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/* |
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* i-scream central monitoring system |
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* http://www.i-scream.org |
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* Copyright (C) 2000-2002 i-scream |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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*/ |
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|
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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.filtermanager; |
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package uk.org.iscream.cms.server.filtermanager; |
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|
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//---IMPORTS--- |
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import uk.ac.ukc.iscream.core.*; |
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import uk.ac.ukc.iscream.filter.*; |
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import java.net.Socket; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
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import java.io.IOException; |
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import uk.org.iscream.cms.server.core.*; |
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import uk.org.iscream.cms.server.filter.*; |
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import uk.org.iscream.cms.util.*; |
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import uk.org.iscream.cms.server.componentmanager.*; |
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import java.net.*; |
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import java.io.*; |
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import org.omg.CORBA.*; |
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import org.omg.CosNaming.*; |
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import java.util.*; |
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|
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/** |
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* <ONE LINE DESCRIPTION> |
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* <DETAILED DESCRIPTION> |
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* Handles setting up a host. |
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* This class provides a host with appropriate configuration |
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* and a reference to a Filter to which it should pass data. |
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* |
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* @author $Author$ |
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* @version $Id$ |
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|
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//---CONSTRUCTORS--- |
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|
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public HostInit(Socket socket, ConfigurationManager configManager, Logger logRef, NamingContextExt ncRef) throws IOException { |
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_configManager = configManager; |
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_logRef = logRef; |
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/** |
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* Construct a new HostInit. |
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* |
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* @param socket The socket to which the host is connected |
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*/ |
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public HostInit(Socket socket) throws IOException { |
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// set the Thread name |
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setName("filtermanager.HostInit"); |
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|
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_socket = socket; |
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_ncRef = ncRef; |
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// setup reader & writer |
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_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream())); |
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_socketOut = new PrintWriter(_socket.getOutputStream()); |
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_logRef.write(toString(), Logger.SYSINIT, "created"); |
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_socketOut = new PrintWriter(_socket.getOutputStream(), true); |
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_logger.write(toString(), Logger.SYSINIT, "created"); |
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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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* Main method in this class, which handles communicating with |
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* the host to determine it's setup. |
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*/ |
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public void run() { |
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// get a hook on the config proxy |
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ConfigurationProxy cp = ConfigurationProxy.getInstance(); |
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// this is our config name |
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String configName = "Host." + _socket.getInetAddress().getHostName().toLowerCase(); |
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try { |
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String inBound = _socketIn.readLine(); |
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if (!inBound.equals("STARTCONFIG")) { |
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_socketOut.println("ERROR"); |
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_socketOut.flush(); |
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throw new IOException("protocol error - expected:STARTCONFIG got:" + inBound); |
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} |
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|
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Configuration myConfig = _configManager.getConfiguration("Host." + _socket.getInetAddress().getHostName().toLowerCase()); |
