cms/corbaservices/CorbaServices.java

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2002 i-scream
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

//---PACKAGE DECLARATION---
package uk.org.iscream.cms.corbaservices;

//---IMPORTS---
import java.lang.reflect.*;
import java.util.*;
import java.io.*;
import java.net.*;

/**
 * CORBA Services Manager
 *
 * This class provides a simple wrapper to CORBA services
 * that require a web service to "share" their IOR files.
 * This provides an all-in-one way of starting up service(s)
 * and serving their IOR files. No external web servers are
 * required.
 *
 * @author  $Author: tdb $
 * @version $Id: CorbaServices.java,v 1.12 2003/02/21 13:45:47 tdb Exp $
 */
class CorbaServices {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public static final String REVISION = "$Revision: 1.12 $";
    
    /**
     * Default path to "ok URL's" list
     */
    public static final String DEFAULTOKURLS = "./etc/okUrls.conf";
    
    /**
     * Default path to services list
     */
    public static final String DEFAULTSERVICESCONF = "./etc/services.conf";
    
    /**
     * Default path to web directory. Note there is *no* trailing slash.
     */
    public static final String DEFAULTWEBDIR = "./web";
    
    /**
     * Default port number
     */
    public static final int DEFAULTPORT = 8052;

    /**
     * The default location of the properties file for the system
     */
    public static final String DEFAULTPROPERTIES = "./etc/default.properties";
    
//---STATIC METHODS---
    
    /**
     * This main method starts the whole system up. A lot
     * of the functionality is provided in this main class.
     */
    public static void main(String args[]) {
        
        System.out.println("-----------------------------------------");
        System.out.println("---  i-scream CORBA Services Manager  ---");
        System.out.println("---   (c) 2001 The i-scream Project   ---");
        System.out.println("---    (http://www.i-scream.org)   ---");
        System.out.println("-----------------------------------------");
        System.out.println("---          Starting System          ---");
        
        // Read command line arguments
        String okUrls = DEFAULTOKURLS;
        String servicesConf = DEFAULTSERVICESCONF;
        String webDir = DEFAULTWEBDIR;
        int port = DEFAULTPORT;
        String defaultProperties = DEFAULTPROPERTIES;
        for(int i=0; i < args.length; i++) {
            if(args[i].equals("-h")) {
                usage();
            }
            else if(args[i].equals("-u")) {
                if(++i < args.length) {
                    okUrls = args[i];
                }
                else {
                    usage();
                }
            }
            else if(args[i].equals("-s")) {
                if(++i < args.length) {
                    servicesConf = args[i];
                }
                else {
                    usage();
                }
            }
            else if(args[i].equals("-w")) {
                if(++i < args.length) {
                    webDir = args[i];
                }
                else {
                    usage();
                }
            }
            else if(args[i].equals("-p")) {
                if(++i < args.length) {
                    port = Integer.parseInt(args[i]);
                }
                else {
                    usage();
                }
            }
            else if(args[i].equals("-l")) {
                if(++i < args.length) {
                    defaultProperties = args[i];
                }
                else {
                    usage();
                }
            }
            else {
                usage();
            }
        }
        
        // load the default properties file into the system properties
        System.out.println("initialising: reading " + defaultProperties);
        try {
            Properties initProperties = new Properties(System.getProperties());
            initProperties.load(new FileInputStream(new File(defaultProperties))
);
            System.setProperties(initProperties);
        } catch (Exception e) {
            System.err.println("ERROR: " + e.getMessage());
            usage();
        }
        
        // Read in the services configuration
        System.out.println("---       Reading Configuration       ---");
        
        LinkedList serviceList = getServicesList(servicesConf);
        String[] svcList = new String[serviceList.size()];
        LinkedList[] svcListParams = new LinkedList[serviceList.size()];
        Iterator i = serviceList.iterator();
        int j=0;
        while(i.hasNext()) {
            StringTokenizer st = new StringTokenizer((String)i.next());
            svcList[j] = (String) st.nextToken();
            LinkedList l = new LinkedList();
            while (st.hasMoreTokens()) {
                l.add(st.nextToken());
            }
            svcListParams[j] = l;
            j++;
        }
        
