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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 1.8 by ajm, Mon Dec 4 18:12:13 2000 UTC vs.
Revision 1.15 by tdb, Tue Jan 2 03:19:37 2001 UTC

#	Line 7 | Line 7 | 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 RootFilterMain {
20	>	public class RootFilter implements uk.ac.ukc.iscream.util.Component {
21
22		//---FINAL ATTRIBUTES---
23
#	Line 20 | Line 25 | class RootFilterMain {
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) {
27	<	// ***************************************
28	<	// VERY TEMPORARY - will find a better way
29	<	System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB");
30	<	System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton");
31	<	// ***************************************
31	>	//---CONSTRUCTORS---
32
33	<	ReferenceManager refman = ReferenceManager.init(null, null);
34	<
35	<	// can't have a real toString() :)
36	<	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("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);
67	<	toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
68	<	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
69	<
66	>	NAME = ourName;
67	>
68	>	_logger.write(toString(), Logger.SYSINIT, "configured");
69	>
70	>	ClientInterface ciReal = null, ciDB = null;
71		// get reference to the client interfaces - the real time one
72	<	ClientInterface ciReal = ClientInterfaceHelper.narrow(refman.getCORBARef("iscream.ClientInterface." + realInterface));
73	<	// - the db one ... but it's not done yet
74	<	//ClientInterface ciDB = ClientInterfaceHelper.narrow(refman.getCORBARef("iscream.ClientInterface." + dbInterface));
75	<	// so for the time being we null it.
76	<	ClientInterface ciDB = null;
77	<	refman.getLogger().write(toString, Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
72	>	if (realInterface != null) {
73	>	ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface));
74	>	}
75	>	// get reference to the client interfaces - and the db one
76	>	if (dbInterface != null) {
77	>	ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface));
78	>	}
79
80	<	ClientInterface[] clientInterfaces = {ciReal, ciDB};
80	>	Queue queue = new Queue();
81
82	+	if (realInterface == null) {
83	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
84	+	CIWrapper c = new CIWrapper(ciDB, queue);
85	+	c.start();
86	+	} else if (dbInterface == null) {
87	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
88	+	CIWrapper c = new CIWrapper(ciReal, queue);
89	+	c.start();
90	+	} else {
91	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
92	+	CIWrapper c = new CIWrapper(ciReal, queue);
93	+	c.start();
94	+	c = new CIWrapper(ciDB, queue);
95	+	c.start();
96	+	}
97	+
98		// RootFilterServant start (for inbound child filter data)
99	<	refman.getLogger().write(toString, Logger.DEBUG, "starting Root Filter");
100	<	RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
99	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
100	>	RootFilterServant filterServant = new RootFilterServant(queue);
101		// bind to the naming service as a filter
102	<	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
102	>	_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME);
103
104	<	// start the POA off
83	<	// now we are running, we just need to serve
84	<	// so we ask the orb to block for us until it has finished
85	<	refman.activatePOA();
86	<	refman.getLogger().write(toString, Logger.SYSINIT, "started");
87	<	refman.getORB().run();
104	>	_logger.write(toString(), Logger.SYSINIT, "started");
105		}
106	<
107	<	/**
108	<	* A simple method to print the usage of this class.
109	<	* It never returns, but instead exits to the system
110	<	* with a value 1, to indicate the system did not start
111	<	* properly.
106	>
107	>	/**
108	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
109	>	* method to provide clean logging (every class should have this).
110	>	*
111	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
112	>	* to format the toString()
113	>	*
114	>	* @return the name of this class and its CVS revision
115		*/
116	<	public static void usage() {
117	<	System.out.println("USAGE: java FilterMain <name>");
118	<	System.out.println("WHERE <name>:");
119	<	System.out.println("      The unique identifier for the Filter in the system.");
120	<	System.exit(1);
116	>	public String toString() {
117	>	return FormatName.getName(
118	>	NAME,
119	>	getClass().getName(),
120	>	REVISION);
121		}
122
103	–	//---CONSTRUCTORS---
104	–
105	–	//---PUBLIC METHODS---
106	–
123		//---PRIVATE METHODS---
124
125		//---ACCESSOR/MUTATOR METHODS---
126
127		//---ATTRIBUTES---
128
129	+	/**
130	+	* This holds a reference to the
131	+	* system logger that is being used.
132	+	*/
133	+	private Logger _logger = ReferenceManager.getInstance().getLogger();
134	+
135	+	/**
136	+	* A reference to the reference manager in use
137	+	*/
138	+	private ReferenceManager _refman = ReferenceManager.getInstance();
139	+
140		//---STATIC ATTRIBUTES---
141	+
142	+	/**
143	+	* The friendly name for this component, used by
144	+	* all related classes.
145	+	* This is set from the configuration.
146	+	*/
147	+	public static String NAME;
148
149		}

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