server/client/ClientMain.java

//---PACKAGE DECLARATION---
package uk.org.iscream.cms.server.client;

//---IMPORTS---
import uk.org.iscream.cms.server.clientinterface.*;
import uk.org.iscream.cms.server.componentmanager.*;
import uk.org.iscream.cms.server.core.*;
import uk.org.iscream.cms.server.util.*;

/**
 * A startup component for the Local Clients.
 * This class starts the CORBA client used for alerting
 * purposes.  It reads data using the ClientServant from CORBA
 * calls by the i-scream client interface.  This data is then
 * used by the MonitorManager to pass to Monitors.  Monitors then
 * analyse the data and raise alerts if needed, these are passed to 
 * the Alerters, which send out alerts.  They are looked after by
 * the AlerterManager.
 *
 * @author  $Author: ajm4 $
 * @version $Id: ClientMain.java,v 1.19 2001/03/23 02:30:44 ajm4 Exp $
 */
public class ClientMain implements Component {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public static final String REVISION = "$Revision: 1.19 $";
    
    /**
     * 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.
     * This starts the ClientServant, the MonitorManager and
     * the AlerterManager, aswell as initialising any queues
     * and obtaining any initial configuration.
     *
     * @throws ComponentStartException if the component fails to start
     */
    public void start() throws ComponentStartException {
        // get references to key objects
        _logger = _refman.getLogger();

        _logger.write(toString(), Logger.SYSINIT, "coming up");
        
        // get a reference to the configuration proxy
        ConfigurationProxy cp = ConfigurationProxy.getInstance();
        
        // see if these Queue's need a size limit
        try {
            int queueSizeLimit = Integer.parseInt(cp.getProperty(NAME, "Queue.SizeLimit"));
            String queueRemoveAlgorithm = cp.getProperty(NAME, "Queue.RemoveAlgorithm");
            int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
            if(algorithm != -1) {
                _logger.write(toString(), Logger.DEBUG, "Starting 2 Queues with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
                // we have valid values, so lets start it.
                _alerterQueue = new Queue(queueSizeLimit, algorithm);
                _monitorQueue = new Queue(queueSizeLimit, algorithm);
            }
            else {
                _logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
                // just don't activate a limit
                _alerterQueue = new Queue();
                _monitorQueue = new Queue();
            }
        } catch (PropertyNotFoundException e) {
            _logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
            // just don't activate a limit
            _alerterQueue = new Queue();
            _monitorQueue = new Queue();
        } catch (NumberFormatException e) {
            _logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
            // just don't activate a limit
            _alerterQueue = new Queue();
            _monitorQueue = new Queue();
        }
        
        // startup monitors on these queues
        try {
            // try to get the interval, if this fails, we won't start up the monitor
            int queueMonitorInterval = Integer.parseInt(cp.getProperty(NAME, "Queue.MonitorInterval"));
            _alerterQueue.startMonitor(queueMonitorInterval*1000, _monitorQueue, NAME + " Alerter");
            _monitorQueue.startMonitor(queueMonitorInterval*1000, _monitorQueue, NAME + " Monitor");
        } catch (PropertyNotFoundException e) {
            _logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
        }        
        
