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root/i-scream/projects/cms/source/server/uk/org/iscream/cms/server/core/Core.java

Comparing projects/cms/source/server/uk/org/iscream/cms/server/core/Core.java (file contents):
Revision 1.11 by tdb, Fri Nov 17 16:25:18 2000 UTC vs.
Revision 1.12 by ajm, Mon Nov 20 17:11:44 2000 UTC

#	Line 1 | Line 1
1	<	//---PACKAGE DECLARATION---
2	<
3	<	//---IMPORTS---
4	<	import uk.ac.ukc.iscream.core.*;
5	<	import org.omg.CORBA.*;
6	<	import org.omg.CosNaming.*;
7	<	import org.omg.PortableServer.*;
8	<	import java.util.*;
9	<	import java.io.*;
10	<
11	<	/**
12	<	* The main class for the CORE of the I-Scream system.
13	<	* The main method of this class initialises the ORB
14	<	* and then starts and registers CORE I-Scream services
15	<	* with the name service.  At which point it essentially
16	<	* finishs its role and the started services continue to
17	<	* serve requests from the I-Scream system.
18	<	*
19	<	* @author  $Author$
20	<	* @version $Id$
21	<	*/
22	<	class Core {
23	<
24	<	//---FINAL ATTRIBUTES---
25	<
26	<	/**
27	<	* The current CVS revision of this class
28	<	*/
29	<	public static final String REVISION = "$Revision$";
30	<
31	<	/**
32	<	* The toString() of this class
33	<	* As it won't be instatiated, this is needed.
34	<	*/
35	<	public static final String toString = "CORE(" + REVISION.substring(11, REVISION.length() - 2) + ")";
36	<
37	<	/**
38	<	* The default location of the properties file for the system
39	<	*/
40	<	public static final String DEFAULTPROPERTIES = "default.properties";
41	<
42	<	//---STATIC METHODS---
43	<
44	<	/**
45	<	* The main method which starts the CORE
46	<	* Currently the args are passed direct to the ORB,
47	<	* so any ORB paramaters could go there.
48	<	*
49	<	* @param args the command line arguments
50	<	*/
51	<	public static void main(String[] args) {
52	<	System.out.println("--- I-Scream ---");
53	<
54	<	// get the command line args
55	<	String defaultProperties = DEFAULTPROPERTIES;
56	<	if (args.length > 0) {
57	<	if (args[0].equals("-l")) {
58	<	defaultProperties = args[1];
59	<	} else if (args[0].equals("-h")) {
60	<	usage();
61	<	} else {
62	<	usage();
63	<	}
64	<	}
65	<
66	<	// load the default properties file into the system properties
67	<	System.out.println(toString + ": initialising - using " + defaultProperties);
68	<	try {
69	<	Properties initProperties = new Properties(System.getProperties());
70	<	initProperties.load(new FileInputStream(new File(defaultProperties)));
71	<	System.setProperties(initProperties);
72	<
73	<
74	<	} catch (Exception e) {
75	<	System.err.println(toString + ": ERROR " + e.getMessage());
76	<	usage();
77	<	}
78	<
79	<	// continue to bring the system up
80	<	System.out.println(toString + ": coming up");
81	<	try {
82	<	// start the ORB
83	<	ORB orb = ORB.init(args, null);
84	<
85	<	// get the Root POA
86	<	org.omg.CORBA.Object objRef = orb.resolve_initial_references("RootPOA");
87	<	POA poa = POAHelper.narrow(objRef);
88	<
89	<	// get a hook to the name service
90	<	objRef = orb.resolve_initial_references("NameService");
91	<	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
92	<
93	<	// start and bind each server in turn
94	<
95	<	// work out the verbosity setting & which logger to use
96	<	int verbosity = Integer.parseInt(System.getProperty("uk.ac.ukc.iscream.Verbosity", defaultVerbosity));
97	<	String whichLogger = System.getProperty("uk.ac.ukc.iscream.LoggerClass", defaultLogger);
