1 |
/* |
2 |
* i-scream central monitoring system |
3 |
* http://www.i-scream.org.uk |
4 |
* Copyright (C) 2000-2002 i-scream |
5 |
* |
6 |
* This program is free software; you can redistribute it and/or |
7 |
* modify it under the terms of the GNU General Public License |
8 |
* as published by the Free Software Foundation; either version 2 |
9 |
* of the License, or (at your option) any later version. |
10 |
* |
11 |
* This program is distributed in the hope that it will be useful, |
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 |
* GNU General Public License for more details. |
15 |
* |
16 |
* You should have received a copy of the GNU General Public License |
17 |
* along with this program; if not, write to the Free Software |
18 |
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
19 |
*/ |
20 |
|
21 |
//---PACKAGE DECLARATION--- |
22 |
package uk.org.iscream.cms.server.core; |
23 |
|
24 |
//---IMPORTS--- |
25 |
import uk.org.iscream.cms.server.util.*; |
26 |
import uk.org.iscream.cms.server.componentmanager.*; |
27 |
|
28 |
/** |
29 |
* The main class for the CORE of the I-Scream system. |
30 |
* This class is the component for CORE I-Scream services |
31 |
* namely the Logger and the ConfigurationManager. |
32 |
* It registers and starts them, at which point it essentially |
33 |
* finishs its role and the started services continue to |
34 |
* serve requests from the I-Scream system. |
35 |
* |
36 |
* @author $Author: tdb $ |
37 |
* @version $Id: Core.java,v 1.26 2002/05/18 18:16:01 tdb Exp $ |
38 |
*/ |
39 |
public class Core implements Component { |
40 |
|
41 |
//---FINAL ATTRIBUTES--- |
42 |
|
43 |
/** |
44 |
* The current CVS revision of this class |
45 |
*/ |
46 |
public static final String REVISION = "$Revision: 1.26 $"; |
47 |
|
48 |
/** |
49 |
* The friendly name for this component, used by |
50 |
* all related classes. |
51 |
*/ |
52 |
public static final String NAME = "Core"; |
53 |
|
54 |
//---STATIC METHODS--- |
55 |
|
56 |
//---CONSTRUCTORS--- |
57 |
|
58 |
//---PUBLIC METHODS--- |
59 |
|
60 |
/** |
61 |
* This method starts the CORE |
62 |
* Currently the args are passed direct to the ORB, |
63 |
* so any ORB paramaters could go there. |
64 |
* |
65 |
*/ |
66 |
public void start() throws ComponentStartException { |
67 |
// start and bind each server in turn |
68 |
|
69 |
// work out which logger to use |
70 |
String whichLogger = System.getProperty("uk.org.iscream.cms.server.LoggerClass"); |
71 |
String loggerPackage = System.getProperty("uk.org.iscream.cms.server.LoggerPackage"); |
72 |
|
73 |
// construct the relevant LoggerImpl |
74 |
LoggerImpl loggerImplRef = null; |
75 |
try { |
76 |
loggerImplRef = (LoggerImpl) ClassLoader.getSystemClassLoader().loadClass(loggerPackage + "." + whichLogger).newInstance(); |
77 |
} catch (Exception e) { |
78 |
// if anything goes wrong we throw a failed start exception |
79 |
throw new ComponentStartException("unable to load logging class"); |
80 |
} |
81 |
|
82 |
// setup and bind the LoggerServant |
83 |
LoggerServant loggerRef = new LoggerServant(loggerImplRef); |
84 |
_refman.bindToOrb(loggerRef, "iscream.Logger"); |
85 |
|
86 |
// get a reference to the servant as a Logger |
87 |
_logger = _refman.getLogger(); |
88 |
|
89 |
// create the Configurator |
90 |
ConfigurationManagerServant configManRef = new ConfigurationManagerServant(); |
91 |
|
92 |
// and advertise it to the naming context |
93 |
_refman.bindToOrb(configManRef, "iscream.ConfigurationManager"); |
94 |
|
95 |
_logger.write(toString(), Logger.SYSINIT, "started"); |
96 |
} |
97 |
|
98 |
/** |
99 |
* Does a dependency check. Used mainly at startup to |
100 |
* see if the required dependencies (components) are up |
101 |
* and running. |
102 |
* |
103 |
* @return a boolean value, true if the depdencies are satisfied |
104 |
*/ |
105 |
public boolean depCheck() { |
106 |
// the core has no depedencies |
107 |
return true; |
108 |
} |
109 |
|
110 |
/** |
111 |
* Overrides the {@link java.lang.Object#toString() Object.toString()} |
112 |
* method to provide clean logging (every class should have this). |
113 |
* |
114 |
* This uses the uk.org.iscream.cms.server.util.NameFormat class |
115 |
* to format the toString() |
116 |
* |
117 |
* @return the name of this class and its CVS revision |
118 |
*/ |
119 |
public String toString() { |
120 |
return FormatName.getName( |
121 |
_name, |
122 |
getClass().getName(), |
123 |
REVISION); |
124 |
} |
125 |
|
126 |
//---PRIVATE METHODS--- |
127 |
|
128 |
//---ACCESSOR/MUTATOR METHODS--- |
129 |
|
130 |
//---ATTRIBUTES--- |
131 |
|
132 |
/** |
133 |
* This is the friendly identifier of the |
134 |
* component this class is running in. |
135 |
* eg, a Filter may be called "filter1", |
136 |
* If this class does not have an owning |
137 |
* component, a name from the configuration |
138 |
* can be placed here. This name could also |
139 |
* be changed to null for utility classes. |
140 |
*/ |
141 |
private String _name = Core.NAME; |
142 |
|
143 |
/** |
144 |
* This holds a reference to the |
145 |
* system logger that is being used. |
146 |
*/ |
147 |
private Logger _logger; |
148 |
|
149 |
/** |
150 |
* A reference to the reference manager in use |
151 |
*/ |
152 |
private ReferenceManager _refman = ReferenceManager.getInstance(); |
153 |
|
154 |
//---STATIC ATTRIBUTES--- |
155 |
|
156 |
} |