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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/filtermanager/HostInit.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/filtermanager/HostInit.java (file contents):
Revision 1.9 by tdb, Wed Nov 29 19:19:12 2000 UTC vs.
Revision 1.26 by tdb, Tue Mar 13 13:40:26 2001 UTC

#	Line 4 | Line 4 | package uk.ac.ukc.iscream.filtermanager;
4		//---IMPORTS---
5		import uk.ac.ukc.iscream.core.*;
6		import uk.ac.ukc.iscream.filter.*;
7	<	import java.net.Socket;
8	<	import java.io.InputStream;
9	<	import java.io.OutputStream;
10	<	import java.io.IOException;
7	>	import uk.ac.ukc.iscream.util.*;
8	>	import uk.ac.ukc.iscream.componentmanager.*;
9	>	import java.net.*;
10		import java.io.*;
11	<	import org.omg.CORBA.*;
13	<	import org.omg.CosNaming.*;
11	>	import java.util.*;
12
13		/**
14	<	* <ONE LINE DESCRIPTION>
15	<	* <DETAILED DESCRIPTION>
14	>	* Handles setting up a host.
15	>	* This class provides a host with appropriate configuration
16	>	* and a reference to a Filter to which it should pass data.
17		*
18		* @author  $Author$
19		* @version $Id$
#	Line 32 | Line 31 | class HostInit extends Thread {
31
32		//---CONSTRUCTORS---
33
34	<	public HostInit(Socket socket, ConfigurationManager configManager, Logger logRef, NamingContextExt ncRef) throws IOException {
35	<	_configManager = configManager;
36	<	_logRef = logRef;
34	>	/**
35	>	* Construct a new HostInit.
36	>	*
37	>	* @param socket The socket to which the host is connected
38	>	*/
39	>	public HostInit(Socket socket) throws IOException {
40	>	// set the Thread name
41	>	setName("filtermanager.HostInit");
42	>
43		_socket = socket;
44	<	_ncRef = ncRef;
44	>	// setup reader & writer
45		_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
46	<	_socketOut = new PrintWriter(_socket.getOutputStream());
47	<	_logRef.write(toString(), Logger.SYSINIT, "created");
46	>	_socketOut = new PrintWriter(_socket.getOutputStream(), true);
47	>	_logger.write(toString(), Logger.SYSINIT, "created");
48		}
49
50		//---PUBLIC METHODS---
51
52	+	/**
53	+	* Main method in this class, which handles communicating with
54	+	* the host to determine it's setup.
55	+	*/
56		public void run() {
57	+	// get a hook on the config proxy
58	+	ConfigurationProxy cp = ConfigurationProxy.getInstance();
59	+	// this is our config name
60	+	String configName = "Host." + _socket.getInetAddress().getHostName().toLowerCase();
61		try {
62	<	String inBound = _socketIn.readLine();
63	<	if (!inBound.equals("STARTCONFIG")) {
64	<	_socketOut.println("ERROR");
65	<	_socketOut.flush();
66	<	throw new IOException("protocol error - expected:STARTCONFIG got:" + inBound);
67	<	}
68	<
69	<	Configuration myConfig = _configManager.getConfiguration("Host." + _socket.getInetAddress().getHostName().toLowerCase());
70	<	if (myConfig == null) {
71	<	_socketOut.println("ERROR");
72	<	throw new IOException("error in host configuration");
73	<	} else {
74	<	_socketOut.println("OK");
75	<	_socketOut.flush();
76	<
77	<	// get lastmodified
78	<	inBound = _socketIn.readLine();
79	<	if(!inBound.equals("LASTMODIFIED")) {
80	<	// protocol error
62	>	// try for STARTCONFIG
63	>	getInBound("STARTCONFIG");
64	>	_socketOut.println("OK");
65	>
66	>	// try for LASTMODIFIED
67	>	getInBound("LASTMODIFIED");
68	>	_socketOut.println(cp.getLastModified(configName));
69	>
70	>	// try for FILELIST
71	>	getInBound("FILELIST");
72	>	_socketOut.println(cp.getFileList(configName));
73	>
