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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/filter/TCPReaderInit.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/filter/TCPReaderInit.java (file contents):
Revision 1.3 by tdb, Mon Nov 27 21:48:44 2000 UTC vs.
Revision 1.28 by tdb, Thu Mar 21 22:09:13 2002 UTC

#	Line 1 | Line 1
1		//---PACKAGE DECLARATION---
2	+	package uk.org.iscream.cms.server.filter;
3
4		//---IMPORTS---
5	<	import uk.ac.ukc.iscream.core.*;
6	<	import uk.ac.ukc.iscream.filter.*;
5	>	import uk.org.iscream.cms.server.core.*;
6	>	import uk.org.iscream.cms.server.filter.*;
7	>	import uk.org.iscream.cms.server.componentmanager.*;
8		import java.net.Socket;
7	–	import java.io.InputStream;
8	–	import java.io.OutputStream;
9	–	import java.io.IOException;
9		import java.io.*;
10	<	import org.omg.CORBA.*;
11	<	import org.omg.CosNaming.*;
10	>	import java.util.Random;
11	>	import uk.org.iscream.cms.server.util.*;
12
13		/**
14	<	* <ONE LINE DESCRIPTION>
16	<	* <DETAILED DESCRIPTION>
14	>	* This provides Host heartbeat functionality
15		*
16		* @author  $Author$
17		* @version $Id$
#	Line 30 | Line 28 | class TCPReaderInit extends Thread {
28		//---STATIC METHODS---
29
30		//---CONSTRUCTORS---
31	<
32	<	public TCPReaderInit(Socket socket, ConfigurationManager configManager, Logger logRef, Filter parent) throws IOException {
33	<	_configManager = configManager;
34	<	_logRef = logRef;
31	>
32	>	/**
33	>	* Construct a new TCPReaderInit.
34	>	*
35	>	* @param socket the Socket to which the host is connected
36	>	* @param queue the Queue to which we'll add data
37	>	* @throws IOException if something goes badly wrong
38	>	*/
39	>	public TCPReaderInit(Socket socket, Queue queue) throws IOException {
40	>	// set the Thread name
41	>	setName("filter.TCPReaderInit");
42	>
43		_socket = socket;
44	<	_parent = parent;
44	>	_queue = queue;
45	>	// setup the reader & writer
46		_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
47	<	_socketOut = new PrintWriter(_socket.getOutputStream());
48	<	_logRef.write(toString(), Logger.SYSINIT, "created");
47	>	_socketOut = new PrintWriter(_socket.getOutputStream(), true);
48	>	_logger.write(toString(), Logger.SYSINIT, "created");
49		}
50
51		//---PUBLIC METHODS---
52	<
53	<	//NEED TO MAJORILY CHANGE THIS BIT !
52	>
53	>	/**
54	>	* Main run method. Will communicate with the host, inform it
55	>	* if any updates to it's configuration are needed, and send
56	>	* a heartbeat packet into the system.
57	>	*/
58		public void run() {
59		try {
60	<	//variables
61	<	String filelist = "";
51	<	String lastModified = "";
52	<	String inBound = "";
60	>	// get an instance of the KeyManager
61	>	KeyManager keyman = KeyManager.getInstance();
62
63	<	inBound = _socketIn.readLine();
64	<	if(!inBound.equals("HEARTBEAT")) {
65	<	_socketOut.println("ERROR");
57	<	_socketOut.flush();
58	<	throw new IOException("protocol error - expecting:HEARTBEAT got:" + inBound);
59	<	} else {
60	<	_socketOut.println("OK");
61	<	_socketOut.flush();
62	<	}
63	>	// get some information about the host
64	>	String hostname = _socket.getInetAddress().getHostName().toLowerCase();
65	>	String ipadd = _socket.getInetAddress().getHostAddress();
66
67	<	inBound = _socketIn.readLine();
68	<	if(!inBound.equals("CONFIG")) {
69	<	_socketOut.println("ERROR");
70	<	_socketOut.flush();
71	<	throw new IOException("protocol error - expecting:CONFIG got:" + inBound);
72	<	} else {
73	<	_socketOut.println("OK");
74	<	_socketOut.flush();
67	>	// try for HEARTBEAT
68	>	getInBound("HEARTBEAT");
69	>	_socketOut.println("OK");
70	>
71	>	// look for a command:
72	>	// CONFIG - to check config
73	>	// KEY - to get the key
74	>	// ENDHEARTBEAT - to finish
75	>	String cmd = getInBound();
76	>	while(!cmd.equals("ENDHEARTBEAT")) {
77	>	if(cmd.equals("CONFIG")) {
78	>	// respond to CONFIG
79	>	_socketOut.println("OK");
80	>
81	>	// try for {filelist}
82	>	String filelist = getInBound();
83	>	_socketOut.println("OK");
84	>
85	>	// try for {lastModified}
86	>	String lastModified = getInBound();
87	>	// check to see if a config update has happen
88	>	boolean newConfig = _configManager.isModified(filelist, Long.parseLong(lastModified));
89	>	if(newConfig) {
90	>	// new config !
