mcconnell 2003/12/20 17:43:47
Added: merlin/kernel/servlet .cvsignore maven.xml
project.properties project.xml
merlin/kernel/servlet/src/java/org/apache/avalon/merlin/servlet
MerlinServlet.java
merlin/kernel/servlet/src/webapp/WEB-INF web.xml
merlin/kernel/servlet/src/webapp/css merlin.css
merlin/kernel/servlet/src/webapp/images Paper.gif
Log:
Addition of an embedded kernel in a servlet.
Revision Changes Path
1.1 avalon/merlin/kernel/servlet/.cvsignore
Index: .cvsignore
===================================================================
target
maven.log
velocity.log
.classpath
.project
1.1 avalon/merlin/kernel/servlet/maven.xml
Index: maven.xml
===================================================================
<project default="war:install" xmlns:maven="jelly:maven" xmlns:j="jelly:core"
xmlns:util="jelly:util" xmlns:ant="jelly:ant">
<!--
Add the merlin.properties file.
-->
<postGoal name="java:compile">
<ant:copy file="${maven.repo.local}/${pom.groupId}/properties/merlin.properties"
toDir="${maven.build.dir}/classes" verbose="yes"/>
</postGoal>
</project>
1.1 avalon/merlin/kernel/servlet/project.properties
Index: project.properties
===================================================================
#
# war file name
#
maven.war.final.name = merlin.war
1.1 avalon/merlin/kernel/servlet/project.xml
Index: project.xml
===================================================================
<?xml version="1.0" encoding="ISO-8859-1"?>
<project>
<extend>${basedir}/../../project.xml</extend>
<groupId>merlin</groupId>
<id>merlin-servlet</id>
<name>Merlin Servlet</name>
<package>org.apache.avalon.merlin.servlet</package>
<currentVersion>3.2</currentVersion>
<inceptionYear>2002</inceptionYear>
<shortDescription>Merlin Servlet</shortDescription>
<description>
Merlin servlet is a servlet with an embedded Merlin Kernel.
</description>
<dependencies>
<dependency>
<groupId>avalon-meta</groupId>
<artifactId>avalon-meta-api</artifactId>
<version>1.3</version>
<type>jar</type>
<properties>
<war.bundle>true</war.bundle>
</properties>
</dependency>
<dependency>
<groupId>avalon-framework</groupId>
<artifactId>avalon-framework-api</artifactId>
<version>4.1.5</version>
<type>jar</type>
<properties>
<war.bundle>true</war.bundle>
</properties>
</dependency>
<dependency>
<groupId>avalon-repository</groupId>
<artifactId>avalon-repository-api</artifactId>
<version>1.2</version>
<type>jar</type>
<properties>
<war.bundle>true</war.bundle>
</properties>
</dependency>
<dependency>
<groupId>avalon-composition</groupId>
<artifactId>avalon-composition-api</artifactId>
<version>1.2.1</version>
<type>jar</type>
<properties>
<war.bundle>true</war.bundle>
</properties>
</dependency>
<dependency>
<groupId>avalon-activation</groupId>
<artifactId>avalon-activation-api</artifactId>
<version>1.2.1</version>
<type>jar</type>
<properties>
<war.bundle>true</war.bundle>
</properties>
</dependency>
<dependency>
<groupId>merlin</groupId>
<artifactId>merlin-api</artifactId>
<version>3.2</version>
<type>jar</type>
<properties>
<war.bundle>true</war.bundle>
</properties>
</dependency>
<dependency>
<groupId>avalon-repository</groupId>
<artifactId>avalon-repository-main</artifactId>
<version>1.2</version>
<type>jar</type>
<properties>
<war.bundle>true</war.bundle>
</properties>
</dependency>
<dependency>
<id>servletapi</id>
<version>2.3</version>
</dependency>
</dependencies>
</project>
1.1
avalon/merlin/kernel/servlet/src/java/org/apache/avalon/merlin/servlet/MerlinServlet.java
Index: MerlinServlet.java
===================================================================
/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 2003 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
[EMAIL PROTECTED]
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.merlin.servlet;
import java.io.File;
import java.io.IOException;
import java.util.Map;
import java.util.Hashtable;
import java.net.URL;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.avalon.activation.appliance.Appliance;
import org.apache.avalon.activation.appliance.Block;
import org.apache.avalon.composition.model.ContainmentModel;
import org.apache.avalon.framework.logger.Logger;
import org.apache.avalon.merlin.Kernel;
import org.apache.avalon.repository.Artifact;
import org.apache.avalon.repository.provider.Builder;
import org.apache.avalon.repository.provider.InitialContext;
import org.apache.avalon.repository.provider.Factory;
import org.apache.avalon.repository.RepositoryException;
import org.apache.avalon.repository.main.DefaultInitialContext;
import org.apache.avalon.repository.main.DefaultBuilder;
import org.apache.avalon.util.exception.ExceptionHelper;
import org.apache.avalon.util.env.Env;
/**
* Servlet that handles the establishment of a Merlin Kernel
* and registration of the kernel base URL under the servlet
* context using the key.
*
*
* @author <a href="mailto:[EMAIL PROTECTED]">Stephen McConnell</a>
*/
public class MerlinServlet extends HttpServlet
{
//----------------------------------------------------------
// static
//----------------------------------------------------------
private static final String MERLIN_PROPERTIES = "merlin.properties";
private static final String IMPLEMENTATION_KEY = "merlin.implementation";
//----------------------------------------------------------
// state
//----------------------------------------------------------
private Block m_block;
private Kernel m_kernel;
//----------------------------------------------------------
// Servlet
//----------------------------------------------------------
/**
* Initializes Servlet by the web server container.