74	>	// try for FQDN
75	>	getInBound("FQDN");
76	>	_socketOut.println(_socket.getInetAddress().getHostName().toLowerCase());
77	>
78	>	// get properties
79	>	String reqProperty = getInBound();
80	>	while(!reqProperty.equals("ENDCONFIG")) {
81	>	// get the property
82	>	try {
83	>	String returnedProperty = cp.getProperty(configName, "Host."+reqProperty);
84	>	_socketOut.println(returnedProperty);
85	>	} catch (PropertyNotFoundException e) {
86		_socketOut.println("ERROR");
69	–	_socketOut.flush();
70	–	throw new IOException("protocol error - expected:LASTMODIFIED got:" + inBound);
87		}
88	<	else {
89	<	// send info
90	<	_socketOut.println(myConfig.getLastModified());
91	<	_socketOut.flush();
88	>	// get the next request
89	>	reqProperty = _socketIn.readLine();
90	>	}
91	>	_logger.write(toString(), Logger.SYSMSG, "configured host");
92	>	_socketOut.println("OK");
93	>
94	>	// get filter reference
95	>	getInBound("FILTER");
96	>	// send info
97	>	String filterList = cp.getProperty(configName, "Host.filter");
98	>	Filter filterRef = null;
99	>	String filter = null;
100	>	StringTokenizer st = new StringTokenizer(filterList, ";");
101	>	while (filterRef==null && st.hasMoreTokens()) {
102	>	filter = st.nextToken();
103	>	_logger.write(toString(), Logger.DEBUG, " looking for filter- " + filter);
104	>	try {
105	>	filterRef = FilterHelper.narrow(ReferenceManager.getInstance().getCORBARef("iscream.Filter." + filter));
106	>	} catch (ComponentCORBAException e) {
107	>	_logger.write(toString(), Logger.DEBUG, " unable to find filter- " + filter);
108		}
77	–
78	–	// get config fileList
79	–	inBound = _socketIn.readLine();
80	–	if(!inBound.equals("FILELIST")) {
81	–	// protocol error
82	–	_socketOut.println("ERROR");
83	–	_socketOut.flush();
84	–	throw new IOException("protocol error - expected:FILELIST got:" + inBound);
85	–	}
86	–	else {
87	–	// send info
88	–	_socketOut.println(myConfig.getFileList());
89	–	_socketOut.flush();
90	–	}
91	–
92	–	// get properties
93	–	inBound = _socketIn.readLine();
94	–	while(!inBound.equals("ENDCONFIG")) {
95	–
96	–	// get the property
97	–	try {
98	–	String returnedProperty = myConfig.getProperty(inBound);
99	–
100	–	_socketOut.println(returnedProperty);
101	–	_socketOut.flush();
102	–
103	–	} catch (org.omg.CORBA.MARSHAL e) {
104	–	_socketOut.println("ERROR");
105	–	_socketOut.flush();
106	–	}
107	–	inBound = _socketIn.readLine();
108	–	}
109	–	_logRef.write(toString(), Logger.SYSMSG, "configured host");
110	–	_socketOut.println("OK");
111	–	_socketOut.flush();
112	–
113	–	// get filter reference
114	–	inBound = _socketIn.readLine();
115	–	if(!inBound.equals("FILTER")) {
116	–	// protocol error
117	–	_socketOut.println("ERROR");
118	–	_socketOut.flush();
119	–	throw new IOException("protocol error - expected:FILTER got:" + inBound);
120	–	}
121	–	else {
122	–	// send info
123	–	String parentFilter =  myConfig.getProperty("Host.filter");
124	–	_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);
127	–	_socketOut.println(filter.getHostName() + ";"
128	–	+ filter.getUDPPort() + ";"
129	–	+ filter.getTCPPort());
130	–	_socketOut.flush();
131	–	}
132	–
133	–	// 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	–	else {
142	–	// send ok
143	–	_socketOut.println("OK");
144	–	_socketOut.flush();
145	–	}
146	–
109		}
110	+
111	+	// hopefully we found a filter
112	+	if(filterRef != null) {
113	+	_logger.write(toString(), Logger.DEBUG, " found filter- " + filter);
114	+	// tell the host about it...
