly connected to a server - `boolean`
get-channelclj
(get-channel this)Returns the unique SocketChannel object associated with this socket, if any.
A socket will have a channel if, and only if, the channel itself was created via the SocketChannel.open or ServerSocketChannel.accept methods.
returns: the socket channel associated with this socket,
or null if this socket was not created
for a channel - java.nio.channels.SocketChannel
Returns the unique SocketChannel
object associated with this socket, if any.
A socket will have a channel if, and only if, the channel itself was
created via the SocketChannel.open or ServerSocketChannel.accept
methods.
returns: the socket channel associated with this socket,
or null if this socket was not created
for a channel - `java.nio.channels.SocketChannel`get-inet-addressclj
(get-inet-address this)Returns the address to which the socket is connected.
If the socket was connected prior to being closed, then this method will continue to return the connected address after the socket is closed.
returns: the remote IP address to which this socket is connected,
or null if the socket is not connected. - java.net.InetAddress
Returns the address to which the socket is connected.
If the socket was connected prior to being closed,
then this method will continue to return the connected address
after the socket is closed.
returns: the remote IP address to which this socket is connected,
or null if the socket is not connected. - `java.net.InetAddress`get-input-streamclj
(get-input-stream this)Returns an input stream for this socket.
If this socket has an associated channel then the resulting input stream delegates all of its operations to the channel. If the channel is in non-blocking mode then the input stream's read operations will throw an IllegalBlockingModeException.
Under abnormal conditions the underlying connection may be broken by the remote host or the network software (for example a connection reset in the case of TCP connections). When a broken connection is detected by the network software the following applies to the returned input stream :-
The network software may discard bytes that are buffered by the socket. Bytes that aren't discarded by the network software can be read using read.
If there are no bytes buffered on the socket, or all buffered bytes have been consumed by read, then all subsequent calls to read will throw an IOException.
If there are no bytes buffered on the socket, and the socket has not been closed using close, then available will return 0.
Closing the returned InputStream will close the associated socket.
returns: an input stream for reading bytes from this socket. - java.io.InputStream
throws: java.io.IOException - if an I/O error occurs when creating the input stream, the socket is closed, the socket is not connected, or the socket input has been shutdown using shutdownInput()
Returns an input stream for this socket. If this socket has an associated channel then the resulting input stream delegates all of its operations to the channel. If the channel is in non-blocking mode then the input stream's read operations will throw an IllegalBlockingModeException. Under abnormal conditions the underlying connection may be broken by the remote host or the network software (for example a connection reset in the case of TCP connections). When a broken connection is detected by the network software the following applies to the returned input stream :- The network software may discard bytes that are buffered by the socket. Bytes that aren't discarded by the network software can be read using read. If there are no bytes buffered on the socket, or all buffered bytes have been consumed by read, then all subsequent calls to read will throw an IOException. If there are no bytes buffered on the socket, and the socket has not been closed using close, then available will return 0. Closing the returned InputStream will close the associated socket. returns: an input stream for reading bytes from this socket. - `java.io.InputStream` throws: java.io.IOException - if an I/O error occurs when creating the input stream, the socket is closed, the socket is not connected, or the socket input has been shutdown using shutdownInput()
get-keep-alive?clj
(get-keep-alive? this)Tests if SO_KEEPALIVE is enabled.
returns: a boolean indicating whether or not
SO_KEEPALIVE is enabled. - boolean
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Tests if SO_KEEPALIVE is enabled.
returns: a boolean indicating whether or not
SO_KEEPALIVE is enabled. - `boolean`
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.get-local-addressclj
(get-local-address this)Gets the local address to which the socket is bound.
If there is a security manager set, its checkConnect method is called with the local address and -1 as its arguments to see if the operation is allowed. If the operation is not allowed, the loopback address is returned.
returns: the local address to which the socket is bound,
the loopback address if denied by the security manager, or
the wildcard address if the socket is closed or not bound yet. - java.net.InetAddress
Gets the local address to which the socket is bound.
