Class ServerConnector

java.lang.Object

org.eclipse.jetty.util.component.AbstractLifeCycle

org.eclipse.jetty.util.component.ContainerLifeCycle

org.eclipse.jetty.server.AbstractConnector

org.eclipse.jetty.server.AbstractNetworkConnector

org.eclipse.jetty.server.ServerConnector

All Implemented Interfaces:

Closeable, AutoCloseable, Connector, NetworkConnector, Container, Destroyable, Dumpable, Dumpable.DumpableContainer, Graceful, LifeCycle

Direct Known Subclasses:

NetworkTrafficServerConnector

@ManagedObject("HTTP connector using NIO ByteChannels and Selectors")
public class ServerConnector
extends AbstractNetworkConnector

This Connector implementation is the primary connector for the Jetty server over TCP/IP. By the use of various ConnectionFactory instances it is able to accept connections for HTTP, HTTP/2 and WebSocket, either directly or over SSL.

The connector is a fully asynchronous NIO based implementation that by default will use all the commons services (eg Executor, Scheduler) of the passed Server instance, but all services may also be constructor injected into the connector so that it may operate with dedicated or otherwise shared services.

Connection Factories

Various convenience constructors are provided to assist with common configurations of ConnectionFactories, whose generic use is described in AbstractConnector. If no connection factories are passed, then the connector will default to use a HttpConnectionFactory. If an non null SslContextFactory instance is passed, then this used to instantiate a SslConnectionFactory which is prepended to the other passed or default factories.

Selectors

The default number of selectors is equal to half of the number of processors available to the JVM, which should allow optimal performance even if all the connections used are performing significant non-blocking work in the callback tasks.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	ServerConnector.ServerConnectorManager

Nested classes/interfaces inherited from class AbstractLifeCycle

AbstractLifeCycle.AbstractLifeCycleListener, AbstractLifeCycle.StopException

Nested classes/interfaces inherited from interface Container

Container.InheritedListener, Container.Listener

Nested classes/interfaces inherited from interface Dumpable

Dumpable.DumpableContainer

Nested classes/interfaces inherited from interface Graceful

Graceful.Shutdown, Graceful.ThrowingRunnable

Nested classes/interfaces inherited from interface LifeCycle

LifeCycle.Listener

Nested classes/interfaces inherited from interface NetworkConnector

NetworkConnector.Listener

Field Summary

Fields inherited from class AbstractConnector

LOG

Fields inherited from class AbstractLifeCycle

FAILED, STARTED, STARTING, STOPPED, STOPPING

Fields inherited from interface Dumpable

KEY

Constructor Summary

Constructors

Constructor	Description
ServerConnector(Server server)	Construct a ServerConnector with a private instance of HttpConnectionFactory as the only factory.
ServerConnector(Server server, int acceptors, int selectors)	Construct a ServerConnector with a private instance of HttpConnectionFactory as the only factory.
ServerConnector(Server server, int acceptors, int selectors, ConnectionFactory... factories)	Construct a ServerConnector with a private instance of HttpConnectionFactory as the only factory.
ServerConnector(Server server, int acceptors, int selectors, SslContextFactory.Server sslContextFactory)	Construct a ServerConnector with a private instance of HttpConnectionFactory as the primary protocol
ServerConnector(Server server, Executor executor, Scheduler scheduler, ByteBufferPool bufferPool, int acceptors, int selectors, ConnectionFactory... factories)
ServerConnector(Server server, ConnectionFactory... factories)	Construct a Server Connector with the passed Connection factories.
ServerConnector(Server server, SslContextFactory.Server sslContextFactory)	Construct a ServerConnector with a private instance of HttpConnectionFactory as the primary protocol
ServerConnector(Server server, SslContextFactory.Server sslContextFactory, ConnectionFactory... factories)