91	>	_socketOut.println("ERROR");
92	>	}
93	>	else {
94	>	// nothing has changed
95	>	_socketOut.println("OK");
96	>	}
97	>	}
98	>	else if(cmd.equals("KEY")) {
99	>	// repsond to KEY
100	>	// generate a key
101	>	String key = keyman.genKey();
102	>	// add it to the key manager
103	>	keyman.addKey(hostname, key);
104	>	_socketOut.println(key);
105	>	}
106	>	else {
107	>	_socketOut.println("ERROR");
108	>	}
109	>	// get the next command
110	>	cmd = getInBound();
111		}
112
113	<	inBound = _socketIn.readLine();
75	<	filelist = inBound;
113	>	// respond to ENDHEARTBEAT
114		_socketOut.println("OK");
77	–	_socketOut.flush();
115
116	<	inBound = _socketIn.readLine();
117	<	lastModified = inBound;
116	>	// work out some information for our heartbeat packet
117	>	String date = new Long(System.currentTimeMillis()/((long) 1000)).toString(); //seconds
118
119	<	boolean newConfig = _configManager.isModified(filelist, Long.parseLong(lastModified));
119	>	// run the service checks for this host
120	>	_logger.write(toString(), Logger.DEBUG, "Running service checks");
121	>	String checks = PluginServiceCheckManager.getInstance().runServiceChecks(hostname);
122
123	<	if(newConfig) {
124	<	_socketOut.println("ERROR");
86	<	}
87	<	else {
88	<	_socketOut.println("OK");
89	<	}
90	<	_socketOut.flush();
123	>	// build the heartbeat packet
124	>	String xml = "<packet type=\"heartbeat\" machine_name=\""+hostname+"\" date=\""+date+"\" ip=\""+ipadd+"\">" + checks + "</packet>";
125
126	<	inBound = _socketIn.readLine();
127	<	if(!inBound.equals("ENDHEARTBEAT")) {
94	<	_socketOut.println("ERROR");
95	<	_socketOut.flush();
96	<	throw new IOException("protocol error - expecting:ENDHEARTBEAT got:" + inBound);
97	<	} else {
98	<	_socketOut.println("OK");
99	<	_socketOut.flush();
100	<	}
126	>	// get it to be sent on
127	>	_queue.add(xml);
128
129		} catch (Exception e) {
130	<	_logRef.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage());
130	>	_logger.write(toString(), Logger.ERROR, "ERROR: " + e);
131		}
132
106	–	_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.DEBUG, "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.org.iscream.cms.server.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 from "+_socket.getInetAddress().getHostName()+" - 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;
188	>	/**
189	>	* A reference to the configuration manager
190	>	*/
191	>	ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
192	>
193	>	/**
194	>	* This is the friendly identifier of the
195	>	* component this class is running in.
196	>	* eg, a Filter may be called "filter1",
197	>	* If this class does not have an owning
198	>	* component,  a name from the configuration
199	>	* can be placed here.  This name could also
200	>	* be changed to null for utility classes.
201	>	*/
202	>	private String _name = FilterMain.NAME;
203	>
204	>	/**
205	>	* This holds a reference to the
206	>	* system logger that is being used.
207	>	*/
208	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
209	>
210	>	/**
211	>	* The socket we are talking on
212	>	*/
213		Socket _socket;
214	+
215	+	/**
216	+	* The input from the socket
217	+	*/
218		BufferedReader _socketIn;
219	+
220	+	/**
221	+	* The output from the socket
222	+	*/
223		PrintWriter _socketOut;
224	<	Filter _parent;
224	>
225	>	/**
226	>	* A reference to our Queue
227	>	*/
228	>	Queue _queue;
229	>
230		//---STATIC ATTRIBUTES---
231
232		}

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