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.
#	User	Rev	Content
1	tdb	1.5	//---PACKAGE DECLARATION---
2	tdb	1.1	package uk.ac.ukc.iscream.client;
3
4	tdb	1.5	//---IMPORTS---
5	tdb	1.1	import uk.ac.ukc.iscream.clientinterface.*;
6			import uk.ac.ukc.iscream.componentmanager.*;
7	tdb	1.5	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	tdb	1.13	* @author $Author: tdb1 $
14			* @version $Id: ClientMain.java,v 1.12 2001/03/14 01:34:21 tdb1 Exp $
15	tdb	1.5	*/
16			public class ClientMain implements Component {
17
18			//---FINAL ATTRIBUTES---
19
20			/**
21			* The current CVS revision of this class
22			*/
23	tdb	1.13	public static final String REVISION = "$Revision: 1.12 $";
24	tdb	1.5
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	tdb	1.6	// get references to key objects
42	tdb	1.13	_logger = _refman.getLogger();
43	tdb	1.5
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	ajm	1.9	// setup the queues, this must be done before both managers are setup
65			String queueName;
66	tdb	1.7	// setup a Queue for the servant -> monitor manager
67	ajm	1.9	_monitorQueue = new Queue();
68
69	tdb	1.10	// setup a Queue for the monitors -> alert manager
70	ajm	1.9	_alerterQueue = new Queue();
71
72
73	tdb	1.5
74	tdb	1.7	// setup the servant and connect
75			_logger.write(toString(), Logger.SYSINIT, "starting servant and connecting");
76	tdb	1.1	try {
77	ajm	1.9	ClientServant ref = new ClientServant(_monitorQueue);
78	tdb	1.5	org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref);
79	tdb	1.7	Client client = ClientHelper.narrow(objRef);
80	tdb	1.5
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	tdb	1.8	CorbaControlHandler handler = listener.connect(client, NAME);
87	tdb	1.5	handler.startData();
88	tdb	1.1	}
89	tdb	1.5	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	tdb	1.1	}
94	tdb	1.7
95			// setup the MonitorManager
96	ajm	1.9	MonitorManager monMan = MonitorManager.getInstance();
97			monMan.start();
98
99			// setup the AlerterManager
100			AlerterManager alertMan = AlerterManager.getInstance();
101			alertMan.start();
102
103	tdb	1.5	_logger.write(toString(), Logger.SYSINIT, "started");
104
105			}
106	tdb	1.12
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	tdb	1.5	/**
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	tdb	1.1	}
150	tdb	1.5
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	tdb	1.6	private Logger _logger;
162	tdb	1.5
163			/**
164			* A reference to the reference manager in use
165			*/
166	tdb	1.13	private ReferenceManager _refman = ReferenceManager.getInstance();
167	tdb	1.5
168			//---STATIC ATTRIBUTES---
169	ajm	1.9
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	tdb	1.1
180			}