com.go.trove.net
Class LazySocketFactory

java.lang.Object
  |
  +--com.go.trove.net.LazySocketFactory
All Implemented Interfaces:
SocketFactory

public class LazySocketFactory
extends java.lang.Object
implements SocketFactory

A socket implementation that lazily establishs a connection. It only connects when actually needed. Setting options and getting I/O streams will not force a connection to be established. As soon as a read or write operation is performed, a connection is established.

If the first write operation requires a connection to be established, then a recycled connection is requested. The connection is tested by writing the data to it. If this fails, a new connection is requested and the operation is tried again.

Version:
4 , 00/12/05
Author:
Brian S O'Neill

Constructor Summary
LazySocketFactory(SocketFactory factory)
           
 
Method Summary
 void clear()
          Closes all recycled connections, but does not prevent new connections from being created and recycled.
 CheckedSocket createSocket()
          Must always return a new socket connection.
 CheckedSocket createSocket(long timeout)
          Returns a new socket connection.
 CheckedSocket createSocket(java.lang.Object session)
          Returns a new socket connection.
 CheckedSocket createSocket(java.lang.Object session, long timeout)
          Returns a new socket connection.
 int getAvailableCount()
          Returns the number of recycled sockets currently available.
 long getDefaultTimeout()
          Returns the default timeout for creating or getting sockets or -1 if infinite.
 InetAddressAndPort getInetAddressAndPort()
          Returns the InetAddress and port that this factory will most likely connect to.
 InetAddressAndPort getInetAddressAndPort(java.lang.Object session)
          Returns the InetAddress and port that this factory will most likely connect to.
 CheckedSocket getSocket()
          Returns a socket that will lazily connect.
 CheckedSocket getSocket(long timeout)
          Returns a socket that will lazily connect.
 CheckedSocket getSocket(java.lang.Object session)
          Returns a socket that will lazily connect.
 CheckedSocket getSocket(java.lang.Object session, long timeout)
          Returns a socket that will lazily connect.
 void recycleSocket(CheckedSocket cs)
          Recycle a socket connection that was returned from the getSocket or createSocket methods.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

LazySocketFactory

public LazySocketFactory(SocketFactory factory)
Method Detail

getInetAddressAndPort

public InetAddressAndPort getInetAddressAndPort()
Description copied from interface: SocketFactory
Returns the InetAddress and port that this factory will most likely connect to. If the address isn't precisely known, its value is 0.0.0.0. If the port isn't known, its value is -1.
Specified by:
getInetAddressAndPort in interface SocketFactory

getInetAddressAndPort

public InetAddressAndPort getInetAddressAndPort(java.lang.Object session)
Description copied from interface: SocketFactory
Returns the InetAddress and port that this factory will most likely connect to. If the address isn't precisely known, its value is 0.0.0.0. If the port isn't known, its value is -1.
Specified by:
getInetAddressAndPort in interface SocketFactory
Following copied from interface: com.go.trove.net.SocketFactory
Parameters:
session - Object whose hashcode might be used to select a specific connection if factory is distributed. If null, then no session is used.

getDefaultTimeout

public long getDefaultTimeout()
Description copied from interface: SocketFactory
Returns the default timeout for creating or getting sockets or -1 if infinite.
Specified by:
getDefaultTimeout in interface SocketFactory

createSocket

public CheckedSocket createSocket()
                           throws java.net.ConnectException,
                                  java.net.SocketException
Description copied from interface: SocketFactory
Must always return a new socket connection. When the socket is no longer needed, call recycleSocket so that it be used again.
Specified by:
createSocket in interface SocketFactory
Following copied from interface: com.go.trove.net.SocketFactory
Throws:
java.net.ConnectException - if timeout has elapsed and no socket is available or factory is closed

createSocket

public CheckedSocket createSocket(java.lang.Object session)
                           throws java.net.ConnectException,
                                  java.net.SocketException
Description copied from interface: SocketFactory
Returns a new socket connection. When the socket is no longer needed, call recycleSocket so that it be used again.
Specified by:
createSocket in interface SocketFactory
Following copied from interface: com.go.trove.net.SocketFactory
Parameters:
session - Object whose hashcode might be used to select a specific connection if factory is distributed. If null, then no session is used.
Throws:
java.net.ConnectException - if timeout has elapsed and no socket is available or factory is closed

