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.*;
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 1.19 2001/02/28 10:36:05 tdb1 Exp $
 */
class HostInit extends Thread {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.19 $";
    
//---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(), true);
        _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");
                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");
                
                // get lastmodified
                inBound = _socketIn.readLine();
                if(!inBound.equals("LASTMODIFIED")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    throw new IOException("protocol error - expected:LASTMODIFIED got:" + inBound);
                }
                else {
                        // send info
                        _socketOut.println(myConfig.getLastModified());
                }
                
                // get config fileList
                inBound = _socketIn.readLine();
                if(!inBound.equals("FILELIST")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    throw new IOException("protocol error - expected:FILELIST got:" + inBound);
                }
                else {
                        // send info
                        _socketOut.println(myConfig.getFileList());
                }
                
                // send the FQDN to the host
                inBound = _socketIn.readLine();
                if(!inBound.equals("FQDN")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    throw new IOException("protocol error - expected:FQDN got:" + inBound);
                }
                else {
                    // send the fqdn (of the host) to the host
                    _socketOut.println(_socket.getInetAddress().getHostName());
                }
                
                // get properties
                inBound = _socketIn.readLine();
                while(!inBound.equals("ENDCONFIG")) {
                          
                    // get the property
                    try {
                        String returnedProperty = myConfig.getProperty("Host."+inBound);    
                        
                        _socketOut.println(returnedProperty);
    
                    } catch (org.omg.CORBA.MARSHAL e) {
                        _socketOut.println("ERROR");
                    }
                    inBound = _socketIn.readLine();
                }
                _logger.write(toString(), Logger.SYSMSG, "configured host");
                _socketOut.println("OK");
                
                // get filter reference
                inBound = _socketIn.readLine();
                if(!inBound.equals("FILTER")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    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());
                }
                
                // confirm that all is ok
                inBound = _socketIn.readLine();
                if(!inBound.equals("END")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    throw new IOException("protocol error - expected:END got:" + inBound);
                }
                else {
                        // send ok
                        _socketOut.println("OK");
                }

            }
            
        } catch (Exception e) {
            _logger.write(toString(), Logger.ERROR, "ERROR - " + e);
        }
        
