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: ajm4 $
 * @version $Id: HostInit.java,v 1.13 2000/12/12 20:43:21 ajm4 Exp $
 */
class HostInit extends Thread {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.13 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

    public HostInit(Socket socket) throws IOException {
        _socket = socket;
        _socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
        _socketOut = new PrintWriter(_socket.getOutputStream());
        _logger.write(toString(), Logger.SYSINIT, "created");
    }
    
//---PUBLIC METHODS---

    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:	1.14
Committed:	Thu Jan 18 23:15:09 2001 UTC (23 years, 4 months ago) by tdb
Branch:	MAIN
Changes since 1.13:	+3 -2 lines
Log Message:	Changes to reflect move of Component, ComponentStartException, and the ReferenceManager from util to componentmanager.
#	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	ajm	1.13	* @author $Author: ajm4 $
18	tdb	1.14	* @version $Id: HostInit.java,v 1.13 2000/12/12 20:43:21 ajm4 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	1.14	public final String REVISION = "$Revision: 1.13 $";
28	tdb	1.1
29			//---STATIC METHODS---
30
31			//---CONSTRUCTORS---
32
33	tdb	1.11	public HostInit(Socket socket) throws IOException {
34	tdb	1.1	_socket = socket;
35			_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
36			_socketOut = new PrintWriter(_socket.getOutputStream());
37	tdb	1.11	_logger.write(toString(), Logger.SYSINIT, "created");
38	tdb	1.1	}
39
40			//---PUBLIC METHODS---
41
42			public void run() {
43			try {
44			String inBound = _socketIn.readLine();
45			if (!inBound.equals("STARTCONFIG")) {
46			_socketOut.println("ERROR");
47			_socketOut.flush();
48	tdb	1.7	throw new IOException("protocol error - expected:STARTCONFIG got:" + inBound);
49	tdb	1.1	}
50
51	ajm	1.8	Configuration myConfig = _configManager.getConfiguration("Host." + _socket.getInetAddress().getHostName().toLowerCase());
52	tdb	1.1	if (myConfig == null) {
53			_socketOut.println("ERROR");
54	tdb	1.7	throw new IOException("error in host configuration");
55	tdb	1.1	} else {
56			_socketOut.println("OK");
57			_socketOut.flush();
58
59	tdb	1.2	// get lastmodified
60			inBound = _socketIn.readLine();
61	tdb	1.4	if(!inBound.equals("LASTMODIFIED")) {
62			// protocol error
63	tdb	1.2	_socketOut.println("ERROR");
64			_socketOut.flush();
65	tdb	1.7	throw new IOException("protocol error - expected:LASTMODIFIED got:" + inBound);
66	tdb	1.4	}
67			else {
68			// send info
69			_socketOut.println(myConfig.getLastModified());
70			_socketOut.flush();
71	tdb	1.2	}
72
73	tdb	1.7	// get config fileList
74			inBound = _socketIn.readLine();
75			if(!inBound.equals("FILELIST")) {
76			// protocol error
77			_socketOut.println("ERROR");
78			_socketOut.flush();
79			throw new IOException("protocol error - expected:FILELIST got:" + inBound);
80			}
81			else {
82			// send info
83			_socketOut.println(myConfig.getFileList());
84			_socketOut.flush();
85			}
86
87	tdb	1.2	// get properties
88	tdb	1.1	inBound = _socketIn.readLine();
89			while(!inBound.equals("ENDCONFIG")) {
90
91			// get the property
92			try {
93	tdb	1.10	String returnedProperty = myConfig.getProperty("Host."+inBound);
94	tdb	1.1
95			_socketOut.println(returnedProperty);
96			_socketOut.flush();
97
98			} catch (org.omg.CORBA.MARSHAL e) {
99			_socketOut.println("ERROR");
100			_socketOut.flush();
101			}
102			inBound = _socketIn.readLine();
103			}
