server/filtermanager/HostInit.java

//---PACKAGE DECLARATION---
package uk.ac.ukc.iscream.filtermanager;

//---IMPORTS---
import uk.ac.ukc.iscream.core.*;
import uk.ac.ukc.iscream.filter.*;
import uk.ac.ukc.iscream.util.*;
import uk.ac.ukc.iscream.componentmanager.*;
import java.net.Socket;
import java.io.*;

/**
 * Handles setting up a host.
 * This class provides a host with appropriate configuration
 * and a reference to a Filter to which it should pass data.
 *
 * @author  $Author: tdb1 $
 * @version $Id: HostInit.java,v 1.14 2001/01/18 23:15:09 tdb1 Exp $
 */
class HostInit extends Thread {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.14 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

    /**
     * Construct a new HostInit.
     *
     * @param socket The socket to which the host is connected
     */
    public HostInit(Socket socket) throws IOException {
        _socket = socket;
        // setup reader & writer
        _socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
        _socketOut = new PrintWriter(_socket.getOutputStream());
        _logger.write(toString(), Logger.SYSINIT, "created");
    }
    
//---PUBLIC METHODS---

    /**
     * Main method in this class, which handles communicating with
     * the host to determine it's setup.
     */
    public void run() {
        try {
            String inBound = _socketIn.readLine();
            if (!inBound.equals("STARTCONFIG")) {
                _socketOut.println("ERROR");
                _socketOut.flush();
                throw new IOException("protocol error - expected:STARTCONFIG got:" + inBound);
            }

            Configuration myConfig = _configManager.getConfiguration("Host." + _socket.getInetAddress().getHostName().toLowerCase());
            if (myConfig == null) {
                _socketOut.println("ERROR");
                throw new IOException("error in host configuration");
            } else {
                _socketOut.println("OK");
                _socketOut.flush();
                
                // get lastmodified
                inBound = _socketIn.readLine();
                if(!inBound.equals("LASTMODIFIED")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    _socketOut.flush();
                    throw new IOException("protocol error - expected:LASTMODIFIED got:" + inBound);
                }
                else {
                        // send info
                        _socketOut.println(myConfig.getLastModified());
                        _socketOut.flush();
                }
                
                // get config fileList
                inBound = _socketIn.readLine();
                if(!inBound.equals("FILELIST")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    _socketOut.flush();
                    throw new IOException("protocol error - expected:FILELIST got:" + inBound);
                }
                else {
                        // send info
                        _socketOut.println(myConfig.getFileList());
                        _socketOut.flush();
                }

                // get properties
                inBound = _socketIn.readLine();
                while(!inBound.equals("ENDCONFIG")) {
                          
                    // get the property
                    try {
                        String returnedProperty = myConfig.getProperty("Host."+inBound);    
                        
                        _socketOut.println(returnedProperty);
                        _socketOut.flush();
    
                    } catch (org.omg.CORBA.MARSHAL e) {
                        _socketOut.println("ERROR");
                        _socketOut.flush();
                    }
                    inBound = _socketIn.readLine();
                }
                _logger.write(toString(), Logger.SYSMSG, "configured host");
                _socketOut.println("OK");
                _socketOut.flush();
                
                // get filter reference
                inBound = _socketIn.readLine();
                if(!inBound.equals("FILTER")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    _socketOut.flush();
                    throw new IOException("protocol error - expected:FILTER got:" + inBound);
                }
                else {
                        // send info
                        String parentFilter =  myConfig.getProperty("Host.filter");
                        _logger.write(toString(), Logger.DEBUG, " looking for parent - " + parentFilter);
                    Filter filter = FilterHelper.narrow(ReferenceManager.getInstance().getCORBARef("iscream.Filter." + parentFilter));
                        _socketOut.println(filter.getHostName() + ";"
                                         + filter.getUDPPort() + ";"
                                         + filter.getTCPPort());
                        _socketOut.flush();
                }
                
                // confirm that all is ok
                inBound = _socketIn.readLine();
                if(!inBound.equals("END")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    _socketOut.flush();
                    throw new IOException("protocol error - expected:END got:" + inBound);
                }
                else {
                        // send ok
                        _socketOut.println("OK");
                        _socketOut.flush();
                }

            }
            
        } catch (Exception e) {
            _logger.write(toString(), Logger.ERROR, "ERROR - " + e.getMessage());
        }
        
        _socketOut.flush();
        // Disconnect streams & socket
        try {
            _socketIn.close();
            _socketOut.close();
            _socket.close();
        } catch (IOException e) {
            _logger.write(toString(), Logger.ERROR, "exception on socket close");
        }
        _logger.write(toString(), Logger.SYSMSG, "finished");
    }
    
    /**
     * Overrides the {@link java.lang.Object#toString() Object.toString()}
     * method to provide clean logging (every class should have this).
     *
     * This uses the uk.ac.ukc.iscream.util.NameFormat class
     * to format the toString()
     *
     * @return the name of this class and its CVS revision
     */
    public String toString() {
        return FormatName.getName(
            _name,
            getClass().getName(),
            REVISION);
    }

