- java.lang.Object
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- jdk.net.ExtendedSocketOptions
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public final class ExtendedSocketOptions extends Object
Defines extended socket options, beyond those defined inStandardSocketOptions. These options may be platform specific.- Since:
- 1.8
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Field Summary
Fields Modifier and Type Field Description static SocketOption<SocketFlow>SO_FLOW_SLAService level properties.static SocketOption<Integer>TCP_KEEPCOUNTKeep-Alive retransmission maximum limit.static SocketOption<Integer>TCP_KEEPIDLEKeep-Alive idle time.static SocketOption<Integer>TCP_KEEPINTERVALKeep-Alive retransmission interval time.static SocketOption<Boolean>TCP_QUICKACKDisable Delayed Acknowledgements.
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Field Detail
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SO_FLOW_SLA
public static final SocketOption<SocketFlow> SO_FLOW_SLA
Service level properties. When a security manager is installed, setting or getting this option requires aNetworkPermission("setOption.SO_FLOW_SLA")or"getOption.SO_FLOW_SLA"respectively.
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TCP_QUICKACK
public static final SocketOption<Boolean> TCP_QUICKACK
Disable Delayed Acknowledgements.This socket option can be used to reduce or disable delayed acknowledgments (ACKs). When
TCP_QUICKACKis enabled, ACKs are sent immediately, rather than delayed if needed in accordance to normal TCP operation. This option is not permanent, it only enables a switch to or fromTCP_QUICKACKmode. Subsequent operations of the TCP protocol will once again disable/enableTCP_QUICKACKmode depending on internal protocol processing and factors such as delayed ACK timeouts occurring and data transfer, therefore this option needs to be set withsetOptionafter each operation of TCP on a given socket.The value of this socket option is a
Booleanthat represents whether the option is enabled or disabled. The socket option is specific to stream-oriented sockets using the TCP/IP protocol. The exact semantics of this socket option are socket type and system dependent.- Since:
- 10
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TCP_KEEPIDLE
public static final SocketOption<Integer> TCP_KEEPIDLE
Keep-Alive idle time.The value of this socket option is an
Integerthat is the number of seconds of idle time before keep-alive initiates a probe. The socket option is specific to stream-oriented sockets using the TCP/IP protocol. The exact semantics of this socket option are system dependent.When the
SO_KEEPALIVEoption is enabled, TCP probes a connection that has been idle for some amount of time. The default value for this idle period is system dependent, but is typically 2 hours. TheTCP_KEEPIDLEoption can be used to affect this value for a given socket.- Since:
- 11
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TCP_KEEPINTERVAL
public static final SocketOption<Integer> TCP_KEEPINTERVAL
Keep-Alive retransmission interval time.The value of this socket option is an
Integerthat is the number of seconds to wait before retransmitting a keep-alive probe. The socket option is specific to stream-oriented sockets using the TCP/IP protocol. The exact semantics of this socket option are system dependent.When the
SO_KEEPALIVEoption is enabled, TCP probes a connection that has been idle for some amount of time. If the remote system does not respond to a keep-alive probe, TCP retransmits the probe after some amount of time. The default value for this retransmission interval is system dependent, but is typically 75 seconds. TheTCP_KEEPINTERVALoption can be used to affect this value for a given socket.- Since:
- 11
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TCP_KEEPCOUNT
public static final SocketOption<Integer> TCP_KEEPCOUNT
Keep-Alive retransmission maximum limit.The value of this socket option is an
Integerthat is the maximum number of keep-alive probes to be sent. The socket option is specific to stream-oriented sockets using the TCP/IP protocol. The exact semantics of this socket option are system dependent.When the
SO_KEEPALIVEoption is enabled, TCP probes a connection that has been idle for some amount of time. If the remote system does not respond to a keep-alive probe, TCP retransmits the probe a certain number of times before a connection is considered to be broken. The default value for this keep-alive probe retransmit limit is system dependent, but is typically 8. TheTCP_KEEPCOUNToption can be used to affect this value for a given socket.- Since:
- 11
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