Package org.apache.tomcat.util.net

Class NioEndpoint

java.lang.Object

org.apache.tomcat.util.net.AbstractEndpoint<S,U>

org.apache.tomcat.util.net.AbstractJsseEndpoint<NioChannel,java.nio.channels.SocketChannel>

org.apache.tomcat.util.net.NioEndpoint

public class NioEndpoint
extends AbstractJsseEndpoint<NioChannel,java.nio.channels.SocketChannel>

NIO tailored thread pool, providing the following services:

• Socket acceptor thread
• Socket poller thread
• Worker threads pool

TODO: Consider using the virtual machine's thread pool.

Author:

Mladen Turk, Remy Maucherat

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	NioEndpoint.NioSocketWrapper
class	NioEndpoint.Poller	Poller class.
static class	NioEndpoint.PollerEvent	PollerEvent, cacheable object for poller events to avoid GC
static class	NioEndpoint.SendfileData	SendfileData class.
protected class	NioEndpoint.SocketProcessor	This class is the equivalent of the Worker, but will simply use in an external Executor thread pool.

Nested classes/interfaces inherited from class org.apache.tomcat.util.net.AbstractEndpoint

AbstractEndpoint.BindState, AbstractEndpoint.Handler<S>

Field Summary

Fields

Modifier and Type	Field	Description
static int	OP_REGISTER

Fields inherited from class org.apache.tomcat.util.net.AbstractEndpoint

acceptor, acceptorThreadCount, acceptorThreadPriority, attributes, connections, internalExecutor, negotiableProtocols, paused, processorCache, running, sm, socketProperties, sslHostConfigs, threadPriority

Constructor Summary

Constructors

Constructor	Description
NioEndpoint()

Method Summary

Modifier and Type	Method	Description
void	bind()	Initialize the endpoint.
protected SocketProcessorBase<NioChannel>	createSocketProcessor(SocketWrapperBase<NioChannel> socketWrapper, SocketEvent event)
protected void	destroySocket(java.nio.channels.SocketChannel socket)	Close the socket.
protected void	doCloseServerSocket()	Actually close the server socket but don't perform any other clean-up.
boolean	getDeferAccept()	Is deferAccept supported?
int	getKeepAliveCount()	Number of keep-alive sockets.
protected Log	getLog()
protected Log	getLogCertificate()
protected SynchronizedStack<NioChannel>	getNioChannels()
protected NioEndpoint.Poller	getPoller()
NioEndpoint.Poller	getPoller0()	Deprecated. Will be removed in Tomcat 9.
int	getPollerThreadCount()	Deprecated. Will be removed in Tomcat 10.
int	getPollerThreadPriority()
long	getSelectorTimeout()
protected java.nio.channels.NetworkChannel	getServerSocket()
protected java.util.concurrent.CountDownLatch	getStopLatch()
boolean	getUseInheritedChannel()
protected void	initServerSocket()
protected java.nio.channels.SocketChannel	serverSocketAccept()
void	setPollerThreadCount(int pollerThreadCount)	Deprecated. Will be removed in Tomcat 10.
void	setPollerThreadPriority(int pollerThreadPriority)
void	setSelectorTimeout(long timeout)
protected boolean	setSocketOptions(java.nio.channels.SocketChannel socket)	Process the specified connection.
protected void	setStopLatch(java.util.concurrent.CountDownLatch stopLatch)
void	setUseInheritedChannel(boolean useInheritedChannel)
void	startInternal()	Start the NIO endpoint, creating acceptor, poller threads.
void	stopInternal()	Stop the endpoint.
void	unbind()	Deallocate NIO memory pools, and close server socket.

Methods inherited from class org.apache.tomcat.util.net.AbstractJsseEndpoint

createSSLContext, createSSLEngine, getLocalAddress, getSniParseLimit, getSslImplementation, getSslImplementationName, init, initialiseSsl, isAlpnSupported, setSniParseLimit, setSslImplementationName

Methods inherited from class org.apache.tomcat.util.net.AbstractEndpoint

addNegotiatedProtocol, addSslHostConfig, addSslHostConfig, awaitConnectionsClose, closeServerSocketGraceful, closeSocket, countDownConnection, countUpOrAwaitConnection, createExecutor, destroy, destroySsl, findSslHostConfigs, generateCertificateDebug, getAcceptCount, getAcceptorThreadCount, getAcceptorThreadPriority, getAddress, getAttribute, getBacklog, getBindOnInit, getBindState, getConnectionCount, getConnectionLinger, getConnections, getConnectionTimeout, getCurrentThreadCount, getCurrentThreadsBusy, getDaemon, getDefaultSSLHostConfigName, getDomain, getExecutor, getExecutorTerminationTimeoutMillis, getHandler, getKeepAliveTimeout, getLocalPort, getMaxConnections, getMaxHeaderCount, getMaxKeepAliveRequests, getMaxThreads, getMinSpareThreads, getName, getPort, getPortOffset, getPortWithOffset, getProperty, getSocketProperties, getSoLinger, getSoTimeout, getSSLHostConfig, getTcpNoDelay, getThreadPriority, getUseAsyncIO, getUseSendfile, hasNegotiableProtocols, initializeConnectionLatch, isPaused, isRunning, isSSLEnabled, logCertificate, pause, processSocket, releaseConnectionLatch, releaseSSLContext, reloadSslHostConfig, reloadSslHostConfigs, removeSslHostConfig, resume, setAcceptCount, setAcceptorThreadCount, setAcceptorThreadPriority, setAddress, setAttribute, setBacklog, setBindOnInit, setConnectionLinger, setConnectionTimeout, setDaemon, setDefaultSSLHostConfigName, setDomain, setExecutor, setExecutorTerminationTimeoutMillis, setHandler, setKeepAliveTimeout, setMaxConnections, setMaxHeaderCount, setMaxKeepAliveRequests, setMaxThreads, setMinSpareThreads, setName, setPort, setPortOffset, setProperty, setSoLinger, setSoTimeout, setSSLEnabled, setTcpNoDelay, setThreadPriority, setUseAsyncIO, setUseSendfile, shutdownExecutor, start, startAcceptorThread, stop, toTimeout, unlockAccept