*
* @exception ServletException if an error occurs
*/
public void init()
throws ServletException
{
ClassLoader classloader = MerlinServlet.class.getClassLoader();
try
{
String path = getServletContext().getRealPath( "." );
File base = new File( path );
File system = getMerlinSystemRepository();
InitialContext context =
new DefaultInitialContext(
base, classloader, null, system, null );
Artifact artifact =
DefaultBuilder.createImplementationArtifact(
classloader,
null,
base,
MERLIN_PROPERTIES,
IMPLEMENTATION_KEY );
Builder builder =
new DefaultBuilder( context, artifact );
Factory factory = builder.getFactory();
Map criteria = factory.createDefaultCriteria();
criteria.put( "merlin.server", "true" );
criteria.put( "merlin.info", "true" );
criteria.put( "merlin.debug", "true" );
//
// this is where we customize content based on web.xml
// (currently not implemented - lets see what we can do with
// with merlin.properties first of all)
//
m_kernel = (Kernel) factory.create( criteria );
System.out.println("kernel established");
getServletContext().setAttribute(
"merlin-root-block", m_kernel.getBlock() );
}
catch( Throwable e )
{
final String error = ExceptionHelper.packException( e, true );
System.out.println( error );
throw new ServletException( error, e );
}
}
/**
* Disposes of container manager and container instance.
*/
public void destroy()
{
if( m_kernel != null )
{
System.out.println("tearing down");
try
{
m_kernel.shutdown();
}
catch( Throwable e )
{
final String error =
"Runnable kernel shutdown failure.";
final String msg = ExceptionHelper.packException( error, e, true );
throw new RuntimeException( msg, null );
}
finally
{
m_kernel = null;
}
}
}
/**
* Respond to a GET request for the content produced by
* this servlet. This method should be overidden in a
*
* @param request The servlet request we are processing
* @param response The servlet response we are producing
*
* @exception IOException if an input/output error occurs
* @exception ServletException if a servlet error occurs
*/
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
response.setContentType("text/html");
PrintWriter writer = response.getWriter();
writer.println("<html>");
writer.println("<head>");
writer.println("<title>Merlin Test Servlet Page</title>");
writer.println("</head>");
writer.println("<body bgcolor=white>");
writer.println("<table border=\"0\">");
writer.println("<tr>");
writer.println("<td>");
writer.println("<h1>Merlin Servlet Info</h1>");
writer.println("</td>");
writer.println("</tr>");
writer.println("</table>");
writer.println("<hr/>");
}
/**
* Return the merlin system repository root directory.
*
* @param line the command line construct
* @return the merlin system root repository directory
*/
private static File getMerlinSystemRepository()
{
return new File( getMerlinHome( ), "system" );
}
/**
* Return the merlin home directory.
* @return the merlin install directory
*/
private static File getMerlinHome()
{
return new File( getMerlinHomePath() );
}
/**
* Return the merlin home directory path.
* @return the merlin install directory path
*/
private static String getMerlinHomePath()
{
try
{
String merlin =
System.getProperty(
"merlin.home",
Env.getEnvVariable( "MERLIN_HOME" ) );
if( null != merlin ) return merlin;
return System.getProperty( "user.home" )
+ File.separator + ".merlin";
}
catch( Throwable e )
{
final String error =
"Internal error while attempting to access MERLIN_HOME environment.";
final String message =
ExceptionHelper.packException( error, e, true );
throw new RuntimeException( message );
}
}
}
1.1 avalon/merlin/kernel/servlet/src/webapp/WEB-INF/web.xml
Index: web.xml
===================================================================
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd";>
<web-app>
<display-name>Merlin</display-name>
<description>
Merlin Servlet is a servlet with an embedded Merlin Kernel.
</description>
<servlet>
<servlet-name>merlin</servlet-name>
<servlet-class>org.apache.avalon.merlin.servlet.MerlinServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>merlin</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
1.1 avalon/merlin/kernel/servlet/src/webapp/css/merlin.css
Index: merlin.css
===================================================================
A:link {color: blue}
A:visited {color: lightslategray}
A:active {color: darkred}
BODY
{
margin: 0px;
}
.caption {
font-size: 70%;
margin-top: 2px; margin-bottom: 2px;
text-transform: uppercase
}
.title {
font-size: 130%;
margin-top: 20px;
margin-bottom: 12px;
}
.header-desc {
margin-top: 3px; margin-bottom: 3px;
}
.command,.command-gateway {
font-size: 80%;
margin-left: 6px;
margin-top: 1px;
margin-bottom: 1px;
text-transform: uppercase
}
.command-gateway {
margin-right: 24px;
}
.banner {
margin-top: 3px; margin-bottom: 3px;
}
.error {
font-size: 70%;
margin-top: 0px;
margin-bottom: 0px;
}
.table-row {
margin-top: 3px; margin-bottom: 3px;
}
P{
font-size: 10pt;
font-family: verdana; color: black;
margin-left: 3px;
margin-right: 3px;
}
.page-title-text {
color: #FFFFFF;
margin: 3px 5px 5px 3px;
font-size: large;
font-family: Verdana, Arial, Helvetica, sans-serif
}
1.1 avalon/merlin/kernel/servlet/src/webapp/images/Paper.gif
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