If there is a security manager set, its checkConnect method is
called with the local address and -1 as its arguments to see
if the operation is allowed. If the operation is not allowed,
the loopback address is returned.
returns: the local address to which the socket is bound,
the loopback address if denied by the security manager, or
the wildcard address if the socket is closed or not bound yet. - `java.net.InetAddress`get-local-portclj
(get-local-port this)Returns the local port number to which this socket is bound.
If the socket was bound prior to being closed, then this method will continue to return the local port number after the socket is closed.
returns: the local port number to which this socket is bound or -1
if the socket is not bound yet. - int
Returns the local port number to which this socket is bound.
If the socket was bound prior to being closed,
then this method will continue to return the local port number
after the socket is closed.
returns: the local port number to which this socket is bound or -1
if the socket is not bound yet. - `int`get-local-socket-addressclj
(get-local-socket-address this)Returns the address of the endpoint this socket is bound to.
If a socket bound to an endpoint represented by an InetSocketAddress is closed, then this method will continue to return an InetSocketAddress after the socket is closed. In that case the returned InetSocketAddress's address is the wildcard address and its port is the local port that it was bound to.
If there is a security manager set, its checkConnect method is called with the local address and -1 as its arguments to see if the operation is allowed. If the operation is not allowed, a SocketAddress representing the loopback address and the local port to which this socket is bound is returned.
returns: a SocketAddress representing the local endpoint of
this socket, or a SocketAddress representing the
loopback address if denied by the security manager, or
null if the socket is not bound yet. - java.net.SocketAddress
Returns the address of the endpoint this socket is bound to.
If a socket bound to an endpoint represented by an
InetSocketAddress is closed,
then this method will continue to return an InetSocketAddress
after the socket is closed. In that case the returned
InetSocketAddress's address is the
wildcard address
and its port is the local port that it was bound to.
If there is a security manager set, its checkConnect method is
called with the local address and -1 as its arguments to see
if the operation is allowed. If the operation is not allowed,
a SocketAddress representing the
loopback address and the local
port to which this socket is bound is returned.
returns: a SocketAddress representing the local endpoint of
this socket, or a SocketAddress representing the
loopback address if denied by the security manager, or
null if the socket is not bound yet. - `java.net.SocketAddress`get-oob-inline?clj
(get-oob-inline? this)Tests if SO_OOBINLINE is enabled.
returns: a boolean indicating whether or not
SO_OOBINLINEis enabled. - boolean
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Tests if SO_OOBINLINE is enabled.
returns: a boolean indicating whether or not
SO_OOBINLINEis enabled. - `boolean`
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.get-output-streamclj
(get-output-stream this)Returns an output stream for this socket.
If this socket has an associated channel then the resulting output stream delegates all of its operations to the channel. If the channel is in non-blocking mode then the output stream's write operations will throw an IllegalBlockingModeException.
Closing the returned OutputStream will close the associated socket.
returns: an output stream for writing bytes to this socket. - java.io.OutputStream
throws: java.io.IOException - if an I/O error occurs when creating the output stream or if the socket is not connected.
Returns an output stream for this socket. If this socket has an associated channel then the resulting output stream delegates all of its operations to the channel. If the channel is in non-blocking mode then the output stream's write operations will throw an IllegalBlockingModeException. Closing the returned OutputStream will close the associated socket. returns: an output stream for writing bytes to this socket. - `java.io.OutputStream` throws: java.io.IOException - if an I/O error occurs when creating the output stream or if the socket is not connected.
get-portclj
(get-port this)Returns the remote port number to which this socket is connected.
If the socket was connected prior to being closed, then this method will continue to return the connected port number after the socket is closed.
returns: the remote port number to which this socket is connected, or
0 if the socket is not connected yet. - int
Returns the remote port number to which this socket is connected.
