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//---PACKAGE DECLARATION--- |
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package uk.org.iscream.cms.server.filter; |
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|
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//---IMPORTS--- |
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import uk.org.iscream.cms.server.core.*; |
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import uk.org.iscream.cms.server.componentmanager.*; |
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import uk.org.iscream.cms.server.filter.*; |
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import java.net.Socket; |
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import java.net.ServerSocket; |
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import java.io.OutputStream; |
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import java.io.IOException; |
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import java.net.InetAddress; |
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import java.net.UnknownHostException; |
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import uk.org.iscream.cms.server.util.*; |
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|
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/** |
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* Reads TCP Heartbeats from the host applications. |
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* |
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* @author $Author: tdb $ |
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* @version $Id: TCPReader.java,v 1.13 2002/03/19 17:22:12 tdb Exp $ |
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*/ |
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class TCPReader extends Thread { |
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|
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//---FINAL ATTRIBUTES--- |
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|
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/** |
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* The current CVS revision of this class |
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*/ |
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public final String REVISION = "$Revision: 1.13 $"; |
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|
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//---STATIC METHODS--- |
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|
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//---CONSTRUCTORS--- |
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|
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/** |
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* Constructs a new TCPReader |
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* |
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* @param queue A reference to our Queue |
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* @param port The port that the TCPReader will listen on |
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*/ |
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public TCPReader(int port, Queue queue) { |
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// set the Thread name |
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setName("filter.TCPReader"); |
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|
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_port = port; |
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_queue = queue; |
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_logger.write(toString(), Logger.SYSINIT, "started"); |
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} |
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|
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|
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|
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//---PUBLIC METHODS--- |
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|
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/** |
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* The run() method is the main loop for this thread, and we |
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* will remain in here until such a point as something goes |
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* wrong with the listening. After initially setting up the |
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* ServerSocket we go round a while loop receiving connections |
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* and then passing them off to other processes to deal with. |
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*/ |
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public void run(){ |
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// get our ACL from the configuration |
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ACL acl = null; |
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try { |
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String stringACL = ConfigurationProxy.getInstance().getProperty(FilterMain.NAME, "Filter.TCPACL"); |
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acl = new ACL(stringACL); |
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} |
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catch(PropertyNotFoundException e) { |
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_logger.write(toString(), Logger.WARNING, "No ACL found for TCPReader: " + e); |
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} |
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|
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ServerSocket listenPort=null; |
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try{ |
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// Setup the ServerSocket so that clients can connect |
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// use an ACLServerSocket if we have an ACL |
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if(acl != null) { |
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listenPort = new ACLServerSocket(acl, _port); |
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} |
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else { |
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listenPort = new ServerSocket(_port); |
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} |
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} |
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catch(IOException e){ |
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} |
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|
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// Log what machine/port we're listening on |
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try{ |
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_logger.write(toString(), Logger.SYSMSG, "TCPReader listening on " |
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+InetAddress.getLocalHost().getHostName() |
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+"/"+InetAddress.getLocalHost().getHostAddress() |
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+" port "+listenPort.getLocalPort()); |
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} |
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catch(UnknownHostException e){ |
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_logger.write(toString(), Logger.SYSMSG, "TCPReader listening on UnknownHost " |
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+"port "+listenPort.getLocalPort()); |
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} |
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|
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// We use this boolean so we can break out of the while loop if we want |
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boolean run = true; |
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|
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// Loop round constantly until we decide to stop |
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while(run){ |
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Socket hostSocket=null; |
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try{ |
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_logger.write(toString(), Logger.DEBUG, "Waiting for Connection"); |
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// This will block until a host connects - at which point we get a Socket |
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hostSocket = listenPort.accept(); |
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_logger.write(toString(), Logger.DEBUG, "Connection accepted from: " + hostSocket.toString()); |
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} |
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catch(IOException e){ |
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// Something went wrong with the ServerSocket, so we'll stop listening |
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run=false; |
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} |
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// If we've stopped on the line above we won't want to try this ! |
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if(run){ |
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try { |
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// Setup the TCPReaderInit and start it |
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TCPReaderInit init = new TCPReaderInit(hostSocket, _queue); |
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// and start it |
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init.start(); |
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} catch (IOException e) { |
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_logger.write(toString(), Logger.ERROR, e.toString()); |
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} |
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} |
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} |
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// Best log the fact that we're stopping |
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_logger.write(toString(), Logger.FATAL, "Fatal error, shutdown pending"); |
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} |
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|
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/** |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
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* method to provide clean logging (every class should have this). |
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* |
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* This uses the uk.org.iscream.cms.server.util.NameFormat class |
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* to format the toString() |
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* |
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* @return the name of this class and its CVS revision |
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*/ |
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public String toString() { |
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return FormatName.getName( |
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_name, |
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getClass().getName(), |
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REVISION); |
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} |
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|
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//---PRIVATE METHODS--- |
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|
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//---ACCESSOR/MUTATOR METHODS--- |
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|
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//---ATTRIBUTES--- |
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|
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/** |
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* This is the friendly identifier of the |
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* component this class is running in. |
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* eg, a Filter may be called "filter1", |
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* If this class does not have an owning |
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* component, a name from the configuration |
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* can be placed here. This name could also |
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* be changed to null for utility classes. |
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*/ |
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private String _name = FilterMain.NAME; |
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|
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/** |
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* This holds a reference to the |
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* system logger that is being used. |
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*/ |
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private Logger _logger = ReferenceManager.getInstance().getLogger(); |
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|
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/** |
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* The port on which the server should listen. |
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*/ |
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private int _port; |
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|
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/** |
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* A reference to our Queue |
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*/ |
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private Queue _queue; |
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|
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//---STATIC ATTRIBUTES--- |
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|
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} |
