org.apache.tomcat.util.net

Class AprEndpoint

java.lang.Object

org.apache.tomcat.util.net.AbstractEndpoint<Long,Long>

org.apache.tomcat.util.net.AprEndpoint

All Implemented Interfaces:

SSLContext.SNICallBack

public class AprEndpoint
extends AbstractEndpoint<Long,Long>
implements SSLContext.SNICallBack

APR tailored thread pool, providing the following services:

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

When switching to Java 5, there's an opportunity to use the virtual machine's thread pool.

Author:

Mladen Turk, Remy Maucherat

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AprEndpoint.AprSocketWrapper
class	AprEndpoint.Poller
class	AprEndpoint.Sendfile
static class	AprEndpoint.SendfileData SendfileData class.
static class	AprEndpoint.SocketInfo
static class	AprEndpoint.SocketList
protected class	AprEndpoint.SocketProcessor This class is the equivalent of the Worker, but will simply use in an external Executor thread pool.
static class	AprEndpoint.SocketTimeouts
protected class	AprEndpoint.SocketWithOptionsProcessor 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 and Description
protected boolean	deferAccept Defer accept.
protected AprEndpoint.Poller	poller The socket poller.
protected int	pollTime Poll interval, in microseconds.
protected long	rootPool Root APR memory pool.
protected AprEndpoint.Sendfile	sendfile The static file sender.
protected int	sendfileSize Size of the sendfile (= concurrent files which can be served).
protected long	serverSock Server socket "pointer".
protected long	serverSockPool APR memory pool for the server socket.
protected long	sslContext SSL context.

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 and Description
AprEndpoint()

Method Summary

Modifier and Type	Method and Description
protected long	allocatePoller(int size, long pool, int timeout) Allocate a new poller of the specified size.
void	bind() Initialize the endpoint.
protected SocketProcessorBase<Long>	createSocketProcessor(SocketWrapperBase<Long> socketWrapper, SocketEvent event)
protected void	createSSLContext(SSLHostConfig sslHostConfig) Create the SSLContextfor the the given SSLHostConfig.
protected void	destroySocket(Long socket) Close the socket.
protected void	doCloseServerSocket() Actually close the server socket but don't perform any other clean-up.
boolean	getDeferAccept()
boolean	getIpv6v6only()
int	getKeepAliveCount() Obtain the number of kept alive sockets.
InetSocketAddress	getLocalAddress() Obtain the network address the server socket is bound to.
protected Log	getLog()
AprEndpoint.Poller	getPoller()
int	getPollTime()
AprEndpoint.Sendfile	getSendfile()
int	getSendfileCount() Obtain the number of sendfile sockets.
int	getSendfileSize()
long	getSslContext(String sniHostName) This callback is made during the TLS handshake when the client uses the SNI extension to request a specific TLS host.
boolean	isAlpnSupported() Identifies if the endpoint supports ALPN.
protected boolean	processSocket(long socket, SocketEvent event) Process the given socket.
protected Long	serverSocketAccept()
void	setDeferAccept(boolean deferAccept)
void	setIpv6v6only(boolean ipv6v6only)
void	setMaxConnections(int maxConnections) This endpoint does not support -1 for unlimited connections, nor does it support setting this attribute while the endpoint is running.
void	setPollTime(int pollTime)
void	setSendfileSize(int sendfileSize)
protected boolean	setSocketOptions(Long socket) Process given socket.
protected boolean	setSocketOptions(SocketWrapperBase<Long> socketWrapper) Process the specified connection.
void	setUseSendfile(boolean useSendfile)
void	startInternal() Start the APR endpoint, creating acceptor, poller and sendfile threads.
void	stopInternal() Stop the endpoint.
void	unbind() Deallocate APR memory pools, and close server socket.

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

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

Methods inherited from class java.lang.Object

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

Field Detail

rootPool

protected long rootPool

Root APR memory pool.

serverSock

protected volatile long serverSock

Server socket "pointer".

serverSockPool

protected long serverSockPool

APR memory pool for the server socket.

sslContext

protected long sslContext

SSL context.

deferAccept

protected boolean deferAccept

Defer accept.

sendfileSize

protected int sendfileSize

Size of the sendfile (= concurrent files which can be served).

pollTime

protected int pollTime

Poll interval, in microseconds. The smaller the value, the more CPU the poller will use, but the more responsive to activity it will be.

poller

protected AprEndpoint.Poller poller

The socket poller.

sendfile

protected AprEndpoint.Sendfile sendfile

The static file sender.