If the socket was connected prior to being closed,
then this method will continue to return the connected port number
after the socket is closed.
returns: the remote port number to which this socket is connected, or
0 if the socket is not connected yet. - `int`get-receive-buffer-sizeclj
(get-receive-buffer-size this)Gets the value of the SO_RCVBUF option for this Socket, that is the buffer size used by the platform for input on this Socket.
returns: the value of the SO_RCVBUF
option for this Socket. - int
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Gets the value of the SO_RCVBUF option
for this Socket, that is the buffer size used by the platform
for input on this Socket.
returns: the value of the SO_RCVBUF
option for this Socket. - `int`
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.get-remote-socket-addressclj
(get-remote-socket-address this)Returns the address of the endpoint this socket is connected to, or null if it is unconnected.
If the socket was connected prior to being closed, then this method will continue to return the connected address after the socket is closed.
returns: a SocketAddress representing the remote endpoint of this
socket, or null if it is not connected yet. - java.net.SocketAddress
Returns the address of the endpoint this socket is connected to, or
null if it is unconnected.
If the socket was connected prior to being closed,
then this method will continue to return the connected address
after the socket is closed.
returns: a SocketAddress representing the remote endpoint of this
socket, or null if it is not connected yet. - `java.net.SocketAddress`get-reuse-address?clj
(get-reuse-address? this)Tests if SO_REUSEADDR is enabled.
returns: a boolean indicating whether or not
SO_REUSEADDR is enabled. - boolean
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Tests if SO_REUSEADDR is enabled.
returns: a boolean indicating whether or not
SO_REUSEADDR is enabled. - `boolean`
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.get-send-buffer-sizeclj
(get-send-buffer-size this)Get value of the SO_SNDBUF option for this Socket, that is the buffer size used by the platform for output on this Socket.
returns: the value of the SO_SNDBUF
option for this Socket. - int
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Get value of the SO_SNDBUF option
for this Socket, that is the buffer size used by the platform
for output on this Socket.
returns: the value of the SO_SNDBUF
option for this Socket. - `int`
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.get-so-lingerclj
(get-so-linger this)Returns setting for SO_LINGER. -1 returns implies that the option is disabled.
The setting only affects socket close.
returns: the setting for SO_LINGER. - int
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Returns setting for SO_LINGER. -1 returns implies that the option is disabled. The setting only affects socket close. returns: the setting for SO_LINGER. - `int` throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
get-so-timeoutclj
(get-so-timeout this)Returns setting for SO_TIMEOUT. 0 returns implies that the option is disabled (i.e., timeout of infinity).
returns: the setting for SO_TIMEOUT - int
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Returns setting for SO_TIMEOUT. 0 returns implies that the option is disabled (i.e., timeout of infinity). returns: the setting for SO_TIMEOUT - `int` throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
get-tcp-no-delay?clj
(get-tcp-no-delay? this)Tests if TCP_NODELAY is enabled.
returns: a boolean indicating whether or not
TCP_NODELAY is enabled. - boolean
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Tests if TCP_NODELAY is enabled.
returns: a boolean indicating whether or not
TCP_NODELAY is enabled. - `boolean`
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.get-traffic-classclj
(get-traffic-class this)Gets traffic class or type-of-service in the IP header for packets sent from this Socket
As the underlying network implementation may ignore the traffic class or type-of-service set using setTrafficClass(int) this method may return a different value than was previously set using the setTrafficClass(int) method on this Socket.
returns: the traffic class or type-of-service already set - int
throws: java.net.SocketException - if there is an error obtaining the traffic class or type-of-service value.