createSocket

public CheckedSocket createSocket(long timeout)
                           throws java.net.ConnectException,
                                  java.net.SocketException
Description copied from interface: SocketFactory
Returns a new socket connection. When the socket is no longer needed, call recycleSocket so that it be used again.
Specified by:
createSocket in interface SocketFactory
Following copied from interface: com.go.trove.net.SocketFactory
Parameters:
timeout - Maximum time to wait (in milliseconds) for a connection to be created before throwing a ConnectException
Throws:
java.net.ConnectException - if timeout has elapsed and no socket is available or factory is closed

createSocket

public CheckedSocket createSocket(java.lang.Object session,
                                  long timeout)
                           throws java.net.ConnectException,
                                  java.net.SocketException
Description copied from interface: SocketFactory
Returns a new socket connection. When the socket is no longer needed, call recycleSocket so that it be used again.
Specified by:
createSocket in interface SocketFactory
Following copied from interface: com.go.trove.net.SocketFactory
Parameters:
session - Object whose hashcode might be used to select a specific connection if factory is distributed. If null, then no session is used.
timeout - Maximum time to wait (in milliseconds) for a connection to become available before throwing an exception
Throws:
java.net.ConnectException - if timeout has elapsed and no socket is available or factory is closed

getSocket

public CheckedSocket getSocket()
                        throws java.net.ConnectException,
                               java.net.SocketException
Returns a socket that will lazily connect.
Specified by:
getSocket in interface SocketFactory
Following copied from interface: com.go.trove.net.SocketFactory
Throws:
java.net.ConnectException - if timeout has elapsed and no socket is available or factory is closed

getSocket

public CheckedSocket getSocket(java.lang.Object session)
                        throws java.net.ConnectException,
                               java.net.SocketException
Returns a socket that will lazily connect.
Specified by:
getSocket in interface SocketFactory
Following copied from interface: com.go.trove.net.SocketFactory
Parameters:
session - Object whose hashcode might be used to select a specific connection if factory is distributed. If null, then no session is used.
Throws:
java.net.ConnectException - if timeout has elapsed and no socket is available or factory is closed

getSocket

public CheckedSocket getSocket(long timeout)
                        throws java.net.ConnectException,
                               java.net.SocketException
Returns a socket that will lazily connect.
Specified by:
getSocket in interface SocketFactory
Following copied from interface: com.go.trove.net.SocketFactory
Parameters:
timeout - Maximum time to wait (in milliseconds) for a connection to be returned before throwing a ConnectException
Throws:
java.net.ConnectException - if timeout has elapsed and no socket is available or factory is closed

getSocket

public CheckedSocket getSocket(java.lang.Object session,
                               long timeout)
                        throws java.net.ConnectException,
                               java.net.SocketException
Returns a socket that will lazily connect.
Specified by:
getSocket in interface SocketFactory
Following copied from interface: com.go.trove.net.SocketFactory
Parameters:
session - Object whose hashcode might be used to select a specific connection if factory is distributed. If null, then no session is used.
timeout - Maximum time to wait (in milliseconds) for a connection to be returned before throwing a ConnectException
Throws:
java.net.ConnectException - if timeout has elapsed and no socket is available or factory is closed

recycleSocket

public void recycleSocket(CheckedSocket cs)
                   throws java.net.SocketException,
                          java.lang.IllegalArgumentException
Description copied from interface: SocketFactory
Recycle a socket connection that was returned from the getSocket or createSocket methods. Since SocketFactory has no knowledge of any protocol being used on the socket, it is the responsibility of the caller to ensure the socket is in a "clean" state. Depending on implementation, the recycled socket may simply be closed.
Specified by:
recycleSocket in interface SocketFactory
Following copied from interface: com.go.trove.net.SocketFactory
Parameters:
socket - Socket which must have come from this factory. Passing in null is ignored.

clear

public void clear()
Description copied from interface: SocketFactory
Closes all recycled connections, but does not prevent new connections from being created and recycled.
Specified by:
clear in interface SocketFactory

getAvailableCount

public int getAvailableCount()
Description copied from interface: SocketFactory
Returns the number of recycled sockets currently available.
Specified by:
getAvailableCount in interface SocketFactory