        // Start the services one by one
        System.out.println("---      Starting CORBA Services      ---");
        
        try {
            
            // get hooks on the system loaders
            Runtime myRuntime = Runtime.getRuntime();
            ClassLoader myClassLoader = ClassLoader.getSystemClassLoader();
            
            // start each service one by one
            for (int k=0; k < svcList.length; k++) {
                
                // Load the class
                Class myClass = myClassLoader.loadClass(svcList[k]);
                // Sort out the command line parameters
                String[] passedArgs = new String[svcListParams[k].size()];
                // keep a String list for printing out later :)
                String arglist = "";
                i = svcListParams[k].iterator();
                int p = 0;
                while(i.hasNext()) {
                    passedArgs[p] = (String) i.next();
                    arglist += " " + passedArgs[p];
                    p++;
                }
                                                        
                // create an array of classes that are listed in the main method header
                // so we can get a hook to the main method
                Class[] passedArgsClass = {passedArgs.getClass()};
                // get a hook on the main method
                Method myMethod = myClass.getMethod("main",passedArgsClass);
                
                // Now we know where it is, we need to create a thread for it, passing in 
                // a list of objects that represent its args.
                Object[] passedArgsObject = {passedArgs};               
                ServiceThread aSvc = new ServiceThread(myMethod, passedArgsObject);
    
                // Finally we start it going
                aSvc.start();
                System.out.println(svcList[k]+arglist);        
            }
        
        } catch (Exception e) {
            System.out.println(e);
            e.printStackTrace();
        }
        
        System.out.println("---      Starting Mini WebServer      ---");
        
        // print out some system details
        String host;
        try {
            host = InetAddress.getLocalHost().getHostName();
        } catch(UnknownHostException e) {
            host = "<unknown>";
        }
        System.out.println("Host:\t\t"+host);
        System.out.println("Port:\t\t"+port);
        System.out.println("URL List File:\t"+okUrls);
        System.out.println("Web Directory:\t"+webDir);
        
        // start the mini-webserver
        MiniWebServer mws = new MiniWebServer(port, okUrls, webDir);
        mws.start();

        System.out.println("---   i-scream CORBA Services Ready   ---");
    }
    
    /**
     * Print out usage information.
     */
    private static void usage() {
        System.out.println("USAGE: java uk.org.iscream.cms.corbaservices.CorbaServices <option>");
        System.out.println("   or: java -jar iscream-corbaservices.jar <option>");
        System.out.println("WHERE <option>:");
        System.out.println("      -u <filename> - the location of okUrls config file");
        System.out.println("                      the default is ./etc/okUrls.conf");
        System.out.println("      -s <filename> - the location of services config file");
        System.out.println("                      the default is ./etc/services.conf");
        System.out.println("      -w <dir>      - the location of the web directory");
        System.out.println("                      the default is ./web  (no trailing /)");
        System.out.println("      -p <port>     - this port to bind the webserver to");
        System.out.println("                      the default is 8052");
        System.out.println("      -l <filename> - the location of initial system properties");
        System.out.println("                      the default is ./etc/default.properties");
        System.out.println("      -h            - this help screen");
        System.exit(1);
    }
    
    /**
     * Read the services into a LinkedList. This is later
     * parsed to get classes and parameters.
     *
     * @param filename the services configuration file
     * @return a LinkedList of services
     */
    private static LinkedList getServicesList(String filename) {
        File file = new File(filename);
        LinkedList svcList = new LinkedList();
        if(file.exists() && file.canRead()) {
            // if we can read the file, do so into svcList
            try {
                BufferedReader reader = new BufferedReader(new FileReader(file));
                while(reader.ready()) {
                    String line = reader.readLine();
                    // ignore comments
                    if(!line.startsWith("#")) {
                        svcList.add(line);
                    }
                }
            } catch(IOException e) {
                System.out.println(e);
                e.printStackTrace();
            }
        }
        return svcList;
    }