98	<	String loggerParams = System.getProperty("uk.ac.ukc.iscream.LoggerClassParams");
99	<
100	<	Logger logRef = null;
101	<	// create the logger (either Screen or File), and bind it
102	<	if(whichLogger.equals("ScreenLogger")){
103	<	ScreenLoggerServant loggerRef = new ScreenLoggerServant(verbosity);
104	<	objRef = poa.servant_to_reference(loggerRef);
105	<	ncRef.bind(ncRef.to_name("iscream.Logger"), objRef);
106	<	logRef = LoggerHelper.narrow(objRef);
107	<	}
108	<	else if(whichLogger.equals("FileLogger")){
109	<	FileLoggerServant loggerRef = new FileLoggerServant(loggerParams, verbosity);
110	<	objRef = poa.servant_to_reference(loggerRef);
111	<	ncRef.bind(ncRef.to_name("iscream.Logger"), objRef);
112	<	logRef = LoggerHelper.narrow(objRef);
113	<	}
114	<	else {
115	<	//need to deal with this
116	<	}
117	<
118	<	// and advertise it to the naming context
119	<	//objRef = poa.servant_to_reference(loggerRef);
120	<	//ncRef.bind(ncRef.to_name("iscream.Logger"), objRef);
121	<
122	<	// get a ref to the logger servant as a Logger reference
123	<	//Logger logRef = LoggerHelper.narrow(objRef);
124	<
125	<	// create the Configurator
126	<	String configLocation = System.getProperty("uk.ac.ukc.iscream.ConfigurationLocation", defaultConfigPath);
127	<	ConfiguratorServant configuratorRef = new ConfiguratorServant(configLocation, poa, logRef);
128	<
129	<	// and advertise it to the naming context
130	<	objRef = poa.servant_to_reference(configuratorRef);
131	<	ncRef.bind(ncRef.to_name("iscream.Configurator"), objRef);
132	<
133	<	// start the POA off
134	<	poa.the_POAManager().activate();
135	<
136	<	logRef.write(toString, Logger.SYSINIT, "started");
137	<
138	<	// now we are running, we just need to serve
139	<	// so we ask the orb to block for us until it has finished
140	<	orb.run();
141	<
142	<	// if there was a problem then we'll get to here
143	<	} catch (Exception e) {
144	<
145	<	// there is already another CORE of the same name registered
146	<	if ( e instanceof org.omg.CosNaming.NamingContextPackage.AlreadyBound) {
147	<	System.err.println("ERROR: Another I-Scream CORE is already registered under the same name.");
148	<
149	<	// otherwise we don't know what happened
150	<	// so print the error and do a stack trace
151	<	} else {
152	<	System.err.println("CORE ERROR: " + e);
153	<	e.printStackTrace(System.out);
154	<	}
155	<	}
156	<	}
157	<
158	<	/**
159	<	* A simple method to print the usage of this class.
160	<	* It never returns, but instead exits to the system
161	<	* with a value 1, to indicate the system did not start
162	<	* properly.
163	<	*/
164	<	public static void usage() {
165	<	System.out.println("USAGE: java Core.java <option>");
166	<	System.out.println("WHERE <option>:");
167	<	System.out.println("      -l <filename> - the location of initial system properties");
168	<	System.out.println("      -h            - this help screen");
169	<	System.exit(1);
170	<	}
171	<
172	<	//---CONSTRUCTORS---
173	<
174	<	//---PUBLIC METHODS---
175	<
176	<	//---PRIVATE METHODS---
177	<
178	<	//---ACCESSOR/MUTATOR METHODS---
179	<
180	<	//---ATTRIBUTES---
181	<
182	<	//---STATIC ATTRIBUTES---
183	<
184	<	/**
185	<	* Default verbosity setting, to be used when one is
186	<	* not provided in the configuration.
187	<	*/
188	<	private static final String defaultVerbosity = "3";
189	<
190	<	/**
191	<	* Default logger, to be used when one is not provided
192	<	* in the configuration.
