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From "Bill Barker" <wbar...@wilshire.com>
Subject Re: Launching an embedded Tomcat from Maven 1.x
Date Thu, 21 Apr 2005 06:02:32 GMT
Since you are using Embedded, your class needs to be loaded by the same 
ClassLoader that loads Tomcat.

You might want to look at the examples for loading Tomcat from ant in 
commons-modeler, as an alternative way of doing what you want.

"Alonso Dominguez" <alonso.domin@gmail.com> wrote in message 
news:58fcf450050420080428863962@mail.gmail.com...
Hi there!

I'm working to embed a Tomcat server as a servlet container inside an
Avalon Framework with a Loom engine. I looked for information how to
launch the Catalina service from Java and finally I wrote the next
file:

package org.jlabase.framework.tomcat.startup;

import java.io.File;
import java.net.InetAddress;
import org.apache.catalina.*;
import org.apache.catalina.connector.*;
import org.apache.catalina.realm.*;
import org.apache.catalina.startup.*;
import org.apache.tomcat.util.*;
import org.jlabase.framework.tomcat.*;

/**
 * @author <a href="mailto:alonso.domin@gmail.com">A. Alonso Dominguez</a>
 * @version 1.0
 */
public class TomcatImpl implements Tomcat {
private String path = null;
private Embedded catalina = null;
private Host host = null;
private Context rootContext;
private int port = 8080;

public String getPath() {
return path;
}
public void setPath(String value) {
path = value;
}

public int getPort() {
return port;
}
public void setPort(int value) {
port = value;
}

public void start() throws Exception {
Engine engine = null;

// Create an embedded server
catalina = new Embedded();
catalina.setCatalinaHome(getPath());
// Set the MemoryRealm
MemoryRealm mr = new MemoryRealm();
catalina.setRealm(mr);
// Create an engine
engine = catalina.createEngine();
engine.setDefaultHost("localhost");

// Create a default virtual host
host = catalina.createHost("localhost", getPath() + "/webapps");
engine.addChild(host);

// Create the ROOT context
rootContext = catalina.createContext("", getPath() + "/webapps/ROOT");
rootContext.setReloadable(false);
rootContext.addWelcomeFile("index.jsp");
host.addChild(rootContext);

// Create the Manager context
Context managerCtx = catalina.createContext("/manager", getPath() +
"/webapps/manager");
managerCtx.setPrivileged(true);
host.addChild(managerCtx);

// Assemble the container hierarchy
catalina.addEngine(engine);

// TODO Repair the Connector bug
String addr = null;
Connector connector = null;
InetAddress address = null;
try {
connector = new Connector();
connector.setSecure(false);
address = InetAddress.getLocalHost();
if(address != null) {
IntrospectionUtils.setProperty(connector, "address", address.toString());
}
IntrospectionUtils.setProperty(connector, "port", new
Integer(getPort()).toString());
}
catch(Exception e) {
e.printStackTrace();
}
connector.setEnableLookups(false);
catalina.addConnector(connector);
catalina.start();   // Starts the embedded server
}

public void stop() throws Exception {
catalina.stop();
}

public static void main(String args[]) {
System.out.println("Creating server instance...");
TomcatImpl tomcat = new TomcatImpl();
tomcat.setPath(
new File(System.getProperty("jlbframework.tomcat.home",
System.getProperty("basedir", "."))).getAbsolutePath()
);

try {
System.out.println("Using CATALINA_HOME = " + tomcat.getPath());
System.out.println("Starting server on port " + tomcat.getPort());
tomcat.start();
//tomcat.catalina.setAwait(true);
}
catch(Exception e) {
e.printStackTrace();
}
}

}

My intention is to configure the Catalina service from this class and
use a simple Ant-like script in Maven to launch the main method of
this class. So, my next step was write the maven.xml file, this is:

<project xmlns:ant="jelly:ant" xmlns:j="jelly:core"
xmlns:u="jelly:util" default="loom:sar">