Gets traffic class or type-of-service in the IP header for packets sent from this Socket As the underlying network implementation may ignore the traffic class or type-of-service set using setTrafficClass(int) this method may return a different value than was previously set using the setTrafficClass(int) method on this Socket. returns: the traffic class or type-of-service already set - `int` throws: java.net.SocketException - if there is an error obtaining the traffic class or type-of-service value.
input-shutdown?clj
(input-shutdown? this)Returns whether the read-half of the socket connection is closed.
returns: true if the input of the socket has been shutdown - boolean
Returns whether the read-half of the socket connection is closed. returns: true if the input of the socket has been shutdown - `boolean`
output-shutdown?clj
(output-shutdown? this)Returns whether the write-half of the socket connection is closed.
returns: true if the output of the socket has been shutdown - boolean
Returns whether the write-half of the socket connection is closed. returns: true if the output of the socket has been shutdown - `boolean`
send-urgent-dataclj
(send-urgent-data this data)Send one byte of urgent data on the socket. The byte to be sent is the lowest eight bits of the data parameter. The urgent byte is sent after any preceding writes to the socket OutputStream and before any future writes to the OutputStream.
data - The byte of data to send - int
throws: java.io.IOException - if there is an error sending the data.
Send one byte of urgent data on the socket. The byte to be sent is the lowest eight bits of the data parameter. The urgent byte is sent after any preceding writes to the socket OutputStream and before any future writes to the OutputStream. data - The byte of data to send - `int` throws: java.io.IOException - if there is an error sending the data.
set-keep-aliveclj
(set-keep-alive this on)Enable/disable SO_KEEPALIVE.
on - whether or not to have socket keep alive turned on. - boolean
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Enable/disable SO_KEEPALIVE. on - whether or not to have socket keep alive turned on. - `boolean` throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
set-oob-inlineclj
(set-oob-inline this on)Enable/disable SO_OOBINLINE (receipt of TCP urgent data)
By default, this option is disabled and TCP urgent data received on a socket is silently discarded. If the user wishes to receive urgent data, then this option must be enabled. When enabled, urgent data is received inline with normal data.
Note, only limited support is provided for handling incoming urgent data. In particular, no notification of incoming urgent data is provided and there is no capability to distinguish between normal data and urgent data unless provided by a higher level protocol.
on - true to enable SO_OOBINLINE, false to disable. - boolean
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Enable/disable SO_OOBINLINE (receipt of TCP urgent data) By default, this option is disabled and TCP urgent data received on a socket is silently discarded. If the user wishes to receive urgent data, then this option must be enabled. When enabled, urgent data is received inline with normal data. Note, only limited support is provided for handling incoming urgent data. In particular, no notification of incoming urgent data is provided and there is no capability to distinguish between normal data and urgent data unless provided by a higher level protocol. on - true to enable SO_OOBINLINE, false to disable. - `boolean` throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
set-performance-preferencesclj
(set-performance-preferences this connection-time latency bandwidth)Sets performance preferences for this socket.
Sockets use the TCP/IP protocol by default. Some implementations may offer alternative protocols which have different performance characteristics than TCP/IP. This method allows the application to express its own preferences as to how these tradeoffs should be made when the implementation chooses from the available protocols.
Performance preferences are described by three integers whose values indicate the relative importance of short connection time, low latency, and high bandwidth. The absolute values of the integers are irrelevant; in order to choose a protocol the values are simply compared, with larger values indicating stronger preferences. Negative values represent a lower priority than positive values. If the application prefers short connection time over both low latency and high bandwidth, for example, then it could invoke this method with the values (1, 0, 0). If the application prefers high bandwidth above low latency, and low latency above short connection time, then it could invoke this method with the values (0, 1, 2).