193	<	*/
194	<	private static final String defaultLogger = "ScreenLogger";
195	<
196	<	/**
197	<	* Default configPath, to be used when one is not provided
198	<	* in the configuration.
199	<	*/
200	<	private static final String defaultConfigPath = ".";
201	<
202	<	}
1	>	//---PACKAGE DECLARATION---
2	>
3	>	//---IMPORTS---
4	>	import uk.ac.ukc.iscream.core.*;
5	>	import org.omg.CORBA.*;
6	>	import org.omg.CosNaming.*;
7	>	import org.omg.PortableServer.*;
8	>	import java.util.*;
9	>	import java.io.*;
10	>
11	>	/**
12	>	* The main class for the CORE of the I-Scream system.
13	>	* The main method of this class initialises the ORB
14	>	* and then starts and registers CORE I-Scream services
15	>	* with the name service.  At which point it essentially
16	>	* finishs its role and the started services continue to
17	>	* serve requests from the I-Scream system.
18	>	*
19	>	* @author  $Author$
20	>	* @version $Id$
21	>	*/
22	>	class Core {
23	>
24	>	//---FINAL ATTRIBUTES---
25	>
26	>	/**
27	>	* The current CVS revision of this class
28	>	*/
29	>	public static final String REVISION = "$Revision$";
30	>
31	>	/**
32	>	* The toString() of this class
33	>	* As it won't be instatiated, this is needed.
34	>	*/
35	>	public static final String toString = "CORE(" + REVISION.substring(11, REVISION.length() - 2) + ")";
36	>
37	>	/**
38	>	* The default location of the properties file for the system
39	>	*/
40	>	public static final String DEFAULTPROPERTIES = "default.properties";
41	>
42	>	//---STATIC METHODS---
43	>
44	>	/**
45	>	* The main method which starts the CORE
46	>	* Currently the args are passed direct to the ORB,
47	>	* so any ORB paramaters could go there.
48	>	*
49	>	* @param args the command line arguments
50	>	*/
51	>	public static void main(String[] args) {
52	>	System.out.println("--- I-Scream ---");
53	>
54	>	// get the command line args
55	>	String defaultProperties = DEFAULTPROPERTIES;
56	>	if (args.length > 0) {
57	>	if (args[0].equals("-l")) {
58	>	defaultProperties = args[1];
59	>	} else if (args[0].equals("-h")) {
60	>	usage();
61	>	} else {
62	>	usage();
63	>	}
64	>	}
65	>
66	>	// load the default properties file into the system properties
67	>	System.out.println(toString + ": initialising - using " + defaultProperties);
68	>	try {
69	>	Properties initProperties = new Properties(System.getProperties());
70	>	initProperties.load(new FileInputStream(new File(defaultProperties)));
71	>	System.setProperties(initProperties);
72	>
73	>
74	>	} catch (Exception e) {
75	>	System.err.println(toString + ": ERROR " + e.getMessage());
76	>	usage();
77	>	}
78	>
79	>	// continue to bring the system up
80	>	System.out.println(toString + ": coming up");
81	>	try {
82	>	// start the ORB
83	>	ORB orb = ORB.init(args, null);
84	>
85	>	// get the Root POA
86	>	org.omg.CORBA.Object objRef = orb.resolve_initial_references("RootPOA");
87	>	POA poa = POAHelper.narrow(objRef);
88	>
89	>	// get a hook to the name service
90	>	objRef = orb.resolve_initial_references("NameService");
91	>	NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef);
92	>
93	>	// start and bind each server in turn
94	>
95	>	// work out the verbosity setting & which logger to use
96	>	int verbosity = Integer.parseInt(System.getProperty("uk.ac.ukc.iscream.Verbosity", defaultVerbosity));
97	>	String whichLogger = System.getProperty("uk.ac.ukc.iscream.LoggerClass", defaultLogger);
98	>	String loggerParams = System.getProperty("uk.ac.ukc.iscream.LoggerClassParams");
99	>
100	>	Logger logRef = null;
101	>	// create the logger (either Screen or File), and bind it
