Class NetAcctClient.ConnectionMgr

java.lang.Object
  java.lang.Thread
      NetAcctClient.ConnectionMgr

All Implemented Interfaces:

Runnable

Enclosing class:

NetAcctClient

private class NetAcctClient.ConnectionMgr

extends Thread

Basically, this class keeps track of the connection to the NetAcctServer and trys to ensure that it is always connected. In order to accomplish this, the class will check to see if the socket is connected every CHECK_WAIT_TIME seconds. If it is not connected, then it tries to connect it, waiting RECONNECT_WAIT_TIME seconds between retries.

Author:

Kevin Thompson [antiduh@csh.rit.edu]

Field Summary

static int	CHECK_WAIT_TIME This is the amount of time (in seconds) to wait between checks.
private byte[]	nop The string to write as the 'no operation' operation command.
static int	RECONNECT_WAIT_TIME This is the amount of time (in seconds) to wait between reconnection attempts.
(package private) OutputStream	testOut
private boolean	wasConnected Used to keep track of whether or not the client was connected.

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

NetAcctClient.ConnectionMgr()
Initialize the ConnectionMgr class by getting a reference to the sockets OutputStream, then initializing the 'nop' variable that is used to send pings to the account server.

Method Summary

boolean	isConnected() Determines if the socket is connected or not.
void	reconnect() Attempts to reconnect the accounting client to the server, waiting RECONNECT_WAIT_TIME seconds between attempts.
void	run() Loops forever checking that the client is connected.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

testOut

OutputStream testOut

CHECK_WAIT_TIME

public static final int CHECK_WAIT_TIME

This is the amount of time (in seconds) to wait between checks.

See Also:

Constant Field Values

RECONNECT_WAIT_TIME

public static final int RECONNECT_WAIT_TIME

This is the amount of time (in seconds) to wait between reconnection attempts.

See Also:

Constant Field Values

nop

private byte[] nop

The string to write as the 'no operation' operation command.

wasConnected

private boolean wasConnected

Used to keep track of whether or not the client was connected. This is used to print statements when the client loses or regains connection.

Constructor Detail

NetAcctClient.ConnectionMgr

public NetAcctClient.ConnectionMgr()

Initialize the ConnectionMgr class by getting a reference to the sockets OutputStream, then initializing the 'nop' variable that is used to send pings to the account server.

Method Detail

run

public void run()

Loops forever checking that the client is connected. If it is not connected, it attempts to reconnect the client to the server, automatically.

isConnected

public boolean isConnected()

Determines if the socket is connected or not. Since the TINI Java 1.4 sdk does not contain a Socket.isConnected() method, this checks by trying to send a "nop-" command to the server. If the check does not throw an IOException, then it should be good.

Returns:

True if the connection is still valid. False otherwise.

reconnect

public void reconnect()

Attempts to reconnect the accounting client to the server, waiting RECONNECT_WAIT_TIME seconds between attempts.