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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 1.13 by ajm, Wed Dec 13 12:58:26 2000 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);
63	<	toString = "RootFilter{" + refman.getName() + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
64	<	refman.getLogger().write(toString, Logger.SYSINIT, "configured");
65	<
66	<	// get reference to the client interfaces - the real time one
67	<	ClientInterface ciReal = ClientInterfaceHelper.narrow(refman.getCORBARef("iscream.ClientInterface." + realInterface));
68	<	// - the db one ... but it's not done yet
69	<	//ClientInterface ciDB = ClientInterfaceHelper.narrow(refman.getCORBARef("iscream.ClientInterface." + dbInterface));
70	<	// so for the time being we null it.
71	<	ClientInterface ciDB = null;
72	<	refman.getLogger().write(toString, Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
66	>	NAME = ourName;
67
68	<	ClientInterface[] clientInterfaces = {ciReal, ciDB};
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	+	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;
81	+	if (realInterface == null) {
82	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface);
83	+	clientInterfaces = new ClientInterface[] {ciDB};
84	+	} else if (dbInterface == null) {
85	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface);
86	+	clientInterfaces = new ClientInterface[] {ciReal};
87	+	} else {
88	+	_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface);
89	+	clientInterfaces = new ClientInterface[] {ciReal, ciDB};
90	+	}
91	+
92		// RootFilterServant start (for inbound child filter data)
93	<	refman.getLogger().write(toString, Logger.DEBUG, "starting Root Filter");
93	>	_logger.write(toString(), Logger.DEBUG, "starting Root Filter");
94		RootFilterServant filterServant = new RootFilterServant(clientInterfaces);
95		// bind to the naming service as a filter
96	<	refman.bindToOrb(filterServant, "iscream.Filter." + refman.getName());
96	>	_refman.bindToOrb(filterServant, "iscream.Filter." + _name);
97
98	<	// 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();
98	>	_logger.write(toString(), Logger.SYSINIT, "started");
99		}
100	<
101	<	/**
102	<	* A simple method to print the usage of this class.
103	<	* It never returns, but instead exits to the system
104	<	* with a value 1, to indicate the system did not start
105	<	* properly.
100	>
101	>	/**
102	>	* Overrides the {@link java.lang.Object#toString() Object.toString()}
103	>	* method to provide clean logging (every class should have this).
104	>	*
105	>	* This uses the uk.ac.ukc.iscream.util.NameFormat class
106	>	* to format the toString()
107	>	*
108	>	* @return the name of this class and its CVS revision
109		*/
110	<	public static void usage() {
111	<	System.out.println("USAGE: java FilterMain <name>");
112	<	System.out.println("WHERE <name>:");
113	<	System.out.println("      The unique identifier for the Filter in the system.");
114	<	System.exit(1);
110	>	public String toString() {
111	>	return FormatName.getName(
112	>	_name,
113	>	getClass().getName(),
114	>	REVISION);
115		}
116
103	–	//---CONSTRUCTORS---
104	–
105	–	//---PUBLIC METHODS---
106	–
117		//---PRIVATE METHODS---
118
119		//---ACCESSOR/MUTATOR METHODS---
120
121		//---ATTRIBUTES---
122
123	+	/**
124	+	* This is the friendly identifier of the
125	+	* component this class is running in.
126	+	* eg, a Filter may be called "filter1",
127	+	* If this class does not have an owning
128	+	* component,  a name from the configuration
129	+	* can be placed here.  This name could also
130	+	* be changed to null for utility classes.
131	+	*/
132	+	private String _name = RootFilter.NAME;
133	+
134	+	/**
135	+	* This holds a reference to the
136	+	* system logger that is being used.
137	+	*/
138	+	private Logger _logger = ReferenceManager.getInstance().getLogger();
139	+
140	+	/**
141	+	* A reference to the reference manager in use
142	+	*/
143	+	private ReferenceManager _refman = ReferenceManager.getInstance();
144	+
145		//---STATIC ATTRIBUTES---
146	+
147	+	/**
148	+	* The friendly name for this component, used by
149	+	* all related classes.
150	+	* This is set from the configuration.
151	+	*/
152	+	public static String NAME;
153
154		}

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