//---CONSTRUCTORS---

//---PUBLIC METHODS---

//---PRIVATE METHODS---

//---ACCESSOR/MUTATOR METHODS---

//---ATTRIBUTES---

//---STATIC ATTRIBUTES---

//---INNER CLASSES---
    
    /**
     * Inner class to provide a thread for running a Service.
     */
    private static class ServiceThread extends Thread {
     
        /**
         * The constructor takes the name of the method we're gonna run
         * and the arguments we're gonna pass into it.
         *
         * @param mainMethod a method that we'll treat as main
         * @param args an array of arguments for mainMethod
         */
        ServiceThread(Method mainMethod, Object[] args) {
            _mainMethod = mainMethod;
            _args = args;
        }
        
        /**
         * Invokes our main method, with the arguments we
         * have been given.
         */
        public void run() {
            try {
                _mainMethod.invoke(null, _args);
            } catch (Exception e){
                System.out.println(e);
                e.printStackTrace();
            }
        }
        
        /**
         * The method we'll treat as main
         */
        Method _mainMethod = null;
        
        /**
         * The array of arguments
         */
        Object[] _args = null;
    }

}
Revision:	1.13
Committed:	Sun Aug 1 10:40:20 2004 UTC (19 years, 9 months ago) by tdb
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.12:	+4 -4 lines
Log Message:	Catch a lot of old URL's and update them. Also remove a couple of old files that aren't used.
#	Content
1	/*
2	* i-scream central monitoring system
3	* http://www.i-scream.org
4	* Copyright (C) 2000-2002 i-scream
5	*
6	* This program is free software; you can redistribute it and/or
7	* modify it under the terms of the GNU General Public License
8	* as published by the Free Software Foundation; either version 2
9	* of the License, or (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19	*/
20
21	//---PACKAGE DECLARATION---
22	package uk.org.iscream.cms.corbaservices;
23
24	//---IMPORTS---
25	import java.lang.reflect.*;
26	import java.util.*;
27	import java.io.*;
28	import java.net.*;
29
30	/**
31	* CORBA Services Manager
32	*
33	* This class provides a simple wrapper to CORBA services
34	* that require a web service to "share" their IOR files.
35	* This provides an all-in-one way of starting up service(s)
36	* and serving their IOR files. No external web servers are
37	* required.
38	*
39	* @author $Author: tdb $
40	* @version $Id: CorbaServices.java,v 1.12 2003/02/21 13:45:47 tdb Exp $
41	*/
42	class CorbaServices {
43
44	//---FINAL ATTRIBUTES---
45
46	/**
47	* The current CVS revision of this class
48	*/
49	public static final String REVISION = "$Revision: 1.12 $";
50
51	/**
52	* Default path to "ok URL's" list
53	*/
54	public static final String DEFAULTOKURLS = "./etc/okUrls.conf";
55
56	/**
57	* Default path to services list
58	*/
59	public static final String DEFAULTSERVICESCONF = "./etc/services.conf";
60
61	/**
62	* Default path to web directory. Note there is no trailing slash.
63	*/
64	public static final String DEFAULTWEBDIR = "./web";
65
66	/**
67	* Default port number
68	*/
69	public static final int DEFAULTPORT = 8052;
70
71	/**
72	* The default location of the properties file for the system
73	*/
74	public static final String DEFAULTPROPERTIES = "./etc/default.properties";
75
76	//---STATIC METHODS---
77
78	/**
79	* This main method starts the whole system up. A lot
80	* of the functionality is provided in this main class.
81	*/
82	public static void main(String args[]) {
83
84	System.out.println("-----------------------------------------");
85	System.out.println("--- i-scream CORBA Services Manager ---");