Method Summary

Modifier and Type	Method	Description
void	accept(int acceptorID)
void	close()	Performs the activities needed to close the network communication (for example, to stop accepting network connections).
protected void	configure(Socket socket)
protected void	doStart()	Starts the managed lifecycle beans in the order they were added.
protected void	doStop()	Stops the managed lifecycle beans in the reverse order they were added.
int	getAcceptedReceiveBufferSize()
int	getAcceptedSendBufferSize()
boolean	getAcceptedTcpNoDelay()
int	getAcceptQueueSize()
int	getLocalPort()
boolean	getReuseAddress()
SelectorManager	getSelectorManager()
Object	getTransport()	Get the underlying socket, channel, buffer etc. for the connector..
boolean	isInheritChannel()
boolean	isOpen()	A Connector may be opened and not started (to reserve a port) or closed and running (to allow graceful shutdown of existing connections)
boolean	isReusePort()
protected SocketChannelEndPoint	newEndPoint(SocketChannel channel, ManagedSelector selectSet, SelectionKey key)
protected SelectorManager	newSelectorManager(Executor executor, Scheduler scheduler, int selectors)
void	open()	Performs the activities needed to open the network communication (for example, to start accepting incoming network connections).
void	open(ServerSocketChannel acceptChannel)	Open the connector using the passed ServerSocketChannel.
protected ServerSocketChannel	openAcceptChannel()	Called by open() to obtain the accepting channel.
void	setAcceptedReceiveBufferSize(int receiveBufferSize)
void	setAcceptedSendBufferSize(int sendBufferSize)
void	setAcceptedTcpNoDelay(boolean tcpNoDelay)
void	setAccepting(boolean accepting)
void	setAcceptQueueSize(int acceptQueueSize)	Set the accept queue size (also known as accept backlog).
void	setInheritChannel(boolean inheritChannel)	Sets whether this connector uses a channel inherited from the JVM.
void	setReuseAddress(boolean reuseAddress)
void	setReusePort(boolean reusePort)	Set whether it is allowed to bind multiple server sockets to the same host and port.

Methods inherited from class AbstractNetworkConnector

getHost, getPort, handleAcceptFailure, setHost, setPort, shutdown, toString

Methods inherited from class AbstractConnector

addConnectionFactory, addFirstConnectionFactory, addIfAbsentConnectionFactory, clearConnectionFactories, getAcceptorPriorityDelta, getAcceptors, getByteBufferPool, getConnectedEndPoints, getConnectionFactories, getConnectionFactory, getConnectionFactory, getDefaultConnectionFactory, getDefaultProtocol, getExecutor, getIdleTimeout, getName, getProtocols, getScheduler, getServer, getShutdownIdleTimeout, interruptAcceptors, isAccepting, isShutdown, join, join, onEndPointClosed, onEndPointOpened, removeConnectionFactory, setAcceptorPriorityDelta, setConnectionFactories, setDefaultProtocol, setIdleTimeout, setName, setShutdownIdleTimeout

Methods inherited from class ContainerLifeCycle

addBean, addBean, addEventListener, addManaged, contains, destroy, dump, dump, dump, dumpObjects, dumpStdErr, getBean, getBeans, getBeans, getContainedBeans, getContainedBeans, installBean, installBean, isAuto, isManaged, isUnmanaged, manage, removeBean, removeBeans, removeEventListener, setBeans, start, stop, unmanage, updateBean, updateBean, updateBeans, updateBeans

Methods inherited from class AbstractLifeCycle

getEventListeners, getState, getState, isFailed, isRunning, isStarted, isStarting, isStopped, isStopping, setEventListeners, start, stop

Methods inherited from class Object

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

Methods inherited from interface Connector

getByteBufferPool, getConnectedEndPoints, getConnectionFactories, getConnectionFactory, getConnectionFactory, getDefaultConnectionFactory, getExecutor, getIdleTimeout, getName, getProtocols, getScheduler, getServer

Methods inherited from interface Container

addBean, addBean, addEventListener, getBean, getBeans, getBeans, getCachedBeans, getContainedBeans, getEventListeners, isManaged, manage, removeBean, removeEventListener, unmanage

Methods inherited from interface Dumpable

dump, dump, dumpSelf

Methods inherited from interface Dumpable.DumpableContainer

isDumpable

Methods inherited from interface Graceful

isShutdown

Methods inherited from interface LifeCycle

addEventListener, isFailed, isRunning, isStarted, isStarting, isStopped, isStopping, removeEventListener, start, stop

Constructor Details

ServerConnector

public ServerConnector(@Name("server")
 Server server)

Construct a ServerConnector with a private instance of HttpConnectionFactory as the only factory.

