org.apache.excalibur.instrument.manager.http.server

Class AbstractSocketServer

java.lang.Object

org.apache.avalon.framework.logger.AbstractLogEnabled

org.apache.excalibur.instrument.AbstractLogEnabledInstrumentable

org.apache.excalibur.instrument.manager.http.server.AbstractLogEnabledInstrumentableStartable

org.apache.excalibur.instrument.manager.http.server.AbstractSocketServer

All Implemented Interfaces:

java.lang.Runnable, org.apache.avalon.framework.activity.Startable, org.apache.avalon.framework.logger.LogEnabled, org.apache.excalibur.instrument.Instrumentable

Direct Known Subclasses:

HTTPServer

abstract class AbstractSocketServer
extends AbstractLogEnabledInstrumentableStartable

Version:

$Revision: 1.6 $

Author:

Avalon Development Team

Field Summary

Fields

Modifier and Type	Field and Description
private int	m_backlog The backlog to assign to the server socket.
private java.net.InetAddress	m_bindAddr The address to bind the port server to.
private org.apache.excalibur.instrument.CounterInstrument	m_instrumentConnects Number of times that the server socket is connected to.
private org.apache.excalibur.instrument.CounterInstrument	m_instrumentDisconnects Number of times that a connection socket disconnects.
private org.apache.excalibur.instrument.ValueInstrument	m_instrumentOpenSockets Number of sockets that are connected at any given time.
private java.util.List	m_openSockets Used to track the number of open sockets.
private int	m_port The port to listen on for connections.
private java.lang.Object	m_semaphore Semaphore used to synchronize actions contained in this class.
private java.net.ServerSocket	m_serverSocket Reference to the ServerSocket.
private long	m_shutdownTimeout The time in ms after the component starts to shutdown that sockets will have to shutdown on their own before they are closed.
private int	m_soTimeout The SO_TIMEOUT to use for client sockets.
private boolean	m_started Flag which keeps track of when the server has been started.

Fields inherited from interface org.apache.excalibur.instrument.Instrumentable

EMPTY_INSTRUMENT_ARRAY, EMPTY_INSTRUMENTABLE_ARRAY

Constructor Summary

Constructors

Constructor and Description
AbstractSocketServer(int port, java.net.InetAddress bindAddress) Creates a new AbstractSocketServer.

Method Summary

Methods

Modifier and Type	Method and Description
protected int	getSoTimeout()
protected abstract void	handleSocket(java.net.Socket socket) Handle a newly connected socket.
private void	handleSocketInner(java.net.Socket socket) Keeps track of instrumentation related to the life of a socket as well as handles any errors encountered while handling the socket in the user code.
protected void	runner() Runner method that will be called when the component is started.
void	start() Starts the runner thread.
protected void	stopRunner() Called when the component is being stopped, the isStopping method will always return true when this method is called.

Methods inherited from class org.apache.excalibur.instrument.manager.http.server.AbstractLogEnabledInstrumentableStartable

isStopping, run, stop

Methods inherited from class org.apache.excalibur.instrument.AbstractLogEnabledInstrumentable

addChildInstrumentable, addInstrument, getChildInstrumentables, getInstrumentableName, getInstruments, setInstrumentableName

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

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

Field Detail

m_semaphore

private java.lang.Object m_semaphore

Semaphore used to synchronize actions contained in this class. This is to avoid unintended problems with synchronization performed by subclasses this is important here because this is a server and actions from one thread can cause a call out through a socket into another thread and cause deadlocks.

m_port

private int m_port

The port to listen on for connections.

m_backlog

private int m_backlog

The backlog to assign to the server socket.

m_bindAddr

private java.net.InetAddress m_bindAddr

The address to bind the port server to. Null for any address.

m_soTimeout

private int m_soTimeout

The SO_TIMEOUT to use for client sockets.

m_shutdownTimeout

private long m_shutdownTimeout

The time in ms after the component starts to shutdown that sockets will have to shutdown on their own before they are closed.

m_started

private boolean m_started

Flag which keeps track of when the server has been started.

m_serverSocket

private java.net.ServerSocket m_serverSocket

Reference to the ServerSocket.

m_openSockets

private java.util.List m_openSockets

Used to track the number of open sockets.

m_instrumentConnects

private org.apache.excalibur.instrument.CounterInstrument m_instrumentConnects

Number of times that the server socket is connected to.

m_instrumentOpenSockets

private org.apache.excalibur.instrument.ValueInstrument m_instrumentOpenSockets

Number of sockets that are connected at any given time.

m_instrumentDisconnects

private org.apache.excalibur.instrument.CounterInstrument m_instrumentDisconnects

Number of times that a connection socket disconnects.

Constructor Detail

AbstractSocketServer

public AbstractSocketServer(int port,
                    java.net.InetAddress bindAddress)

Creates a new AbstractSocketServer.

Parameters:

port - The port on which the server will listen.

bindAddress - The address on which the server will listen for connections.

Method Detail

start

public void start()
           throws java.lang.Exception

Starts the runner thread.

Specified by:

start in interface org.apache.avalon.framework.activity.Startable

Overrides:

start in class AbstractLogEnabledInstrumentableStartable

Throws:

java.lang.Exception - If there are any problems.

stopRunner

protected void stopRunner()
                   throws java.lang.Exception

Called when the component is being stopped, the isStopping method will always return true when this method is called.

Overrides:

stopRunner in class AbstractLogEnabledInstrumentableStartable

Throws:

java.lang.Exception - If there are any problems

runner

protected void runner()

Runner method that will be called when the component is started. The method must monitor the isStopping() method and make sure that it returns in a timely manner when the isStopping() method returns true.

Specified by:

runner in class AbstractLogEnabledInstrumentableStartable

handleSocket

protected abstract void handleSocket(java.net.Socket socket)

Handle a newly connected socket. The implementation need not worry about closing the socket.

Parameters:

socket - Newly connected Socket to be handled.

handleSocketInner

private void handleSocketInner(java.net.Socket socket)

Keeps track of instrumentation related to the life of a socket as well as handles any errors encountered while handling the socket in the user code.

Parameters:

socket - The socket to be handled.

getSoTimeout

protected int getSoTimeout()