  <goal name="jlbframework:tomcat-init">
    <ant:path id="tomcat.classpath">
      <j:forEach var="artifact" items="${pom.artifacts}">
        <j:set var="dependency" value="${artifact.dependency}" />
        <j:if test="${dependency.getProperty('sar.bundle')=='true'}">
          <ant:fileset
dir="${maven.repo.local}/${dependency.artifactDirectory}/jars"
prefix="lib">
            <ant:echo>Adding artifact: ${dependency.artifact} to the
Tomcat classpath.</ant:echo>
            <ant:include name="${dependency.artifact}" />
          </ant:fileset>
        </j:if>
      </j:forEach>
      <ant:pathelement path="${jlbframework.tomcat.home}/conf" />
    </ant:path>
  </goal>

  <goal name="jlbframework:tomcat-start"
prereqs="jar:jar,jlbframework:tomcat-init">
    <ant:echo>Starting Tomcat in stand-alone mode...</ant:echo>
    <ant:java jar="${maven.build.dir}/${maven.final.name}.jar"
fork="true" maxmemory="15M" failonerror="true"
      classpathref="tomcat.classpath">
      <ant:sysproperty key="basedir" value="${basedir}" />
      <ant:sysproperty key="jlbframework.home" value="${jlbframework.home}" 
/>
      <ant:sysproperty key="jlbframework.tomcat.home"
value="${jlbframework.tomcat.home}" />
    </ant:java>
  </goal>

</project>

And this are the contents of the project.properties file:

jlbframework.home=${basedir}/../..
jlbframework.tomcat.home=${basedir}

maven.xdoc.date=left
maven.xdoc.version=${pom.currentVersion}

maven.eclipse.resources.addtoclasspath=true

maven.jar.mainclass=org.jlabase.framework.tomcat.startup.TomcatImpl

Well, after all I tried to launch tomcat using the goal
'jlbframework:tomcat-start' and this what I get:

...
jar:jar:

jlbframework:tomcat-init:
    [echo] Adding artifact: commons-el-1.0.jar to the Tomcat classpath.
    [echo] Adding artifact: commons-logging-1.0.4.jar to the Tomcat 
classpath.
    [echo] Adding artifact: commons-modeler-1.1M1.jar to the Tomcat 
classpath.
    [echo] Adding artifact: catalina-5.5.9.jar to the Tomcat classpath.
    [echo] Adding artifact: tomcat-util-5.5.9.jar to the Tomcat classpath.
    [echo] Adding artifact: servlet-api-5.0.18.jar to the Tomcat classpath.
    [echo] Adding artifact: servlets-default-5.5.9.jar to the Tomcat 
classpath.
    [echo] Adding artifact: jsp-api-5.0.18.jar to the Tomcat classpath.
    [echo] Adding artifact: catalina-optional-5.5.9.jar to the Tomcat 
classpath.
    [echo] Adding artifact: jasper-compiler-5.5.9.jar to the Tomcat 
classpath.
    [echo] Adding artifact: jasper-compiler-jdt-5.5.9.jar to the
Tomcat classpath.
    [echo] Adding artifact: jasper-runtime-5.5.9.jar to the Tomcat 
classpath.
    [echo] Adding artifact: naming-factory-5.0.18.jar to the Tomcat 
classpath.
    [echo] Adding artifact: naming-resources-5.5.9.jar to the Tomcat 
classpath.
    [echo] Adding artifact: tomcat-coyote-5.5.9.jar to the Tomcat classpath.
    [echo] Adding artifact: tomcat-http-5.5.9.jar to the Tomcat classpath.

jlbframework:tomcat-start:
    [echo] Starting Tomcat in stand-alone mode...
    [java] Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/catalina/Realm

BUILD FAILED
File...... 
/home/alonso/projects/jlabase/jlabase-framework/modules/jlbframework-tomcat-module/maven.xml
Element... ant:java
Line...... 22
Column.... 39
Java returned: 1
Total time: 25 seconds
Finished at: Wed Apr 20 14:50:28 CEST 2005

So, finally Java doesn't founds the Tomcat API. Can anyone help me with 
this?

Regards,
Alonso 




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