server/filter/FilterMain.java

//---PACKAGE DECLARATION---
package uk.ac.ukc.iscream.filter;

//---IMPORTS---
import uk.ac.ukc.iscream.core.*;
import uk.ac.ukc.iscream.filter.*;
import org.omg.CORBA.*;
import org.omg.CosNaming.*;
import org.omg.PortableServer.*;

/**
 * A Filter Startup Class
 *
 * @author  $Author: tdb1 $
 * @version $Id: FilterMain.java,v 1.10 2000/11/27 21:46:25 tdb1 Exp $
 */
class FilterMain {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public static final String REVISION = "$Revision: 1.10 $";
    
//---STATIC METHODS---

    public static void main(String[] args) {
        System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
        System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
        
        // get our name from the command line
        String ourName = "";
        if (args.length == 1) {
            ourName = args[0];
        }
        else {
            usage();
        }
        
        // can't have a real toString() :)
        String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
        
        try {        
            ORB orb = ORB.init(args, null);
            
            // something to hold objects
            org.omg.CORBA.Object objRef = null;    
            
            // get the Root POA
            objRef = orb.resolve_initial_references("RootPOA");
            POA poa = POAHelper.narrow(objRef);
            
            // get a hook to the name service
            objRef = orb.resolve_initial_references("NameService");
            NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
                
            // get a ref to the ConfigurationManager, Logger & the FilterManager
            
            objRef = ncRef.resolve(ncRef.to_name("iscream.ConfigurationManager"));
            ConfigurationManager configManager = ConfigurationManagerHelper.narrow(objRef);
            
            objRef = ncRef.resolve(ncRef.to_name("iscream.Logger"));
            Logger logger = LoggerHelper.narrow(objRef);
            
            logger.write(toString, Logger.SYSINIT, "coming up");
            
            
            // **** THIS SECTION WILL NEED CHANGING TO GET RELEVANT CONFIG
            // **** Please ignore this block of code, it's just "copy/paste" :)
            
            // get the config
            Configuration myConfig = configManager.getConfiguration(ourName);
            
            // read some config here
            int UDPport = 0;
            int TCPport = 0;
            String parentFilterName = null;
  
            // did we?
            if (myConfig == null) {
                System.out.println("Failed: is it there?, can you read it?");
                System.exit(1);
            } else {
              
                // get the property
                try {
                    //QUERY HERE.... ???
                    UDPport = new Integer(myConfig.getProperty("Filter.UDPlistenPort")).intValue();
                    TCPport = new Integer(myConfig.getProperty("Filter.TCPlistenPort")).intValue();
                    parentFilterName = myConfig.getProperty("Filter.parentFilter");
                } catch (org.omg.CORBA.MARSHAL e) {
                    System.out.println("Caught org.omg.CORBA.MARSHAL, must be a null we got back");
                    //System.exit(1);
                }
            }
            
            logger.write(toString, Logger.SYSINIT, "configured");
            
            // **** END COMMENT
            
            // **** INITIAL FILTER MANAGER COMMUNICATIONS HERE
            
            // get a root (CHANGE to use FilterManager)
            objRef = ncRef.resolve(ncRef.to_name("iscream.Filter." + parentFilterName));
            Filter parentFilter = FilterHelper.narrow(objRef);

            // SETUP our Servant
            
            // create the FilterServant
            FilterServant filterServant = new FilterServant(logger, parentFilter, ourName, new Integer(TCPport).toString() , new Integer(UDPport).toString());

            // register ourselves

            // and advertise it to the naming context
            objRef = poa.servant_to_reference(filterServant);
            ncRef.bind(ncRef.to_name("iscream.Filter."+ourName), objRef);

            // **** END COMMENT
            
            // END SETUP
            

            /**************************************************************
              Here would be an ideal place to start another thread to do
              the listening part of the Filter. Ideally it should just be
              created and then run(). It may be necessary to pass some of
              the following parameters into the thread by the constructor.
              
