server/client/ClientMain.java

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2002 i-scream
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

//---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.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: tdb $
 * @version $Id: ClientMain.java,v 1.25 2003/05/05 22:05:04 tdb Exp $
 */
public class ClientMain implements Component {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public static final String REVISION = "$Revision: 1.25 $";
    
    /**
     * 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);
            
            String parent = ConfigurationProxy.getInstance().getProperty("Client." + ClientMain.NAME, "Client.parent");
            objRef = _refman.getCORBARef("iscream.ClientInterface\\." + parent);
            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 parentName = cp.getProperty("Client." + ClientMain.NAME, "Client.parent");
            // finally check the CLI is alive
            obj = _refman.getCORBARef("iscream.ClientInterface\\." + parentName);
        } 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.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:	1.26
Committed:	Sun Aug 1 10:40:40 2004 UTC (19 years, 9 months ago) by tdb
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.25:	+3 -3 lines
Log Message:	Catch a lot of old URL's and update them. Also remove a couple of old files that aren't used.
#	User	Rev	Content
1	tdb	1.21	/*
2			* i-scream central monitoring system
3	tdb	1.26	* http://www.i-scream.org
4	tdb	1.21	* 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	tdb	1.5	//---PACKAGE DECLARATION---
22	tdb	1.20	package uk.org.iscream.cms.server.client;
23	tdb	1.1
24	tdb	1.5	//---IMPORTS---
25	tdb	1.20	import uk.org.iscream.cms.server.clientinterface.*;
26			import uk.org.iscream.cms.server.componentmanager.*;
27			import uk.org.iscream.cms.server.core.*;
28	tdb	1.24	import uk.org.iscream.cms.util.*;
29	tdb	1.5
30			/**
31			* A startup component for the Local Clients.
32	ajm	1.19	* This class starts the CORBA client used for alerting
33			* purposes. It reads data using the ClientServant from CORBA
34			* calls by the i-scream client interface. This data is then
35			* used by the MonitorManager to pass to Monitors. Monitors then
36			* analyse the data and raise alerts if needed, these are passed to
37			* the Alerters, which send out alerts. They are looked after by
38			* the AlerterManager.
39	tdb	1.5	*
40	tdb	1.21	* @author $Author: tdb $
41	tdb	1.26	* @version $Id: ClientMain.java,v 1.25 2003/05/05 22:05:04 tdb Exp $
42	tdb	1.5	*/
43			public class ClientMain implements Component {
44
45			//---FINAL ATTRIBUTES---
46
47			/**
48			* The current CVS revision of this class
49			*/
50	tdb	1.26	public static final String REVISION = "$Revision: 1.25 $";
51	tdb	1.5
52			/**
53			* The friendly name for this component, used by
54			* all related classes.
55			*/
56			public static final String NAME = "LocalClient";
57
58			//---STATIC METHODS---
59
60			//---CONSTRUCTORS---
61
62			//---PUBLIC METHODS---
63
64			/**
65	ajm	1.19	* This starts the Local Client component.
66			* This starts the ClientServant, the MonitorManager and
67			* the AlerterManager, aswell as initialising any queues
68			* and obtaining any initial configuration.
69			*
70			* @throws ComponentStartException if the component fails to start
71	tdb	1.5	*/
72			public void start() throws ComponentStartException {
73	tdb	1.6	// get references to key objects
74	tdb	1.13	_logger = _refman.getLogger();
75	tdb	1.5
76			_logger.write(toString(), Logger.SYSINIT, "coming up");
77
78	tdb	1.17	// get a reference to the configuration proxy
79			ConfigurationProxy cp = ConfigurationProxy.getInstance();
80
81			// see if these Queue's need a size limit
82			try {
83			int queueSizeLimit = Integer.parseInt(cp.getProperty(NAME, "Queue.SizeLimit"));
84			String queueRemoveAlgorithm = cp.getProperty(NAME, "Queue.RemoveAlgorithm");
85			int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms);
86			if(algorithm != -1) {
87			_logger.write(toString(), Logger.DEBUG, "Starting 2 Queues with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm);
88			// we have valid values, so lets start it.
89			_alerterQueue = new Queue(queueSizeLimit, algorithm);
90			_monitorQueue = new Queue(queueSizeLimit, algorithm);
91			}
92			else {
93			_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm);
94			// just don't activate a limit
95			_alerterQueue = new Queue();
96			_monitorQueue = new Queue();
97			}
98			} catch (PropertyNotFoundException e) {
99			_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e);