104	tdb	1.11	_logger.write(toString(), Logger.SYSMSG, "configured host");
105	tdb	1.1	_socketOut.println("OK");
106			_socketOut.flush();
107	tdb	1.7
108			// get filter reference
109			inBound = _socketIn.readLine();
110			if(!inBound.equals("FILTER")) {
111			// protocol error
112			_socketOut.println("ERROR");
113			_socketOut.flush();
114			throw new IOException("protocol error - expected:FILTER got:" + inBound);
115			}
116			else {
117			// send info
118			String parentFilter = myConfig.getProperty("Host.filter");
119	tdb	1.11	_logger.write(toString(), Logger.DEBUG, " looking for parent - " + parentFilter);
120			Filter filter = FilterHelper.narrow(ReferenceManager.getInstance().getCORBARef("iscream.Filter." + parentFilter));
121	tdb	1.7	_socketOut.println(filter.getHostName() + ";"
122			+ filter.getUDPPort() + ";"
123			+ filter.getTCPPort());
124			_socketOut.flush();
125			}
126
127			// confirm that all is ok
128			inBound = _socketIn.readLine();
129			if(!inBound.equals("END")) {
130			// protocol error
131			_socketOut.println("ERROR");
132			_socketOut.flush();
133			throw new IOException("protocol error - expected:END got:" + inBound);
134			}
135			else {
136			// send ok
137			_socketOut.println("OK");
138			_socketOut.flush();
139			}
140
141	tdb	1.1	}
142
143			} catch (Exception e) {
144	ajm	1.12	_logger.write(toString(), Logger.ERROR, "ERROR - " + e.getMessage());
145	tdb	1.1	}
146
147			_socketOut.flush();
148			// Disconnect streams & socket
149			try {
150			_socketIn.close();
151			_socketOut.close();
152			_socket.close();
153			} catch (IOException e) {
154	tdb	1.11	_logger.write(toString(), Logger.ERROR, "exception on socket close");
155	tdb	1.1	}
156	tdb	1.11	_logger.write(toString(), Logger.SYSMSG, "finished");
157	tdb	1.1	}
158
159			/**
160			* Overrides the {@link java.lang.Object#toString() Object.toString()}
161			* method to provide clean logging (every class should have this).
162			*
163	ajm	1.12	* This uses the uk.ac.ukc.iscream.util.NameFormat class
164			* to format the toString()
165			*
166	tdb	1.1	* @return the name of this class and its CVS revision
167			*/
168			public String toString() {
169	ajm	1.12	return FormatName.getName(
170			_name,
171	ajm	1.13	getClass().getName(),
172	ajm	1.12	REVISION);
173	tdb	1.1	}
174
175			//---PRIVATE METHODS---
176
177			//---ACCESSOR/MUTATOR METHODS---
178
179			//---ATTRIBUTES---
180
181	tdb	1.11	/**
182	ajm	1.12	* This holds a reference to the
183			* system logger that is being used.
184	tdb	1.11	*/
185	ajm	1.12	private Logger _logger = ReferenceManager.getInstance().getLogger();
186	tdb	1.11
187			/**
188			* A reference to the Configuration Manager the system is using
189			*/
190	ajm	1.12	private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
191
192			/**
193			* This is the friendly identifier of the
194			* component this class is running in.
195			* eg, a Filter may be called "filter1",
196			* If this class does not have an owning
197			* component, a name from the configuration
198			* can be placed here. This name could also
199			* be changed to null for utility classes.
200			*/
201			private String _name = FilterManager.NAME;
202
203			/**
204			* The socket this class uses
205			*/
206			private Socket _socket;
207
208			/**
209			* Used for the input stream of this socket
210			*/
211			private BufferedReader _socketIn;
212	tdb	1.11
213	ajm	1.12	/**
214			* Used for the output stream of this socket
215			*/
216			private PrintWriter _socketOut;
217	tdb	1.11
218	tdb	1.1	//---STATIC ATTRIBUTES---
219
220			}