//---PRIVATE METHODS---

//---ACCESSOR/MUTATOR METHODS---

//---ATTRIBUTES---

    /**
     * This holds a reference to the
     * system logger that is being used.
     */
    private Logger _logger = ReferenceManager.getInstance().getLogger();
    
    /**
     * A reference to the Configuration Manager the system is using
     */
    private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
    
    /**
     * This is the friendly identifier of the
     * component this class is running in.
     * eg, a Filter may be called "filter1",
     * If this class does not have an owning
     * component,  a name from the configuration
     * can be placed here.  This name could also
     * be changed to null for utility classes.
     */
    private String _name = FilterManager.NAME;
    
    /** 
     * The socket this class uses
     */
    private Socket _socket;

    /**
     * Used for the input stream of this socket
     */
    private BufferedReader _socketIn;
    
    /**
     * Used for the output stream of this socket
     */
    private PrintWriter _socketOut;

//---STATIC ATTRIBUTES---

}
Revision:	1.15
Committed:	Sun Jan 28 05:38:13 2001 UTC (23 years, 4 months ago) by tdb
Branch:	MAIN
Changes since 1.14:	+13 -3 lines
Log Message:	Some tidying up.
#	User	Rev	Content
1	tdb	1.1	//---PACKAGE DECLARATION---
2	tdb	1.9	package uk.ac.ukc.iscream.filtermanager;
3	tdb	1.1
4			//---IMPORTS---
5			import uk.ac.ukc.iscream.core.*;
6	tdb	1.7	import uk.ac.ukc.iscream.filter.*;
7	tdb	1.11	import uk.ac.ukc.iscream.util.*;
8	tdb	1.14	import uk.ac.ukc.iscream.componentmanager.*;
9	tdb	1.1	import java.net.Socket;
10			import java.io.*;
11
12			/**
13	tdb	1.11	* Handles setting up a host.
14	ajm	1.12	* This class provides a host with appropriate configuration
15			* and a reference to a Filter to which it should pass data.
16	tdb	1.1	*
17	tdb	1.15	* @author $Author: tdb1 $
18			* @version $Id: HostInit.java,v 1.14 2001/01/18 23:15:09 tdb1 Exp $
19	tdb	1.1	*/
20			class HostInit extends Thread {
21
22			//---FINAL ATTRIBUTES---
23
24			/**
25			* The current CVS revision of this class
26			*/
27	tdb	1.15	public final String REVISION = "$Revision: 1.14 $";
28	tdb	1.1
29			//---STATIC METHODS---
30
31			//---CONSTRUCTORS---
32
33	tdb	1.15	/**
34			* Construct a new HostInit.
35			*
36			* @param socket The socket to which the host is connected
37			*/
38	tdb	1.11	public HostInit(Socket socket) throws IOException {
39	tdb	1.1	_socket = socket;
40	tdb	1.15	// setup reader & writer
41	tdb	1.1	_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
42			_socketOut = new PrintWriter(_socket.getOutputStream());
43	tdb	1.11	_logger.write(toString(), Logger.SYSINIT, "created");
44	tdb	1.1	}
45
46			//---PUBLIC METHODS---
47
48	tdb	1.15	/**
49			* Main method in this class, which handles communicating with
50			* the host to determine it's setup.
51			*/
52	tdb	1.1	public void run() {
53			try {
54			String inBound = _socketIn.readLine();
55			if (!inBound.equals("STARTCONFIG")) {
56			_socketOut.println("ERROR");
57			_socketOut.flush();
58	tdb	1.7	throw new IOException("protocol error - expected:STARTCONFIG got:" + inBound);
59	tdb	1.1	}
60
61	ajm	1.8	Configuration myConfig = _configManager.getConfiguration("Host." + _socket.getInetAddress().getHostName().toLowerCase());
62	tdb	1.1	if (myConfig == null) {
63			_socketOut.println("ERROR");
64	tdb	1.7	throw new IOException("error in host configuration");
65	tdb	1.1	} else {
66			_socketOut.println("OK");
67			_socketOut.flush();
68
69	tdb	1.2	// get lastmodified
70			inBound = _socketIn.readLine();
71	tdb	1.4	if(!inBound.equals("LASTMODIFIED")) {
72			// protocol error
73	tdb	1.2	_socketOut.println("ERROR");
74			_socketOut.flush();
75	tdb	1.7	throw new IOException("protocol error - expected:LASTMODIFIED got:" + inBound);
76	tdb	1.4	}
77			else {
78			// send info
79			_socketOut.println(myConfig.getLastModified());
80			_socketOut.flush();
81	tdb	1.2	}
82
83	tdb	1.7	// get config fileList
84			inBound = _socketIn.readLine();
85			if(!inBound.equals("FILELIST")) {
86			// protocol error
87			_socketOut.println("ERROR");
88			_socketOut.flush();
89			throw new IOException("protocol error - expected:FILELIST got:" + inBound);
