server/client/ClientMain.java

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

//---IMPORTS---
import uk.ac.ukc.iscream.clientinterface.*;
import uk.ac.ukc.iscream.componentmanager.*;
import uk.ac.ukc.iscream.core.*;
import uk.ac.ukc.iscream.util.*;

/**
 * A startup component for the Local Clients.
 *
 * @author  $Author: tdb1 $
 * @version $Id: ClientMain.java,v 1.12 2001/03/14 01:34:21 tdb1 Exp $
 */
public class ClientMain implements Component {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public static final String REVISION = "$Revision: 1.12 $";
    
    /**
     * The friendly name for this component, used by
     * all related classes.
     */
    public static final String NAME = "LocalClient";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

//---PUBLIC METHODS---

    /**
     * This starts the Local Client component
     */
    public void start() throws ComponentStartException {
        // get references to key objects
        _logger = _refman.getLogger();

        _logger.write(toString(), Logger.SYSINIT, "coming up");
            
        // configuration variables we require
        int queueMonitorInterval = 0;
        
        Configuration config = _refman.getCM().getConfiguration("LocalClient");
        if (config == null) {
            throw new ComponentStartException("Unable to obtain configuration for component");
        }
        else {
            try {
                // get the configuration properties we need
                queueMonitorInterval = Integer.parseInt(config.getProperty("Queue.MonitorInterval"));
            } catch (org.omg.CORBA.MARSHAL e) {
                throw new ComponentStartException("Unable to obtain requried configuration property for component");
            }
        }
               
        _logger.write(toString(), Logger.SYSINIT, "configured");
        
        // setup the queues, this must be done before both managers are setup
        String queueName;
        // setup a Queue for the servant -> monitor manager
        _monitorQueue = new Queue();
        
        // setup a Queue for the monitors -> alert manager
        _alerterQueue = new Queue();
        
        
        
        // setup the servant and connect
        _logger.write(toString(), Logger.SYSINIT, "starting servant and connecting");           
        try {
            ClientServant ref = new ClientServant(_monitorQueue);
            org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref);
            Client client = ClientHelper.narrow(objRef);
            
            // this name maybe shouldn't be static
            objRef = _refman.getCORBARef("iscream.ClientInterface.CorbaListener");
            CorbaClientListener listener = CorbaClientListenerHelper.narrow(objRef);
            
            _logger.write(toString(), Logger.SYSINIT, "connecting");
            CorbaControlHandler handler = listener.connect(client, NAME);
            handler.startData();
        }
        catch(Exception e) {
            // not sure what to do here
            // so we just log the error
            _logger.write(toString(), Logger.ERROR, "ERROR - " + e.getMessage());
        }
        
        // setup the MonitorManager
        MonitorManager monMan = MonitorManager.getInstance();
        monMan.start();
        
        // setup the AlerterManager
        AlerterManager alertMan = AlerterManager.getInstance();
        alertMan.start();
       
        _logger.write(toString(), Logger.SYSINIT, "started");
        
    }
    
    /**
     * Does a dependency check. Used mainly at startup to
     * see if the required dependencies (components) are up
     * and running.
     *
     * @return a boolean value, true if the depdencies are satisfied
     */
    public boolean depCheck() {
        try {
            org.omg.CORBA.Object obj;
            // first check the ConfigurationManager is alive
            obj = _refman.getCORBARef("iscream.ConfigurationManager");
            // then get some info on the CLI
            ConfigurationProxy cp = ConfigurationProxy.getInstance();
            String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName");
            // finally check the CLI is alive
            obj = _refman.getCORBARef("iscream.ClientInterface." + cli);
        } catch(ComponentCORBAException e) {
            _logger.write(toString(), Logger.WARNING, "Dependency Failure: "+e);
            return false;
        } catch(PropertyNotFoundException e) {
            _logger.write(toString(), Logger.WARNING, "Unable to obtain configuration: "+e);
            return false;
        }
        // dependency check suceeded
        return true;
    }
    
    /**
     * Overrides the {@link java.lang.Object#toString() Object.toString()}
     * method to provide clean logging (every class should have this).
     *
     * This uses the uk.ac.ukc.iscream.util.FormatName class
     * to format the toString()
     *
     * @return the name of this class and its CVS revision
     */
    public String toString() {
        return FormatName.getName(
            NAME,
            getClass().getName(),
            REVISION);
    }

//---PRIVATE METHODS---

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

//---ATTRIBUTES---

    /**
     * This holds a reference to the
     * system logger that is being used.
     */
    private Logger _logger;

    /**
     * A reference to the reference manager in use
     */
    private ReferenceManager _refman = ReferenceManager.getInstance();

//---STATIC ATTRIBUTES---

    /**
     * A queue for the alerter manager
     */
    public static Queue _alerterQueue;
    
    /**
     * A queue for the monitor manager
     */
    public static Queue _monitorQueue;