Invoking this method after this socket has been connected will have no effect.
connection-time - An int expressing the relative importance of a short connection time - int
latency - An int expressing the relative importance of low latency - int
bandwidth - An int expressing the relative importance of high bandwidth - int
Sets performance preferences for this socket. Sockets use the TCP/IP protocol by default. Some implementations may offer alternative protocols which have different performance characteristics than TCP/IP. This method allows the application to express its own preferences as to how these tradeoffs should be made when the implementation chooses from the available protocols. Performance preferences are described by three integers whose values indicate the relative importance of short connection time, low latency, and high bandwidth. The absolute values of the integers are irrelevant; in order to choose a protocol the values are simply compared, with larger values indicating stronger preferences. Negative values represent a lower priority than positive values. If the application prefers short connection time over both low latency and high bandwidth, for example, then it could invoke this method with the values (1, 0, 0). If the application prefers high bandwidth above low latency, and low latency above short connection time, then it could invoke this method with the values (0, 1, 2). Invoking this method after this socket has been connected will have no effect. connection-time - An int expressing the relative importance of a short connection time - `int` latency - An int expressing the relative importance of low latency - `int` bandwidth - An int expressing the relative importance of high bandwidth - `int`
set-receive-buffer-sizeclj
(set-receive-buffer-size this size)Sets the SO_RCVBUF option to the specified value for this Socket. The SO_RCVBUF option is used by the platform's networking code as a hint for the size to set the underlying network I/O buffers.
Increasing the receive buffer size can increase the performance of network I/O for high-volume connection, while decreasing it can help reduce the backlog of incoming data.
Because SO_RCVBUF is a hint, applications that want to verify what size the buffers were set to should call getReceiveBufferSize().
The value of SO_RCVBUF is also used to set the TCP receive window that is advertized to the remote peer. Generally, the window size can be modified at any time when a socket is connected. However, if a receive window larger than 64K is required then this must be requested before the socket is connected to the remote peer. There are two cases to be aware of:
For sockets accepted from a ServerSocket, this must be done by calling ServerSocket.setReceiveBufferSize(int) before the ServerSocket is bound to a local address. For client sockets, setReceiveBufferSize() must be called before connecting the socket to its remote peer.
size - the size to which to set the receive buffer size. This value must be greater than 0. - int
throws: java.lang.IllegalArgumentException - if the value is 0 or is negative.
Sets the SO_RCVBUF option to the specified value for this Socket. The SO_RCVBUF option is used by the platform's networking code as a hint for the size to set the underlying network I/O buffers. Increasing the receive buffer size can increase the performance of network I/O for high-volume connection, while decreasing it can help reduce the backlog of incoming data. Because SO_RCVBUF is a hint, applications that want to verify what size the buffers were set to should call getReceiveBufferSize(). The value of SO_RCVBUF is also used to set the TCP receive window that is advertized to the remote peer. Generally, the window size can be modified at any time when a socket is connected. However, if a receive window larger than 64K is required then this must be requested before the socket is connected to the remote peer. There are two cases to be aware of: For sockets accepted from a ServerSocket, this must be done by calling ServerSocket.setReceiveBufferSize(int) before the ServerSocket is bound to a local address. For client sockets, setReceiveBufferSize() must be called before connecting the socket to its remote peer. size - the size to which to set the receive buffer size. This value must be greater than 0. - `int` throws: java.lang.IllegalArgumentException - if the value is 0 or is negative.
set-reuse-addressclj
(set-reuse-address this on)Enable/disable the SO_REUSEADDR socket option.
When a TCP connection is closed the connection may remain in a timeout state for a period of time after the connection is closed (typically known as the TIME_WAIT state or 2MSL wait state). For applications using a well known socket address or port it may not be possible to bind a socket to the required SocketAddress if there is a connection in the timeout state involving the socket address or port.
Enabling SO_REUSEADDR prior to binding the socket using bind(SocketAddress) allows the socket to be bound even though a previous connection is in a timeout state.
When a Socket is created the initial setting of SO_REUSEADDR is disabled.
The behaviour when SO_REUSEADDR is enabled or disabled after a socket is bound (See isBound()) is not defined.
on - whether to enable or disable the socket option - boolean
throws: java.net.SocketException - if an error occurs enabling or disabling the SO_REUSEADDR socket option, or the socket is closed.