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

OP_REGISTER

public static final int OP_REGISTER

See Also:

Constant Field Values

Constructor Detail

NioEndpoint

public NioEndpoint()

Method Detail

setUseInheritedChannel

public void setUseInheritedChannel(boolean useInheritedChannel)

getUseInheritedChannel

public boolean getUseInheritedChannel()

setPollerThreadPriority

public void setPollerThreadPriority(int pollerThreadPriority)

getPollerThreadPriority

public int getPollerThreadPriority()

setPollerThreadCount

@Deprecated
public void setPollerThreadCount(int pollerThreadCount)

Deprecated.

Will be removed in Tomcat 10.

NO-OP.

Parameters:

pollerThreadCount - Unused

getPollerThreadCount

@Deprecated
public int getPollerThreadCount()

Deprecated.

Will be removed in Tomcat 10.

Always returns 1.

Returns:

Always 1.

setSelectorTimeout

public void setSelectorTimeout(long timeout)

getSelectorTimeout

public long getSelectorTimeout()

getPoller0

@Deprecated
public NioEndpoint.Poller getPoller0()

Deprecated.

Will be removed in Tomcat 9.

Not used.

Returns:

The poller

getDeferAccept

public boolean getDeferAccept()

Is deferAccept supported?

Specified by:

getDeferAccept in class AbstractEndpoint<NioChannel,java.nio.channels.SocketChannel>

getKeepAliveCount

public int getKeepAliveCount()

Number of keep-alive sockets.

Returns:

The number of sockets currently in the keep-alive state waiting for the next request to be received on the socket

bind

public void bind()
          throws java.lang.Exception

Initialize the endpoint.

Specified by:

bind in class AbstractEndpoint<NioChannel,java.nio.channels.SocketChannel>

Throws:

java.lang.Exception

initServerSocket

protected void initServerSocket()
                         throws java.lang.Exception

Throws:

java.lang.Exception

startInternal

public void startInternal()
                   throws java.lang.Exception

Start the NIO endpoint, creating acceptor, poller threads.

Specified by:

startInternal in class AbstractEndpoint<NioChannel,java.nio.channels.SocketChannel>

Throws:

java.lang.Exception

stopInternal

public void stopInternal()

Stop the endpoint. This will cause all processing threads to stop.

Specified by:

stopInternal in class AbstractEndpoint<NioChannel,java.nio.channels.SocketChannel>

unbind

public void unbind()
            throws java.lang.Exception

Deallocate NIO memory pools, and close server socket.

Overrides:

unbind in class AbstractJsseEndpoint<NioChannel,java.nio.channels.SocketChannel>

Throws:

java.lang.Exception

doCloseServerSocket

protected void doCloseServerSocket()
                            throws java.io.IOException

Description copied from class: AbstractEndpoint

Actually close the server socket but don't perform any other clean-up.

Specified by:

doCloseServerSocket in class AbstractEndpoint<NioChannel,java.nio.channels.SocketChannel>

Throws:

java.io.IOException - If an error occurs closing the socket

getNioChannels

protected SynchronizedStack<NioChannel> getNioChannels()

getPoller

protected NioEndpoint.Poller getPoller()

getStopLatch

protected java.util.concurrent.CountDownLatch getStopLatch()

setStopLatch

protected void setStopLatch(java.util.concurrent.CountDownLatch stopLatch)

setSocketOptions

protected boolean setSocketOptions(java.nio.channels.SocketChannel socket)

Process the specified connection.

Specified by:

setSocketOptions in class AbstractEndpoint<NioChannel,java.nio.channels.SocketChannel>

Parameters:

socket - The socket channel

Returns:

true if the socket was correctly configured and processing may continue, false if the socket needs to be close immediately

destroySocket

protected void destroySocket(java.nio.channels.SocketChannel socket)

Description copied from class: AbstractEndpoint

Close the socket. This is used when the connector is not in a state which allows processing the socket, or if there was an error which prevented the allocation of the socket wrapper.

Specified by:

destroySocket in class AbstractEndpoint<NioChannel,java.nio.channels.SocketChannel>

Parameters:

socket - The newly accepted socket

getServerSocket

protected java.nio.channels.NetworkChannel getServerSocket()

Specified by:

getServerSocket in class AbstractJsseEndpoint<NioChannel,java.nio.channels.SocketChannel>

serverSocketAccept

protected java.nio.channels.SocketChannel serverSocketAccept()
                                                      throws java.lang.Exception

Specified by:

serverSocketAccept in class AbstractEndpoint<NioChannel,java.nio.channels.SocketChannel>

Throws:

java.lang.Exception

getLog

protected Log getLog()

Specified by:

getLog in class AbstractEndpoint<NioChannel,java.nio.channels.SocketChannel>

getLogCertificate

protected Log getLogCertificate()

Overrides:

getLogCertificate in class AbstractEndpoint<NioChannel,java.nio.channels.SocketChannel>

createSocketProcessor

protected SocketProcessorBase<NioChannel> createSocketProcessor(SocketWrapperBase<NioChannel> socketWrapper,
                                                                SocketEvent event)

Specified by:

createSocketProcessor in class AbstractEndpoint<NioChannel,java.nio.channels.SocketChannel>