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if (myConfig == null) { |
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_socketOut.println("ERROR"); |
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throw new IOException("error in host configuration"); |
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} else { |
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_socketOut.println("OK"); |
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_socketOut.flush(); |
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|
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// get lastmodified |
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inBound = _socketIn.readLine(); |
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if(!inBound.equals("LASTMODIFIED")) { |
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// protocol error |
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_socketOut.println("ERROR"); |
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_socketOut.flush(); |
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throw new IOException("protocol error - expected:LASTMODIFIED got:" + inBound); |
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// look for a command: |
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// STARTCONFIG - to get a configuration |
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// CHECKCONFIG - to check a configuration |
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// END - to finish |
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String cmd = getInBound(); |
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while(!cmd.equals("END")) { |
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if(cmd.equals("STARTCONFIG")) { |
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// respond to STARTCONFIG |
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send("OK"); |
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|
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// try for LASTMODIFIED |
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getInBound("LASTMODIFIED"); |
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send("" + cp.getLastModified(configName)); |
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|
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// try for FILELIST |
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getInBound("FILELIST"); |
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send(cp.getFileList(configName)); |
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|
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// try for FQDN |
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getInBound("FQDN"); |
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send(_socket.getInetAddress().getHostName().toLowerCase()); |
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|
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// try for IP |
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getInBound("IP"); |
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send(_socket.getInetAddress().getHostAddress()); |
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|
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// get properties |
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String reqProperty = getInBound(); |
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while(!reqProperty.equals("ENDCONFIG")) { |
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// get the property |
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try { |
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String returnedProperty = cp.getProperty(configName, "Host."+reqProperty); |
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send(returnedProperty); |
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} catch (PropertyNotFoundException e) { |
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send("ERROR"); |
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} |
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// get the next request |
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reqProperty = _socketIn.readLine(); |
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} |
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_logger.write(toString(), Logger.SYSMSG, "configured host"); |
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send("OK"); |
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|
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// get filter reference |
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getInBound("FILTER"); |
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// send info |
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String filterList = cp.getProperty(configName, "Host.filter"); |
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FilterInfo filterInfoRef = null; |
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String filter = null; |
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StringTokenizer st = new StringTokenizer(filterList, ";"); |
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while (filterInfoRef==null && st.hasMoreTokens()) { |
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filter = st.nextToken(); |
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_logger.write(toString(), Logger.DEBUG, " looking for filter- " + filter); |
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try { |
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filterInfoRef = FilterInfoHelper.narrow(ReferenceManager.getInstance().getCORBARef("iscream.FilterInfo\\." + filter)); |
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} catch (ComponentCORBAException e) { |
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_logger.write(toString(), Logger.DEBUG, " unable to find filter- " + filter); |
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} |
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} |
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|
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// hopefully we found a filter |
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if(filterInfoRef != null) { |
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_logger.write(toString(), Logger.DEBUG, " found filter- " + filter); |
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try { |
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// tell the host about it... |