100			// just don't activate a limit
101			_alerterQueue = new Queue();
102			_monitorQueue = new Queue();
103			} catch (NumberFormatException e) {
104			_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e);
105			// just don't activate a limit
106			_alerterQueue = new Queue();
107			_monitorQueue = new Queue();
108			}
109
110			// startup monitors on these queues
111			try {
112			// try to get the interval, if this fails, we won't start up the monitor
113			int queueMonitorInterval = Integer.parseInt(cp.getProperty(NAME, "Queue.MonitorInterval"));
114	tdb	1.18	_alerterQueue.startMonitor(queueMonitorInterval*1000, _monitorQueue, NAME + " Alerter");
115			_monitorQueue.startMonitor(queueMonitorInterval*1000, _monitorQueue, NAME + " Monitor");
116	tdb	1.17	} catch (PropertyNotFoundException e) {
117			_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e);
118	tdb	1.25	}
119	tdb	1.5
120	tdb	1.7	// setup the servant and connect
121	tdb	1.25	_logger.write(toString(), Logger.SYSINIT, "starting servant and connecting");
122	tdb	1.1	try {
123	ajm	1.9	ClientServant ref = new ClientServant(_monitorQueue);
124	tdb	1.5	org.omg.CORBA.Object objRef = _refman.getRootPOA().servant_to_reference(ref);
125	tdb	1.7	Client client = ClientHelper.narrow(objRef);
126	tdb	1.5
127	tdb	1.25	String parent = ConfigurationProxy.getInstance().getProperty("Client." + ClientMain.NAME, "Client.parent");
128			objRef = _refman.getCORBARef("iscream.ClientInterface\\." + parent);
129	tdb	1.5	CorbaClientListener listener = CorbaClientListenerHelper.narrow(objRef);
130
131			_logger.write(toString(), Logger.SYSINIT, "connecting");
132	tdb	1.8	CorbaControlHandler handler = listener.connect(client, NAME);
133	tdb	1.5	handler.startData();
134	tdb	1.1	}
135	tdb	1.5	catch(Exception e) {
136			// not sure what to do here
137			// so we just log the error
138			_logger.write(toString(), Logger.ERROR, "ERROR - " + e.getMessage());
139	tdb	1.1	}
140	tdb	1.7
141			// setup the MonitorManager
142	ajm	1.9	MonitorManager monMan = MonitorManager.getInstance();
143			monMan.start();
144
145			// setup the AlerterManager
146			AlerterManager alertMan = AlerterManager.getInstance();
147			alertMan.start();
148
149	tdb	1.5	_logger.write(toString(), Logger.SYSINIT, "started");
150			}
151	tdb	1.12
152			/**
153			* Does a dependency check. Used mainly at startup to
154			* see if the required dependencies (components) are up
155			* and running.
156			*
157			* @return a boolean value, true if the depdencies are satisfied
158			*/
159			public boolean depCheck() {
160			try {
161			org.omg.CORBA.Object obj;
162			// first check the ConfigurationManager is alive
163			obj = _refman.getCORBARef("iscream.ConfigurationManager");
164			// then get some info on the CLI
165			ConfigurationProxy cp = ConfigurationProxy.getInstance();
166	tdb	1.25	String parentName = cp.getProperty("Client." + ClientMain.NAME, "Client.parent");
167	tdb	1.12	// finally check the CLI is alive
168	tdb	1.25	obj = _refman.getCORBARef("iscream.ClientInterface\\." + parentName);
169	tdb	1.12	} catch(ComponentCORBAException e) {
170	tdb	1.14	System.err.println(toString() + ": Dependency Failure: "+e);
171	tdb	1.12	return false;
172			} catch(PropertyNotFoundException e) {
173	tdb	1.14	System.err.println(toString() + ": Unable to obtain configuration: "+e);
174	tdb	1.12	return false;
175			}
176			// dependency check suceeded
177			return true;
178			}
179
180	tdb	1.5	/**
181			* Overrides the {@link java.lang.Object#toString() Object.toString()}
182			* method to provide clean logging (every class should have this).
183			*
184	tdb	1.24	* This uses the uk.org.iscream.cms.util.FormatName class
185	tdb	1.5	* to format the toString()
186			*
187			* @return the name of this class and its CVS revision
188			*/
189			public String toString() {
190			return FormatName.getName(
191			NAME,
192			getClass().getName(),
193			REVISION);
194	tdb	1.1	}
195	tdb	1.5
196			//---PRIVATE METHODS---
197
198			//---ACCESSOR/MUTATOR METHODS---
199
200			//---ATTRIBUTES---
201
202			/**
203			* This holds a reference to the
204			* system logger that is being used.
205			*/
206	tdb	1.6	private Logger _logger;
207	tdb	1.5
208			/**
209			* A reference to the reference manager in use
210			*/
211	tdb	1.13	private ReferenceManager _refman = ReferenceManager.getInstance();
212	tdb	1.5
213			//---STATIC ATTRIBUTES---
214	ajm	1.9
215			/**
216			* A queue for the alerter manager
217			*/
218			public static Queue _alerterQueue;
219
220			/**
221			* A queue for the monitor manager
222			*/
223			public static Queue _monitorQueue;
224	tdb	1.1
225			}