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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 1.9 by ajm, Thu Nov 30 02:38:09 2000 UTC vs.
Revision 1.26 by tdb, Thu Mar 21 13:01:21 2002 UTC

#	Line 1 | Line 1
1		//---PACKAGE DECLARATION---
2	<	package uk.ac.ukc.iscream.filter;
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;
9		import java.io.InputStream;
10		import java.io.OutputStream;
11		import java.io.IOException;
12		import java.io.*;
13	<	import org.omg.CORBA.*;
13	<	import org.omg.CosNaming.*;
14	<	import uk.ac.ukc.iscream.util.*;
13	>	import uk.org.iscream.cms.server.util.*;
14
15		/**
16	<	* <ONE LINE DESCRIPTION>
18	<	* <DETAILED DESCRIPTION>
16	>	* This provides Host heartbeat functionality
17		*
18		* @author  $Author$
19		* @version $Id$
#	Line 32 | Line 30 | class TCPReaderInit extends Thread {
30		//---STATIC METHODS---
31
32		//---CONSTRUCTORS---
33	<
34	<	public TCPReaderInit(Socket socket, Filter parent) throws IOException {
33	>
34	>	/**
35	>	* Construct a new TCPReaderInit.
36	>	*
37	>	* @param socket the Socket to which the host is connected
38	>	* @param queue the Queue to which we'll add data
39	>	* @throws IOException if something goes badly wrong
40	>	*/
41	>	public TCPReaderInit(Socket socket, Queue queue) throws IOException {
42	>	// set the Thread name
43	>	setName("filter.TCPReaderInit");
44	>
45		_socket = socket;
46	<	_parent = parent;
46	>	_queue = queue;
47	>	// setup the reader & writer
48		_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
49	<	_socketOut = new PrintWriter(_socket.getOutputStream());
49	>	_socketOut = new PrintWriter(_socket.getOutputStream(), true);
50		_logger.write(toString(), Logger.SYSINIT, "created");
51		}
52
53		//---PUBLIC METHODS---
54	<
54	>
55	>	/**
56	>	* Main run method. Will communicate with the host, inform it
57	>	* if any updates to it's configuration are needed, and send
58	>	* a heartbeat packet into the system.
59	>	*/
60		public void run() {
61		try {
62		//variables
#	Line 50 | Line 64 | class TCPReaderInit extends Thread {
64		String lastModified = "";
65		String inBound = "";
66
67	<	inBound = _socketIn.readLine();
68	<	if(!inBound.equals("HEARTBEAT")) {
69	<	_socketOut.println("ERROR");
56	<	_socketOut.flush();
57	<	throw new IOException("protocol error - expecting:HEARTBEAT got:" + inBound);
58	<	} else {
59	<	_socketOut.println("OK");
60	<	_socketOut.flush();
61	<	}
67	>	// try for HEARTBEAT
68	>	getInBound("HEARTBEAT");
69	>	_socketOut.println("OK");
70
71	<	inBound = _socketIn.readLine();
72	<	if(!inBound.equals("CONFIG")) {
73	<	_socketOut.println("ERROR");
66	<	_socketOut.flush();
67	<	throw new IOException("protocol error - expecting:CONFIG got:" + inBound);
68	<	} else {
69	<	_socketOut.println("OK");
70	<	_socketOut.flush();
71	<	}
71	>	// try for CONFIG
72	>	getInBound("CONFIG");
73	>	_socketOut.println("OK");
74
75	<	inBound = _socketIn.readLine();
76	<	filelist = inBound;
75	>	// try for {filelist}
76	>	filelist = getInBound();
77		_socketOut.println("OK");
76	–	_socketOut.flush();
78
79	<	inBound = _socketIn.readLine();
80	<	lastModified = inBound;
81	<
79	>	// try for {lastModified}
80	>	lastModified = getInBound();
81	>	// check to see if a config update has happen
82		boolean newConfig = _configManager.isModified(filelist, Long.parseLong(lastModified));
82	–
83		if(newConfig) {
84	+	// new config !