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send(filterInfoRef.getHostName() + ";" |
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+ filterInfoRef.getUDPPort()); |
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} |
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catch(org.omg.CORBA.COMM_FAILURE e) { |
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// failed to talk to filter, lets signal an error |
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send("ERROR"); |
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throw new IOException("error communicating with filter - " + e); |
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} |
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} |
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else { |
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// ...or throw a wobbly (and tell the host!) |
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send("ERROR"); |
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throw new IOException("unable to find filter for host"); |
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} |
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|
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} |
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else { |
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// send info |
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_socketOut.println(myConfig.getLastModified()); |
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_socketOut.flush(); |
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} |
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|
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// get config fileList |
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inBound = _socketIn.readLine(); |
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if(!inBound.equals("FILELIST")) { |
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// protocol error |
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_socketOut.println("ERROR"); |
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_socketOut.flush(); |
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throw new IOException("protocol error - expected:FILELIST got:" + inBound); |
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} |
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else { |
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// send info |
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_socketOut.println(myConfig.getFileList()); |
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_socketOut.flush(); |
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} |
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|
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// get properties |
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inBound = _socketIn.readLine(); |
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while(!inBound.equals("ENDCONFIG")) { |
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|
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// get the property |
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else if(cmd.equals("CHECKCONFIG")) { |
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// respond to CHECKCONFIG |
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send("OK"); |
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|
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// try for {filelist} |
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String filelist = getInBound(); |
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send("OK"); |
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|
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// try for {lastModified} |
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String lastModified = getInBound(); |
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long lastmod; |
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try { |
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String returnedProperty = myConfig.getProperty("Host."+inBound); |
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|
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_socketOut.println(returnedProperty); |
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_socketOut.flush(); |
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|
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} catch (org.omg.CORBA.MARSHAL e) { |
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_socketOut.println("ERROR"); |
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_socketOut.flush(); |
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lastmod = Long.parseLong(lastModified); |
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} |
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inBound = _socketIn.readLine(); |
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catch(NumberFormatException e) { |
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send("ERROR"); |
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throw new IOException("Last Modified invalid: " + e); |
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} |
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|
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// check to see if a config update has happen |
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boolean newConfig = _configManager.isModified(filelist, lastmod); |
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if(newConfig) { |
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// new config ! |
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send("EXPIRED"); |
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} |
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else { |
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// nothing has changed |
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send("OK"); |
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} |
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} |
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_logRef.write(toString(), Logger.SYSMSG, "configured host"); |
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_socketOut.println("OK"); |
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_socketOut.flush(); |
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– |
|
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// get filter reference |