Enable/disable the SO_REUSEADDR socket option. When a TCP connection is closed the connection may remain in a timeout state for a period of time after the connection is closed (typically known as the TIME_WAIT state or 2MSL wait state). For applications using a well known socket address or port it may not be possible to bind a socket to the required SocketAddress if there is a connection in the timeout state involving the socket address or port. Enabling SO_REUSEADDR prior to binding the socket using bind(SocketAddress) allows the socket to be bound even though a previous connection is in a timeout state. When a Socket is created the initial setting of SO_REUSEADDR is disabled. The behaviour when SO_REUSEADDR is enabled or disabled after a socket is bound (See isBound()) is not defined. on - whether to enable or disable the socket option - `boolean` throws: java.net.SocketException - if an error occurs enabling or disabling the SO_REUSEADDR socket option, or the socket is closed.
set-send-buffer-sizeclj
(set-send-buffer-size this size)Sets the SO_SNDBUF option to the specified value for this Socket. The SO_SNDBUF option is used by the platform's networking code as a hint for the size to set the underlying network I/O buffers.
Because SO_SNDBUF is a hint, applications that want to verify what size the buffers were set to should call getSendBufferSize().
size - the size to which to set the send buffer size. This value must be greater than 0. - int
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Sets the SO_SNDBUF option to the specified value for this Socket. The SO_SNDBUF option is used by the platform's networking code as a hint for the size to set the underlying network I/O buffers. Because SO_SNDBUF is a hint, applications that want to verify what size the buffers were set to should call getSendBufferSize(). size - the size to which to set the send buffer size. This value must be greater than 0. - `int` throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
set-so-lingerclj
(set-so-linger this on linger)Enable/disable SO_LINGER with the specified linger time in seconds. The maximum timeout value is platform specific.
The setting only affects socket close.
on - whether or not to linger on. - boolean
linger - how long to linger for, if on is true. - int
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Enable/disable SO_LINGER with the specified linger time in seconds. The maximum timeout value is platform specific. The setting only affects socket close. on - whether or not to linger on. - `boolean` linger - how long to linger for, if on is true. - `int` throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
set-so-timeoutclj
(set-so-timeout this timeout)Enable/disable SO_TIMEOUT with the specified timeout, in milliseconds. With this option set to a non-zero timeout, a read() call on the InputStream associated with this Socket will block for only this amount of time. If the timeout expires, a java.net.SocketTimeoutException is raised, though the Socket is still valid. The option must be enabled prior to entering the blocking operation to have effect. The timeout must be > 0. A timeout of zero is interpreted as an infinite timeout.
timeout - the specified timeout, in milliseconds. - int
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Enable/disable SO_TIMEOUT with the specified timeout, in milliseconds. With this option set to a non-zero timeout, a read() call on the InputStream associated with this Socket will block for only this amount of time. If the timeout expires, a java.net.SocketTimeoutException is raised, though the Socket is still valid. The option must be enabled prior to entering the blocking operation to have effect. The timeout must be > 0. A timeout of zero is interpreted as an infinite timeout. timeout - the specified timeout, in milliseconds. - `int` throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
set-tcp-no-delayclj
(set-tcp-no-delay this on)Enable/disable TCP_NODELAY (disable/enable Nagle's algorithm).
on - true to enable TCP_NODELAY, false to disable. - boolean
throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
Enable/disable TCP_NODELAY (disable/enable Nagle's algorithm). on - true to enable TCP_NODELAY, false to disable. - `boolean` throws: java.net.SocketException - if there is an error in the underlying protocol, such as a TCP error.
set-traffic-classclj
(set-traffic-class this tc)Sets traffic class or type-of-service octet in the IP header for packets sent from this Socket. As the underlying network implementation may ignore this value applications should consider it a hint.