        _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:	1.20
Committed:	Wed Feb 28 10:37:46 2001 UTC (23 years, 2 months ago) by tdb
Branch:	MAIN
Changes since 1.19:	+4 -10 lines
Log Message:	Don't need to try/catch anymore.
#	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	1.18	import java.net.*;
10	tdb	1.1	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	tdb	1.20	* @version $Id: HostInit.java,v 1.19 2001/02/28 10:36:05 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	1.20	public final String REVISION = "$Revision: 1.19 $";
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	tdb	1.16	_socketOut = new PrintWriter(_socket.getOutputStream(), true);
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	tdb	1.7	throw new IOException("protocol error - expected:STARTCONFIG got:" + inBound);
58	tdb	1.1	}
59
60	ajm	1.8	Configuration myConfig = _configManager.getConfiguration("Host." + _socket.getInetAddress().getHostName().toLowerCase());
61	tdb	1.1	if (myConfig == null) {
62			_socketOut.println("ERROR");
63	tdb	1.7	throw new IOException("error in host configuration");
64	tdb	1.1	} else {
65			_socketOut.println("OK");
66
67	tdb	1.2	// get lastmodified
68			inBound = _socketIn.readLine();
69	tdb	1.4	if(!inBound.equals("LASTMODIFIED")) {
70			// protocol error
71	tdb	1.2	_socketOut.println("ERROR");
72	tdb	1.7	throw new IOException("protocol error - expected:LASTMODIFIED got:" + inBound);
73	tdb	1.4	}
74			else {
75			// send info
76			_socketOut.println(myConfig.getLastModified());
77	tdb	1.2	}
78
79	tdb	1.7	// get config fileList
80			inBound = _socketIn.readLine();
81			if(!inBound.equals("FILELIST")) {
82			// protocol error
83			_socketOut.println("ERROR");
84			throw new IOException("protocol error - expected:FILELIST got:" + inBound);
85			}
86			else {
87			// send info
88			_socketOut.println(myConfig.getFileList());
89			}
90	tdb	1.18
91			// send the FQDN to the host
92			inBound = _socketIn.readLine();
93			if(!inBound.equals("FQDN")) {
94			// protocol error
95			_socketOut.println("ERROR");
96			throw new IOException("protocol error - expected:FQDN got:" + inBound);
97			}
98			else {
99	tdb	1.20	// send the fqdn (of the host) to the host
100			_socketOut.println(_socket.getInetAddress().getHostName());
101	tdb	1.18	}
102
103	tdb	1.2	// get properties
104	tdb	1.1	inBound = _socketIn.readLine();
105			while(!inBound.equals("ENDCONFIG")) {
106
107			// get the property
108			try {
109	tdb	1.10	String returnedProperty = myConfig.getProperty("Host."+inBound);
110	tdb	1.1
111			_socketOut.println(returnedProperty);
112
113			} catch (org.omg.CORBA.MARSHAL e) {
114			_socketOut.println("ERROR");
115			}
116			inBound = _socketIn.readLine();
117			}
118	tdb	1.11	_logger.write(toString(), Logger.SYSMSG, "configured host");
119	tdb	1.1	_socketOut.println("OK");
120	tdb	1.7
121			// get filter reference
122			inBound = _socketIn.readLine();
123			if(!inBound.equals("FILTER")) {
124			// protocol error
125			_socketOut.println("ERROR");
126			throw new IOException("protocol error - expected:FILTER got:" + inBound);
127			}
128			else {
129			// send info
130			String parentFilter = myConfig.getProperty("Host.filter");
131	tdb	1.11	_logger.write(toString(), Logger.DEBUG, " looking for parent - " + parentFilter);
132			Filter filter = FilterHelper.narrow(ReferenceManager.getInstance().getCORBARef("iscream.Filter." + parentFilter));
133	tdb	1.7	_socketOut.println(filter.getHostName() + ";"
134			+ filter.getUDPPort() + ";"
135			+ filter.getTCPPort());
136			}
137
138			// confirm that all is ok
139			inBound = _socketIn.readLine();
140			if(!inBound.equals("END")) {
141			// protocol error
142			_socketOut.println("ERROR");
143			throw new IOException("protocol error - expected:END got:" + inBound);
144			}
145			else {
146			// send ok
147			_socketOut.println("OK");
148			}
149
150	tdb	1.1	}
151
152			} catch (Exception e) {
153	tdb	1.17	_logger.write(toString(), Logger.ERROR, "ERROR - " + e);
154	tdb	1.1	}
155
156			_socketOut.flush();
157			// Disconnect streams & socket
158			try {
159			_socketIn.close();
160			_socketOut.close();
161			_socket.close();
162			} catch (IOException e) {
163	tdb	1.11	_logger.write(toString(), Logger.ERROR, "exception on socket close");
164	tdb	1.1	}
165	tdb	1.11	_logger.write(toString(), Logger.SYSMSG, "finished");
166	tdb	1.1	}
167
168			/**
169			* Overrides the {@link java.lang.Object#toString() Object.toString()}
170			* method to provide clean logging (every class should have this).
171			*
172	ajm	1.12	* This uses the uk.ac.ukc.iscream.util.NameFormat class
173			* to format the toString()
174			*
175	tdb	1.1	* @return the name of this class and its CVS revision
176			*/
177			public String toString() {
178	ajm	1.12	return FormatName.getName(
179			_name,
180	ajm	1.13	getClass().getName(),
181	ajm	1.12	REVISION);
182	tdb	1.1	}
183
184			//---PRIVATE METHODS---
185
186			//---ACCESSOR/MUTATOR METHODS---
187
188			//---ATTRIBUTES---
189
190	tdb	1.11	/**
191	ajm	1.12	* This holds a reference to the
192			* system logger that is being used.
193	tdb	1.11	*/
194	ajm	1.12	private Logger _logger = ReferenceManager.getInstance().getLogger();
195	tdb	1.11
196			/**
197			* A reference to the Configuration Manager the system is using
198			*/
199	ajm	1.12	private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
200
201			/**
202			* This is the friendly identifier of the
203			* component this class is running in.
204			* eg, a Filter may be called "filter1",
205			* If this class does not have an owning
206			* component, a name from the configuration
207			* can be placed here. This name could also
208			* be changed to null for utility classes.
209			*/
210			private String _name = FilterManager.NAME;
211
212			/**
213			* The socket this class uses
214			*/
215			private Socket _socket;
216
217			/**
218			* Used for the input stream of this socket
219			*/
220			private BufferedReader _socketIn;
221	tdb	1.11
222	ajm	1.12	/**
223			* Used for the output stream of this socket
224			*/
225			private PrintWriter _socketOut;
226	tdb	1.11
227	tdb	1.1	//---STATIC ATTRIBUTES---
228
229			}