server/componentmanager/ComponentManager.java

//---PACKAGE DECLARATION---
package uk.ac.ukc.iscream.componentmanager;

//---IMPORTS---
import uk.ac.ukc.iscream.util.*;
import java.util.*;
import java.io.*;

/**
 * The component manager is the starting point for all
 * server side components of the iscream system.
 * It loads its initial system configuration from the
 * default properties file, it then starts all the iscream
 * components as specified in the default.properties under
 * uk.ac.ukc.iscream.ComponentList
 *
 * @author  $Author: ajm4 $
 * @version $Id: ComponentManager.java,v 1.5 2000/12/12 20:45:56 ajm4 Exp $
 */
public class ComponentManager {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public static final String REVISION = "$Revision: 1.5 $";
    
    /**
     * The toString() of this class
     * As it won't be instatiated, this is needed.
     * Not also that we pass a null as the class name (as we are static)
     */
    public static final String toString = FormatName.getName("ComponentManager", null, REVISION);
    
    /**
     * The default location of the properties file for the system
     */
    public static final String DEFAULTPROPERTIES = "./etc/default.properties";
    
//---STATIC METHODS---

    /**
     * The main method which starts the components as
     * listed in the default.properties file.
     *
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        System.out.println("--- I-Scream System Component Manager ---");
        System.out.println("---          Starting System          ---");        
        
        // get the command line args
        // this is a bit messy and should be looked at
        String defaultProperties = DEFAULTPROPERTIES;
        String filterName = null;
        if (args.length > 0) {
            if (args[0].equals("-l")) {
                defaultProperties = args[1];
            } else if (args[0].equals("-f")) {
                filterName = args[1];
            } else if (args[2].equals("-l")) {
                filterName = args[3];
            } else if (args[2].equals("-f")) {
                filterName = args[3];
            } else {
                usage();
            }            
        }

        // load the default properties file into the system properties
        System.out.println(toString + ": initialising - using " + defaultProperties);
        try {
            Properties initProperties = new Properties(System.getProperties());
            initProperties.load(new FileInputStream(new File(defaultProperties)));
            System.setProperties(initProperties);
        } catch (Exception e) {
            System.err.println(toString + ": ERROR " + e.getMessage());
            usage();
        }

        // continue to bring the system up
        System.out.println(toString + ": coming up");
        
        // start the ORB by initialising the ReferenceManager
        ReferenceManager refman = ReferenceManager.getInstance();
        
        // now the ORB is running, we need to activate our RootPOA
        // so that we can start serving requests once servants start up
        refman.activatePOA();
        
        // get the list of components
        String componentList = System.getProperty("uk.ac.ukc.iscream.ComponentList");
        StringTokenizer st = new StringTokenizer(componentList, ";");
        
        // this could be done using reflection
        // but..well..we don't ;-p
        while (st.hasMoreTokens()){
            String componentName = st.nextToken();
            Component component = null;
            System.out.println(toString + ": starting component - " + componentName);
            
            // ### This is where the list of supported components is checked! ###
            if (componentName.equalsIgnoreCase("core")) {
                component = new uk.ac.ukc.iscream.core.Core();
            } else if (componentName.equalsIgnoreCase("filtermanager")) {
                component = new uk.ac.ukc.iscream.filtermanager.FilterManager();
            } else if (componentName.equalsIgnoreCase("rootfilter")) {
                component = new uk.ac.ukc.iscream.rootfilter.RootFilter();
            } else if (componentName.equalsIgnoreCase("dbinterface")) {
                component = new uk.ac.ukc.iscream.dbinterface.DBInterface();
            } else if (componentName.equalsIgnoreCase("clientinterface")) {
                component = new uk.ac.ukc.iscream.clientinterface.ClientInterfaceMain();
            }
            // ###  Add new component constructors in the above section! ###
            
            if (component != null) {
                try {
                    component.start();
                } catch (ComponentStartException e) {
                    System.err.println(toString + ": ERROR starting component - " + componentName);
                    System.err.println(toString + ": component reports - " + e.getMessage());
                    System.exit(1);
                }
            } else {
                System.err.println(toString + ": WARNING unsupported component not started");
            }
        }
            System.out.println(toString + ": running");
            
            // block on the ORB...in time, management functionality can be placed here.
        refman.getORB().run();
    }

    /**
     * A simple method to print the usage of this class.
     * It never returns, but instead exits to the system
     * with a value 1, to indicate the system did not start
     * properly.
     */
    public static void usage() {
        System.out.println("USAGE: java uk.ac.ukc.iscream.componentmanager.ComponentManager <option>");
        System.out.println("WHERE <option>:");
        System.out.println("      -l <filename> - the location of initial system properties");
        System.out.println("                      the default is ./etc/default.properties");
        System.out.println("      -f <name>     - the name of the filter (if there is one configured");
        System.out.println("      -h            - this help screen");
        System.exit(1);
    }