90			}
91			else {
92			// send info
93			_socketOut.println(myConfig.getFileList());
94			_socketOut.flush();
95			}
96
97	tdb	1.2	// get properties
98	tdb	1.1	inBound = _socketIn.readLine();
99			while(!inBound.equals("ENDCONFIG")) {
100
101			// get the property
102			try {
103	tdb	1.10	String returnedProperty = myConfig.getProperty("Host."+inBound);
104	tdb	1.1
105			_socketOut.println(returnedProperty);
106			_socketOut.flush();
107
108			} catch (org.omg.CORBA.MARSHAL e) {
109			_socketOut.println("ERROR");
110			_socketOut.flush();
111			}
112			inBound = _socketIn.readLine();
113			}
114	tdb	1.11	_logger.write(toString(), Logger.SYSMSG, "configured host");
115	tdb	1.1	_socketOut.println("OK");
116			_socketOut.flush();
117	tdb	1.7
118			// get filter reference
119			inBound = _socketIn.readLine();
120			if(!inBound.equals("FILTER")) {
121			// protocol error
122			_socketOut.println("ERROR");
123			_socketOut.flush();
124			throw new IOException("protocol error - expected:FILTER got:" + inBound);
125			}
126			else {
127			// send info
128			String parentFilter = myConfig.getProperty("Host.filter");
129	tdb	1.11	_logger.write(toString(), Logger.DEBUG, " looking for parent - " + parentFilter);
130			Filter filter = FilterHelper.narrow(ReferenceManager.getInstance().getCORBARef("iscream.Filter." + parentFilter));
131	tdb	1.7	_socketOut.println(filter.getHostName() + ";"
132			+ filter.getUDPPort() + ";"
133			+ filter.getTCPPort());
134			_socketOut.flush();
135			}
136
137			// confirm that all is ok
138			inBound = _socketIn.readLine();
139			if(!inBound.equals("END")) {
140			// protocol error
141			_socketOut.println("ERROR");
142			_socketOut.flush();
143			throw new IOException("protocol error - expected:END got:" + inBound);
144			}
145			else {
146			// send ok
147			_socketOut.println("OK");
148			_socketOut.flush();
149			}
150
151	tdb	1.1	}
152
153			} catch (Exception e) {
154	ajm	1.12	_logger.write(toString(), Logger.ERROR, "ERROR - " + e.getMessage());
155	tdb	1.1	}
156
157			_socketOut.flush();
158			// Disconnect streams & socket
159			try {
160			_socketIn.close();
161			_socketOut.close();
162			_socket.close();
163			} catch (IOException e) {
164	tdb	1.11	_logger.write(toString(), Logger.ERROR, "exception on socket close");
165	tdb	1.1	}
166	tdb	1.11	_logger.write(toString(), Logger.SYSMSG, "finished");
167	tdb	1.1	}
168
169			/**
170			* Overrides the {@link java.lang.Object#toString() Object.toString()}
171			* method to provide clean logging (every class should have this).
172			*
173	ajm	1.12	* This uses the uk.ac.ukc.iscream.util.NameFormat class
174			* to format the toString()
175			*
176	tdb	1.1	* @return the name of this class and its CVS revision
177			*/
178			public String toString() {
179	ajm	1.12	return FormatName.getName(
180			_name,
181	ajm	1.13	getClass().getName(),
182	ajm	1.12	REVISION);
183	tdb	1.1	}
184
185			//---PRIVATE METHODS---
186
187			//---ACCESSOR/MUTATOR METHODS---
188
189			//---ATTRIBUTES---
190
191	tdb	1.11	/**
192	ajm	1.12	* This holds a reference to the
193			* system logger that is being used.
194	tdb	1.11	*/
195	ajm	1.12	private Logger _logger = ReferenceManager.getInstance().getLogger();
196	tdb	1.11
197			/**
198			* A reference to the Configuration Manager the system is using
199			*/
200	ajm	1.12	private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
201
202			/**
203			* This is the friendly identifier of the
204			* component this class is running in.
205			* eg, a Filter may be called "filter1",
206			* If this class does not have an owning
207			* component, a name from the configuration
208			* can be placed here. This name could also
209			* be changed to null for utility classes.
210			*/
211			private String _name = FilterManager.NAME;
212
213			/**
214			* The socket this class uses
215			*/
216			private Socket _socket;
217
218			/**
219			* Used for the input stream of this socket
220			*/
221			private BufferedReader _socketIn;
222	tdb	1.11
223	ajm	1.12	/**
224			* Used for the output stream of this socket
225			*/
226			private PrintWriter _socketOut;
227	tdb	1.11
228	tdb	1.1	//---STATIC ATTRIBUTES---
229
230			}