Parameters:

server - The Server this connector will accept connection for.

ServerConnector

public ServerConnector(@Name("server")
 Server server,
 @Name("acceptors")
 int acceptors,
 @Name("selectors")
 int selectors)

Construct a ServerConnector with a private instance of HttpConnectionFactory as the only factory.

Parameters:

server - The Server this connector will accept connection for.

acceptors - the number of acceptor threads to use, or -1 for a default value. Acceptors accept new TCP/IP connections. If 0, then the selector threads are used to accept connections.

selectors - the number of selector threads, or <=0 for a default value. Selectors notice and schedule established connection that can make IO progress.

ServerConnector

public ServerConnector(@Name("server")
 Server server,
 @Name("acceptors")
 int acceptors,
 @Name("selectors")
 int selectors,
 @Name("factories")
 ConnectionFactory... factories)

Construct a ServerConnector with a private instance of HttpConnectionFactory as the only factory.

Parameters:

server - The Server this connector will accept connection for.

acceptors - the number of acceptor threads to use, or -1 for a default value. Acceptors accept new TCP/IP connections. If 0, then the selector threads are used to accept connections.

selectors - the number of selector threads, or <=0 for a default value. Selectors notice and schedule established connection that can make IO progress.

factories - Zero or more ConnectionFactory instances used to create and configure connections.

ServerConnector

public ServerConnector(@Name("server")
 Server server,
 @Name("factories")
 ConnectionFactory... factories)

Construct a Server Connector with the passed Connection factories.

Parameters:

server - The Server this connector will accept connection for.

factories - Zero or more ConnectionFactory instances used to create and configure connections.

ServerConnector

public ServerConnector(@Name("server")
 Server server,
 @Name("sslContextFactory")
 SslContextFactory.Server sslContextFactory)

Construct a ServerConnector with a private instance of HttpConnectionFactory as the primary protocol

.

Parameters:

server - The Server this connector will accept connection for.

sslContextFactory - If non null, then a SslConnectionFactory is instantiated and prepended to the list of HTTP Connection Factory.

ServerConnector

public ServerConnector(@Name("server")
 Server server,
 @Name("acceptors")
 int acceptors,
 @Name("selectors")
 int selectors,
 @Name("sslContextFactory")
 SslContextFactory.Server sslContextFactory)

Construct a ServerConnector with a private instance of HttpConnectionFactory as the primary protocol

.

Parameters:

server - The Server this connector will accept connection for.

acceptors - the number of acceptor threads to use, or -1 for a default value. Acceptors accept new TCP/IP connections. If 0, then the selector threads are used to accept connections.

selectors - the number of selector threads, or <=0 for a default value. Selectors notice and schedule established connection that can make IO progress.

sslContextFactory - If non null, then a SslConnectionFactory is instantiated and prepended to the list of HTTP Connection Factory.

ServerConnector

public ServerConnector(@Name("server")
 Server server,
 @Name("sslContextFactory")
 SslContextFactory.Server sslContextFactory,
 @Name("factories")
 ConnectionFactory... factories)

Parameters:

server - The Server this connector will accept connection for.

sslContextFactory - If non null, then a SslConnectionFactory is instantiated and prepended to the list of ConnectionFactories, with the first factory being the default protocol for the SslConnectionFactory.

factories - Zero or more ConnectionFactory instances used to create and configure connections.

