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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/rootfilter/RootFilter.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/rootfilter/RootFilter.java (file contents):
Revision 1.5 by ajm, Thu Nov 30 03:06:39 2000 UTC vs.
Revision 1.11 by ajm, Tue Dec 12 20:44:03 2000 UTC

#	Line 4 | Line 4 | package uk.ac.ukc.iscream.rootfilter;
4		//---IMPORTS---
5		import uk.ac.ukc.iscream.util.*;
6		import uk.ac.ukc.iscream.core.*;
7	+	import uk.ac.ukc.iscream.clientinterface.*;
8
9		/**
10	<	* A Filter Startup Class
10	>	* The root filter is what all filters talk to
11	>	* Hosts cannot talk to this implementation of a filter.
12	>	* It provides hooks to all data interfaces for the system
13	>	* namely the client interface and the db interface.
14	>	* This is an i-scream component that starts the
15	>	* RootFilter services.
16		*
17		* @author  $Author$
18		* @version $Id$
19		*/
20	<	class FilterMain {
20	>	public class RootFilter implements uk.ac.ukc.iscream.util.Component {
21
22		//---FINAL ATTRIBUTES---
23
#	Line 19 | Line 25 | class FilterMain {
25		* The current CVS revision of this class
26		*/
27		public static final String REVISION = "$Revision$";
28	<
28	>
29		//---STATIC METHODS---
30
31	<	public static void main(String[] args) {
26	<	// ***************************************
27	<	// VERY TEMPORARY - will find a better way
28	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
29	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
30	<	// ***************************************
31	>	//---CONSTRUCTORS---
32
33	<	ReferenceManager refman = ReferenceManager.init(null, null);
33	<
34	<	// can't have a real toString() :)
35	<	String toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
33	>	//---PUBLIC METHODS---
34
35	<	refman.getLogger().write(toString, Logger.SYSINIT, "coming up");
35	>	/**
36	>	* This starts the Root Filter for the system
37	>	*/
38	>	public void start() throws ComponentStartException {
39	>
40	>	_logger.write(toString(), Logger.SYSINIT, "coming up");
41
42		// configuration variables we require
43		String ourName = null;
44	+	String realInterface = null;
45	+	String dbInterface = null;
46
47	<	Configuration config = refman.getCM().getConfiguration("RootFilter");
47	>	Configuration config = _refman.getCM().getConfiguration("RootFilter");
48		if (config == null) {
49	<	throw new RuntimeException ("CRITICAL:Unable to obtain configuration" +
50	<	"         Advise you check the i-scream log for more information.");
49	>	System.err.println("CRITICAL:Unable to obtain configuration" +
50	>	"\n         Advise you check the i-scream log for more information.");
51	>	_logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration");
52	>	System.exit(1);
53		} else {
54		try {
55	<	ourName = config.getProperty("Filter.rootFilter");
55	>	ourName = config.getProperty("RootFilter.name");
56	>	realInterface = config.getProperty("RootFilter.realtimeInterfaceName");
57	>	dbInterface = config.getProperty("RootFilter.dbInterfaceName");
58		} catch (org.omg.CORBA.MARSHAL e) {
59	<	refman.getLogger().write(toString, Logger.FATAL, "required config property not present");
60	<	throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" +
61	<	"         Advise you check the i-scream log for more information.");
62	<
59	>	System.err.println ("CRITICAL:Unable to obtain required configuration property" +
60	>	"\n         Advise you check the i-scream log for more information.");
61	>	_logger.write(toString(), Logger.FATAL, "ERROR - required configuration property not present");
62	>	System.exit(1);
63		}
64		}
65		// now we have the name of the Root Filter we set it
66	<	refman.setName(ourName);
58	<	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
66	>	NAME = ourName;
67
68	<	// FilterServant start (for inbound child filter data)
69	<	refman.getLogger().write(toString, Logger.DEBUG, "starting Root Filter");
70	<	RootFilterServant filterServant = new RootFilterServant();
71	<	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
68	>	_logger.write(toString(), Logger.SYSINIT, "configured");
69	>
70	>	// get reference to the client interfaces - the real time one
71	>	if (realInterface != null) {
72	>	ClientInterface ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
73	>	}
74	>	// get reference to the client interfaces - and the db one
75	>	if (dbInterface != null) {
76	>	ClientInterface ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
77	>	}
78	>
79	>	ClientInterface[] clientInterfaces;
80	>	if (realInterface == null) {
81	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
82	>	clientInterfaces = {ciReal, ciDB};
83	>	} else if (dbInterface == null) {
84	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
85	>	clientInterfaces = {ciReal};
86	>	} else {
87	>	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
88	>	clientInterfaces = {ciReal, ciDB};
89	>	}
90
91	<	// start the POA off
92	<	// now we are running, we just need to serve
93	<	// so we ask the orb to block for us until it has finished
94	<	refman.activatePOA();
95	<	refman.getLogger().write(toString, Logger.SYSINIT, "started");
96	<	refman.getORB().run();
91	>	// RootFilterServant start (for inbound child filter data)
92	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
93	>	RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
94	>	// bind to the naming service as a filter
95	>	_refman.bindToOrb(filterServant, "iscream.Filter." + _name);
96	>
97	>	_logger.write(toString(), Logger.SYSINIT, "started");
98		}
99	<
100	<	/**
101	<	* A simple method to print the usage of this class.
102	<	* It never returns, but instead exits to the system
103	<	* with a value 1, to indicate the system did not start
104	<	* properly.
99	>
100	>	/**
101	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
102	>	* method to provide clean logging (every class should have this).
103	>	*
104	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
105	>	* to format the toString()
106	>	*
107	>	* @return the name of this class and its CVS revision
108		*/
109	<	public static void usage() {
110	<	System.out.println("USAGE: java FilterMain <name>");
111	<	System.out.println("WHERE <name>:");
112	<	System.out.println("      The unique identifier for the Filter in the system.");
113	<	System.exit(1);
109	>	public String toString() {
110	>	return FormatName.getName(
111	>	_name,
112	>	getClass().getName(),
113	>	REVISION);
114		}
115
86	–	//---CONSTRUCTORS---
87	–
88	–	//---PUBLIC METHODS---
89	–
116		//---PRIVATE METHODS---
117
118		//---ACCESSOR/MUTATOR METHODS---
119
120		//---ATTRIBUTES---
121
122	+	/**
123	+	* This is the friendly identifier of the
124	+	* component this class is running in.
125	+	* eg, a Filter may be called "filter1",
126	+	* If this class does not have an owning
127	+	* component,  a name from the configuration
128	+	* can be placed here.  This name could also
129	+	* be changed to null for utility classes.
130	+	*/
131	+	private String _name = RootFilter.NAME;
132	+
133	+	/**
134	+	* This holds a reference to the
135	+	* system logger that is being used.
136	+	*/
137	+	private Logger _logger = ReferenceManager.getInstance().getLogger();
138	+
139	+	/**
140	+	* A reference to the reference manager in use
141	+	*/
142	+	private ReferenceManager _refman = ReferenceManager.getInstance();
143	+
144		//---STATIC ATTRIBUTES---
145	+
146	+	/**
147	+	* The friendly name for this component, used by
148	+	* all related classes.
149	+	* This is set from the configuration.
150	+	*/
151	+	public static String NAME;
152
153		}

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