Constructor Detail

AprEndpoint

public AprEndpoint()

Method Detail

setDeferAccept

public void setDeferAccept(boolean deferAccept)

getDeferAccept

public boolean getDeferAccept()

Specified by:

getDeferAccept in class AbstractEndpoint<Long,Long>

setIpv6v6only

public void setIpv6v6only(boolean ipv6v6only)

getIpv6v6only

public boolean getIpv6v6only()

setSendfileSize

public void setSendfileSize(int sendfileSize)

getSendfileSize

public int getSendfileSize()

getPollTime

public int getPollTime()

setPollTime

public void setPollTime(int pollTime)

setUseSendfile

public void setUseSendfile(boolean useSendfile)

Overrides:

setUseSendfile in class AbstractEndpoint<Long,Long>

getPoller

public AprEndpoint.Poller getPoller()

getSendfile

public AprEndpoint.Sendfile getSendfile()

getLocalAddress

public InetSocketAddress getLocalAddress()
                                  throws IOException

Description copied from class: AbstractEndpoint

Obtain the network address the server socket is bound to. This primarily exists to enable the correct address to be used when unlocking the server socket since it removes the guess-work involved if no address is specifically set.

Specified by:

getLocalAddress in class AbstractEndpoint<Long,Long>

Returns:

The network address that the server socket is listening on or null if the server socket is not currently bound.

Throws:

IOException - If there is a problem determining the currently bound socket

setMaxConnections

public void setMaxConnections(int maxConnections)

This endpoint does not support -1 for unlimited connections, nor does it support setting this attribute while the endpoint is running.

Overrides:

setMaxConnections in class AbstractEndpoint<Long,Long>

getKeepAliveCount

public int getKeepAliveCount()

Obtain the number of kept alive sockets.

Returns:

The number of open sockets currently managed by the Poller

getSendfileCount

public int getSendfileCount()

Obtain the number of sendfile sockets.

Returns:

The number of sockets currently managed by the Sendfile poller.

bind

public void bind()
          throws Exception

Initialize the endpoint.

Specified by:

bind in class AbstractEndpoint<Long,Long>

Throws:

Exception

createSSLContext

protected void createSSLContext(SSLHostConfig sslHostConfig)
                         throws Exception

Description copied from class: AbstractEndpoint

Create the SSLContextfor the the given SSLHostConfig.

Specified by:

createSSLContext in class AbstractEndpoint<Long,Long>

Parameters:

sslHostConfig - The SSLHostConfig for which the SSLContext should be created

Throws:

Exception - If the SSLContext cannot be created for the given SSLHostConfig

getSslContext

public long getSslContext(String sniHostName)

Description copied from interface: SSLContext.SNICallBack

This callback is made during the TLS handshake when the client uses the SNI extension to request a specific TLS host.

Specified by:

getSslContext in interface SSLContext.SNICallBack

Parameters:

sniHostName - The host name requested by the client

Returns:

The Java representation of the pointer to the OpenSSL SSLContext to use for the given host or zero if no SSLContext could be identified

isAlpnSupported

public boolean isAlpnSupported()

Description copied from class: AbstractEndpoint

Identifies if the endpoint supports ALPN. Note that a return value of true implies that AbstractEndpoint.isSSLEnabled() will also return true.

Specified by:

isAlpnSupported in class AbstractEndpoint<Long,Long>

Returns:

true if the endpoint supports ALPN in its current configuration, otherwise false.

startInternal

public void startInternal()
                   throws Exception

Start the APR endpoint, creating acceptor, poller and sendfile threads.

Specified by:

startInternal in class AbstractEndpoint<Long,Long>

Throws:

Exception

stopInternal

public void stopInternal()

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

Specified by:

stopInternal in class AbstractEndpoint<Long,Long>

unbind

public void unbind()
            throws Exception

Deallocate APR memory pools, and close server socket.

Specified by:

unbind in class AbstractEndpoint<Long,Long>

Throws:

Exception

doCloseServerSocket

protected void doCloseServerSocket()

Description copied from class: AbstractEndpoint

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

Specified by:

doCloseServerSocket in class AbstractEndpoint<Long,Long>

setSocketOptions

protected boolean setSocketOptions(SocketWrapperBase<Long> socketWrapper)

Process the specified connection.

Parameters:

socketWrapper - The socket wrapper

Returns:

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

allocatePoller

protected long allocatePoller(int size,
                              long pool,
                              int timeout)

Allocate a new poller of the specified size.

Parameters:

size - The size

pool - The pool from which the poller will be allocated

timeout - The timeout

Returns:

the poller pointer

setSocketOptions

protected boolean setSocketOptions(Long socket)

Process given socket. This is called when the socket has been accepted.

Specified by:

setSocketOptions in class AbstractEndpoint<Long,Long>

Parameters:

socket - The socket

Returns:

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

serverSocketAccept

protected Long serverSocketAccept()
                           throws Exception

Specified by:

serverSocketAccept in class AbstractEndpoint<Long,Long>

Throws:

Exception

processSocket

protected boolean processSocket(long socket,
                                SocketEvent event)

Process the given socket. Typically keep alive or upgraded protocol.

Parameters:

socket - The socket to process

event - The event to process

Returns:

true if the processing completed normally otherwise false which indicates an error occurred and that the socket should be closed

createSocketProcessor

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

Specified by:

createSocketProcessor in class AbstractEndpoint<Long,Long>

destroySocket

protected void destroySocket(Long 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<Long,Long>

Parameters:

socket - The newly accepted socket

getLog

protected Log getLog()

Specified by:

getLog in class AbstractEndpoint<Long,Long>