ServerConnector

public ServerConnector(@Name("server")
 Server server,
 @Name("executor")
 Executor executor,
 @Name("scheduler")
 Scheduler scheduler,
 @Name("bufferPool")
 ByteBufferPool bufferPool,
 @Name("acceptors")
 int acceptors,
 @Name("selectors")
 int selectors,
 @Name("factories")
 ConnectionFactory... factories)

Parameters:

server - The server this connector will be accept connection for.

executor - An executor used to run tasks for handling requests, acceptors and selectors. If null then use the servers executor

scheduler - A scheduler used to schedule timeouts. If null then use the servers scheduler

bufferPool - A ByteBuffer pool used to allocate buffers. If null then create a private pool with default configuration.

acceptors - the number of acceptor threads to use, or -1 for a default value. Acceptors accept new TCP/IP connections. If 0, then the selector threads are used to accept connections.

selectors - the number of selector threads, or <=0 for a default value. Selectors notice and schedule established connection that can make IO progress.

factories - Zero or more ConnectionFactory instances used to create and configure connections.

Method Details

newSelectorManager

protected SelectorManager newSelectorManager(Executor executor,
 Scheduler scheduler,
 int selectors)

doStart

protected void doStart()
                throws Exception

Description copied from class: ContainerLifeCycle

Starts the managed lifecycle beans in the order they were added.

Overrides:

doStart in class AbstractNetworkConnector

Throws:

Exception - If there was a problem starting. Will cause a transition to FAILED state

doStop

protected void doStop()
               throws Exception

Description copied from class: ContainerLifeCycle

Stops the managed lifecycle beans in the reverse order they were added.

Overrides:

doStop in class AbstractNetworkConnector

Throws:

Exception - If there was a problem stopping. Will cause a transition to FAILED state

isOpen

public boolean isOpen()

Description copied from interface: NetworkConnector

A Connector may be opened and not started (to reserve a port) or closed and running (to allow graceful shutdown of existing connections)

Returns:

True if the connector is Open.

isInheritChannel

public boolean isInheritChannel()

Returns:

whether this connector uses a channel inherited from the JVM.

See Also:

• System.inheritedChannel()

setInheritChannel

public void setInheritChannel(boolean inheritChannel)

Sets whether this connector uses a channel inherited from the JVM.

If true, the connector first tries to inherit from a channel provided by the system. If there is no inherited channel available, or if the inherited channel is not usable, then it will fall back using ServerSocketChannel.

Use it with xinetd/inetd, to launch an instance of Jetty on demand. The port used to access pages on the Jetty instance is the same as the port used to launch Jetty.

Parameters:

inheritChannel - whether this connector uses a channel inherited from the JVM.

See Also:

• openAcceptChannel()

open

public void open(ServerSocketChannel acceptChannel)
          throws IOException

Open the connector using the passed ServerSocketChannel. This open method can be called before starting the connector to pass it a ServerSocketChannel that will be used instead of one returned from openAcceptChannel()

Parameters:

acceptChannel - the channel to use

Throws:

IOException - if the server channel is not bound

open

public void open()
          throws IOException

Description copied from interface: NetworkConnector

Performs the activities needed to open the network communication (for example, to start accepting incoming network connections).

Implementation must be idempotent.

Specified by:

open in interface NetworkConnector

Overrides:

open in class AbstractNetworkConnector

Throws:

IOException - if this connector cannot be opened

See Also:

• NetworkConnector.close()

openAcceptChannel

protected ServerSocketChannel openAcceptChannel()
                                         throws IOException

Called by open() to obtain the accepting channel.

Returns:

ServerSocketChannel used to accept connections.

Throws:

IOException - if unable to obtain or configure the server channel

close

public void close()

Description copied from interface: NetworkConnector

Performs the activities needed to close the network communication (for example, to stop accepting network connections).

Once a connector has been closed, it cannot be opened again without first calling LifeCycle.stop() and it will not be active again until a subsequent call to LifeCycle.start().