The tc must be in the range 0 <= tc <= 255 or an IllegalArgumentException will be thrown. Notes: For Internet Protocol v4 the value consists of an integer, the least significant 8 bits of which represent the value of the TOS octet in IP packets sent by the socket. RFC 1349 defines the TOS values as follows:
IPTOS_LOWCOST (0x02) IPTOS_RELIABILITY (0x04) IPTOS_THROUGHPUT (0x08) IPTOS_LOWDELAY (0x10)
The last low order bit is always ignored as this corresponds to the MBZ (must be zero) bit.
Setting bits in the precedence field may result in a SocketException indicating that the operation is not permitted.
As RFC 1122 section 4.2.4.2 indicates, a compliant TCP implementation should, but is not required to, let application change the TOS field during the lifetime of a connection. So whether the type-of-service field can be changed after the TCP connection has been established depends on the implementation in the underlying platform. Applications should not assume that they can change the TOS field after the connection.
For Internet Protocol v6 tc is the value that would be placed into the sin6_flowinfo field of the IP header.
tc - an int value for the bitset. - int
throws: java.net.SocketException - if there is an error setting the traffic class or type-of-service
Sets traffic class or type-of-service octet in the IP header for packets sent from this Socket. As the underlying network implementation may ignore this value applications should consider it a hint. The tc must be in the range 0 <= tc <= 255 or an IllegalArgumentException will be thrown. Notes: For Internet Protocol v4 the value consists of an integer, the least significant 8 bits of which represent the value of the TOS octet in IP packets sent by the socket. RFC 1349 defines the TOS values as follows: IPTOS_LOWCOST (0x02) IPTOS_RELIABILITY (0x04) IPTOS_THROUGHPUT (0x08) IPTOS_LOWDELAY (0x10) The last low order bit is always ignored as this corresponds to the MBZ (must be zero) bit. Setting bits in the precedence field may result in a SocketException indicating that the operation is not permitted. As RFC 1122 section 4.2.4.2 indicates, a compliant TCP implementation should, but is not required to, let application change the TOS field during the lifetime of a connection. So whether the type-of-service field can be changed after the TCP connection has been established depends on the implementation in the underlying platform. Applications should not assume that they can change the TOS field after the connection. For Internet Protocol v6 tc is the value that would be placed into the sin6_flowinfo field of the IP header. tc - an int value for the bitset. - `int` throws: java.net.SocketException - if there is an error setting the traffic class or type-of-service
shutdown-inputclj
(shutdown-input this)Places the input stream for this socket at "end of stream". Any data sent to the input stream side of the socket is acknowledged and then silently discarded.
If you read from a socket input stream after invoking this method on the socket, the stream's available method will return 0, and its read methods will return -1 (end of stream).
throws: java.io.IOException - if an I/O error occurs when shutting down this socket.
Places the input stream for this socket at "end of stream". Any data sent to the input stream side of the socket is acknowledged and then silently discarded. If you read from a socket input stream after invoking this method on the socket, the stream's available method will return 0, and its read methods will return -1 (end of stream). throws: java.io.IOException - if an I/O error occurs when shutting down this socket.
shutdown-outputclj
(shutdown-output this)Disables the output stream for this socket. For a TCP socket, any previously written data will be sent followed by TCP's normal connection termination sequence.
If you write to a socket output stream after invoking shutdownOutput() on the socket, the stream will throw an IOException.
throws: java.io.IOException - if an I/O error occurs when shutting down this socket.
Disables the output stream for this socket. For a TCP socket, any previously written data will be sent followed by TCP's normal connection termination sequence. If you write to a socket output stream after invoking shutdownOutput() on the socket, the stream will throw an IOException. throws: java.io.IOException - if an I/O error occurs when shutting down this socket.
to-stringclj
(to-string this)Converts this socket to a String.
returns: a string representation of this socket. - java.lang.String
Converts this socket to a String. returns: a string representation of this socket. - `java.lang.String`
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