You are viewing a plain text version of this content. The canonical link for it is here.
Posted to cvs@avalon.apache.org by ni...@apache.org on 2002/07/08 15:16:03 UTC
cvs commit: jakarta-avalon-excalibur/tweety/src/java/org/apache/avalon/excalibur/tweety Egg.java
nicolaken 2002/07/08 06:16:03
Added: tweety/src/java/org/apache/avalon/excalibur/tweety Egg.java
Log:
Added Egg.java class to make a really stripped down thing
(it's not an app, it's not a container, it's a ... thing ;-) that was the initial
checkin of tweety.
It's an educational starting point, and explains merely lifecycle.
Tweety proper expands the concept by introducing a more proper
App-Container(s)-component relationship.
Revision Changes Path
1.1 jakarta-avalon-excalibur/tweety/src/java/org/apache/avalon/excalibur/tweety/Egg.java
Index: Egg.java
===================================================================
/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) @year@ The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Jakarta", "Avalon", "Excalibur" and "Apache Software Foundation"
must not be used to endorse or promote products derived from this software
without prior written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation. For more information on the
Apache Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.avalon.excalibur.tweety;
import java.io.*;
import java.net.*;
import java.util.*;
import org.apache.avalon.framework.activity.*;
import org.apache.avalon.framework.component.*;
import org.apache.avalon.framework.configuration.*;
import org.apache.avalon.framework.context.*;
import org.apache.avalon.framework.logger.*;
import org.apache.avalon.framework.parameters.*;
import org.apache.avalon.framework.service.*;
import org.apache.avalon.framework.container.*;
/**
* This is a stripped down - collapsed version of Tweety+Main.
* It reads the configuration file, and creates the components.
* Then it disposes them.
*
* Useful to understand what Lifecycle is, without getting yet into
* what a Container is; this is application+Container all in one.
*
* After you understand this, look at Main and Tweety.
*
*@author <a href="mailto:nicolaken@apache.org">Nicola Ken Barozzi</a>
*@created June 20, 2002
*@version 1.0
*/
public class Egg
{
public static void main( String[] args )
{
Logger sharedLogger = new ConsoleLogger();
Context sharedContext = new DefaultContext();
DefaultComponentManager sharedComponentManager = new DefaultComponentManager();
DefaultServiceManager sharedServiceManager = new DefaultServiceManager();
try {
//load properties
Properties properties = new Properties();
properties.load(new FileInputStream("tweety.properties"));
//this will keep references to components so we know what to shutdown at the end
Object[] components = new Object[properties.size()];
//All the roles
Enumeration roles = properties.propertyNames();
//create and setup all the component
for (int i=0; roles.hasMoreElements(); i++) {
//Get the role of the component being setup
String role = (String )roles.nextElement();
//create the component instance
Object component = Class.forName((String) properties.get(role));
//setup the component by running the appropriate lifecycle methods in order
ContainerUtil.enableLogging(component, sharedLogger);
ContainerUtil.contextualize(component, sharedContext);
ContainerUtil.compose (component, sharedComponentManager);
ContainerUtil.service (component, sharedServiceManager);
//ContainerUtil.configure (component, configuration);
//ContainerUtil.parameterize (component, parameters);
ContainerUtil.initialize (component);
ContainerUtil.start (component);
//put the new component in the componentmanager and servicemanager
sharedServiceManager.put(role, component);
if(component instanceof org.apache.avalon.framework.component.Component){
sharedComponentManager.put(role, (Component) component);
}
components[i]=component;
}
//
// Here components that create threads continue operation till they wish
//
//shutdown all the components that were set up
for (int i=0 ; i<components.length; i++ ) {
Object component = components[i];
//shutdown the component by running the appropriate lifecycle methods in order
ContainerUtil.stop( component );
ContainerUtil.dispose( component );
}
} catch (java.io.IOException ioe) {
ioe.printStackTrace();
System.err.println("Error reading configuration file.\nProgram Terminated");
System.exit(-4);
} catch (Exception e) {
e.printStackTrace();
System.err.println("Error.\nProgram Terminated");
System.exit(-2);
}
}
}
--
To unsubscribe, e-mail: <ma...@jakarta.apache.org>
For additional commands, e-mail: <ma...@jakarta.apache.org>