Implementation must be idempotent.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface NetworkConnector

Overrides:

close in class AbstractNetworkConnector

accept

public void accept(int acceptorID)
            throws IOException

Specified by:

accept in class AbstractConnector

Throws:

IOException

configure

protected void configure(Socket socket)

getSelectorManager

@ManagedAttribute("The Selector Manager")
public SelectorManager getSelectorManager()

getTransport

public Object getTransport()

Description copied from interface: Connector

Get the underlying socket, channel, buffer etc. for the connector..

Returns:

the underlying socket, channel, buffer etc. for the connector.

getLocalPort

@ManagedAttribute("local port")
public int getLocalPort()

Specified by:

getLocalPort in interface NetworkConnector

Overrides:

getLocalPort in class AbstractNetworkConnector

Returns:

The actual port the connector is listening on, or -1 if it has not been opened, or -2 if it has been closed.

newEndPoint

protected SocketChannelEndPoint newEndPoint(SocketChannel channel,
 ManagedSelector selectSet,
 SelectionKey key)
                                     throws IOException

Throws:

IOException

getAcceptQueueSize

@ManagedAttribute("Accept Queue size")
public int getAcceptQueueSize()

Returns:

the accept queue size

setAcceptQueueSize

public void setAcceptQueueSize(int acceptQueueSize)

Set the accept queue size (also known as accept backlog).

Parameters:

acceptQueueSize - the accept queue size (also known as accept backlog)

getReuseAddress

@ManagedAttribute("Server Socket SO_REUSEADDR")
public boolean getReuseAddress()

Returns:

whether rebinding the server socket is allowed with sockets in tear-down states

See Also:

• ServerSocket.getReuseAddress()

setReuseAddress

public void setReuseAddress(boolean reuseAddress)

Parameters:

reuseAddress - whether rebinding the server socket is allowed with sockets in tear-down states

See Also:

• ServerSocket.setReuseAddress(boolean)

isReusePort

@ManagedAttribute("Server Socket SO_REUSEPORT")
public boolean isReusePort()

Returns:

whether it is allowed to bind multiple server sockets to the same host and port

setReusePort

public void setReusePort(boolean reusePort)

Set whether it is allowed to bind multiple server sockets to the same host and port.

Parameters:

reusePort - whether it is allowed to bind multiple server sockets to the same host and port

getAcceptedTcpNoDelay

@ManagedAttribute("Accepted Socket TCP_NODELAY")
public boolean getAcceptedTcpNoDelay()

Returns:

whether the accepted socket gets TCP_NODELAY enabled.

See Also:

• Socket.getTcpNoDelay()

setAcceptedTcpNoDelay

public void setAcceptedTcpNoDelay(boolean tcpNoDelay)

Parameters:

tcpNoDelay - whether TCP_NODELAY gets enabled on the the accepted socket.

See Also:

• Socket.setTcpNoDelay(boolean)

getAcceptedReceiveBufferSize

@ManagedAttribute("Accepted Socket SO_RCVBUF")
public int getAcceptedReceiveBufferSize()

Returns:

the SO_RCVBUF size to set onto the accepted socket. A value of -1 indicates that it is left to its default value.

See Also:

• Socket.getReceiveBufferSize()

setAcceptedReceiveBufferSize

public void setAcceptedReceiveBufferSize(int receiveBufferSize)

Parameters:

receiveBufferSize - the SO_RCVBUF size to set onto the accepted socket. A value of -1 indicates that it is left to its default value.

See Also:

• Socket.setReceiveBufferSize(int)

getAcceptedSendBufferSize

@ManagedAttribute("Accepted Socket SO_SNDBUF")
public int getAcceptedSendBufferSize()

Returns:

the SO_SNDBUF size to set onto the accepted socket. A value of -1 indicates that it is left to its default value.

See Also:

• Socket.getSendBufferSize()

setAcceptedSendBufferSize

public void setAcceptedSendBufferSize(int sendBufferSize)

Parameters:

sendBufferSize - the SO_SNDBUF size to set onto the accepted socket. A value of -1 indicates that it is left to its default value.

See Also:

• Socket.setSendBufferSize(int)

setAccepting

public void setAccepting(boolean accepting)

Overrides:

setAccepting in class AbstractConnector