}
Revision:	1.13
Committed:	Wed Mar 14 01:43:47 2001 UTC (23 years, 2 months ago) by tdb
Branch:	MAIN
Changes since 1.12:	+5 -6 lines
Log Message:	We weren't grabbing a ReferenceManager reference until startup, although there is no reason (unlike the Logger) why we can't grab it on construction.
#	Content
1	//---PACKAGE DECLARATION---
2	package uk.ac.ukc.iscream.client;
3
4	//---IMPORTS---
5	import uk.ac.ukc.iscream.clientinterface.*;
6	import uk.ac.ukc.iscream.componentmanager.*;
7	import uk.ac.ukc.iscream.core.*;
8	import uk.ac.ukc.iscream.util.*;
9
10	/**
11	* A startup component for the Local Clients.
12	*
13	* @author $Author: tdb1 $
14	* @version $Id: ClientMain.java,v 1.12 2001/03/14 01:34:21 tdb1 Exp $
15	*/
16	public class ClientMain implements Component {
17
18	//---FINAL ATTRIBUTES---
19
20	/**
21	* The current CVS revision of this class
22	*/
23	public static final String REVISION = "$Revision: 1.12 $";
24
25	/**
26	* The friendly name for this component, used by
27	* all related classes.
28	*/
29	public static final String NAME = "LocalClient";
30
31	//---STATIC METHODS---
32
33	//---CONSTRUCTORS---
34
35	//---PUBLIC METHODS---
36
37	/**
38	* This starts the Local Client component
39	*/
40	public void start() throws ComponentStartException {
41	// get references to key objects
42	_logger = _refman.getLogger();
43
44	_logger.write(toString(), Logger.SYSINIT, "coming up");
45
46	// configuration variables we require
47	int queueMonitorInterval = 0;
48
49	Configuration config = _refman.getCM().getConfiguration("LocalClient");
50	if (config == null) {
51	throw new ComponentStartException("Unable to obtain configuration for component");
52	}
53	else {
54	try {
55	// get the configuration properties we need
56	queueMonitorInterval = Integer.parseInt(config.getProperty("Queue.MonitorInterval"));
57	} catch (org.omg.CORBA.MARSHAL e) {
58	throw new ComponentStartException("Unable to obtain requried configuration property for component");
59	}
60	}
61
62	_logger.write(toString(), Logger.SYSINIT, "configured");
63
64	// setup the queues, this must be done before both managers are setup
65	String queueName;
66	// setup a Queue for the servant -> monitor manager
67	_monitorQueue = new Queue();
68
69	// setup a Queue for the monitors -> alert manager
70	_alerterQueue = new Queue();
71
72
73
74	// setup the servant and connect
75	_logger.write(toString(), Logger.SYSINIT, "starting servant and connecting");
76	try {
77	ClientServant ref = new ClientServant(_monitorQueue);
78	org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref);
79	Client client = ClientHelper.narrow(objRef);
80
81	// this name maybe shouldn't be static
82	objRef = _refman.getCORBARef("iscream.ClientInterface.CorbaListener");
83	CorbaClientListener listener = CorbaClientListenerHelper.narrow(objRef);
84
85	_logger.write(toString(), Logger.SYSINIT, "connecting");
86	CorbaControlHandler handler = listener.connect(client, NAME);
87	handler.startData();
88	}
89	catch(Exception e) {
90	// not sure what to do here
91	// so we just log the error
92	_logger.write(toString(), Logger.ERROR, "ERROR - " + e.getMessage());
93	}
94
95	// setup the MonitorManager
96	MonitorManager monMan = MonitorManager.getInstance();
97	monMan.start();
98
99	// setup the AlerterManager
100	AlerterManager alertMan = AlerterManager.getInstance();
101	alertMan.start();
102
103	_logger.write(toString(), Logger.SYSINIT, "started");
104
105	}
106
107	/**
108	* Does a dependency check. Used mainly at startup to
109	* see if the required dependencies (components) are up
110	* and running.
111	*
112	* @return a boolean value, true if the depdencies are satisfied
113	*/
114	public boolean depCheck() {
115	try {
116	org.omg.CORBA.Object obj;
117	// first check the ConfigurationManager is alive
118	obj = _refman.getCORBARef("iscream.ConfigurationManager");
119	// then get some info on the CLI
120	ConfigurationProxy cp = ConfigurationProxy.getInstance();
121	String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName");
122	// finally check the CLI is alive
123	obj = _refman.getCORBARef("iscream.ClientInterface." + cli);
124	} catch(ComponentCORBAException e) {
125	_logger.write(toString(), Logger.WARNING, "Dependency Failure: "+e);
126	return false;
127	} catch(PropertyNotFoundException e) {
128	_logger.write(toString(), Logger.WARNING, "Unable to obtain configuration: "+e);
129	return false;
130	}
131	// dependency check suceeded
132	return true;
133	}
134
135	/**
136	* Overrides the {@link java.lang.Object#toString() Object.toString()}
137	* method to provide clean logging (every class should have this).
138	*
139	* This uses the uk.ac.ukc.iscream.util.FormatName class
140	* to format the toString()
141	*
142	* @return the name of this class and its CVS revision
143	*/
144	public String toString() {
145	return FormatName.getName(
146	NAME,
147	getClass().getName(),
148	REVISION);
149	}
150
151	//---PRIVATE METHODS---
152
153	//---ACCESSOR/MUTATOR METHODS---
154
155	//---ATTRIBUTES---
156
157	/**
158	* This holds a reference to the
159	* system logger that is being used.
160	*/
161	private Logger _logger;
162
163	/**
164	* A reference to the reference manager in use
165	*/
166	private ReferenceManager _refman = ReferenceManager.getInstance();
167
168	//---STATIC ATTRIBUTES---
169
170	/**
171	* A queue for the alerter manager
172	*/
173	public static Queue _alerterQueue;
174
175	/**
176	* A queue for the monitor manager
177	*/
178	public static Queue _monitorQueue;
179
180	}