        // 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) {
            System.err.println(toString() + ": Dependency Failure: "+e);
            return false;
        } catch(PropertyNotFoundException e) {
            System.err.println(toString() + ": 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.org.iscream.cms.server.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:	1.20
Committed:	Tue May 29 17:02:34 2001 UTC (22 years, 11 months ago) by tdb
Branch:	MAIN
Branch point for:	SERVER_PIRCBOT
Changes since 1.19:	+9 -9 lines
Log Message:	Major change in the java package naming. This has been held off for some time now, but it really needed doing. The future packaging of all i-scream products will be; uk.org.iscream.<product>.<subpart>.* In the case of the central monitoring system server this will be; uk.org.iscream.cms.server.* The whole server has been changed to follow this structure, and tested to a smallish extent. Further changes in other parts of the CMS will follow.
#	Content
1	//---PACKAGE DECLARATION---
2	package uk.org.iscream.cms.server.client;
3
4	//---IMPORTS---
5	import uk.org.iscream.cms.server.clientinterface.*;
6	import uk.org.iscream.cms.server.componentmanager.*;
7	import uk.org.iscream.cms.server.core.*;
8	import uk.org.iscream.cms.server.util.*;
9
10	/**
11	* A startup component for the Local Clients.
12	* This class starts the CORBA client used for alerting
13	* purposes. It reads data using the ClientServant from CORBA
14	* calls by the i-scream client interface. This data is then
15	* used by the MonitorManager to pass to Monitors. Monitors then
16	* analyse the data and raise alerts if needed, these are passed to
17	* the Alerters, which send out alerts. They are looked after by
18	* the AlerterManager.
19	*
20	* @author $Author: ajm4 $
21	* @version $Id: ClientMain.java,v 1.19 2001/03/23 02:30:44 ajm4 Exp $
22	*/
23	public class ClientMain implements Component {
24
25	//---FINAL ATTRIBUTES---
26
27	/**
28	* The current CVS revision of this class
29	*/
30	public static final String REVISION = "$Revision: 1.19 $";
31
32	/**
33	* The friendly name for this component, used by
34	* all related classes.
35	*/
36	public static final String NAME = "LocalClient";
37
38	//---STATIC METHODS---
39
40	//---CONSTRUCTORS---
41
42	//---PUBLIC METHODS---
43
44	/**
45	* This starts the Local Client component.
46	* This starts the ClientServant, the MonitorManager and
47	* the AlerterManager, aswell as initialising any queues
48	* and obtaining any initial configuration.
49	*
50	* @throws ComponentStartException if the component fails to start
51	*/
52	public void start() throws ComponentStartException {
53	// get references to key objects
54	_logger = _refman.getLogger();
55
56	_logger.write(toString(), Logger.SYSINIT, "coming up");
57
58	// get a reference to the configuration proxy
59	ConfigurationProxy cp = ConfigurationProxy.getInstance();
60
61	// see if these Queue's need a size limit
62	try {
63	int queueSizeLimit = Integer.parseInt(cp.getProperty(NAME, "Queue.SizeLimit"));
64	String queueRemoveAlgorithm = cp.getProperty(NAME, "Queue.RemoveAlgorithm");
65	int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
66	if(algorithm != -1) {
67	_logger.write(toString(), Logger.DEBUG, "Starting 2 Queues with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
68	// we have valid values, so lets start it.
69	_alerterQueue = new Queue(queueSizeLimit, algorithm);
70	_monitorQueue = new Queue(queueSizeLimit, algorithm);
71	}
72	else {
73	_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
74	// just don't activate a limit
75	_alerterQueue = new Queue();
76	_monitorQueue = new Queue();
77	}
78	} catch (PropertyNotFoundException e) {
79	_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
80	// just don't activate a limit
81	_alerterQueue = new Queue();
82	_monitorQueue = new Queue();
83	} catch (NumberFormatException e) {
84	_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
85	// just don't activate a limit
86	_alerterQueue = new Queue();
87	_monitorQueue = new Queue();
88	}
89
90	// startup monitors on these queues
91	try {
92	// try to get the interval, if this fails, we won't start up the monitor
93	int queueMonitorInterval = Integer.parseInt(cp.getProperty(NAME, "Queue.MonitorInterval"));
94	_alerterQueue.startMonitor(queueMonitorInterval*1000, _monitorQueue, NAME + " Alerter");
95	_monitorQueue.startMonitor(queueMonitorInterval*1000, _monitorQueue, NAME + " Monitor");
96	} catch (PropertyNotFoundException e) {
97	_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
98	}
99
100	// setup the servant and connect
101	_logger.write(toString(), Logger.SYSINIT, "starting servant and connecting");
102	try {
103	ClientServant ref = new ClientServant(_monitorQueue);
104	org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref);
105	Client client = ClientHelper.narrow(objRef);
106
107	// this name maybe shouldn't be static
108	objRef = _refman.getCORBARef("iscream.ClientInterface.CorbaListener");
109	CorbaClientListener listener = CorbaClientListenerHelper.narrow(objRef);
110
111	_logger.write(toString(), Logger.SYSINIT, "connecting");
112	CorbaControlHandler handler = listener.connect(client, NAME);
113	handler.startData();
114	}
115	catch(Exception e) {
116	// not sure what to do here
117	// so we just log the error
118	_logger.write(toString(), Logger.ERROR, "ERROR - " + e.getMessage());
119	}
120
121	// setup the MonitorManager
122	MonitorManager monMan = MonitorManager.getInstance();
123	monMan.start();
124
125	// setup the AlerterManager
126	AlerterManager alertMan = AlerterManager.getInstance();
127	alertMan.start();
128
129	_logger.write(toString(), Logger.SYSINIT, "started");
130	}
131
132	/**
133	* Does a dependency check. Used mainly at startup to
134	* see if the required dependencies (components) are up
135	* and running.
136	*
137	* @return a boolean value, true if the depdencies are satisfied
138	*/
139	public boolean depCheck() {
140	try {
141	org.omg.CORBA.Object obj;
142	// first check the ConfigurationManager is alive
143	obj = _refman.getCORBARef("iscream.ConfigurationManager");
144	// then get some info on the CLI
145	ConfigurationProxy cp = ConfigurationProxy.getInstance();
146	String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName");
147	// finally check the CLI is alive
148	obj = _refman.getCORBARef("iscream.ClientInterface." + cli);
149	} catch(ComponentCORBAException e) {
150	System.err.println(toString() + ": Dependency Failure: "+e);
151	return false;
152	} catch(PropertyNotFoundException e) {
153	System.err.println(toString() + ": Unable to obtain configuration: "+e);
154	return false;
155	}
156	// dependency check suceeded
157	return true;
158	}
159
160	/**
161	* Overrides the {@link java.lang.Object#toString() Object.toString()}
162	* method to provide clean logging (every class should have this).
163	*
164	* This uses the uk.org.iscream.cms.server.util.FormatName class
165	* to format the toString()
166	*
167	* @return the name of this class and its CVS revision
168	*/
169	public String toString() {
170	return FormatName.getName(
171	NAME,
172	getClass().getName(),
173	REVISION);
174	}
175
176	//---PRIVATE METHODS---
177
178	//---ACCESSOR/MUTATOR METHODS---
179
180	//---ATTRIBUTES---
181
182	/**
183	* This holds a reference to the
184	* system logger that is being used.
185	*/
186	private Logger _logger;
187
188	/**
189	* A reference to the reference manager in use
190	*/
191	private ReferenceManager _refman = ReferenceManager.getInstance();
192
193	//---STATIC ATTRIBUTES---
194
195	/**
196	* A queue for the alerter manager
197	*/
198	public static Queue _alerterQueue;
199
200	/**
201	* A queue for the monitor manager
202	*/
203	public static Queue _monitorQueue;
204
205	}