115	+	_socketOut.println(filterRef.getHostName() + ";"
116	+	+ filterRef.getUDPPort() + ";"
117	+	+ filterRef.getTCPPort());
118	+	}
119	+	else {
120	+	// ...or throw a wobbly (and tell the host!)
121	+	_socketOut.println("ERROR");
122	+	throw new IOException("unable to find filter for host");
123	+	}
124
125	+	// confirm ok with END
126	+	getInBound("END");
127	+	_socketOut.println("OK");
128	+
129		} catch (Exception e) {
130	<	_logRef.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage());
130	>	_logger.write(toString(), Logger.ERROR, "ERROR - " + e);
131		}
132
153	–	_socketOut.flush();
133		// Disconnect streams & socket
134		try {
135		_socketIn.close();
136		_socketOut.close();
137		_socket.close();
138		} catch (IOException e) {
139	<	_logRef.write(toString(), Logger.ERROR, "exception on socket close");
139	>	_logger.write(toString(), Logger.ERROR, "exception on socket close");
140		}
141	<	_logRef.write(toString(), Logger.SYSMSG, "finished");
141	>	_logger.write(toString(), Logger.SYSMSG, "finished");
142		}
143
144		/**
145		* Overrides the {@link java.lang.Object#toString() Object.toString()}
146		* method to provide clean logging (every class should have this).
147		*
148	+	* This uses the uk.ac.ukc.iscream.util.NameFormat class
149	+	* to format the toString()
150	+	*
151		* @return the name of this class and its CVS revision
152		*/
153		public String toString() {
154	<	return this.getClass().getName() + "{" + _socket.getInetAddress().getHostName()
155	<	+ "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
156	<
154	>	return FormatName.getName(
155	>	_name,
156	>	getClass().getName(),
157	>	REVISION);
158		}
159
160		//---PRIVATE METHODS---
161
162	+	private String getInBound(String expected) throws IOException {
163	+	// grab the input
164	+	String inBound = getInBound();
165	+	// check if it's what we're expecting
166	+	if(!inBound.equals(expected)) {
167	+	throw new IOException("protocol error - expected:"+expected+" got:" + inBound);
168	+	}
169	+	// it should be ok then
170	+	return inBound;
171	+	}
172	+
173	+	private String getInBound() throws IOException {
174	+	// grab the input
175	+	String inBound = _socketIn.readLine();
176	+	// check for null's, likely disconnection
177	+	if(inBound == null) {
178	+	throw new IOException("got null from host, maybe it died");
179	+	}
180	+	// it's a valid message it seems
181	+	return inBound;
182	+	}
183	+
184		//---ACCESSOR/MUTATOR METHODS---
185
186		//---ATTRIBUTES---
187
188	<	ConfigurationManager _configManager;
189	<	Logger _logRef;
190	<	Socket _socket;
191	<	BufferedReader _socketIn;
192	<	PrintWriter _socketOut;
193	<	NamingContextExt _ncRef;
188	>	/**
189	>	* This holds a reference to the
190	>	* system logger that is being used.
191	>	*/
192	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
193	>
194	>	/**
195	>	* A reference to the Configuration Manager the system is using
196	>	*/
197	>	private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
198	>
199	>	/**
200	>	* This is the friendly identifier of the
201	>	* component this class is running in.
202	>	* eg, a Filter may be called "filter1",
203	>	* If this class does not have an owning
204	>	* component,  a name from the configuration
205	>	* can be placed here.  This name could also
206	>	* be changed to null for utility classes.
207	>	*/
208	>	private String _name = FilterManager.NAME;
209	>
210	>	/**
211	>	* The socket this class uses
212	>	*/
213	>	private Socket _socket;
214	>
215	>	/**
216	>	* Used for the input stream of this socket
217	>	*/
218	>	private BufferedReader _socketIn;
219	>
220	>	/**
221	>	* Used for the output stream of this socket
222	>	*/
223	>	private PrintWriter _socketOut;
224	>
225		//---STATIC ATTRIBUTES---
226
227		}

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