86	System.out.println("--- (c) 2001 The i-scream Project ---");
87	System.out.println("--- (http://www.i-scream.org) ---");
88	System.out.println("-----------------------------------------");
89	System.out.println("--- Starting System ---");
90
91	// Read command line arguments
92	String okUrls = DEFAULTOKURLS;
93	String servicesConf = DEFAULTSERVICESCONF;
94	String webDir = DEFAULTWEBDIR;
95	int port = DEFAULTPORT;
96	String defaultProperties = DEFAULTPROPERTIES;
97	for(int i=0; i < args.length; i++) {
98	if(args[i].equals("-h")) {
99	usage();
100	}
101	else if(args[i].equals("-u")) {
102	if(++i < args.length) {
103	okUrls = args[i];
104	}
105	else {
106	usage();
107	}
108	}
109	else if(args[i].equals("-s")) {
110	if(++i < args.length) {
111	servicesConf = args[i];
112	}
113	else {
114	usage();
115	}
116	}
117	else if(args[i].equals("-w")) {
118	if(++i < args.length) {
119	webDir = args[i];
120	}
121	else {
122	usage();
123	}
124	}
125	else if(args[i].equals("-p")) {
126	if(++i < args.length) {
127	port = Integer.parseInt(args[i]);
128	}
129	else {
130	usage();
131	}
132	}
133	else if(args[i].equals("-l")) {
134	if(++i < args.length) {
135	defaultProperties = args[i];
136	}
137	else {
138	usage();
139	}
140	}
141	else {
142	usage();
143	}
144	}
145
146	// load the default properties file into the system properties
147	System.out.println("initialising: reading " + defaultProperties);
148	try {
149	Properties initProperties = new Properties(System.getProperties());
150	initProperties.load(new FileInputStream(new File(defaultProperties))
151	);
152	System.setProperties(initProperties);
153	} catch (Exception e) {
154	System.err.println("ERROR: " + e.getMessage());
155	usage();
156	}
157
158	// Read in the services configuration
159	System.out.println("--- Reading Configuration ---");
160
161	LinkedList serviceList = getServicesList(servicesConf);
162	String[] svcList = new String[serviceList.size()];
163	LinkedList[] svcListParams = new LinkedList[serviceList.size()];
164	Iterator i = serviceList.iterator();
165	int j=0;
166	while(i.hasNext()) {
167	StringTokenizer st = new StringTokenizer((String)i.next());
168	svcList[j] = (String) st.nextToken();
169	LinkedList l = new LinkedList();
170	while (st.hasMoreTokens()) {
171	l.add(st.nextToken());
172	}
173	svcListParams[j] = l;
174	j++;
175	}
176
177	// Start the services one by one
178	System.out.println("--- Starting CORBA Services ---");
179
180	try {
181
182	// get hooks on the system loaders
183	Runtime myRuntime = Runtime.getRuntime();
184	ClassLoader myClassLoader = ClassLoader.getSystemClassLoader();
185
186	// start each service one by one
187	for (int k=0; k < svcList.length; k++) {
188
189	// Load the class
190	Class myClass = myClassLoader.loadClass(svcList[k]);
191	// Sort out the command line parameters
192	String[] passedArgs = new String[svcListParams[k].size()];
193	// keep a String list for printing out later :)
194	String arglist = "";
195	i = svcListParams[k].iterator();
196	int p = 0;
197	while(i.hasNext()) {
198	passedArgs[p] = (String) i.next();
199	arglist += " " + passedArgs[p];
200	p++;
201	}
202
203	// create an array of classes that are listed in the main method header
204	// so we can get a hook to the main method
205	Class[] passedArgsClass = {passedArgs.getClass()};
206	// get a hook on the main method
207	Method myMethod = myClass.getMethod("main",passedArgsClass);
208
209	// Now we know where it is, we need to create a thread for it, passing in
210	// a list of objects that represent its args.
211	Object[] passedArgsObject = {passedArgs};
212	ServiceThread aSvc = new ServiceThread(myMethod, passedArgsObject);
213
214	// Finally we start it going
215	aSvc.start();
216	System.out.println(svcList[k]+arglist);
217	}
218
