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com.tangosol.net
Class NonBlockingTcpDatagramSocket

java.lang.Object
java.net.DatagramSocket
com.tangosol.net.TcpDatagramSocket
com.tangosol.net.NonBlockingTcpDatagramSocket

public class NonBlockingTcpDatagramSocket

extends TcpDatagramSocket

TCP based non-blocking datagram socket implementation. In order to provide a non-blocking API this implementation may drop packets if the underlying TCP transfer buffers are full.

Author:

mf 2009.12.16

Nested Class Summary

static class

NonBlockingTcpDatagramSocket.Impl

Field Summary

static boolean

SPLIT Flag indicating if split sockets should be used for TcpDatagram sockets.

Fields inherited from class com.tangosol.net.TcpDatagramSocket

IO_EXCEPTIONS_LOG_LEVEL, m_impl

Constructor Summary

	NonBlockingTcpDatagramSocket()
	NonBlockingTcpDatagramSocket(int nPort)
	NonBlockingTcpDatagramSocket(int nPort, java.net.InetAddress addr)
protected	NonBlockingTcpDatagramSocket(NonBlockingTcpDatagramSocket.Impl impl)
	NonBlockingTcpDatagramSocket(java.net.SocketAddress addr)
	NonBlockingTcpDatagramSocket(SocketProvider provider)

Method Summary

Methods inherited from class com.tangosol.net.TcpDatagramSocket

bind, isBound, provider, receive, send, setAdvanceFrequency, setListenBacklog, setPacketMagic, setSocketOptions, toString

Methods inherited from class java.net.DatagramSocket

close, connect, connect, disconnect, getBroadcast, getChannel, getInetAddress, getLocalAddress, getLocalPort, getLocalSocketAddress, getPort, getReceiveBufferSize, getRemoteSocketAddress, getReuseAddress, getSendBufferSize, getSoTimeout, getTrafficClass, isClosed, isConnected, setBroadcast, setDatagramSocketImplFactory, setReceiveBufferSize, setReuseAddress, setSendBufferSize, setSoTimeout, setTrafficClass

Field Detail

SPLIT

public static final boolean SPLIT

Flag indicating if split sockets should be used for TcpDatagram sockets. While this should ideally never be needed, testing on Linux has shown that under heavy packet loads the socket can appear to stall and refuse to accept or emit data. Worse still while the socket is in this state the NIC is transmitting ~300,000 packets/second, even when the process is paused CTRL+Z'd. This setting is conceptually similar to the "tangosol.coherence.datagram.splitsocket" but only applies to TcpDatagram sockets. Additionally it does not require multiple listening ports, just multiple connections. As of 3.6.1 this value defaults to false. This became "safe" in 3.6.1 since this version began using multiple listening sockets, and avoids the case which would be likely to trigger the Linux stall issue.

Constructor Detail

NonBlockingTcpDatagramSocket

public NonBlockingTcpDatagramSocket()
                             throws java.net.SocketException

Throws:

java.net.SocketException

NonBlockingTcpDatagramSocket

public NonBlockingTcpDatagramSocket(java.net.SocketAddress addr)
                             throws java.net.SocketException

Throws:

java.net.SocketException

NonBlockingTcpDatagramSocket

public NonBlockingTcpDatagramSocket(int nPort)
                             throws java.net.SocketException

Throws:

java.net.SocketException

NonBlockingTcpDatagramSocket

public NonBlockingTcpDatagramSocket(int nPort,
                                    java.net.InetAddress addr)
                             throws java.net.SocketException

Throws:

java.net.SocketException

NonBlockingTcpDatagramSocket

public NonBlockingTcpDatagramSocket(SocketProvider provider)
                             throws java.net.SocketException

Throws:

java.net.SocketException

NonBlockingTcpDatagramSocket

protected NonBlockingTcpDatagramSocket(NonBlockingTcpDatagramSocket.Impl impl)

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