                  Logger logger
                      - a reference to a Logger object
                  FilterManager filterManager
                      - a reference to the system filter manager
                  ConfigurationManager configManager
                      - a reference to the system configuration manager
                  Configuration myConfig
                      - a reference to the configuration object for this
                        filter instance
                  String ourName
                      - our "identifier" name
            
            **************************************************************/
                                    
            logger.write(toString, Logger.SYSINIT, "starting Filter UDP listener");
            UDPReader udpReader = new UDPReader(UDPport, parentFilter, logger);
            udpReader.start();
            logger.write(toString, Logger.SYSINIT, "Filter UDP listener started");

            logger.write(toString, Logger.SYSINIT, "starting Filter TCP listener");
            TCPReader tcpReader = new TCPReader(logger, configManager, TCPport, parentFilter);
            tcpReader.start();
            logger.write(toString, Logger.SYSINIT, "Filter TCP listener started");

            // TEST
            //parentFilter.receiveXML("<?xml version=\"1.0\" encoding=\"ISO8859-1\"?><packet><test>This is just a debugging test, we ("+ourName+") are live on UDPport: "+UDPport+"</test></packet>");
            
            // start the POA off
            poa.the_POAManager().activate();
                        
            logger.write(toString, Logger.SYSINIT, "started");
            
            // now we are running, we just need to serve
            // so we ask the orb to block for us until it has finished
            orb.run();
            
        } catch (Exception e) {
            System.err.println("FILTER ERROR: " + e);
            e.printStackTrace(System.out);
        }
    }

    /** 
     * A simple method to print the usage of this class.
     * It never returns, but instead exits to the system
     * with a value 1, to indicate the system did not start
     * properly.
     */
    public static void usage() {
        System.out.println("USAGE: java FilterMain <name>");
        System.out.println("WHERE <name>:");
        System.out.println("      The unique identifier for the Filter in the system.");
        System.exit(1);
    }