219	} catch (Exception e) {
220	System.out.println(e);
221	e.printStackTrace();
222	}
223
224	System.out.println("--- Starting Mini WebServer ---");
225
226	// print out some system details
227	String host;
228	try {
229	host = InetAddress.getLocalHost().getHostName();
230	} catch(UnknownHostException e) {
231	host = "<unknown>";
232	}
233	System.out.println("Host:\t\t"+host);
234	System.out.println("Port:\t\t"+port);
235	System.out.println("URL List File:\t"+okUrls);
236	System.out.println("Web Directory:\t"+webDir);
237
238	// start the mini-webserver
239	MiniWebServer mws = new MiniWebServer(port, okUrls, webDir);
240	mws.start();
241
242	System.out.println("--- i-scream CORBA Services Ready ---");
243	}
244
245	/**
246	* Print out usage information.
247	*/
248	private static void usage() {
249	System.out.println("USAGE: java uk.org.iscream.cms.corbaservices.CorbaServices <option>");
250	System.out.println(" or: java -jar iscream-corbaservices.jar <option>");
251	System.out.println("WHERE <option>:");
252	System.out.println(" -u <filename> - the location of okUrls config file");
253	System.out.println(" the default is ./etc/okUrls.conf");
254	System.out.println(" -s <filename> - the location of services config file");
255	System.out.println(" the default is ./etc/services.conf");
256	System.out.println(" -w <dir> - the location of the web directory");
257	System.out.println(" the default is ./web (no trailing /)");
258	System.out.println(" -p <port> - this port to bind the webserver to");
259	System.out.println(" the default is 8052");
260	System.out.println(" -l <filename> - the location of initial system properties");
261	System.out.println(" the default is ./etc/default.properties");
262	System.out.println(" -h - this help screen");
263	System.exit(1);
264	}
265
266	/**
267	* Read the services into a LinkedList. This is later
268	* parsed to get classes and parameters.
269	*
270	* @param filename the services configuration file
271	* @return a LinkedList of services
272	*/
273	private static LinkedList getServicesList(String filename) {
274	File file = new File(filename);
275	LinkedList svcList = new LinkedList();
276	if(file.exists() && file.canRead()) {
277	// if we can read the file, do so into svcList
278	try {
279	BufferedReader reader = new BufferedReader(new FileReader(file));
280	while(reader.ready()) {
281	String line = reader.readLine();
282	// ignore comments
283	if(!line.startsWith("#")) {
284	svcList.add(line);
285	}
286	}
287	} catch(IOException e) {
288	System.out.println(e);
289	e.printStackTrace();
290	}
291	}
292	return svcList;
293	}
294
295	//---CONSTRUCTORS---
296
297	//---PUBLIC METHODS---
298
299	//---PRIVATE METHODS---
300
301	//---ACCESSOR/MUTATOR METHODS---
302
303	//---ATTRIBUTES---
304
305	//---STATIC ATTRIBUTES---
306
307	//---INNER CLASSES---
308
309	/**
310	* Inner class to provide a thread for running a Service.
311	*/
312	private static class ServiceThread extends Thread {
313
314	/**
315	* The constructor takes the name of the method we're gonna run
316	* and the arguments we're gonna pass into it.
317	*
318	* @param mainMethod a method that we'll treat as main
319	* @param args an array of arguments for mainMethod
320	*/
321	ServiceThread(Method mainMethod, Object[] args) {
322	_mainMethod = mainMethod;
323	_args = args;
324	}
325
326	/**
327	* Invokes our main method, with the arguments we
328	* have been given.
329	*/
330	public void run() {
331	try {
332	_mainMethod.invoke(null, _args);
333	} catch (Exception e){
334	System.out.println(e);
335	e.printStackTrace();
336	}
337	}
338
339	/**
340	* The method we'll treat as main
341	*/
342	Method _mainMethod = null;
343
344	/**
345	* The array of arguments
346	*/
347	Object[] _args = null;
348	}
349
350	}