85		_socketOut.println("ERROR");
86		}
87		else {
88	+	// nothing has changed
89		_socketOut.println("OK");
90		}
89	–	_socketOut.flush();
91
92	<	inBound = _socketIn.readLine();
93	<	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");
98	<	_socketOut.flush();
99	<	}
100	<
101	<	String date = new Long(System.currentTimeMillis()).toString();
102	<	String hostname = _socket.getInetAddress().getHostName();
92	>	// try for CONFIG
93	>	getInBound("ENDHEARTBEAT");
94	>	_socketOut.println("OK");
95	>
96	>	// work out some information for our heartbeat packet
97	>	String date = new Long(System.currentTimeMillis()/((long) 1000)).toString(); //seconds
98	>	String hostname = _socket.getInetAddress().getHostName().toLowerCase();
99		String ipadd = _socket.getInetAddress().getHostAddress();
104	–	String xml = "<packet type=\"heartbeat\" machine_name=\""+hostname+"\" date=\""+date+"\" ip=\""+ipadd+"\"></packet>";
100
101	<	FilterThread t = new FilterThread(xml, _parent);
102	<	t.start();
101	>	// run the service checks for this host
102	>	_logger.write(toString(), Logger.DEBUG, "Running service checks");
103	>	String checks = PluginServiceCheckManager.getInstance().runServiceChecks(hostname);
104
105	+	// build the heartbeat packet
106	+	String xml = "<packet type=\"heartbeat\" machine_name=\""+hostname+"\" date=\""+date+"\" ip=\""+ipadd+"\">" + checks + "</packet>";
107	+
108	+	// get it to be sent on
109	+	_queue.add(xml);
110	+
111		} catch (Exception e) {
112	<	_logger.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage());
112	>	_logger.write(toString(), Logger.ERROR, "ERROR: " + e);
113		}
114
113	–	_socketOut.flush();
115		// Disconnect streams & socket
116		try {
117		_socketIn.close();
#	Line 119 | Line 120 | class TCPReaderInit extends Thread {
120		} catch (IOException e) {
121		_logger.write(toString(), Logger.ERROR, "exception on socket close");
122		}
123	<	_logger.write(toString(), Logger.SYSMSG, "finished");
123	>	_logger.write(toString(), Logger.DEBUG, "finished");
124		}
125
126		/**
127		* Overrides the {@link java.lang.Object#toString() Object.toString()}
128		* method to provide clean logging (every class should have this).
129		*
130	+	* This uses the uk.org.iscream.cms.server.util.NameFormat class
131	+	* to format the toString()
132	+	*
133		* @return the name of this class and its CVS revision
134		*/
135		public String toString() {
136	<	return this.getClass().getName() + "{" + _socket.getInetAddress().getHostName()
137	<	+ "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
138	<
136	>	return FormatName.getName(
137	>	_name,
138	>	getClass().getName(),
139	>	REVISION);
140		}
141
142		//---PRIVATE METHODS---
143
144	+	private String getInBound(String expected) throws IOException {
145	+	// grab the input
146	+	String inBound = getInBound();
147	+	// check if it's what we're expecting
148	+	if(!inBound.equals(expected)) {
149	+	throw new IOException("protocol error from "+_socket.getInetAddress().getHostName()+" - expected:"+expected+" got:" + inBound);
150	+	}
151	+	// it should be ok then
152	+	return inBound;
153	+	}
154	+
155	+	private String getInBound() throws IOException {
156	+	// grab the input
157	+	String inBound = _socketIn.readLine();
158	+	// check for null's, likely disconnection
159	+	if(inBound == null) {
160	+	throw new IOException("got null from host, maybe it died");
161	+	}
162	+	// it's a valid message it seems
163	+	return inBound;
164	+	}
165	+
166		//---ACCESSOR/MUTATOR METHODS---
167
168		//---ATTRIBUTES---
169
170	+	/**
171	+	* A reference to the configuration manager
172	+	*/
173		ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
174	<	Logger _logger = ReferenceManager.getInstance().getLogger();
174	>
175	>	/**
176	>	* This is the friendly identifier of the
177	>	* component this class is running in.
178	>	* eg, a Filter may be called "filter1",
179	>	* If this class does not have an owning
180	>	* component,  a name from the configuration
181	>	* can be placed here.  This name could also
182	>	* be changed to null for utility classes.
183	>	*/
184	>	private String _name = FilterMain.NAME;
185	>
186	>	/**
187	>	* This holds a reference to the
188	>	* system logger that is being used.
189	>	*/
190	>	private Logger _logger = ReferenceManager.getInstance().getLogger();
191	>
192	>	/**
193	>	* The socket we are talking on
194	>	*/
195		Socket _socket;
196	+
197	+	/**
198	+	* The input from the socket
199	+	*/
200		BufferedReader _socketIn;
201	+
202	+	/**
203	+	* The output from the socket
204	+	*/
205		PrintWriter _socketOut;
206	<	Filter _parent;
206	>
207	>	/**
208	>	* A reference to our Queue
209	>	*/
210	>	Queue _queue;
211		//---STATIC ATTRIBUTES---
212
213		}

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