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inBound = _socketIn.readLine(); |
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if(!inBound.equals("FILTER")) { |
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// protocol error |
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_socketOut.println("ERROR"); |
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_socketOut.flush(); |
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throw new IOException("protocol error - expected:FILTER got:" + inBound); |
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– |
} |
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else { |
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// send info |
123 |
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String parentFilter = myConfig.getProperty("Host.filter"); |
124 |
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_logRef.write(toString(), Logger.DEBUG, " looking for parent - " + parentFilter); |
125 |
< |
org.omg.CORBA.Object objRef = _ncRef.resolve(_ncRef.to_name("iscream.Filter." + parentFilter)); |
126 |
< |
Filter filter = FilterHelper.narrow(objRef); |
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< |
_socketOut.println(filter.getHostName() + ";" |
128 |
< |
+ filter.getUDPPort() + ";" |
129 |
< |
+ filter.getTCPPort()); |
130 |
< |
_socketOut.flush(); |
193 |
> |
send("ERROR"); |
194 |
|
} |
195 |
< |
|
196 |
< |
// confirm that all is ok |
134 |
< |
inBound = _socketIn.readLine(); |
135 |
< |
if(!inBound.equals("END")) { |
136 |
< |
// protocol error |
137 |
< |
_socketOut.println("ERROR"); |
138 |
< |
_socketOut.flush(); |
139 |
< |
throw new IOException("protocol error - expected:END got:" + inBound); |
140 |
< |
} |
141 |
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else { |
142 |
< |
// send ok |
143 |
< |
_socketOut.println("OK"); |
144 |
< |
_socketOut.flush(); |
145 |
< |
} |
146 |
< |
|
195 |
> |
// get the next command |
196 |
> |
cmd = getInBound(); |
197 |
|
} |
198 |
+ |
// respond to END |
199 |
+ |
send("OK"); |
200 |
|
|
201 |
|
} catch (Exception e) { |
202 |
< |
_logRef.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage()); |
202 |
> |
_logger.write(toString(), Logger.ERROR, "ERROR - " + e); |
203 |
|
} |
204 |
|
|
153 |
– |
_socketOut.flush(); |
205 |
|
// Disconnect streams & socket |
206 |
|
try { |
207 |
|
_socketIn.close(); |
208 |
|
_socketOut.close(); |
209 |
|
_socket.close(); |
210 |
|
} catch (IOException e) { |
211 |
< |
_logRef.write(toString(), Logger.ERROR, "exception on socket close"); |
211 |
> |
_logger.write(toString(), Logger.ERROR, "exception on socket close"); |
212 |
|
} |
213 |
< |
_logRef.write(toString(), Logger.SYSMSG, "finished"); |
213 |
> |
_logger.write(toString(), Logger.SYSMSG, "finished"); |
214 |
|
} |
215 |
|
|
216 |
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/** |
217 |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
218 |
|
* method to provide clean logging (every class should have this). |
219 |
|
* |
220 |
+ |
* This uses the uk.org.iscream.cms.util.NameFormat class |
221 |
+ |
* to format the toString() |
222 |
+ |
* |
223 |
|
* @return the name of this class and its CVS revision |
224 |
|
*/ |
225 |
|
public String toString() { |
226 |
< |
return this.getClass().getName() + "{" + _socket.getInetAddress().getHostName() |
227 |
< |
+ "}(" + REVISION.substring(11, REVISION.length() - 2) + ")"; |
228 |
< |
|
226 |
> |
return FormatName.getName( |
227 |
> |
_name, |
228 |
> |
getClass().getName(), |
229 |
> |
REVISION); |
230 |
|
} |
231 |
|
|
232 |
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//---PRIVATE METHODS--- |
233 |
|
|
234 |
+ |
private String getInBound(String expected) throws IOException { |
235 |
+ |
// grab the input |
236 |
+ |
String inBound = getInBound(); |
237 |
+ |
// check if it's what we're expecting |
238 |
+ |
if(!inBound.equals(expected)) { |
239 |
+ |
send("ERROR"); |
240 |
+ |
throw new IOException("protocol error - expected:"+expected+" got:" + inBound); |
241 |
+ |
} |
242 |
+ |
// it should be ok then |
243 |
+ |
return inBound; |
244 |
+ |
} |
245 |
+ |
|
246 |
+ |
private String getInBound() throws IOException { |
247 |
+ |
// grab the input |
248 |
+ |
String inBound = _socketIn.readLine(); |
249 |
+ |
// check for null's, likely disconnection |
250 |
+ |
if(inBound == null) { |
251 |
+ |
throw new IOException("got null from host, maybe it died"); |
252 |
+ |
} |
253 |
+ |
// it's a valid message it seems |
254 |
+ |
return inBound; |
255 |
+ |
} |
256 |
+ |
|
257 |
+ |
/* Use this instead of println. println under windows terminates the lines |
258 |
+ |
* in \c\n which is not the expected result for the ihost client. |
259 |
+ |
*/ |
260 |
+ |
private void send(String data) { |
261 |
+ |
_socketOut.print(data + "\n"); |
262 |
+ |
_socketOut.flush(); |
263 |
+ |
} |
264 |
+ |
|
265 |
|
//---ACCESSOR/MUTATOR METHODS--- |
266 |
|
|
267 |
|
//---ATTRIBUTES--- |
268 |
|
|
269 |
< |
ConfigurationManager _configManager; |
270 |
< |
Logger _logRef; |
271 |
< |
Socket _socket; |
272 |
< |
BufferedReader _socketIn; |
273 |
< |
PrintWriter _socketOut; |
274 |
< |
NamingContextExt _ncRef; |
269 |
> |
/** |
270 |
> |
* This holds a reference to the |
271 |
> |
* system logger that is being used. |
272 |
> |
*/ |
273 |
> |
private Logger _logger = ReferenceManager.getInstance().getLogger(); |
274 |
> |
|
275 |
> |
/** |
276 |
> |
* A reference to the Configuration Manager the system is using |
277 |
> |
*/ |
278 |
> |
private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM(); |
279 |
> |
|
280 |
> |
/** |
281 |
> |
* This is the friendly identifier of the |
282 |
> |
* component this class is running in. |
283 |
> |
* eg, a Filter may be called "filter1", |
284 |
> |
* If this class does not have an owning |
285 |
> |
* component, a name from the configuration |
286 |
> |
* can be placed here. This name could also |
287 |
> |
* be changed to null for utility classes. |
288 |
> |
*/ |
289 |
> |
private String _name = FilterManager.NAME; |
290 |
> |
|
291 |
> |
/** |
292 |
> |
* The socket this class uses |
293 |
> |
*/ |
294 |
> |
private Socket _socket; |
295 |
> |
|
296 |
> |
/** |
297 |
> |
* Used for the input stream of this socket |
298 |
> |
*/ |
299 |
> |
private BufferedReader _socketIn; |
300 |
> |
|
301 |
> |
/** |
302 |
> |
* Used for the output stream of this socket |
303 |
> |
*/ |
304 |
> |
private PrintWriter _socketOut; |
305 |
> |
|
306 |
|
//---STATIC ATTRIBUTES--- |
307 |
|
|
308 |
|
} |