102	>	if(whichLogger.equals("ScreenLogger")){
103	>	ScreenLoggerServant loggerRef = new ScreenLoggerServant(verbosity);
104	>	objRef = poa.servant_to_reference(loggerRef);
105	>	ncRef.bind(ncRef.to_name("iscream.Logger"), objRef);
106	>	logRef = LoggerHelper.narrow(objRef);
107	>	}
108	>	else if(whichLogger.equals("FileLogger")){
109	>	FileLoggerServant loggerRef = new FileLoggerServant(loggerParams, verbosity);
110	>	objRef = poa.servant_to_reference(loggerRef);
111	>	ncRef.bind(ncRef.to_name("iscream.Logger"), objRef);
112	>	logRef = LoggerHelper.narrow(objRef);
113	>	}
114	>	else {
115	>	//need to deal with this
116	>	}
117	>
118	>	// and advertise it to the naming context
119	>	//objRef = poa.servant_to_reference(loggerRef);
120	>	//ncRef.bind(ncRef.to_name("iscream.Logger"), objRef);
121	>
122	>	// get a ref to the logger servant as a Logger reference
123	>	//Logger logRef = LoggerHelper.narrow(objRef);
124	>
125	>	// create the Configurator
126	>	String configLocation = System.getProperty("uk.ac.ukc.iscream.ConfigurationLocation", defaultConfigPath);
127	>	ConfigurationManagerServant configManRef = new ConfigurationManagerServant(poa, logRef);
128	>
129	>	// and advertise it to the naming context
130	>	objRef = poa.servant_to_reference(configManRef);
131	>	ncRef.bind(ncRef.to_name("iscream.ConfigurationManager"), objRef);
132	>
133	>	// start the POA off
134	>	poa.the_POAManager().activate();
135	>
136	>	logRef.write(toString, Logger.SYSINIT, "started");
137	>
138	>	// now we are running, we just need to serve
139	>	// so we ask the orb to block for us until it has finished
140	>	orb.run();
141	>
142	>	// if there was a problem then we'll get to here
143	>	} catch (Exception e) {
144	>
145	>	// there is already another CORE of the same name registered
146	>	if ( e instanceof org.omg.CosNaming.NamingContextPackage.AlreadyBound) {
147	>	System.err.println("ERROR: Another I-Scream CORE is already registered under the same name.");
148	>
149	>	// otherwise we don't know what happened
150	>	// so print the error and do a stack trace
151	>	} else {
152	>	System.err.println("CORE ERROR: " + e);
153	>	e.printStackTrace(System.out);
154	>	}
155	>	}
156	>	}
157	>
158	>	/**
159	>	* A simple method to print the usage of this class.
160	>	* It never returns, but instead exits to the system
161	>	* with a value 1, to indicate the system did not start
162	>	* properly.
163	>	*/
164	>	public static void usage() {
165	>	System.out.println("USAGE: java Core.java <option>");
166	>	System.out.println("WHERE <option>:");
167	>	System.out.println("      -l <filename> - the location of initial system properties");
168	>	System.out.println("      -h            - this help screen");
169	>	System.exit(1);
170	>	}
171	>
172	>	//---CONSTRUCTORS---
173	>
174	>	//---PUBLIC METHODS---
175	>
176	>	//---PRIVATE METHODS---
177	>
178	>	//---ACCESSOR/MUTATOR METHODS---
179	>
180	>	//---ATTRIBUTES---
181	>
182	>	//---STATIC ATTRIBUTES---
183	>
184	>	/**
185	>	* Default verbosity setting, to be used when one is
186	>	* not provided in the configuration.
187	>	*/
188	>	private static final String defaultVerbosity = "3";
189	>
190	>	/**
191	>	* Default logger, to be used when one is not provided
192	>	* in the configuration.
193	>	*/
194	>	private static final String defaultLogger = "ScreenLogger";
195	>
196	>	/**
197	>	* Default configPath, to be used when one is not provided
198	>	* in the configuration.
199	>	*/
200	>	private static final String defaultConfigPath = ".";
201	>
202	>	}

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