//---CONSTRUCTORS---

//---PUBLIC METHODS---

//---PRIVATE METHODS---

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

//---ATTRIBUTES---

//---STATIC ATTRIBUTES---

}            
Revision:	1.11
Committed:	Wed Nov 29 19:26:00 2000 UTC (23 years, 5 months ago) by tdb
Branch:	MAIN
Changes since 1.10:	+3 -2 lines
Log Message:	Made changes to fit into the new package structure. Also made all classes, namely the UDPReader and FilterThread, conform to the Template class specification.
#	Content
1	//---PACKAGE DECLARATION---
2	package uk.ac.ukc.iscream.filter;
3
4	//---IMPORTS---
5	import uk.ac.ukc.iscream.core.*;
6	import uk.ac.ukc.iscream.filter.*;
7	import org.omg.CORBA.*;
8	import org.omg.CosNaming.*;
9	import org.omg.PortableServer.*;
10
11	/**
12	* A Filter Startup Class
13	*
14	* @author $Author: tdb1 $
15	* @version $Id: FilterMain.java,v 1.10 2000/11/27 21:46:25 tdb1 Exp $
16	*/
17	class FilterMain {
18
19	//---FINAL ATTRIBUTES---
20
21	/**
22	* The current CVS revision of this class
23	*/
24	public static final String REVISION = "$Revision: 1.10 $";
25
26	//---STATIC METHODS---
27
28	public static void main(String[] args) {
29	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
30	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
31
32	// get our name from the command line
33	String ourName = "";
34	if (args.length == 1) {
35	ourName = args[0];
36	}
37	else {
38	usage();
39	}
40
41	// can't have a real toString() :)
42	String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
43
44	try {
45	ORB orb = ORB.init(args, null);
46
47	// something to hold objects
48	org.omg.CORBA.Object objRef = null;
49
50	// get the Root POA
51	objRef = orb.resolve_initial_references("RootPOA");
52	POA poa = POAHelper.narrow(objRef);
53
54	// get a hook to the name service
55	objRef = orb.resolve_initial_references("NameService");
56	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
57
58	// get a ref to the ConfigurationManager, Logger & the FilterManager
59
60	objRef = ncRef.resolve(ncRef.to_name("iscream.ConfigurationManager"));
61	ConfigurationManager configManager = ConfigurationManagerHelper.narrow(objRef);
62
63	objRef = ncRef.resolve(ncRef.to_name("iscream.Logger"));
64	Logger logger = LoggerHelper.narrow(objRef);
65
66	logger.write(toString, Logger.SYSINIT, "coming up");
67
68
69	// **** THIS SECTION WILL NEED CHANGING TO GET RELEVANT CONFIG
70	// **** Please ignore this block of code, it's just "copy/paste" :)
71
72	// get the config
73	Configuration myConfig = configManager.getConfiguration(ourName);
74
75	// read some config here
76	int UDPport = 0;
77	int TCPport = 0;
78	String parentFilterName = null;
79
80	// did we?
81	if (myConfig == null) {
82	System.out.println("Failed: is it there?, can you read it?");
83	System.exit(1);
84	} else {
85
86	// get the property
87	try {
88	//QUERY HERE.... ???
89	UDPport = new Integer(myConfig.getProperty("Filter.UDPlistenPort")).intValue();
90	TCPport = new Integer(myConfig.getProperty("Filter.TCPlistenPort")).intValue();
91	parentFilterName = myConfig.getProperty("Filter.parentFilter");
92	} catch (org.omg.CORBA.MARSHAL e) {
93	System.out.println("Caught org.omg.CORBA.MARSHAL, must be a null we got back");
94	//System.exit(1);
95	}
96	}
97
98	logger.write(toString, Logger.SYSINIT, "configured");
99
100	// **** END COMMENT
101
102	// **** INITIAL FILTER MANAGER COMMUNICATIONS HERE
103
104	// get a root (CHANGE to use FilterManager)
105	objRef = ncRef.resolve(ncRef.to_name("iscream.Filter." + parentFilterName));
106	Filter parentFilter = FilterHelper.narrow(objRef);
107
108	// SETUP our Servant
109
110	// create the FilterServant
111	FilterServant filterServant = new FilterServant(logger, parentFilter, ourName, new Integer(TCPport).toString() , new Integer(UDPport).toString());
112
113	// register ourselves
114
115	// and advertise it to the naming context
116	objRef = poa.servant_to_reference(filterServant);
117	ncRef.bind(ncRef.to_name("iscream.Filter."+ourName), objRef);
118
119	// **** END COMMENT
120
121	// END SETUP
122
123
124	/**************************************************************
125	Here would be an ideal place to start another thread to do
126	the listening part of the Filter. Ideally it should just be
127	created and then run(). It may be necessary to pass some of
128	the following parameters into the thread by the constructor.
129
130	Logger logger
131	- a reference to a Logger object
132	FilterManager filterManager
133	- a reference to the system filter manager
134	ConfigurationManager configManager
135	- a reference to the system configuration manager
136	Configuration myConfig
137	- a reference to the configuration object for this
138	filter instance
139	String ourName
140	- our "identifier" name
141
142	**************************************************************/
143
144	logger.write(toString, Logger.SYSINIT, "starting Filter UDP listener");
145	UDPReader udpReader = new UDPReader(UDPport, parentFilter, logger);
146	udpReader.start();
147	logger.write(toString, Logger.SYSINIT, "Filter UDP listener started");
148
149	logger.write(toString, Logger.SYSINIT, "starting Filter TCP listener");
150	TCPReader tcpReader = new TCPReader(logger, configManager, TCPport, parentFilter);
151	tcpReader.start();
152	logger.write(toString, Logger.SYSINIT, "Filter TCP listener started");
153
154	// TEST
155	//parentFilter.receiveXML("<?xml version=\"1.0\" encoding=\"ISO8859-1\"?><packet><test>This is just a debugging test, we ("+ourName+") are live on UDPport: "+UDPport+"</test></packet>");
156
157	// start the POA off
158	poa.the_POAManager().activate();
159
160	logger.write(toString, Logger.SYSINIT, "started");
161
162	// now we are running, we just need to serve
163	// so we ask the orb to block for us until it has finished
164	orb.run();
165
166	} catch (Exception e) {
167	System.err.println("FILTER ERROR: " + e);
168	e.printStackTrace(System.out);
169	}
170	}
171
172	/**
173	* A simple method to print the usage of this class.
174	* It never returns, but instead exits to the system
175	* with a value 1, to indicate the system did not start
176	* properly.
177	*/
178	public static void usage() {
179	System.out.println("USAGE: java FilterMain <name>");
180	System.out.println("WHERE <name>:");
181	System.out.println(" The unique identifier for the Filter in the system.");
182	System.exit(1);
183	}
184
185	//---CONSTRUCTORS---
186
187	//---PUBLIC METHODS---
188
189	//---PRIVATE METHODS---
190
191	//---ACCESSOR/MUTATOR METHODS---
192
193	//---ATTRIBUTES---
194
195	//---STATIC ATTRIBUTES---
196
197	}