//---CONSTRUCTORS---

//---PUBLIC METHODS---

//---PRIVATE METHODS---

//---ACCESSOR/MUTATOR METHODS---

//---ATTRIBUTES---
    
//---STATIC ATTRIBUTES---

}
Revision:	1.6
Committed:	Wed Dec 13 12:58:03 2000 UTC (23 years, 5 months ago) by ajm
Branch:	MAIN
Changes since 1.5:	+4 -2 lines
Log Message:	now supports the clientinterface component
#	Content
1	//---PACKAGE DECLARATION---
2	package uk.ac.ukc.iscream.componentmanager;
3
4	//---IMPORTS---
5	import uk.ac.ukc.iscream.util.*;
6	import java.util.*;
7	import java.io.*;
8
9	/**
10	* The component manager is the starting point for all
11	* server side components of the iscream system.
12	* It loads its initial system configuration from the
13	* default properties file, it then starts all the iscream
14	* components as specified in the default.properties under
15	* uk.ac.ukc.iscream.ComponentList
16	*
17	* @author $Author: ajm4 $
18	* @version $Id: ComponentManager.java,v 1.5 2000/12/12 20:45:56 ajm4 Exp $
19	*/
20	public class ComponentManager {
21
22	//---FINAL ATTRIBUTES---
23
24	/**
25	* The current CVS revision of this class
26	*/
27	public static final String REVISION = "$Revision: 1.5 $";
28
29	/**
30	* The toString() of this class
31	* As it won't be instatiated, this is needed.
32	* Not also that we pass a null as the class name (as we are static)
33	*/
34	public static final String toString = FormatName.getName("ComponentManager", null, REVISION);
35
36	/**
37	* The default location of the properties file for the system
38	*/
39	public static final String DEFAULTPROPERTIES = "./etc/default.properties";
40
41	//---STATIC METHODS---
42
43	/**
44	* The main method which starts the components as
45	* listed in the default.properties file.
46	*
47	* @param args the command line arguments
48	*/
49	public static void main(String[] args) {
50	System.out.println("--- I-Scream System Component Manager ---");
51	System.out.println("--- Starting System ---");
52
53	// get the command line args
54	// this is a bit messy and should be looked at
55	String defaultProperties = DEFAULTPROPERTIES;
56	String filterName = null;
57	if (args.length > 0) {
58	if (args[0].equals("-l")) {
59	defaultProperties = args[1];
60	} else if (args[0].equals("-f")) {
61	filterName = args[1];
62	} else if (args[2].equals("-l")) {
63	filterName = args[3];
64	} else if (args[2].equals("-f")) {
65	filterName = args[3];
66	} else {
67	usage();
68	}
69	}
70
71	// load the default properties file into the system properties
72	System.out.println(toString + ": initialising - using " + defaultProperties);
73	try {
74	Properties initProperties = new Properties(System.getProperties());
75	initProperties.load(new FileInputStream(new File(defaultProperties)));
76	System.setProperties(initProperties);
77	} catch (Exception e) {
78	System.err.println(toString + ": ERROR " + e.getMessage());
79	usage();
80	}
81
82	// continue to bring the system up
83	System.out.println(toString + ": coming up");
84
85	// start the ORB by initialising the ReferenceManager
86	ReferenceManager refman = ReferenceManager.getInstance();
87
88	// now the ORB is running, we need to activate our RootPOA
89	// so that we can start serving requests once servants start up
90	refman.activatePOA();
91
92	// get the list of components
93	String componentList = System.getProperty("uk.ac.ukc.iscream.ComponentList");
94	StringTokenizer st = new StringTokenizer(componentList, ";");
95
96	// this could be done using reflection
97	// but..well..we don't ;-p
98	while (st.hasMoreTokens()){
99	String componentName = st.nextToken();
100	Component component = null;
101	System.out.println(toString + ": starting component - " + componentName);
102
103	// ### This is where the list of supported components is checked! ###
104	if (componentName.equalsIgnoreCase("core")) {
105	component = new uk.ac.ukc.iscream.core.Core();
106	} else if (componentName.equalsIgnoreCase("filtermanager")) {
107	component = new uk.ac.ukc.iscream.filtermanager.FilterManager();
108	} else if (componentName.equalsIgnoreCase("rootfilter")) {
109	component = new uk.ac.ukc.iscream.rootfilter.RootFilter();
110	} else if (componentName.equalsIgnoreCase("dbinterface")) {
111	component = new uk.ac.ukc.iscream.dbinterface.DBInterface();
112	} else if (componentName.equalsIgnoreCase("clientinterface")) {
113	component = new uk.ac.ukc.iscream.clientinterface.ClientInterfaceMain();
114	}
115	// ### Add new component constructors in the above section! ###
116
117	if (component != null) {
118	try {
119	component.start();
120	} catch (ComponentStartException e) {
121	System.err.println(toString + ": ERROR starting component - " + componentName);
122	System.err.println(toString + ": component reports - " + e.getMessage());
123	System.exit(1);
124	}
125	} else {
126	System.err.println(toString + ": WARNING unsupported component not started");
127	}
128	}
129	System.out.println(toString + ": running");
130
131	// block on the ORB...in time, management functionality can be placed here.
132	refman.getORB().run();
133	}
134
135	/**
136	* A simple method to print the usage of this class.
137	* It never returns, but instead exits to the system
138	* with a value 1, to indicate the system did not start
139	* properly.
140	*/
141	public static void usage() {
142	System.out.println("USAGE: java uk.ac.ukc.iscream.componentmanager.ComponentManager <option>");
143	System.out.println("WHERE <option>:");
144	System.out.println(" -l <filename> - the location of initial system properties");
145	System.out.println(" the default is ./etc/default.properties");
146	System.out.println(" -f <name> - the name of the filter (if there is one configured");
147	System.out.println(" -h - this help screen");
148	System.exit(1);
149	}
150
151	//---CONSTRUCTORS---
152
153	//---PUBLIC METHODS---
154
155	//---PRIVATE METHODS---
156
157	//---ACCESSOR/MUTATOR METHODS---
158
159	//---ATTRIBUTES---
160
161	//---STATIC ATTRIBUTES---
162
163	}